CN217639769U - Image combination device and near-to-eye projection display equipment - Google Patents
Image combination device and near-to-eye projection display equipment Download PDFInfo
- Publication number
- CN217639769U CN217639769U CN202221771467.2U CN202221771467U CN217639769U CN 217639769 U CN217639769 U CN 217639769U CN 202221771467 U CN202221771467 U CN 202221771467U CN 217639769 U CN217639769 U CN 217639769U
- Authority
- CN
- China
- Prior art keywords
- super
- curved
- light
- phase
- prism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000000149 penetrating effect Effects 0.000 claims abstract description 10
- 239000002086 nanomaterial Substances 0.000 claims description 43
- 239000000758 substrate Substances 0.000 claims description 24
- 238000003384 imaging method Methods 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 9
- 230000001902 propagating effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000001934 delay Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 17
- 230000005540 biological transmission Effects 0.000 description 11
- 239000011521 glass Substances 0.000 description 8
- 238000002834 transmittance Methods 0.000 description 4
- 230000003190 augmentative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 1
- 229910005540 GaP Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Images
Landscapes
- Optical Elements Other Than Lenses (AREA)
Abstract
The application proposes an image combination device and a near-eye projection display apparatus, the image combination device comprising: a free-form surface prism and a curved super-surface; the curved super-surface comprises: a plurality of super-surface structure units disposed on the curved side of the freeform prism; each super surface structure unit in the plurality of super surface structure units can perform phase compensation on light rays penetrating through each super surface structure unit; the incident direction of the light rays emitted to the curved-surface super surface is the same as the emergent direction of the light rays after sequentially penetrating through the super-surface structure unit and the free-form surface prism. Through the image combination device and the near-eye projection display equipment, the curved-surface super-surface is used for replacing the compensating prism, the thickness of the image combination device is reduced, the light and thin near-eye projection display equipment is achieved, and the use by a user is facilitated.
Description
Technical Field
The application relates to the technical field of super-surface application, in particular to an image combination device and near-eye projection display equipment.
Background
Currently, augmented Reality (AR) is a technology that skillfully fuses virtual information with real-world scenes. The user can view the real scene image "enhanced" by the virtual information using AR equipment such as AR glasses.
AR glasses are bulky and heavy, and wearing comfort of the AR glasses is greatly influenced.
SUMMERY OF THE UTILITY MODEL
To solve the above problems, an object of an embodiment of the present application is to provide an image combining device and a near-eye projection display apparatus.
In a first aspect, an embodiment of the present application provides an image combining apparatus, including: a free-form surface prism and a curved super-surface;
the curved super-surface comprises: a plurality of super-surface structure units disposed on the curved side of the freeform prism;
each super-surface structure unit in the plurality of super-surface structure units can perform phase compensation on light rays penetrating through each super-surface structure unit; the incident direction of the light rays emitted to the curved-surface super surface is the same as the emergent direction of the light rays after sequentially penetrating through the super-surface structure unit and the free-form surface prism.
In a second aspect, embodiments of the present application provide a near-eye projection display device, including the image combining apparatus described in the first aspect.
In the embodiments of the present application, in the solutions provided in the first aspect to the second aspect, the super-surface structure unit in the curved super-surface that is disposed in the image combination apparatus performs phase compensation on the light, so that the incident direction of the light that is emitted to the compensation element is the same as the emitting direction of the light that passes through the free-form surface prism, and compared with a mode in which the compensation prism is employed by the image combination apparatus in the related art to perform phase compensation on the light that enters the free-form surface prism, the compensation prism is replaced by the curved super-surface, because the curved super-surface has a smaller thickness and is disposed on the free-form surface on the side where the free-form surface prism receives ambient light, the thickness of the image combination apparatus is reduced to the maximum extent, and the image combination apparatus can be applied to a near-eye projection display device, thereby being capable of implementing lightness and thinness of the near-eye projection display device, and being convenient for a user to use.
In order to make the aforementioned objects, features and advantages of the present application comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating an image combination apparatus provided in an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating light rays passing through a free-form surface prism in an image combining apparatus provided in an embodiment of the present application;
FIG. 3 is a diagram illustrating an example of the phase variation generated by light propagating through an image combining device in an image combining device according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram illustrating a curved super-surface structure of an image assembly provided in an embodiment of the present application;
FIG. 5 is a schematic diagram illustrating a super-surface structure unit for phase modulation of incident light in an image combination apparatus provided in an embodiment of the present application
FIG. 6 is a schematic diagram showing a super-surface structure unit in an image combination device provided in an embodiment of the present application;
FIG. 7 is a schematic diagram of an image combination apparatus with a curved super-surface filled with filler according to an embodiment of the present disclosure;
fig. 8 is a schematic structural view showing an image combining apparatus having a protective lens in an image combining apparatus provided in an embodiment of the present application;
fig. 9 shows a schematic structural diagram of a near-eye projection display device using AR glasses as an example according to an embodiment of the present application.
An icon: 10. a free-form surface prism; 11. a transmissive surface; 12. penetrating the reverse side; 13. a light splitting surface; 20. curved super-surface; 30. an image source; 201. a flexible curved transparent substrate; 202. a nanostructure; 40. a first phase plane; 50. a second phase plane; 60. a filler; 70. protecting the lens; 72. a fixing member; 100. a near-eye projection display device; 102. an image combining device; m, imaging light; A. a light ray A; B. a light ray B; C. a light ray C; D. a light ray D; E. ambient light E; F. a light ray F; G. and a ray of light G.
Detailed Description
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus are not to be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
At present, AR is a technology for skillfully fusing virtual information and real world scenes. The user can view the real scene image after being enhanced by the virtual information by using AR equipment such as AR glasses. AR glasses are bulky and heavy, and wearing comfort of the AR glasses is greatly influenced.
Based on this, the application provides an image combination device and near-eye projection display equipment, carry out phase compensation to light through the super surface structure unit in the curved surface super surface that sets up in image combination device, make the incident direction of the light of directive compensation component, with the emergent direction behind this light sees through the free-form surface prism the same, utilize the curved surface super surface to replace the compensation prism, because the thickness of curved surface super surface is less, and set up on the free-form surface of free-form surface prism receipt light one side, furthest has reduced the thickness of image combination device, this image combination device can be applied to near-eye projection display equipment, thereby can realize the frivolousization of near-eye projection display equipment, convenience of customers uses.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
Examples
Referring to a schematic structural diagram of an image combining apparatus shown in fig. 1, the present embodiment provides an image combining apparatus, including: a freeform prism 10 and a curved super-surface 20.
The curved super-surface comprises: a plurality of super-surface structure units disposed on the curved side of the freeform prism. The curved side surface is a free-form surface on the side of the free-form surface prism for receiving the light rays. The light ray includes: ambient light.
Each super-surface structure unit in the plurality of super-surface structure units can perform phase compensation on light rays penetrating through each super-surface structure unit; the incident direction of the light rays emitted to the curved-surface super-surface 20 is the same as the emergent direction of the light rays after sequentially penetrating through the super-surface structure unit and the free-form surface prism 10.
The free-form surface prism is a prism for imaging, in order to form an enlarged image, at least one surface of the free-form surface prism is a free-form surface, and when light directly penetrates through the free-form surface prism, the propagation direction can be changed, so that imaging deformation (optical aberration) is caused.
In this embodiment, the curved-surface super-surface performs phase compensation on the light incident on the curved-surface super-surface through the super-surface structure unit therein, so that the incident direction of the light incident on the curved-surface super-surface is the same as the emergent direction of the light after the light penetrates through the super-surface structure unit and the free-form surface prism. As shown in fig. 1, a light ray a is incident on a curved super-surface in an image combining device, and a corresponding super-surface structure unit in the curved super-surface compensates the phase of the light ray a and converts the light ray a into a light ray B; in general, the propagation directions of the light ray a and the light ray B are different. And then, converting the light ray B into a light ray C after entering the free-form surface prism, wherein the propagation direction of the light ray B is different from that of the light ray C, the light ray C is converted into a light ray D after exiting the free-form surface prism, the light ray D is the light ray of the light ray A after passing through the curved surface super-surface and the free-form surface prism, and the propagation direction of the light ray D is the same as that of the light ray A.
Based on the image combination device, a user can normally watch images formed by the free-form surface prism, can normally watch an external environment, and can realize an augmented reality effect.
The image combination device comprising the curved-surface super-surface and the free-form surface prism is an afocal system, and can not cause the distortion of ambient light. Based on the image combination device, the user can normally watch the image formed by the free-form surface prism 10, can normally watch the external environment, and can realize the effect of augmented reality.
The image combining device may also include an image source 30 that emits imaging light directed toward the freeform prism.
Referring to fig. 2, a schematic diagram of the image combining apparatus proposed in the present embodiment is shown, in which light passes through a free-form surface prism, the free-form surface prism includes a transmission surface 11, a transflective surface 12, and a light splitting surface 13 (i.e., the curved side surface mentioned above); the light splitting surface is a free curved surface provided with a curved super surface. The transmission surface is used for transmitting imaging light rays emitted by an external image source, and the imaging light rays transmitted by the transmission surface are emitted to the reverse transmission surface; the transmitting surface totally reflects the imaging light transmitted by the transmitting surface to the light splitting surface; the light splitting surface is used for reflecting the imaging light totally reflected by the transmission back surface to the transmission back surface; the reverse transmitting surface is also used for transmitting the imaging light reflected by the light splitting surface.
In one embodiment, the transflective surface may be a concave spherical surface.
As shown in fig. 2, the imaging light M emitted from the image source 30 can be directed to the transmission surface of the freeform prism. The imaging light M penetrates through the transmission surface, then enters the transflective surface at a larger incident angle, and is totally reflected at the transflective surface, so that the imaging light M is totally reflected to the light splitting surface. The light splitting surface has non-reflection and transmission functions, for example, the light splitting surface is provided with a semi-transparent and semi-reflective film which can reflect at least part of the imaging light M; the imaging light rays M reflected by the light splitting surface can finally enter the transflective surface again at a small incident angle, and then penetrate the transflective surface to irradiate towards human eyes. And external ambient light E can also be emitted to human eyes after penetrating through the curved super-surface, the light splitting surface and the reverse surface.
For example, the light splitting surface and the curved super surface can be attached together in a gluing mode; if the refractive indexes of the free-form surface prism and the curved surface super-surface are the same, the adopted glue is similar to the refractive indexes of the free-form surface prism and the curved surface super-surface; for example, the error between the refractive index of the glue and the refractive index of both does not exceed 0.1.
In addition, since the light splitting surface can reflect and transmit light, external ambient light a can also be partially reflected when passing through the light splitting surface, that is, the light splitting surface reflects part of the ambient light; in order to ensure that the human eye can see the external environment at normal brightness, the splitting surface needs to have sufficient transmittance. In this embodiment, the inverse transmittance ratio (i.e., the ratio of transmittance to reflectance) of the light splitting surface is not less than (IMAx-I0)/I0; wherein IMAx is the maximum brightness of the external imaging light, and I0 is the maximum brightness required for imaging. In general, the inverse transmission ratio is greater than 1, i.e., the splitting plane transmits more light than reflects.
In order to realize the image combination device, referring to the schematic diagram of fig. 3 that the light rays propagate through the image combination device to generate the phase variation, it is found through research that the light rays propagate through the image combination device to generate the phase variation; the phase variation amount includes: the sum of the phase compensation quantity generated when the light passes through the super-surface structure unit and a plurality of phase delays generated in the process that the light penetrates through the free-form surface prism. And the difference value between the phase variation generated after the light rays incident to different positions of the image combination device are respectively transmitted by the image combination device is the phase difference
The phase difference is constant.
Specifically, if the light passes through two ends of the transmission surface, two planes perpendicular to the incident direction and the emergent direction of the light are respectively made, and the two planes are used as two phase surfaces for generating phase variation after the light is transmitted by the image combination device; of the two phase planes, the side closer to the curved super surface is the first phase plane 40, and the side farther from the curved super surface is the second phase plane 50.
Then, the amount of phase change generated by the light passing through the image combining device satisfies the following formula 1:
wherein (x) 0 ，y 0 ) Representing the position coordinate, psi ', of the ith super-surface structure unit on the curved super-surface' i A first phase delay, Ψ "", generated before said ray enters said freeform prism i Psi 'generated by the propagation of the light ray through the freeform prism' i A third phase delay is generated after the light rays are emitted from the free-form surface prism,
the phase compensation quantity of the ith super-surface structure unit on the curved super-surface to the incident ray is generated,
the phase difference is the phase variation generated by the light passing through the ith super-surface structure unit on the curved super-surface, and the difference between the phase variations generated by the light entering different positions of the image combination device after being respectively transmitted by the image combination device meets the following formula
Formula 2:
wherein,
the phase variation quantity generated when the light passes through the jth super-surface structure unit on the curved super-surface is obtained,
is a phase difference, and n is an integer.
Here, the first phase lag represents a phase lag amount generated when the light passes through the curved super-surface and other substances having two or more phases while propagating between the first phase plane and the splitting plane of the free-form surface prism; the second phase delay represents the phase delay generated when the light ray propagates in the free-form surface prism; the third phase delay represents a phase delay amount generated when a light ray passes through a substance having two-phase or multi-directivity while propagating between the transmission-side surface and the second phase surface of the free-form surface prism.
In one embodiment, the light is in the visible band and the light includes at least yellow, green, red, and violet light.
Specifically, referring to the schematic structural diagram of the curved super surface shown in fig. 4, the super surface structural unit includes: a flexible curved transparent substrate 201 and nanostructures 202.
The nano structure is arranged on the flexible curved surface transparent substrate, and the shape of the flexible curved surface transparent substrate is matched with that of the curved side surface.
Here, as shown in fig. 4, the light splitting surfaces of the free-form surface prism are generally free-form surfaces, and the light splitting surfaces are matched with the shape of the flexible curved surface transparent substrate of the curved surface super surface, that is, the flexible curved surface transparent substrate of the curved surface super surface is matched with the shape of the curved side surface, and is in the shape of a free-form surface; so that the free-form surface prism and the flexible curved surface transparent substrate of the curved surface super surface can be attached together.
Further, the height direction of the nano structure is parallel to the normal direction of the flexible curved surface transparent substrate where the nano structure is located. Then, for the phase design of the nano structure, the light wave vector incident to the nano structure needs to be projected on the plane where the normal of the flexible curved transparent substrate where the nano structure is located, so as to design the nano structure.
Therefore, referring to the schematic diagram of fig. 5 that the super-surface structure unit performs phase modulation on incident light, for light incident on the nano-structure in each super-surface structure unit, the nano-structure can perform phase compensation on at least part of light F in the incident light E, where the incident direction of the light F is parallel to the normal direction of the flexible curved transparent substrate on which the nano-structure is located. And at least part of light rays G with the incident direction perpendicular to the normal direction of the flexible curved surface transparent substrate on which the nano structure is positioned are not subjected to phase compensation.
In one embodiment, the light ray F may be a light ray component of the light ray E, the incident direction of which is parallel to the normal direction of the flexible curved transparent substrate on which the nano-structures are located; the light ray G may be a light ray component of the light ray E, in which an incident direction is perpendicular to a normal direction of the flexible curved transparent substrate on which the nanostructure is located.
Referring to the schematic structural diagram of the super-surface structure unit shown in fig. 6, each super-surface structure unit can modulate incident light, and the nano structure can directly adjust and control characteristics of light such as phase; in this embodiment, the nanostructure is an all-dielectric structural unit, which has high transmittance at least in the visible light band, and the selectable materials include: titanium oxide, silicon nitride, fused silica, aluminum oxide, gallium nitride, gallium phosphide, hydrogenated amorphous silicon, and the like. The plurality of nano structures are arranged in an array, so that super-surface structure units can be divided; the super-surface structure unit can be a regular hexagon, a square, a fan and the like, and a nano structure is respectively arranged at the central position of each super-surface structure unit or the central position and the vertex position of each super-surface structure unit. All the nanostructures may be located on the same side of the flexible curved-surface transparent substrate, or a part of the nanostructures is located on one side of the flexible curved-surface transparent substrate, and another part of the nanostructures is located on the other side of the flexible curved-surface transparent substrate, which is not limited in this embodiment.
It should be noted that the flexible curved transparent substrate is an integral layer structure, and the plurality of super-surface structure units in the curved super-surface may be artificially divided, that is, a plurality of nanostructures are arranged on the flexible curved transparent substrate, so that the super-surface structure unit including one or more nanostructures may be divided, or the plurality of super-surface structure units may form the curved super-surface of the integrated structure.
Optionally, the super-surface structure unit may further include: and (5) micro-nano structure. The micro-nano structure is arranged on the curved side face.
The period and the size of the micro-nano structure. The shape and the materials used are similar to those described for the nanostructures and are not described in detail here.
In order to protect the nanostructures in the curved super surface, refer to the structural schematic diagram of the image assembly apparatus shown in fig. 7, in which the curved super surface is filled with fillers, and fillers 60 are filled between the nanostructures of the curved super surface.
In one embodiment, the filler may be made of a transparent material such as air or silicon nitride, and it should be noted that the absolute value of the difference between the refractive index of the filler and the refractive index of the nanostructure is greater than or equal to 0.5.
In addition to protecting the nanostructures with fillers, referring to the schematic structural diagram of the image combining device with protective lens shown in fig. 8, the image combining device proposed by this embodiment further includes: a fixture 72 and a protective lens 70.
The light incident side of the curved surface super-surface is provided with the protective lens, one end of the fixing piece is connected with the curved surface super-surface, and the other end of the fixing piece is connected with the protective lens.
The fixing piece can be used for fixing and supporting the protective lens.
The image combining device with a protective lens shown in fig. 8 is only an example, and in the case of a protective lens, the nanostructures on the curved super surface can be protected without filling the nanostructures with filler, i.e. only the protective lens is used.
In the image combining device provided by this embodiment, the super-surface structure unit of the curved super-surface can perform phase compensation on the light, so that the incident direction of the light emitted to the image combining device is the same as the emergent direction of the light after the light passes through the curved super-surface and the free-form surface prism, and thus the light can pass through the curved super-surface and the free-form surface prism without focusing and distortion, and human eyes can normally watch external things after passing through the curved super-surface and the free-form surface prism; moreover, the thickness of the curved-surface super-surface is smaller, so that the curved-surface super-surface and the free-form surface prism can form an afocal and thin image combination device, thereby realizing lightness and thinness and facilitating the use of users. And a proper super-surface structure unit is selected based on the minimum error condition, so that the curved super-surface has a higher phase compensation effect.
The curved-surface super-surface with a free-form surface shape proposed in this embodiment can be obtained by using an existing processing method of a curved-surface substrate super-surface, and will not be described herein again.
Referring to a schematic structural diagram of a near-eye projection display device illustrated in fig. 9 and taking AR glasses as an example, an embodiment of the present invention further provides a near-eye projection display device 100, which includes the image combining apparatus 102 as described above (the dot matrix area in fig. 9 is the image combining apparatus). Based on the near-eye projection display device, human eyes can see images formed by image sources, and can normally view the external environment. Here, "near-to-eye" means that the display device is close to the human eye, and the distance between the display device and the human eye is generally less than 10 cm, and may be generally 1 to 3 cm.
In summary, the present embodiment provides an image combining apparatus and a near-eye projection display device, where a super-surface structure unit in a curved super-surface of the image combining apparatus performs phase compensation on light, so that an incident direction of the light that is incident on a compensation element is the same as an exit direction of the light after the light passes through a free-form surface prism, and compared with a mode in which a compensation prism is used by the image combining apparatus in the related art to perform phase compensation on light entering the free-form surface prism, the curved super-surface is used to replace the compensation prism.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the modifications or alternative solutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (14)
1. An image combining apparatus, comprising: a free-form surface prism and a curved super-surface;
the curved super-surface comprises: a plurality of super-surface structure units disposed on curved sides in the freeform prisms; the curved side surface is a free-form surface on the side of the free-form surface prism for receiving the light;
each super-surface structure unit in the plurality of super-surface structure units can perform phase compensation on light rays penetrating through each super-surface structure unit; the incident direction of the light rays emitted to the curved-surface super surface is the same as the emergent direction of the light rays after sequentially penetrating through the super-surface structure units and the free-form surface prisms.
2. The image combining device of claim 1, wherein the light beam has a phase variation after propagating through the image combining device; the difference value between the phase variation generated after the light rays incident to different positions of the image combination device are respectively transmitted by the image combination device is phase difference
The phase difference is constant.
3. The image combining apparatus according to claim 2, wherein the phase change amount includes: the sum of the phase compensation quantity generated when the light passes through the super-surface structure unit and a plurality of phase delays generated in the process that the light penetrates through the free-form surface prism.
4. The image combining device of claim 3, wherein the amount of phase change of the light passing through the image combining device satisfies the following formula:
wherein (x) 0 ，y 0 ) Representing the position coordinates, Ψ, of the ith super-surface structure unit on the curved super-surface i ' is a first phase delay, Ψ, generated before the ray enters the freeform prism (10) i "is the second phase delay, Ψ, generated by the propagation of said ray through said freeform prism (10) i ' is a third phase delay generated after the light ray is emitted from the free-form surface prism (10),
the phase compensation quantity of the ith super-surface structure unit on the curved super-surface to the incident light is generated,
the phase difference between the phase variation generated by the light passing through the ith super-surface structure unit on the curved super-surface and the phase variation generated by the light entering different positions of the image combination device after being respectively transmitted by the image combination device satisfies the following formula:
wherein,
the phase variation quantity generated when the light rays pass through the jth super-surface structure unit on the curved super-surface is obtained,
is a phase difference, and n is an integer.
5. The image combining apparatus of claim 1, wherein the light is in the visible wavelength band.
6. The image combining apparatus of claim 5, wherein the light rays comprise at least yellow, green, red, and violet light.
7. The image combining apparatus of claim 1, wherein the super surface structure unit comprises: a micro-nano structure;
the micro-nano structure is arranged on the curved side face.
8. The image combining device of claim 1, wherein the super-surface structure unit comprises: a flexible curved transparent substrate and a nanostructure;
the nano structure is arranged on the flexible curved surface transparent substrate, and the shape of the flexible curved surface transparent substrate is matched with that of the curved side surface.
9. The image assembly of claim 8, wherein the height direction of the nanostructures is parallel to the normal direction of the flexible curved transparent substrate on which the nanostructures are located.
10. The image assembly of claim 9, wherein the nanostructures are capable of phase-compensating at least some of the incident light rays parallel to the normal direction of the flexible curved transparent substrate on which the nanostructures are disposed.
11. The image combining apparatus according to any one of claims 1 to 10, further comprising: a fixing member and a protective lens;
the light incident side of the curved surface super-surface is provided with the protective lens, one end of the fixing piece is connected with the curved surface super-surface, and the other end of the fixing piece is connected with the protective lens.
12. The image combining apparatus of any one of claims 1-10, wherein there is a filler filling between the nanostructures of the curved super surface.
13. The image combining apparatus according to any one of claims 1 to 10, further comprising: an image source;
the image source is used for emitting imaging light rays emitted to the free-form surface prism.
14. A near-eye projection display device comprising the image combining apparatus of any one of claims 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221771467.2U CN217639769U (en) | 2022-07-11 | 2022-07-11 | Image combination device and near-to-eye projection display equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221771467.2U CN217639769U (en) | 2022-07-11 | 2022-07-11 | Image combination device and near-to-eye projection display equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217639769U true CN217639769U (en) | 2022-10-21 |
Family
ID=83632636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221771467.2U Active CN217639769U (en) | 2022-07-11 | 2022-07-11 | Image combination device and near-to-eye projection display equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217639769U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116088086A (en) * | 2023-03-02 | 2023-05-09 | 福州京东方光电科技有限公司 | Optical waveguide and near-to-eye display device |
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
| US12140778B2 (en) | 2019-07-02 | 2024-11-12 | Metalenz, Inc. | Metasurfaces for laser speckle reduction |
-
2022
- 2022-07-11 CN CN202221771467.2U patent/CN217639769U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
| US12140778B2 (en) | 2019-07-02 | 2024-11-12 | Metalenz, Inc. | Metasurfaces for laser speckle reduction |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
| CN116088086A (en) * | 2023-03-02 | 2023-05-09 | 福州京东方光电科技有限公司 | Optical waveguide and near-to-eye display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217639769U (en) | Image combination device and near-to-eye projection display equipment | |
| US11988839B2 (en) | Augmented reality apparatus and optical system therefor | |
| US10955676B2 (en) | Head mounted imaging apparatus with optical coupling | |
| US9671614B2 (en) | See-through eyepiece for head wearable display | |
| US8743464B1 (en) | Waveguide with embedded mirrors | |
| US8294994B1 (en) | Image waveguide having non-parallel surfaces | |
| JPH11508373A (en) | Headgear display system | |
| US9389422B1 (en) | Eyepiece for head wearable display using partial and total internal reflections | |
| US20220317448A1 (en) | AR Optical System and AR Display Device | |
| CN114127596A (en) | Display waveguide with high index portion | |
| CN113934005A (en) | Relay redirector, display device and near-to-eye display system | |
| CN111448505B (en) | Near-to-eye system with polarizing waveguide | |
| CN211236457U (en) | Optical module and augmented reality device | |
| JP6417657B2 (en) | Virtual image display device | |
| JP7441443B2 (en) | Optical systems and mixed reality devices | |
| CN215116991U (en) | Augmented reality display system and augmented reality display equipment | |
| US20230011557A1 (en) | Display device | |
| CN210166569U (en) | Augmented reality optical system based on free-form surface and optical waveguide | |
| CN117441123A (en) | Near-eye display system with multiple in-coupling for waveguide display | |
| WO2021148892A1 (en) | Light guide and virtual-image display device | |
| KR20030024021A (en) | Head Mount Display | |
| CN215375955U (en) | Optical module, near-to-eye display system and near-to-eye display equipment | |
| CN112505920A (en) | Miniaturized short-distance optical system | |
| CN110286490A (en) | Augmented reality optical system based on free form surface and optical waveguide | |
| CN111103693A (en) | Optical module and augmented reality device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |