TW202300880A - Apparatus and method for detecting stray light - Google Patents

Abstract

The present invention provides an apparatus and a method for detecting stray light of a camera. The apparatus includes a light source holder; a light source; a photosensitive holder; a photosensitive element, and a processor. The light source emits collimating light. A driver of the photosensitive holder drives a holder and the photosensitive element move towards or away from the camera. The processor determines whether any stray light exist in the camera according to spot forms in images captured by the photosensitive element. The images may precisely reflect an imaging quality of the camera, the spots in the images may precisely reflect where the stray light exists in the camera and a position and direction of the stray light, which may prevent subjective erroneous judgements by the operators.

Description

Device and method for detecting stray light

The technical field of stray light detection of the present invention, in particular relates to a stray light detection device and method.

With the development of the times and the progress of society, people's requirements for the imaging quality of mobile phones, computers, cameras, surveillance and other camera devices are constantly improving, and thus the requirements for the accuracy of the most core optical lenses are also getting higher and higher.

However, after the lens is assembled, due to the dimensional tolerances of the materials used, surface roughness, surface reflection and refraction, the feasibility of matching each material part, assembly procedures and capabilities, etc., there will be complications that are not expected by the design evaluation device. astigmatism.

The existing stray light detection method is: in a dark room, the inspector holds the lens, and then uses a flashlight to illuminate the lens at different angles to detect whether there is stray light. However, the light beam emitted by the flashlight is not a parallel beam. The light beam emitted by the flashlight passes through the lens and is captured by the photosensitive element to form an image. Due to the influence of the non-parallel light beam emitted by the flashlight, the light spots formed on the image are difficult to accurately reflect the position of the lens. Which direction has stray light, there will be deviations in the position where the stray light is generated by the lens through the spot analysis. It is difficult for inspectors to detect stray light by holding a lens and a flashlight so that the light beam emitted by the flashlight passes through the lens and forms a focus on the photosensitive element. The image formed by the photosensitive element cannot accurately reflect the imaging quality of the lens. The light spots on the image formed by the photosensitive element will also have certain deviations, which will further lead to deviations in the position of the stray light generated by the lens through the light spot analysis, which will lead to misjudgment of the cause of the stray light and reduce the imaging quality of the lens.

In view of the above, it is necessary to provide a stray light detection device and method to solve the above problems.

An embodiment of the present application provides a stray light detection device for detecting stray light on a lens, the device comprising:

a rack having a track, the lens is placed on the rack;

a light source bearing element is slidably arranged on the track;

The light source element is slidably arranged on the light source carrying element for emitting collimated light beams. When the light source element and the light source carrying element slide along the track, the collimated beam emitted by the light source element The light beam is always directed towards said lens;

The photosensitive bearing assembly includes a photosensitive driving part and a photosensitive supporting part, the photosensitive driving part is arranged on the frame, and the photosensitive supporting part is connected to the output end of the photosensitive driving part;

The photosensitive element is arranged on the photosensitive carrier and is located on the image side of the lens, and the photosensitive driving part is used to drive the photosensitive carrier and the photosensitive element to move toward or away from the lens, so that The photosensitive element acquires the collimated light beam passing through the lens and forms an image; and

a processing unit, connected to the photosensitive element, for receiving the image captured by the photosensitive element, and judging whether the lens generates the stray light according to the shape of the light spot on the image, and according to the light source element The generation direction of the stray light is judged relative to the angle of the lens.

In some embodiments, the light source assembly includes:

a light emitting element for emitting light; and

A collimating element is arranged on the optical path of the light emitted by the light emitting element, and is used to collimate the light to form the collimated light beam;

Wherein, at least one of the light emitting element and the collimating element is slidably arranged on the light source carrying component.

In some embodiments, the device further includes a lens carrying element, and the lens carrying assembly includes:

a lens support, arranged on the frame;

a lens driving part arranged on the lens supporting part; and

A lens carrier, connected to the output end of the lens driver, for carrying the lens, and the lens driver is used to drive the lens carrier and the lens to move in a direction approaching or away from the photosensitive element .

In some embodiments, the track is an arc-shaped slot passing through the frame.

In some embodiments, the arc-shaped slot is a semicircular arc-shaped slot.

In some embodiments, the light source carrying assembly includes:

A rotating member is rotatably arranged on the frame along a rotation axis;

A swing member, one end of the swing member is connected to the rotating member, and the other end of the swing member extends away from the rotating member and protrudes from the frame;

a locking piece, slidably arranged on the track and connected to the swinging piece, for driving the swinging piece to slide along the track, and for locking the swinging piece on the frame; and

The light source carrying part is slidably arranged on the swinging part, and is used for carrying the light source assembly.

In some embodiments, the light source carrying assembly further includes:

The swing driving part is connected with the rotating part and is used to drive the rotating part to rotate along the rotation axis.

In some embodiments, the light source carrying assembly further includes:

The light source driving part is arranged on the swinging part and connected with the light source carrying part, and is used to drive the light source carrying part and the light source assembly to move along the extending direction of the swinging part.

In some embodiments, the lock includes:

a stopper, arranged on a side of the track away from the swing member, the outer diameter of the stopper is greater than the radial width of the track; and

A rotating part, one end of the rotating part is fixedly connected to the stop part, and the other end of the rotating part passes through the track and is rotatably connected to the swinging member, so as to drive the stop part toward or away from the stopper direction of the track, so that the stopper and the swinging member clamp or loosen the track.

An embodiment of the present application also provides a stray light detection method for detecting stray light on a lens, the method comprising:

providing a stray light detection device as described above;

placing the lens in the rack;

adjusting the light source element so that the light source element emits the collimated light beam;

adjusting the photosensitive driving element so that the collimated light beam passing through the lens forms a focus on the photosensitive element;

moving the light source carrying element and the light source element in the track, so that the light source element emits the collimated light beam in different directions to the lens;

The photosensitive element acquires the collimated light beams passing through the lens in different directions to form a plurality of the images;

The processing unit receives a plurality of the images captured by the photosensitive element;

The processing unit judges whether the lens generates the stray light according to the shape of the light spots on the plurality of images, and judges the direction of the stray light according to the angle of the light source element relative to the lens.

In the above stray light detection device and method, the light beam emitted by the light source element is a collimated light beam. The collimated light beam can pass through the lens at an exact incident angle and be captured by the photosensitive element to form an image. The light spot formed on the image can accurately reflect where the lens is. The direction has stray light. On this basis, analyzing the direction of the stray light generated by the lens through the spot analysis can avoid misjudgment of the cause of the stray light. Drive the photosensitive carrier and the photosensitive element to move toward or away from the lens through the photosensitive driver, so that the collimated light beam passing through the lens can form a focus on the photosensitive element, so that the image formed by the photosensitive element can accurately reflect the imaging quality of the lens , on this basis, analyzing the position of the stray light generated by the lens through the light spot can avoid misjudgment of the cause of the stray light, which is conducive to improving the yield rate and imaging quality of the lens.

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, are only for explaining the present application, and should not be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present application, it should be noted that "plurality" means two or more, unless otherwise specifically defined.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other, can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include the first feature being in direct contact with the second feature, and may also include the first feature and the second feature. Two features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the level of the first feature is higher than that of the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the level height of the first feature is smaller than that of the second feature.

The following disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and arrangements of specific examples are described below. Of course, they are examples only and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or reference letters in different instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed.

The application provides a stray light detection device for detecting stray light on a lens. The stray light detection device includes a frame, a light source bearing element, a light source element, a photosensitive bearing element, a photosensitive element and a processing unit. The frame has a track, and the lens is placed on the frame; the light source carrying element is slidably arranged on the track; the light source element is slidably arranged on the light source carrying element for emitting collimated light beams, and the light source element and the light source carrying element slide along the track , the collimated light beam emitted by the light source element is always directed towards the lens; the photosensitive bearing assembly includes a photosensitive driver and a photosensitive carrier, the photosensitive driver is arranged on the frame, and the photosensitive carrier is connected to the output end of the photosensitive driver; the photosensitive element is arranged on the photosensitive The carrier is located on the image side of the lens, and the photosensitive driving part is used to drive the photosensitive carrier and the photosensitive element to move toward or away from the lens, so that the photosensitive element acquires the collimated light beam passing through the lens and forms an image; the processing unit and the described The photosensitive element is connected to receive the image captured by the photosensitive element, judge whether the lens generates stray light according to the shape of the spot on the image, and judge the direction of the stray light according to the angle of the light source element relative to the lens.

In the above-mentioned stray light detection device, the beam emitted by the light source element is a collimated beam, and the collimated beam can be incident on the lens at an exact incident angle. The corner of the lens passes through the lens and is captured by the photosensitive element to form an image. The light spots formed on the image can accurately reflect in which direction the lens has stray light. The cause of stray light produces misjudgment. Drive the photosensitive carrier and the photosensitive element to move toward or away from the lens through the photosensitive driving part, and the distance between the photosensitive element and the lens can change, so that the collimated light beam passing through the lens can form a focus on the photosensitive element, and the photosensitive element The quality of the formed image is high, so that the image formed by the photosensitive element can accurately reflect the imaging quality of the lens, and the light spot can accurately reflect the position of stray light on the lens. On this basis, the position of stray light generated by the lens is analyzed through the light spot. Misjudgment of the cause of stray light can be avoided, which is conducive to improving the yield rate and imaging quality of the lens.

The present application also provides a method for detecting stray light, which is used for detecting stray light on a lens. The method for detecting stray light includes: providing a device for detecting stray light as described above; placing the lens on a frame; adjusting the light source element so that The light source element emits a collimated beam; adjust the photosensitive driver so that the collimated beam passing through the lens forms a focus on the photosensitive element; move the light source carrying element and the light source element in the track to make the light source element emit collimation in different directions to the lens light beam; the photosensitive element obtains collimated light beams passing through the lens in different directions to form multiple images; the processing unit receives the multiple images acquired by the photosensitive element; the processing unit judges whether the lens produces stray light according to the spot shape on the multiple images, and The generation direction of the stray light is judged according to the angle of the light source element relative to the lens.

In the above stray light detection method, the lens is placed on the frame of the stray light detection device, the light source element is adjusted to emit a collimated light beam, and the photosensitive drive is adjusted so that the collimated light beam passing through the lens forms a focus on the photosensitive element, and the light emitted by the light source element The collimated beam passes through the lens at an exact incident angle and is captured by the photosensitive element to form an image. The light spot formed on the image can accurately reflect the direction in which the lens has stray light. On this basis, the lens produces stray light through the light spot on the image. The direction of astigmatism can avoid misjudgment of the cause of stray light. The collimated light beam passing through the lens can form a focus on the photosensitive element. The image quality formed by the photosensitive element is high, so that the image formed by the photosensitive element can accurately reflect the imaging quality of the lens, and the light spot can accurately reflect the stray light generated on the lens. On this basis, analyzing the position of the stray light generated by the lens through the light spot can avoid misjudgment of the cause of the stray light, which is conducive to improving the yield rate and imaging quality of the lens.

Referring to FIG. 1 , an embodiment of the present application provides a stray light detection device 100 for detecting stray light on a lens 200 . Wherein, the lens 200 includes at least one lens (not shown). The stray light detection device 100 includes a frame 10 , a lens carrying element 20 , a light source carrying element 30 , a light source element 40 , a photosensitive carrying element 50 , a photosensitive element 60 and a processing unit 70 .

In this embodiment, the frame 10 includes a base plate 14 and a support 16 connected to the base plate 14, the base plate 14 and the support 16 are generally plate-shaped, the base plate 14 is vertically connected to the support 16, and the lens carrying element 20 and the photosensitive carrying element 50 are arranged on On the substrate 14 , the light source bearing assembly 30 is disposed on the bracket 16 , and a track 12 is formed on the bracket 16 .

Understandably, in other embodiments, the substrate 14 and the bracket 16 may also be connected in parallel or at a certain angle.

In this embodiment, the frame 10 further includes four outriggers 18 , which are evenly arranged on the side of the substrate 14 away from the support 16 , for supporting the substrate 14 . The outrigger 18 can be screwed on the side of the substrate 14 away from the support 16 , so that the stray light detection device 100 can be placed on an uneven surface by rotating the outrigger 18 .

Understandably, in other embodiments, the number of legs 18 may also be three, five, six or more. The legs 18 can also be omitted.

The track 12 is an arc-shaped slot passing through the bracket 16 , and the light source bearing element 30 slides along the trajectory of the arc-shaped slot.

In one embodiment, the track 12 is a semicircular arc-shaped slot. It can be understood that the light source carrying element 30 performs a rotational movement with the center of the semicircular arc-shaped through groove as the center of a circle. In this way, the distance between the light source element 40 carried on the light source bearing element 30 and the lens 200 can be kept constant, which is beneficial to enable the light source element 40 to emit collimated beams at different angles to enter the lens 200 at the same distance. Based on detecting the stray light of the lens 200 under the same distance condition, the stray light of the lens 200 can be analyzed and judged more comprehensively.

It should be noted that the track 12 is only used to define the movement track of the light source bearing element 30 and the light source element 40 as a semicircle. In this way, the collimated light beam emitted by the light source element 40 can always irradiate the lens 200 , and the distance between the light source element 40 and the lens 200 can remain unchanged. However, the track 12 does not limit that the distance between the light source element 40 and the lens 200 cannot change.

It can be understood that in other embodiments, the track 12 can also be a semi-elliptical arc-shaped slot or other curved arc-shaped slots. In this way, it can still be ensured that the light source element 40 emits collimated light beams incident on the lens 200 at different angles.

In one embodiment, the bracket 16 may also be provided with a scale value (not shown) indicating the angle. In this way, it is beneficial for inspectors to intuitively obtain the incident angle of the collimated beam.

Understandably, when the light source bearing element 30 and the light source element 40 are precisely automated, the scale value on the bracket 16 can be omitted.

Referring to FIG. 2 , the light source carrying assembly 30 includes a rotating member 31 , a swinging member 32 , a locking member 33 , a light source carrying member 34 , a swing driving member 35 and a light source driving member 36 .

The rotating member 31 is roughly cylindrical, and the rotating member 31 has a rotation axis, and the rotating member 31 is rotatably arranged on the support 16 along the rotation axis. It can be understood that the rotation "center" of the light source bearing element 30 is located on the rotation axis; 32 is roughly bar-shaped. One end of the swinging member 32 is connected to the rotating member 31 , and the other end of the swinging member 32 extends away from the rotating member 31 and protrudes from the end of the bracket 16 away from the base plate 14 .

In one embodiment, the rotating member 31 is hingedly connected to the bracket 16 .

The locking member 33 is slidably disposed on the track 12 and connected to the swinging member 32 . The locking piece 33 is connected to the swinging piece 32 and is slidably arranged in the track 12, so that the locking piece 33 can be used to drive the swinging piece 32 to slide along the track 12, and can also be used to lock the swinging piece 32 on the bracket 16, so that the light source carrying assembly 30 is fixed on the bracket 16, so that the incident angle of the collimated light beam emitted by the light source element 40 remains unchanged.

In one embodiment, the locking member 33 includes a stop portion 332 and a rotation portion 334 , the stop portion 332 is substantially circular, and the rotation portion 334 is substantially cylindrical.

The stopper 332 is arranged on the side of the track 12 away from the swing member 32, the outer diameter of the stopper 332 is larger than the radial width of the track 12; Through the track 12 and connected to the swinging member 32 in rotation, the rotating part 334 is connected to the swinging member 32 to drive the stopper 332 to move toward or away from the track 12, so that the stopper 332 and the swinging member 32 are clamped or Release track 12. In this way, the second carrier and the light source element 40 can be fixed on the bracket 16 .

In this embodiment, the locking member 33 may be a screw, the end of the rotating portion 334 away from the stop portion 332 is provided with an external thread, and the swinging member 32 is provided with a corresponding internal thread.

The side of the light source bearing part 34 close to the swinging part 32 is roughly groove-shaped, and is used to cooperate with the swinging part 32 and be slidably arranged on the swinging part 32. The side of the light source bearing part 34 away from the swinging part 32 is roughly planar or Groove-shaped, used to carry the light source assembly 40 . The distance between the light source element 40 and the lens 200 is related to the length of the oscillating member 32 , and the other end of the oscillating member 32 protrudes from the frame 10 . In this way, the length of the swing member 32 is reasonable, and the sliding range of the light source element 40 on the swing member 32 is reasonable, which is beneficial to changing the brightness of the collimated light beam incident on the lens 200 .

The swing driving part 35 is connected with the rotating part 31, and the swing driving part 35 is used to drive the rotating part 31 to rotate along the rotation axis. In this way, the rotating member 31 is driven to rotate along the rotation axis by the swing driving member 35, so that the light source bearing element 30 and the light source element 40 can slide in the track 12 precisely and automatically; And the rotation angle of the light source element 40 is beneficial to accurately obtain the incident angle of the collimated beam.

In one embodiment, the oscillating drive member 35 is a servo motor that can realize forward rotation and reverse rotation. The control precision of the servo motor is high, and the angle rotated by the servo motor can be accurately recorded.

Understandably, in other embodiments, the swing driving member 35 may also be a motor with an encoder or an angle sensor.

Understandably, since the other end of the oscillating member 32 protrudes from the bracket 16 , when the inspector manually toggles the oscillating member 32 , the oscillating driving member 35 can be omitted. However, at this time, there should be devices such as an encoder or an angle sensor capable of recording the angle on the rotating member 31 , or a scale value should be set on the bracket 16 .

The light source driver 36 is disposed on the swing member 32 and connected to the light source carrier 34 . The light source driver 36 is used to drive the light source carrier 34 and the light source assembly 40 to move along the extension direction of the swing member 32 . In this way, the precise automatic sliding of the light source carrier 34 and the light source assembly 40 can be realized through the light source driver 36 , which is beneficial to precise control of the distance between the light source element 40 and the lens 200 .

In one embodiment, the light source driver 36 is a servo motor capable of forward rotation and reverse rotation, and the light source driver 36 is connected to the light source carrier 34 through a rack and pinion, a gear chain, a screw, and the like.

It can be understood that, in other embodiments, the light source driver 36 , the swinging member 32 , and the light source carrier 34 can also be all or part of the structure of a linear module. In this way, the light source driver 36 can still drive the light source carrier 34 and the light source assembly 40 to make linear reciprocating motions along the extending direction of the swinging member 32 .

The light source element 40 includes a light emitting element 42 and a collimating element 44 .

The light emitting element 42 is used to emit light. The light emitting element 42 may be an incandescent lamp, or an element capable of emitting light such as a light emitting diode.

The collimating element 44 is disposed on the optical path of the light emitted by the light emitting element 42 for collimating the light to form a collimated light beam. The collimating element 44 is a collimating mirror, which collimates the light emitted by the light emitting element 42 to form a collimated light beam. In this way, the collimated light beam can be incident on the lens 200 at an exact angle, so as to prevent the light from spreading and affect the judgment of the position and direction of the stray light generated by the lens 200 .

Referring to Fig. 3, the photosensitive element 60 is arranged on the image side of the lens 200, the photosensitive element 60 is roughly rectangular, and the area of the photosensitive element 60 is larger than the area of the lens 200, so that the collimated light beam passing through the lens 200 can be completely captured by the photosensitive element 60 Obtain.

The processing unit 70 is connected to the photosensitive element 60 and disposed adjacent to the photosensitive element 60 . The processing unit 70 is used for receiving the image captured by the photosensitive element 60 , and judging whether the lens 200 generates stray light according to the shape of the light spots on the image, and judging the generation direction of the stray light according to the angle of the light source element 40 relative to the lens 200 . Specifically, the shape of the speckle on the image can be quantified, so that the processing unit 70 can determine whether the lens 200 generates stray light and the direction of the stray light according to the degree of quantization.

It can be understood that, in other embodiments, the processing unit 70 may also be set independently of the stray light detection device 100 .

The photosensitive carrier assembly 50 includes a photosensitive driver 52 and a photosensitive carrier 54 , and the photosensitive carrier 54 is roughly in the shape of a plate. The photosensitive driving element 52 is disposed on the substrate 14 , the output end of the photosensitive driving element 52 is connected to the photosensitive carrier 54 , and the photosensitive element 60 is disposed on the photosensitive carrier 54 . The photosensitive driving part 52 is used to drive the photosensitive carrier 54 and the photosensitive element 60 to move towards or away from the lens 200, so that the collimated light beam passing through the lens 200 forms a focus on the photosensitive element 60, so that the photosensitive element 60 can obtain the light through the lens 200. collimated light beam and form better quality images.

In one embodiment, the photosensitive driving member 52 is an air cylinder.

It can be understood that, in other embodiments, the photosensitive driving member 52 may also be an electric telescopic rod or other devices capable of driving the photosensitive bearing member 54 to perform linear reciprocating motion.

It can be understood that, in other embodiments, the number of the photosensitive driving member 52 can also be two, one of which drives the photosensitive bearing member 54 to run along the first direction, and the other drives the photosensitive bearing member 54 to move along the second direction. The two photosensitive driving members 52 enable the photosensitive carrier 54 to move in a plane formed by two directions. Wherein, the first direction is perpendicular to the second direction, the first direction or the second direction can be a direction parallel to the direction approaching or away from the lens 200, and the first direction and the second direction can also be both close to or away from the lens 200. The direction of 200 is perpendicular to the direction. Certainly, the number of the photosensitive driving member 52 can also be three, so that the photosensitive bearing member 54 and the photosensitive element 60 can move in three directions, which is beneficial to make the photosensitive element 60 capable of better imaging, and then through better imaging The stray light of the lens 200 is detected.

Please refer to FIG. 4 , the lens carrying assembly 20 includes a lens supporting part 22 , a lens driving part 24 and a lens carrying part 26 .

The lens supporter 22 is roughly plate-shaped or column-shaped, and the lens supporter 22 is disposed on the base plate 14 . The lens driver 24 is disposed on the lens support 22 . The lens carrier 26 is roughly in the shape of a plate or a hollow cuboid. The lens carrier 26 is connected to the output end of the lens driver 24. The lens carrier 26 is used to carry or accommodate the lens 200, and the lens driver 24 is used to drive the lens carrier 26. And the lens 200 moves toward or away from the photosensitive element 60 . In this way, when the photosensitive driving member 52 drives the photosensitive element 60 and still cannot satisfy the lens 200 to form a focus on the photosensitive element 60, the lens driver 24 can further drive the lens carrier 26 and the lens 200 to move closer to or away from the photosensitive element 60. The direction of the movement makes the lens 200 focus on the photosensitive element 60, so that the photosensitive element 60 can obtain a better quality image.

It can be understood that the incident point where the collimated light beam enters the lens 200 is approximately at the same height as the "circle center" where the swing member 32 rotates. Certainly, the incident point of the collimated light beam incident lens 200 and the "circle center" that the swing member 32 rotates may not be at the same height, and when the light source element 40 and the swing member 32 rotate, the position of the light source element 40 on the swing member 32 may also be adjusted. The angle is further adjusted so that the light beam emitted by the light source element 40 can still be incident on the lens 200 .

It can be understood that, in other embodiments, the number of lens support members 22 can also be two, the lens carrying member 26 is slidably arranged between the two lens support members 22, and the lens driving member 24 is arranged on one of the lens holders. The support member 22 is connected to the lens carrier 26 . In this way, the lens driving member 24 can still drive the lens carrier 26 and the lens 200 to move toward or away from the photosensitive element 60 .

Understandably, in other embodiments, the lens carrying component 20 may be a part of the frame 10 , that is, the lens 200 is disposed on the frame 10 .

In the stray light detection device 100 provided by the present application, by setting the light source element 40 to emit a collimated beam, the swing member 32 and the light source element 40 can be accurately rotated at a certain angle by the drive part of the swing drive part 35, and the collimated beam can be rotated according to the angle Incident to the lens 200, the incident angle of the collimated beam is clear and the incident angle will not deviate. The collimated beam passes through the lens 200 at the exact incident angle and is captured by the photosensitive element 60 to form an image. The light spots formed on the image can accurately reflect On the basis of which direction the lens 200 has stray light, the direction of the stray light generated by the lens 200 can be analyzed through the light spots on the image, so as to avoid misjudgment of the cause of the stray light. Drive the photosensitive carrier 54 and the photosensitive element 60 to move toward or away from the lens 200 through the photosensitive driver 52, and/or drive the lens carrier 26 and the lens 200 to move toward or away from the photosensitive element 60 through the lens driver 24 , the distance between the photosensitive element 60 and the lens 200 can be changed, so that the collimated light beam passing through the lens 200 can form a focus on the photosensitive element 60, and the image quality formed by the photosensitive element 60 is high, so that the image formed by the photosensitive element 60 It can accurately reflect the imaging quality of the lens 200, and the light spot can accurately reflect the position of the stray light on the lens 200. On this basis, analyzing the position of the stray light generated by the lens 200 through the light spot can avoid misjudgment of the cause of the stray light. It is beneficial to improve the yield rate and imaging quality of the lens 200 . The light source driver 36 drives the light source carrier 34 and the light source assembly 40 to move along the extension direction of the swinging member 32, so that the distance between the light source driver 36 and the lens 200 can be adjusted, which is beneficial to adjust the brightness of the collimated light beam incident on the lens 200 , which is beneficial to improve the imaging quality of the photosensitive element 60 .

Referring to FIG. 5 , an embodiment of the present application further provides a method for detecting stray light, which is used for detecting stray light on the lens 200 . Wherein, the lens 200 includes at least one lens (not shown). The method for detecting stray light in this embodiment includes the following steps.

Step S2: Provide a stray light detection device 100 as in the above embodiment.

Step S4: Place the lens 200 on the lens carrying assembly 20 .

Step S6: adjusting the light source element 40 so that the light source element 40 emits a collimated light beam.

Specifically, the collimation element 44 in the light source element 40 is adjusted to adjust the light emitted by the light emitting element 42 to form a collimated beam.

Step S8 : Adjust the photosensitive driving member 52 so that the collimated light beam passing through the lens 200 forms a focal point on the photosensitive element 60 .

Specifically, the photosensitive carrier 54 and the photosensitive element 60 are driven by the photosensitive driver 52 , so that the distance between the lens 200 and the photosensitive element 60 changes until the collimated light beam of the light-transmitting lens 200 forms a focus on the photosensitive element 60 . In this way, the quality of the image captured by the photosensitive element 60 is high, which is beneficial to accurately reflect the position and direction of the stray light corresponding to the light spot formed on the lens 200 .

Step S10 : moving the light source carrying element 30 and the light source element 40 in the track 12 , so that the light source element 40 emits collimated light beams in different directions to the lens 200 .

Specifically, the rotating member 31 , the rotating member 32 and the light source assembly 40 are driven to rotate along the rotation axis by the swing driving member 35 , so that the light source element 40 can emit collimated light beams in different directions to the lens 200 .

Step S12: The photosensitive element 60 acquires collimated light beams passing through the lens 200 in different directions to form multiple images.

Step S14 : the processing unit 70 receives a plurality of images captured by the photosensitive element 60 .

Step S16: The processing unit 70 judges whether the lens 200 produces stray light according to the shape of the spots on the plurality of images, and judges the direction of the stray light generated by the lens 200 according to the angle of the light source element 40 relative to the lens 200 .

Understandably, if the position and direction of the stray light of the lens 200 are analyzed and judged by inspectors according to the image formed by the photosensitive element 60 , the processing unit 70 can be omitted.

In the stray light detection method provided by the present application, by placing the lens 200 on the lens carrying element 20 of the stray light detection device 100, adjusting the light source element 40 to emit a collimated light beam, and adjusting the photosensitive drive member 52 so that the collimated light beam passing through the lens 200 is A focal point is formed on the photosensitive element 60, and the collimated beam emitted by the light source element 40 passes through the lens 200 at an exact incident angle and is captured by the photosensitive element 60 to form an image. The light spots formed on the image can accurately reflect the direction in which the lens 200 has stray light On this basis, by analyzing the direction of the stray light generated by the lens 200 through the speckle on the image, misjudgment of the cause of the stray light can be avoided. The collimated light beam passing through the lens 200 can form a focus on the photosensitive element 60, and the image quality formed by the photosensitive element 60 is high, so that the image formed by the photosensitive element 60 can accurately reflect the imaging quality of the lens 200, and the light spot can accurately reflect the lens 200 where the stray light is generated, on this basis, analyzing the position of the stray light generated by the lens 200 through the spot analysis can avoid misjudgment of the cause of the stray light, which is conducive to improving the yield rate and imaging quality of the lens 200 . The light source driver 36 drives the light source carrier 34 and the light source assembly 40 to move along the extension direction of the swinging member 32, so that the distance between the light source driver 36 and the lens 200 can be adjusted, which is beneficial to adjust the brightness of the collimated light beam incident on the lens 200 , which is beneficial to improve the imaging quality of the photosensitive element 60 .

It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, but that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, no matter from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the application is defined by the appended claims rather than the above description, so it is intended to All changes within the meaning and range of equivalents of the elements are embraced in this application.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application without limitation. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be Make modifications or equivalent replacements without departing from the spirit and scope of the technical solutions of the present application.

100: Stray light detection device 200: lens 10: Rack 12: track 14: Substrate 16: Bracket 18: outrigger 20: Lens carrying assembly 22: Lens support 24: Lens driver 26: Lens carrier 30:Light source carrying component 31: rotating parts 32: pendulum 33: Locking piece 332: stop part 334: rotating part 34: Light source carrier 35: Swing driver 36: Light source driver 40:Light source component 42: Light emitting element 44: Collimation element 50: photosensitive bearing components 52: photosensitive driver 54: photosensitive carrier 60: photosensitive element 70: Processing unit S2~S16: Steps

FIG. 1 is a schematic plan view of a stray light detection device provided by an embodiment of the present application. FIG. 2 is a schematic plan view of the light source carrying element and the light source element shown in FIG. 1 . FIG. 3 is a schematic plan view of the photosensitive bearing element and the photosensitive element shown in FIG. 1 . FIG. 4 is a schematic plan view of the lens carrying assembly and the lens shown in FIG. 1 . FIG. 5 is a schematic flowchart of a method for detecting stray light provided by an embodiment of the present application.

none.

100: Stray light detection device

200: lens

10: Rack

12: track

14: Substrate

16: Bracket

18: outrigger

20: Lens carrying assembly

22: Lens support

24: Lens driver

26: Lens carrier

30:Light source carrying component

31: rotating parts

32: pendulum

33: Locking piece

34: Light source carrier

35: Swing driver

36: Light source driver

40:Light source component

42: Light emitting element

44: Collimation element

50: photosensitive bearing components

52: photosensitive driver

54: photosensitive carrier

60: photosensitive element

70: Processing unit

Claims (10)

A stray light detection device for detecting stray light on a lens, the improvement of which is that the device includes: a frame with a track, and the lens is placed on the frame; a light source bearing element is slidably arranged on the track; The light source element is slidably arranged on the light source carrying element for emitting collimated light beams. When the light source element and the light source carrying element slide along the track, the collimated beam emitted by the light source element The light beam is always directed towards said lens; The photosensitive bearing assembly includes a photosensitive driving part and a photosensitive supporting part, the photosensitive driving part is arranged on the frame, and the photosensitive supporting part is connected to the output end of the photosensitive driving part; The photosensitive element is arranged on the photosensitive carrier and is located on the image side of the lens, and the photosensitive driving part is used to drive the photosensitive carrier and the photosensitive element to move toward or away from the lens, so that The photosensitive element acquires the collimated light beam passing through the lens and forms an image; and a processing unit, connected to the photosensitive element, for receiving the image captured by the photosensitive element, and judging whether the lens generates the stray light according to the shape of the light spot on the image, and according to the light source element The generation direction of the stray light is judged relative to the angle of the lens. The stray light detection device according to claim 1, wherein the light source element includes: a light emitting element for emitting light; and A collimating element is arranged on the optical path of the light emitted by the light emitting element, and is used to collimate the light to form the collimated light beam; Wherein, at least one of the light emitting element and the collimating element is slidably arranged on the light source carrying component. The stray light detection device according to claim 1, wherein the device further includes a lens carrying component, and the lens carrying assembly includes: a lens support, arranged on the frame; a lens driving part arranged on the lens supporting part; and A lens carrier, connected to the output end of the lens driver, for carrying the lens, and the lens driver is used to drive the lens carrier and the lens to move in a direction approaching or away from the photosensitive element . The stray light detection device according to claim 1, wherein the track is an arc-shaped slot passing through the frame. The stray light detection device according to claim 4, wherein the arc-shaped through groove is a semicircular arc-shaped through groove. The stray light detection device according to claim 4, wherein the light source carrying component includes: A rotating member is rotatably arranged on the frame along a rotation axis; A swing member, one end of the swing member is connected to the rotating member, and the other end of the swing member extends away from the rotating member and protrudes from the frame; a locking piece, slidably arranged on the track and connected to the swinging piece, for driving the swinging piece to slide along the track, and for locking the swinging piece on the frame; and The light source carrying part is slidably arranged on the swinging part, and is used for carrying the light source assembly. The stray light detection device according to claim 6, wherein the light source carrying component further includes: The swing driving part is connected with the rotating part and is used to drive the rotating part to rotate along the rotation axis. The stray light detection device according to claim 6, wherein the light source carrying component further includes: The light source driving part is arranged on the swinging part and connected with the light source carrying part, and is used to drive the light source carrying part and the light source assembly to move along the extending direction of the swinging part. The stray light detection device according to claim 6, wherein the locking member includes: a stopper, arranged on a side of the track away from the swing member, the outer diameter of the stopper is greater than the radial width of the track; and A rotating part, one end of the rotating part is fixedly connected to the stop part, and the other end of the rotating part passes through the track and is rotatably connected to the swinging member, so as to drive the stop part toward or away from the stopper direction of the track, so that the stopper and the swinging member clamp or loosen the track. A method for detecting stray light, which is used to detect stray light on a lens, the improvement is that the method includes: Provide a stray light detection device as described in any one of claims 1-9; placing the lens in the rack; adjusting the light source element so that the light source element emits the collimated light beam; adjusting the photosensitive driving element so that the collimated light beam passing through the lens forms a focus on the photosensitive element; moving the light source carrying element and the light source element in the track, so that the light source element emits the collimated light beam in different directions to the lens; The photosensitive element acquires the collimated light beams passing through the lens in different directions to form a plurality of the images; The processing unit receives a plurality of the images captured by the photosensitive element; The processing unit judges whether the lens generates the stray light according to the shape of the light spots on the plurality of images, and judges the direction of the stray light according to the angle of the light source element relative to the lens.

Images