KR102200144B1 - Compact type optical device for augmented reality which can prevent ghost images with wide field of view - Google Patents

Abstract

The present invention relates to a compact optical device for augmented reality (AR) having a ghost image prevention function and a wide view angle to increase optical efficiency transferring AR image light to an eye box. According to the present invention, the compact optical device for AR comprises: an optical means transmitting at least a part of real object image light toward the pupil of the user′s eye; a first reflective unit transferring AR image light, which is image light corresponding to an AR image output from an image projection unit, to a second reflective unit; and the second reflective unit reflecting and transferring the AR reality image light transferred from the first reflective unit toward the pupil of the user′s eye to provide the augmented reality image to the user.

Description

A compact augmented reality optical device with a ghost image blocking function and a wide viewing angle {COMPACT TYPE OPTICAL DEVICE FOR AUGMENTED REALITY WHICH CAN PREVENT GHOST IMAGES WITH WIDE FIELD OF VIEW}

The present invention relates to an optical device for augmented reality, and more particularly, it is possible to significantly reduce the size, thickness, weight and volume, and provide a clearer image for augmented reality by effectively blocking ghost images and at the same time providing a wide viewing angle. It relates to a compact augmented reality optical device having a capable ghost image blocking function and a wide viewing angle.

Augmented reality (AR) means providing a virtual image or image provided by a computer or the like superimposed on an actual image of the real world, as is well known.

In order to implement such augmented reality, an optical system is required that allows a virtual image or image generated by a device such as a computer to be superimposed on an image of the real world and provided. As such an optical system, a technique using optical means such as a prism for reflecting or refracting a virtual image using a head mounted display (HMD) or a glasses-type device is known.

However, devices using such conventional optical systems have a problem in that they are inconvenient for users to wear because their configuration is complex and thus their weight and volume are significant, and manufacturing processes are also complex, resulting in a high manufacturing cost.

In addition, conventional devices have a limitation in that the virtual image is out of focus when the user changes the focal length when gazing at the real world. To solve this problem, techniques such as using a configuration such as a prism capable of adjusting a focal length for a virtual image or electrically controlling a variable focal lens according to a change in a focal length have been proposed. However, this technology also has a problem in that a user must perform a separate operation in order to adjust the focal length or hardware and software such as a separate processor for controlling the focal length are required.

In order to solve such a problem of the prior art, the applicant of the present invention is a device capable of implementing augmented reality by projecting a virtual image onto the retina through the pupil using a reflector having a size smaller than that of a human pupil, as described in Patent Document 1 Has been developed.

1 is a view showing an optical device 100 for augmented reality as disclosed in Patent Document 1 above.

The optical device 100 for augmented reality of FIG. 1 includes an optical means 10, a reflective unit 30, an image output unit 40, and a frame unit 60.

The optical means 10 is a means for transmitting at least a part of the actual object image light, which is the image light emitted from the actual object, and may be, for example, a spectacle lens, and a reflective unit 30 is embedded therein. In addition, the optical means 10 transmits the augmented reality image light reflected from the reflecting unit 30 to the pupil.

The frame portion 60 is a means for fixing and supporting the image output portion 40 and the optical means 10, and may be, for example, a frame.

The image output unit 40 is a means for emitting augmented reality image light, which is an image light corresponding to an image for augmented reality. For example, an image for augmented reality is displayed on a screen to emit augmented reality image light. It may be provided with a collimator (collimator) for collimating the image light to be a parallel light.

The reflecting unit 30 provides an image for augmented reality by reflecting the image light corresponding to the image for augmented reality emitted from the image output unit 40 toward the pupil of the user.

The reflective part 30 of FIG. 1 is formed to have a size smaller than the size of a human pupil, that is, 8 mm or less. When the reflecting part 30 is formed to be smaller than the pupil size as described above, The depth of the incident light can be made almost infinite, that is, the depth of field can be made very deep. Here, the depth of field refers to the range in which the focus is recognized, and as the depth of field increases, the focal length of the image for augmented reality increases. Therefore, the user gazes at the real world. Even if the focal length for the world is changed, the focus of the image for augmented reality is always recognized as correct regardless of this. This can be seen as a kind of pin hole effect. Accordingly, a clear virtual image can always be provided for an image for augmented reality regardless of whether the user changes the focal length while gazing at a real object existing in the real world.

However, this technique has a limitation in that the size, thickness, and volume of the device increase because an additional optical means such as a collimator for parallel light is required in the image output unit 40.

In order to solve this problem, a method of performing the function of a collimator by embedding and arranging a reflector such as a concave mirror inside the optical means 10 without using a collimator in the image output unit 40 can be considered. According to the configuration, there is an advantage in that the size, thickness, and volume of the image output unit 40 can be reduced.

2 is an augmented reality optical device 100 in which an augmented reality optical device 100 of FIG. 1 is provided with a collimator in the image output unit 40 and an auxiliary reflector 20 that performs the function of a collimator. This is a comparison of the side view of -1).

In the augmented reality optical device 100 of FIG. 1 shown on the left side of FIG. 2, the image output unit 40 is composed of a display device 41 and a collimator 42, and the augmented reality optics on the right side of FIG. It can be seen that the device 100-1 is configured with only the display device 41 without the image output unit 40 without the collimator 42.

The augmented reality optical device 100-1 on the right side of FIG. 2 does not use the collimator 42 for the image output unit 40, but in the form of a concave mirror that can perform the function of a collimator inside the optical means 10 The auxiliary reflection unit 20 of the is disposed, and the augmented reality image light emitted from the image output unit 40 is reflected by the auxiliary reflection unit 20 and then transmitted to the reflection unit 30, and the reflection unit 30 ) Transmits the transmitted augmented reality image light to the pupil.

As such, the augmented reality optical device 100-1 as shown on the right side of FIG. 2 performs the same function as the augmented reality optical device 100 of FIG. 1, and provides a collimator to the image output unit 40. Since the configuration is not used, there is an advantage in that form factors such as size, volume, thickness, and weight can be significantly reduced compared to the augmented reality optical device 100 using an external collimator as shown in the left side of FIG. 2.

However, the augmented reality optical device 100-1 as shown on the right side of FIG. 2 has a problem in that unintended real object image light that generates a ghost image can also be transmitted to the pupil.

3 is a diagram for explaining the principle of generating a ghost image in the augmented reality optical device 100-1.

Referring to FIG. 3, the image light of an actual object, which is image light from an actual object, is directly transmitted to the pupil through the optical means 10, while miscellaneous light reflected by the auxiliary reflector 20 and transmitted to the pupil exists. The actual object image light transmitted to the pupil by the miscellaneous light is formed in a different position from the actual object image light transmitted directly to the pupil through the optical means 10, thereby generating a ghost image.

Therefore, while solving the ghost image problem that may occur in the augmented reality optical device 100-1 using the built-in collimator as shown in FIG. 2 using the auxiliary reflector 20 to reduce the form factor, Likewise, there is a need for a compact augmented reality optical device capable of expanding the field of view (FOV), reducing the size, thickness, weight, and volume of the device, and increasing optical efficiency for augmented reality image light.

Korean Registered Patent Publication No. 10-1660519 (announced on September 29, 2016)

The present invention provides an augmented reality optical device capable of remarkably reducing the size, thickness, weight and volume, effectively blocking ghost images and providing a wide viewing angle, as to solve the above-described problems. It is aimed at.

In addition, the present invention provides a clear virtual image while maximizing see-through by minimizing the outflow of real world image light that can generate ghost images to the pupil of the user. A compact augmented reality optical device capable of improving the optical efficiency of the augmented reality image light transmitted to the eyebox while providing a wide viewing angle by using the arrangement structure of a plurality of reflection modules that reflect and transmit real image light to the pupil. Another purpose is to provide.

In order to solve the above problems, the present invention provides a compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, comprising: an optical means for transmitting at least a part of image light of an actual object toward the pupil of the user's eye; A first reflecting unit disposed inside the optical means and transmitting an augmented reality image light corresponding to an augmented reality image emitted from the image output unit to a second reflecting unit; And a second reflecting unit disposed inside the optical means and providing an augmented reality image to the user by reflecting and transmitting the augmented reality image light transmitted from the first reflecting unit toward the pupil of the user's eye, The optical means has a first surface on which the actual object image light is incident, and a second surface through which the augmented reality image light and the actual object image light transmitted through the second reflector are emitted toward the pupil of the user's eye, and the The augmented reality image light emitted from the image output unit is transmitted to the first reflecting unit through the interior of the optical unit or is totally reflected on the inner surface of the optical unit to be transmitted to the first reflecting unit, and a first reflecting the augmented reality image light The reflecting surface of the reflecting unit is disposed to face the first surface of the optical means on which the image light of the object is incident, and the second reflecting unit reflects the augmented reality image light transmitted from the first reflecting unit to the pupil of the user. The augmented reality image light is composed of a plurality of reflection modules disposed inside the optical means so as to be transmitted to the plurality of reflection modules constituting the second reflection unit, as the distance from the first reflection unit increases. It provides a compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that disposed in the interior of the optical means so as to be closer to the second surface of the optical means emitting toward the.

Here, the first reflective portion may be disposed inside the optical means so as to face the image output portion with the second reflecting portion therebetween and face the first surface of the optical means.

In addition, the reflective surface of the first reflector may be formed in a curved surface.

In addition, the reflective surface of the first reflecting unit may be formed to be concave toward the first surface of the optical means.

In addition, it is preferable that the length of the first reflector in the width direction is 4 mm or less.

In addition, the first reflector may be formed as a half mirror that partially reflects light or a notch filter that selectively transmits light according to a wavelength.

In addition, the first reflector may be formed of a refractive element or a diffractive element.

In addition, a surface opposite to the reflective surface that reflects the augmented reality image light of the first reflector may be coated with a material that absorbs light without reflecting it.

In addition, a plurality of reflection modules constituting the second reflection unit are arranged to have an inclination angle with respect to the second surface of the optical means so that the augmented reality image light transmitted from the first reflection unit can be reflected toward the pupil and transmitted. Can be.

In addition, each of the plurality of reflection modules may be formed to have a size of 4 mm or less.

In addition, the size of each of the plurality of reflective modules may be a maximum length between any two points on an edge boundary of each reflective module.

In addition, the size of each of the plurality of reflection modules is the maximum length between any two points on the edge boundary of the orthogonal projection projected on a plane including the center of the pupil while being perpendicular to a straight line between the user's pupil and each reflection module Can be

In addition, each of the plurality of reflection modules may be disposed so that the augmented reality image light transmitted from the first reflection unit is not blocked by other reflection modules.

In addition, sizes of each of the plurality of reflection modules may be partially different from each other.

In addition, a spacing of at least some of the reflective modules may be different from that of other reflective modules.

In addition, at least some of the plurality of reflection modules may be formed as a half mirror that partially reflects light or a notch filter that selectively transmits light according to a wavelength.

In addition, at least some of the plurality of reflection modules may be formed of a refractive element or a diffractive element.

In addition, for at least some of the plurality of reflection modules, a surface opposite to a surface that reflects the augmented reality image light may be coated with a material that absorbs light without reflecting light.

In addition, at least a part of the surface of the plurality of reflective modules may be curved.

In addition, at least some of the plurality of reflection modules may have a different inclination angle with respect to the optical means than other reflection modules.

In addition, the second reflecting unit is composed of a plurality, and when the optical means is placed in front of the user's pupil, the front direction from the pupil is referred to as the x-axis, and a vertical line between the image output unit and the x-axis is parallel to the x-axis. While the line segment passing between the inner surfaces of the optical means is referred to as the y-axis, and the line segment that passes between the inner surfaces of the optical means while being perpendicular to the x-axis and the y-axis is referred to as the z-axis, the plurality of second reflectors are It can be arranged at intervals parallel to each other along the lines.

In addition, each of the second reflection units, each of a plurality of reflection modules constituting each second reflection unit, one of a plurality of reflection modules constituting the adjacent second reflection unit and a virtual They can be arranged side by side to be positioned along a straight line.

In addition, each of the second reflecting units, at least some of the plurality of reflecting modules constituting each of the plurality of second reflecting units, are parallel to the z-axis with respect to the plurality of reflecting modules constituting the adjacent second reflecting units. It can be arranged so that it is not positioned side by side on an imaginary straight line.

In addition, when the augmented reality optical device is placed in front of the user's pupil, the front direction from the pupil is referred to as the x-axis, and a line segment that passes between the inner surface of the optical means while being parallel along the x-axis and a vertical line between the image output unit and the x-axis Is referred to as a y-axis, and a line segment orthogonal to the x-axis and the y-axis and passing between the inner surfaces of the optical means is the z-axis, the plurality of reflection modules may be formed in a bar shape extending along the z-axis direction. have.

In addition, the first reflecting part may be formed to extend closer to the second reflecting part from a central portion toward both left and right ends when viewed in the x-axis direction.

According to the present invention, it is possible to provide an optical device for augmented reality that can significantly reduce the size, thickness, weight, and volume, effectively block ghost images, and provide a wide viewing angle.

In addition, according to the present invention, it is possible to provide a clear virtual image while maximizing see-through characteristics by minimizing the outflow of the real world image light that can generate a ghost image to the pupil of the user, Compact augmented reality optics that can improve the optical efficiency of augmented reality image light transmitted to the eyebox while providing a wide viewing angle by using an arrangement structure of a plurality of reflection modules that reflect and transmit augmented reality image light to the pupil. Device can be provided.

1 is a view showing an optical device 100 for augmented reality as disclosed in Patent Document 1 above.
2 is a view of the augmented reality optical device 100 of FIG. 1 in which a collimator is provided in the image output unit 40 and an augmented reality optical device 100-1 in which an auxiliary reflector performing the function of a collimator is disposed. It is shown by comparing the side view.
3 is a diagram for explaining the principle of generating a ghost image in the augmented reality optical device 100-1.
4 and 5 are views for explaining the configuration of a compact augmented reality optical device 200 having a ghost image blocking function and a wide viewing angle according to an embodiment of the present invention, and FIG. 4 is an optical device for augmented reality It is a side view of 200 and FIG. 5 is a perspective view of the optical device 200 for augmented reality.
6 is a diagram for explaining a principle in which the first reflecting unit 20 blocks a ghost image.
7 and 8 are diagrams showing the configuration of an optical device 300 for augmented reality according to another embodiment of the present invention, and FIG. 7 is a perspective view of an optical device 300 for augmented reality, and FIG. 8 is an optical device for augmented reality. It is a front view of the device 300.
9 and 10 are views showing the configuration of an optical device 400 for augmented reality according to another embodiment of the present invention, and FIG. 9 is a perspective view of an optical device 400 for augmented reality, and FIG. 10 is It is a front view of the optical device 400 for use.
11 and 12 are diagrams showing the configuration of an augmented reality optical device 500 according to another embodiment of the present invention, and FIG. 11 is a perspective view of an optical device 500 for augmented reality, and FIG. 12 is It is a front view of the optical device 500 for use.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 and 5 are a configuration of a compact augmented reality optical device 200 (hereinafter simply referred to as "augmented reality optical device 200") having a ghost image blocking function and a wide viewing angle according to an embodiment of the present invention. As a view for explaining, FIG. 4 is a side view of the optical device 200 for augmented reality, and FIG. 5 is a perspective view of the optical device 200 for augmented reality.

Referring to FIGS. 4 and 5, the optical device 200 for augmented reality according to the present embodiment includes an optical means 10, a first reflecting unit 20, and a second reflecting unit 30.

The optical means 10 is a means for transmitting at least a part of the actual object image light, which is the image light emitted from the actual object, toward the pupil 50 of the user's eye.

Here, transmitting at least a part of the image light of an actual object toward the pupil 50 means that the light transmittance of the image light of an actual object does not necessarily have to be 100%.

The optical means 10 includes a first surface 11 and a second surface 12 arranged so as to face each other. The first surface 11 is a surface on which the image light of an actual object is incident, and the second surface 12 is the augmented reality image light reflected from the second reflector 30 and the actual object passing through the first surface 11. It is the surface where the image light exits toward the pupil 50 of the user's eye.

In the embodiments of FIGS. 4 and 5, the augmented reality image light emitted from the image output unit 40 is totally reflected on the inner surface (the first surface 11) of the optical means 10 to the first reflection unit 20. Although the transmitted total reflection structure is shown, the augmented reality image light emitted from the image output unit 40 may be transmitted to the first reflection unit 20 through the interior of the optical means 10 without being based on total reflection.

When the total reflection structure is not used, that is, when the augmented reality image light emitted from the image output unit 40 is transmitted to the first reflection unit 20, an image is performed in consideration of the angle of the first reflection unit 20 The emission part 40 may be disposed at an appropriate position (eg, an appropriate position on an extension line of an arrow incident on the first reflective part 20 outside the optical means 10 in FIG. 4 ).

In the case of using a total reflection structure that is totally reflected from the inner surface of the optical means 10, as shown in Figs. 4 to 6, the augmented reality image light emitted from the image output unit 40 is the first side of the optical unit 10 The augmented reality image light reflected from the first reflecting unit 20 and reflected from the first reflecting unit 20 is reflected from the second reflecting unit 30 and is reflected through the second surface 12. It exits into the pupil (50).

Here, the second reflecting unit 30 is composed of a plurality of reflective modules 31 to 35, and in this specification, the second reflecting unit 30 is collectively referred to as a plurality of reflecting modules 31 to 35. The detailed configuration of the second reflecting unit 30 will be described later.

The image output section 40 is a means for emitting augmented reality image light. The image output unit 40, as described above, emits the augmented reality image light to the first reflecting unit 20 or to the first surface 11 of the optical means 10, for example, a display such as a small LCD It can be a device. Since the image output unit 40 itself is not a direct object of the present invention and is known by the prior art, a detailed description thereof will be omitted here. However, the image output unit 40 in the present embodiment does not include a configuration such as a collimator as described in the description of the background of the present invention.

Meanwhile, an image for augmented reality means a virtual image transmitted to the user's pupil 50 through the image output unit 40, the optical means 10, the first reflective unit 20, and the second reflective unit 30. It refers to an image, and may be a still image in the form of an image or a moving image.

The image for augmented reality is transmitted to the user's pupil 50 by the image output unit 40, the optical unit 10, the first reflection unit 20, and the second reflection unit 30, thereby providing a virtual image to the user. At the same time, the user can receive the augmented reality service by receiving the actual object image light emitted from the actual object existing in the real world through the optical means 10.

The first reflecting unit 20 is disposed inside the optical unit 10 and is a means for transmitting the augmented reality image light emitted from the image emitting unit 40 to the second reflecting unit 30.

As described above, the image output unit 40 emits the augmented reality image light toward the first reflecting unit 20 or the first surface 11 of the optical means 10. In the case of using the total reflection structure, the augmented reality image light totally reflected from the first surface 11 of the optical means 10 is transmitted to the first reflecting unit 20, and the augmented reality reflected by the first reflecting unit 20 The image light is transmitted to the second reflecting unit 30, reflected again by the second reflecting unit 30, and emitted toward the pupil 50. In the case of not having a total reflection structure, the augmented reality image light emitted from the image output unit 40 is directly transmitted to the first reflection unit 20, and the augmented reality image light reflected from the first reflection unit 20 is a second reflection unit. It is delivered to (30). The augmented reality image light transmitted to the second reflecting unit 30 is reflected again by the second reflecting unit 30 and emitted toward the pupil 50.

When using the total reflection structure, the 1st reflection part 20 is arrange|positioned inside the optical means 10 so that it may face the image output part 40 with the 2nd reflection part 30 interposed therebetween.

In addition, the first reflecting unit 20 is between the first side 11 and the second side 12 of the optical means 10 so as to reflect the image light for augmented reality toward the second reflecting unit 30 It is placed inside. That is, the first reflecting unit 20 may transmit the augmented reality image light emitted from the image output unit 40 or the augmented reality image light reflected from the first surface 11 of the optical means 10 and transmitted to the second reflecting unit. It is disposed inside the optical means 10 between the first side 11 and the second side 12 so that it can be reflected and transmitted to 30.

In addition, the first reflecting unit 20 includes a reflective surface 21 of the first reflecting unit 20 that reflects the augmented reality image light, and the first surface 11 of the optical means 10 on which the actual object image light is incident. It is disposed inside the optical means 10 to face ). With this configuration, the first reflecting unit 20 transmits the augmented reality image light to the second reflecting unit 30, while the miscellaneous light generating a ghost image from the real object image light emitted from the real object is second It is possible to perform a function of filtering without being transmitted to the pupil 50 through the reflective unit 30 or the second surface 12 of the optical means 10.

Meanwhile, the reflective surface 21 of the first reflective portion 20 may be formed in a curved surface. For example, the reflective surface 21 of the first reflecting unit 20 may be a concave mirror formed concave in the direction of the first surface 11 of the optical means 10 as shown in FIGS. 4 and 5, in this case The first reflecting unit 20 can serve as a collimator for collimating the augmented reality image light emitted from the image output unit 40, and thus, a configuration such as a collimator is used for the image output unit 40. no need.

6 is a diagram for explaining a principle in which the first reflecting unit 20 blocks a ghost image.

In FIG. 6, for convenience of description, the second reflector 30 is omitted.

As shown in FIG. 6, the real object image light (miscellaneous light) that is emitted from the real object and can generate a ghost image is incident on the first reflecting unit 20, as described above, the first reflecting unit 20 Is arranged to face the first surface 11 of the optical means 10 to which the actual object image light is incident, so that the actual object image light (miscellaneous light) reflected from the reflective surface 21 of the first reflector 20 It can be seen that the silver emits toward the second surface 12 of the optical means 10, is totally reflected again on the second surface 12 of the optical means 10, and is transmitted toward the image emitting unit 40. Accordingly, it can be seen that the real object image light, which is a miscellaneous light emitted from an actual object and capable of generating a ghost image, extinguishes inside the optical means 10 and does not flow out toward the pupil 50.

However, this principle explains the basic principle for preventing the actual object image light (miscellaneous light) reflected from the first reflector 20 from leaking out of the optical means 10, and in reality, the shape of the optical means 10 , In consideration of the refractive index, the position of the eye and the first reflecting part 20, the size of the pupil, and eye relief, and the external light (miscellaneous light) reflected by the first reflecting part 20 and entering the pupil 50 The position and direction of the first reflector 20 should be properly adjusted to minimize it.

Meanwhile, as will be described later, the size of the second reflective part 30 is 8 mm or less, more preferably 4 mm or less, which is the size of a general pupil of a person. The length in the width direction is 8 mm or less, more preferably 4 mm or less, so as to correspond to the size of the second reflector 30.

Here, the length in the width direction of the first reflector 20 means the length in the direction between the first surface 11 and the second surface 12 of the optical means 10 in FIGS. 4 and 5. .

In addition, the length of the first reflector 20 in the width direction may be a length between both ends when the first reflector 20 is viewed in the z-axis direction in FIG. 5.

In addition, the thickness of the first reflective part 20 when viewed from the front through the pupil 50 so that the user can hardly recognize the first reflective part 20 through the pupil 50 It is desirable to make it very thin

In addition, the first reflecting unit 20 may be configured by means such as a half mirror that partially reflects light.

In addition, the first reflecting part 20 may be formed of a refractive element or diffractive element other than reflecting means.

In addition, the first reflector 20 may be formed of an optical element such as a notch filter that selectively transmits light according to a wavelength.

In addition, a surface opposite to the reflective surface 21 that reflects the augmented reality image light of the first reflector 20 may be coated with a material that absorbs light without reflecting it.

The second reflective unit 30 will be described again with reference to FIGS. 4 and 5.

The second reflecting unit 30 is disposed inside the optical means 10 and reflects the augmented reality image light transmitted from the first reflecting unit 20 toward the pupil 50 of the user's eyes and transmits the As a means for providing an image for augmented reality to a person, it is formed of a plurality of reflection modules 31 to 35.

The plurality of reflection modules 31 to 35 are disposed inside the optical means 10 to reflect each of the augmented reality image light transmitted from the first reflection unit 20 and transmit it to the pupil 50 of the user.

As described above, since the augmented reality image light emitted from the image output unit 40 is transmitted to the second reflection unit 30 through the first reflection unit 20, a plurality of the second reflection units 30 are formed. The three reflective modules 31 to 35 are arranged to have an appropriate inclination angle with respect to the second surface 12 of the optical means 10 in consideration of the positions of the first reflecting part 20 and the pupil 50.

The plurality of reflection modules 31 to 35 have a size smaller than the size of a human pupil, that is, 8 mm or less, more preferably 4 mm, to obtain a pinhole effect by deepening the depth, as described in the technology behind the present invention. It is formed as follows.

That is, the plurality of reflective modules 31 to 35 are formed to have a size smaller than the size of a general pupil of a person, whereby the depth of light incident to the pupil 50 through each of the reflecting modules 31 to 35 of Field) can be made close to infinity, i.e. a very deep depth of field, so that even if the user changes the focal length to the real world while gazing at the real world, regardless of this, the image for augmented reality will always be perceived as in focus. It may cause a pin hole effect.

Here, the size of each of the plurality of reflection modules 31 to 35 is defined to mean the maximum length between any two points on the edge boundary of each of the reflection modules 31 to 35.

In addition, the size of each of the plurality of reflective modules 31 to 35 is perpendicular to a straight line between the pupil 50 and the reflective modules 31 to 35 and is positioned on a plane including the center of the pupil 50. ~35) can be the maximum length between any two points on the edge boundary of the projected orthographic projection.

Meanwhile, each of the plurality of reflection modules 31 to 35 is disposed so that the augmented reality image light transmitted from the first reflection unit 20 is not blocked by the other reflection modules 31 to 35. To this end, the plurality of reflection modules 31 to 35, as shown in Figs. 4 and 5, as an embodiment, as the distance from the first reflection unit 20 increases, the augmented reality image light is reduced to the pupil 50 ) May be disposed inside the optical means 10 to be closer to the inner surface of the optical means 10, that is, the second surface 12 of the optical means 10.

5, when the optical means 10 is placed in front of the user's pupil 50, the front direction of the pupil 50 is referred to as the x-axis, and the vertical line between the image output unit 40 and the x-axis When a line segment parallel to the x-axis and passing between the inner surfaces of the optical means 10 is referred to as the y-axis, the z-axis becomes a line segment orthogonal to the x-axis and the y-axis and passing between the inner surfaces of the optical means 10. At this time, when the optical means 10 is viewed in the z-axis direction, the reflection modules 31 to 35 appear as shown in FIG. 4.

That is, when viewing the optical means 10 in the z-axis direction, the plurality of reflection modules 31 to 35 are as shown in FIG. 4, and according to this configuration, as shown in FIG. 4, the image output unit 40 The augmented reality image light emitted from any one point is reflected by the first reflecting unit 20 that functions as a collimator and transmitted to the plurality of reflecting modules 31 to 35, respectively, and each reflecting module 31 to It can be seen that the parallel light reflected from 35) is transmitted to a point of the user's retina through the pupil 50 to form an image.

Meanwhile, the sizes of the plurality of reflection modules 31 to 35 are not necessarily the same, and may be partially different from each other.

In addition, the plurality of reflective modules 31 to 35 are preferably disposed at the same distance from each other, but the spacing of at least some of the reflective modules 31 to 35 may be differently disposed between the different reflecting modules 31 to 35 .

In addition, at least some of the plurality of reflection modules 31 to 35 may be configured by means such as a half mirror that partially reflects light.

In addition, at least some of the plurality of reflective modules 31 to 35 may be formed of other refractive elements or diffraction elements other than reflective means.

In addition, at least some of the plurality of reflection modules 31 to 35 may be formed of an optical element such as a notch filter that selectively transmits light according to a wavelength.

In addition, with respect to at least a portion of the plurality of reflection modules 31 to 35, a surface opposite to the surface reflecting the augmented reality image light may be coated with a material that absorbs light without reflecting light.

In addition, at least a part of the surface of the plurality of reflection modules 31 to 35 may be formed in a curved surface. Here, the curved surface may be a concave surface or a convex surface.

In addition, an inclination angle of at least some of the plurality of reflective modules 31 to 35 with respect to the optical means 10 may be formed differently from that of the other reflective modules 31 to 35.

7 and 8 are diagrams showing the configuration of an optical device 300 for augmented reality according to another embodiment of the present invention, and FIG. 7 is a perspective view of an optical device 300 for augmented reality, and FIG. 8 is an optical device for augmented reality. It is a front view of the device 300.

The augmented reality optical device 300 of FIGS. 7 and 8 has the same basic configuration as the augmented reality optical device 200 of the embodiment described with reference to FIGS. 4 to 6, but a plurality of reflection modules 31 to 35 ) Is formed in a plurality of second reflective portions 30A, 30B, 30C, and 30D.

Here, the plurality of second reflecting portions 30A, 30B, 30C, and 30D have the following arrangement structure. That is, as described above, when the optical means 10 is placed in front of the user's pupil 50, the front direction from the pupil 50 is referred to as the x-axis, and a vertical line between the image output unit 40 and the x-axis If the line segment that passes between the inner surfaces of the optical means 10 while being parallel along the x axis is called the y axis, the z axis becomes a line segment that passes between the inner surfaces of the optical means 10 while being orthogonal to the x axis and the y axis. The plurality of second reflecting portions 30A, 30B, 30C, and 30D are disposed at intervals parallel to each other along the z-axis direction.

Here, each of the plurality of reflective modules 31 to 35 constituting each of the second reflecting units 30A, 30B, 30C, and 30D, adjacent second reflecting units 30A, 30B, 30C, and 30D, That is, any one of the plurality of reflection modules 31 to 35 constituting the second reflecting units 30A, 30B, 30C, 30D on both sides and arranged side by side to be positioned along a virtual straight line parallel to the z-axis Can be. Accordingly, when the plurality of second reflectors 30 are viewed in the z-axis direction, they appear as shown in FIG. 4.

According to the embodiments of FIGS. 7 and 8, there is an advantage in that a viewing angle and an eye box in the z-axis direction can be widened while having the same effect as described with reference to FIGS. 4 to 6.

9 and 10 are views showing the configuration of an optical device 400 for augmented reality according to another embodiment of the present invention, and FIG. 9 is a perspective view of an optical device 400 for augmented reality, and FIG. 10 is It is a front view of the optical device 400 for use.

The augmented reality optical device 400 of the embodiment of FIGS. 9 and 10 is basically the same as the augmented reality optical device 300 of the embodiment described with reference to FIGS. 7 and 8, but a plurality of second reflectors 30A, At least some of the plurality of reflective modules 31 to 35 constituting each of the 30B, 30C, and 30D) are a plurality of reflective modules 31 to constituting the adjacent second reflecting units 30A, 30B, 30C, and 30D. 35) is characterized in that it is arranged so as not to be positioned side by side on an imaginary straight line parallel to the z-axis.

That is, as shown in FIGS. 9 and 10, the reflective modules 31 to 35 of the first second reflecting part 30A and the reflecting module of the second second reflecting part 30B adjacent to each other from the right direction of the z-axis ( 31 to 35) are sequentially compared from the upper side in the y-axis direction (toward the image output unit 40), each of the reflective modules 31 to 35 of the first second reflecting unit 30A is the second second reflecting unit ( It can be seen that all of the reflection modules 31 to 35 of 30B) are arranged so that they are not positioned along an imaginary straight line parallel to the z-axis. That is, the reflective modules 31 to 35 of the first second reflecting unit 30A and the reflecting modules 31 to 35 of the second second reflecting unit 30B are aligned parallel to the z axis when viewed in the z-axis direction. It can be seen that they are not arranged and are arranged alternately.

11 and 12 are diagrams showing the configuration of an augmented reality optical device 500 according to another embodiment of the present invention, and FIG. 11 is a perspective view of an optical device 500 for augmented reality, and FIG. 12 is It is a front view of the optical device 500 for use.

The augmented reality optical device 500 of FIGS. 11 and 12 is the same as the embodiment described with reference to FIGS. 4 and 5, but each of the plurality of reflective modules 31 to 35 extends in the z-axis direction. It is characterized in that it is formed in a) shape.

Here, each of the plurality of reflection modules 31 to 35 has the following arrangement structure. That is, as described above, when the augmented reality optical device 500 is placed in front of the user's pupil 50, the front direction from the pupil 50 is referred to as the x-axis, and the image output unit 40 and the x-axis If the vertical line between the vertical line and the line segment that passes between the inner surface of the optical means 10 while being parallel along the x-axis is referred to as the y-axis, the z-axis becomes a line segment that passes between the inner surfaces of the optical means 10 while being orthogonal to the x-axis and y-axis. , Here, the plurality of reflection modules 31 to 35 are formed in a bar shape extending along the z-axis direction.

Even in the case of this embodiment, when the optical means 10 is viewed in the z-axis direction, the plurality of reflective modules 31 to 35 have the same shape as shown in FIG. 4.

On the other hand, in the embodiment of FIGS. 7 to 12, the first reflecting part 20 is, when viewed in the x-axis direction, the second reflecting parts 30A, 30B, 30C, and 30D from the central portion toward the left and right ends. It is formed to extend closer to and is formed in the shape of a smooth “U” bar as a whole.

The overall length of the first reflecting portion 20 in the z-axis direction is extended to correspond to the length of the plurality of second reflecting portions 30A, 30B, 30C, and 30D in the z-axis direction.

Even in this case, as described above, the first reflecting unit 20 has a length of 4 mm or less in the width direction, and the reflective surface 21 reflecting the augmented reality image light is a direction in which the image light of an object is incident. It may be formed in a concave shape toward the first surface 11 of the phosphorus optical means 10.

In addition, other features of the first reflector 20 described in FIGS. 4 to 6 may also be applied to the embodiments of FIGS. 7 to 12 as it is.

In the above, the configuration of the present invention has been described with reference to a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, as well as various modifications and variations can be implemented within the scope of the present invention. .

For example, in the above embodiments, in the plurality of reflection modules 31 to 35 constituting the second reflection unit 30, as the distance from the first reflection unit 20 increases, the augmented reality image light is reduced to the pupil 50 Although it has been described that it is disposed inside the optical means 10 so as to be closer to the second surface 12 of the optical means emitting toward ), all the reflective modules 31 to 35 need not be arranged as such, and a plurality of Only some of the reflection modules 31 to 35 may be arranged as described above.

100...conventional augmented reality optics
200,300,400,500... compact augmented reality optics with ghost image blocking and wide viewing angle
10...optical means
11...the first side of the optical means (10)
12... second side of optical means (10)
20...first reflector
21,,,The reflective surface of the first reflective part 20
30...second reflector
31,32,33,34,35...reflection module
40...image display
50... pupil

Claims (25)

As a compact augmented reality optical device having a ghost image blocking function and a wide viewing angle,
Optical means for transmitting at least a part of the image light of an actual object toward the pupil of the user's eye;
A first reflecting unit disposed inside the optical means and transmitting an augmented reality image light corresponding to an augmented reality image emitted from the image output unit to a second reflecting unit; And
A second reflecting unit disposed inside the optical means and providing an augmented reality image to the user by reflecting and transmitting the augmented reality image light transmitted from the first reflecting unit toward the pupil of the user's eye
Including,
The optical means has a first surface on which the actual object image light is incident, and a second surface through which the augmented reality image light and the actual object image light transmitted through the second reflector are emitted toward the pupil of the user's eye,
The augmented reality image light emitted from the image output unit is transmitted to the first reflecting unit through the interior of the optical unit or is totally reflected on the inner surface of the optical unit to be transmitted to the first reflecting unit,
The reflective surface of the first reflecting unit for reflecting the augmented reality image light is disposed to face the first surface of the optical means to which the actual object image light is incident,
The second reflecting unit is composed of a plurality of reflecting modules disposed inside the optical means to reflect each of the augmented reality image light transmitted from the first reflecting unit and transmit it to the pupil of the user,
The plurality of reflective modules constituting the second reflecting unit may be located inside the optical unit so that the augmented reality image light is closer to the second surface of the optical unit emitting toward the pupil as the distance from the first reflecting unit increases. Placed,
The first reflecting unit having a ghost image blocking function and a wide viewing angle, characterized in that the first reflecting unit is disposed inside the optical unit so as to face the image output unit with the second reflecting unit therebetween and facing the first surface of the optical unit. Optical devices for compact augmented reality.
delete The method according to claim 1,
A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, wherein the reflecting surface of the first reflecting unit is formed in a curved surface.
The method of claim 3,
The reflective surface of the first reflecting unit is formed to be concave toward the first surface of the optical means, characterized in that the ghost image blocking function and a compact augmented reality optical device having a wide viewing angle.
The method according to claim 1,
A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, wherein the length in the width direction of the first reflector is 4 mm or less.
The method according to claim 1,
The first reflecting unit is a half mirror that partially reflects light or is formed of a notch filter that selectively transmits light according to a wavelength, characterized in that the ghost image blocking function and a compact augmented reality having a wide viewing angle Optical device.
The method according to claim 1,
The first reflector is a compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that formed of a refractive element or a diffractive element.
The method according to claim 1,
A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that the opposite surface of the reflective surface that reflects the augmented reality image light of the first reflector is coated with a material that absorbs light without reflecting light.
The method according to claim 1,
The plurality of reflection modules constituting the second reflecting unit are disposed to have an inclination angle with respect to the second surface of the optical means so that the augmented reality image light transmitted from the first reflecting unit can be reflected and transmitted toward the pupil. A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle.
delete As a compact augmented reality optical device having a ghost image blocking function and a wide viewing angle,
Optical means for transmitting at least a part of the image light of an actual object toward the pupil of the user's eye;
A first reflecting unit disposed inside the optical means and transmitting an augmented reality image light corresponding to an augmented reality image emitted from the image output unit to a second reflecting unit; And
A second reflecting unit disposed inside the optical means and providing an augmented reality image to the user by reflecting and transmitting the augmented reality image light transmitted from the first reflecting unit toward the pupil of the user's eye
Including,
The optical means has a first surface on which the actual object image light is incident, and a second surface through which the augmented reality image light and the actual object image light transmitted through the second reflector are emitted toward the pupil of the user's eye,
The augmented reality image light emitted from the image output unit is transmitted to the first reflecting unit through the interior of the optical unit or is totally reflected on the inner surface of the optical unit to be transmitted to the first reflecting unit,
The reflective surface of the first reflecting unit for reflecting the augmented reality image light is disposed to face the first surface of the optical means to which the actual object image light is incident,
The second reflecting unit is composed of a plurality of reflecting modules disposed inside the optical means to reflect each of the augmented reality image light transmitted from the first reflecting unit and transmit it to the pupil of the user,
The plurality of reflective modules constituting the second reflecting unit may be located inside the optical unit so that the augmented reality image light is closer to the second surface of the optical unit emitting toward the pupil as the distance from the first reflecting unit increases. Placed,
Each of the plurality of reflection modules is formed to have a size of 4 mm or less, and the size of each of the plurality of reflection modules is a maximum length between any two points on an edge boundary line of each reflection module, and a ghost image blocking function and Compact augmented reality optical device with a wide viewing angle.
As a compact augmented reality optical device having a ghost image blocking function and a wide viewing angle,
Optical means for transmitting at least a part of the image light of an actual object toward the pupil of the user's eye;
A first reflecting unit disposed inside the optical means and transmitting an augmented reality image light corresponding to an augmented reality image emitted from the image output unit to a second reflecting unit; And
A second reflecting unit disposed inside the optical means and providing an augmented reality image to the user by reflecting and transmitting the augmented reality image light transmitted from the first reflecting unit toward the pupil of the user's eye
Including,
The optical means has a first surface on which the actual object image light is incident, and a second surface through which the augmented reality image light and the actual object image light transmitted through the second reflector are emitted toward the pupil of the user's eye,
The augmented reality image light emitted from the image output unit is transmitted to the first reflecting unit through the interior of the optical unit or is totally reflected on the inner surface of the optical unit to be transmitted to the first reflecting unit,
The reflective surface of the first reflecting unit for reflecting the augmented reality image light is disposed to face the first surface of the optical means to which the actual object image light is incident,
The second reflecting unit is composed of a plurality of reflecting modules disposed inside the optical means to reflect each of the augmented reality image light transmitted from the first reflecting unit and transmit it to the pupil of the user,
The plurality of reflective modules constituting the second reflecting unit may be located inside the optical unit so that the augmented reality image light is closer to the second surface of the optical unit emitting toward the pupil as the distance from the first reflecting unit increases. Placed,
Each of the plurality of reflective modules is formed to have a size of 4 mm or less, and the size of each of the plurality of reflective modules is perpendicular to a straight line between the user's pupil and each reflective module and includes a reflective module on a plane including the center of the pupil. A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that the maximum length between any two points on the edge boundary of the projected orthographic projection.
The method according to claim 1,
Each of the plurality of reflection modules is arranged so that the augmented reality image light transmitted from the first reflection unit is not blocked by other reflection modules, and has a ghost image blocking function and a compact augmented reality optics having a wide viewing angle. Device.
The method according to claim 1,
A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that the sizes of each of the plurality of reflection modules are partially different from each other.
The method according to claim 1,
A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that the spacing of at least some of the plurality of reflective modules is different from that of other reflective modules.
The method according to claim 1,
At least some of the plurality of reflection modules are half-mirrors that partially reflect light, or are formed of a notch filter that selectively transmits light according to a wavelength, and a ghost image blocking function and a compact augmented reality optic having a wide viewing angle Device.
The method according to claim 1,
At least some of the plurality of reflective modules are formed of a refractive element or a diffractive element. A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle.
The method according to claim 1,
For at least a portion of the plurality of reflection modules, a ghost image blocking function and a compact augmentation having a wide viewing angle, characterized in that the opposite surface of the surface reflecting the augmented reality image light is coated with a material that absorbs light without reflecting light. Optical devices for reality.
The method according to claim 1,
A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that at least a portion of the surface of the plurality of reflection modules is formed in a curved surface.
The method according to claim 1,
A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that at least some of the plurality of reflection modules have an inclination angle with respect to the optical means differently from other reflection modules.
The method according to claim 1,
The second reflecting unit is composed of a plurality,
When the optical means is placed in front of the user's pupil, the front direction from the pupil is referred to as the x-axis, and a line segment passing between the inner surface of the optical means while being parallel along the x-axis and a vertical line between the image output unit and the x-axis is called the y-axis. And, when a line segment orthogonal to the x-axis and y-axis and passing between the inner surfaces of the optical means is referred to as the z-axis, the plurality of second reflectors are arranged at intervals parallel to each other along the z-axis direction. A compact augmented reality optical device with a ghost image blocking function and a wide viewing angle.
The method of claim 21,
Each of the second reflecting units has a virtual straight line parallel to the z-axis with any one of a plurality of reflecting modules constituting the adjacent second reflecting units. A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that it is arranged side by side so as to be positioned along.
The method according to claim 1,
Each of the second reflecting units, at least some of the plurality of reflecting modules constituting each of the plurality of second reflecting units, are virtually parallel to the z-axis with respect to the plurality of reflecting modules constituting the adjacent second reflecting units. A compact augmented reality optical device having a ghost image blocking function and a wide viewing angle, characterized in that it is disposed so as not to be positioned side by side on a straight line.
The method according to claim 1,
When the augmented reality optical device is placed in front of the user's pupil, the front direction from the pupil is referred to as the x-axis, and the line segment passing between the inner surface of the optical means while being parallel along the x-axis and the vertical line between the image output part and the x-axis is y When the line segment passing between the inner surface of the optical means while being orthogonal to the x-axis and y-axis is the z-axis, the plurality of reflection modules are formed in a bar shape extending along the z-axis direction. Compact augmented reality optics with ghost image blocking and wide viewing angle.
The method according to any one of claims 21 to 24,
The first reflector is a compact type having a ghost image blocking function and a wide viewing angle, characterized in that the first reflector is formed to extend closer to the second reflector toward the left and right ends from the center when viewed in the x-axis direction Optical devices for augmented reality.

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