Optical element performance testing device

Abstract

The utility model relates to an optical element performance testing device which comprises a carrying table, a testing assembly is arranged on the carrying table, the testing assembly comprises a light source, a first diaphragm, a second diaphragm and a CCD camera which are sequentially arranged from front to back from an object side to an image side, and an optical element to be tested is arranged between the second diaphragm and the CCD camera; the aperture of the first diaphragm and the aperture of the second diaphragm are adjustable, and the second diaphragm is arranged at a light inlet of the optical element to be measured; a light spot receiving part is arranged between the to-be-measured optical element and the CCD camera, the light spot receiving part comprises a milky white glue layer and / or a projection amplification assembly, and a gap tau between the front surface of the milky white glue layer and the rear surface of the to-be-measured optical element meets the following condition: tau < 20 [mu] m. According to the utility model, the problem that the test result is influenced by the mutual crosstalk of light spots of each block due to the reception of a small-size multi-block long-distance receiving screen is effectively solved, and the problem of light source adaptation of single-component optical elements in a micro-lens array is solved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of optical performance testing, in particular to an optical element performance testing device. Background Art

[0002] In the field of lighting optics, an optical platform is often built, and a white screen receiver is set up at a distance from the light outlet of the optical element to be tested to record the light spot emitted from the optical system, and then take a picture with a CCD camera to record it. Through image processing, parameters such as uniformity, contrast, and irradiance distribution are extracted and calculated to reflect the uniformity and shaping effects of the optical system. This method is more practical for testing the uniformity performance of the entire plane, but when it is applied to optical elements within the millimeter size and it is necessary to evaluate the uniformity effect of multiple block light spots at the same time, there will be limitations. If the light is not propagated in parallel, as the distance increases, the light spots formed in multiple blocks will gradually interfere with each other, resulting in the light spots on the white screen receiving no longer the expected results.

[0003] In addition, there are combinations in the optical system, such as matching the imaging lens module with the microlens array to achieve the homogenization of multiple field light spots. Generally, in order to examine the optical performance of the microlens array alone, the imaging lens module is omitted. At this time, there is the problem of how to match the test light source with the microlens array. Therefore, it is necessary to establish a suitable platform to make the light source incident in a way close to the imaging module. Utility Model Content

[0004] The utility model aims to solve the above problems and provide an optical element performance testing device which can avoid mutual crosstalk between light spots and realize reasonable matching of microlens array test light sources.

[0005] To achieve the above-mentioned object, the utility model provides an optical element performance testing device, comprising a stage, a testing assembly is arranged on the stage, the testing assembly comprises a light source, a first aperture, a second aperture, and a CCD camera which are arranged in sequence from the object side to the image side from the front to the back, the optical element to be tested is arranged between the second aperture and the CCD camera; the apertures of the first aperture and the second aperture are adjustable, and the second aperture is arranged at the light inlet of the optical element to be tested;

[0006] A light spot receiving part is provided between the optical element to be measured and the CCD camera, the light spot receiving part includes a milky white glue layer and / or a projection magnification part, the projection magnification part includes a projection lens and a projection receiving screen, and a gap τ between the front surface of the milky white glue layer and the rear surface of the optical element to be measured satisfies the following condition: τ<20um.

[0007] According to one aspect of the utility model, the latex glue layer is directly coated on the rear surface of the optical element to be measured.

[0008] According to one aspect of the utility model, the light spot receiving part further includes a glass substrate, and the milky white glue layer is coated on the front surface of the glass substrate and is arranged in close contact with the rear surface of the optical element to be measured.

[0009] According to one aspect of the utility model, the thickness L of the latex glue layer satisfies the following condition: 15um<L<50um.

[0010] According to one aspect of the utility model, the light spot receiving unit includes a projection lens and a projection receiving screen arranged at the front side of the CCD camera, and the projection lens is arranged at the front side of the projection receiving screen.

[0011] According to one aspect of the present invention, the magnification m of the projection lens satisfies the following relationship: m>5;

[0012] The distortion rate dist of the projection lens satisfies the following condition: dist<1%;

[0013] The relative illumination RI of the projection lens satisfies the following condition: RI>75%, and changes monotonically with the field of view of the projection lens.

[0014] According to one aspect of the utility model, the light source is a power-adjustable light source, and the power P of the light source is within the following conditions: 0.2W<P<10W;

[0015] The divergence angle θ of the light source satisfies the following relationship: θ ≥ θ w , where θ w is the maximum incident angle of the optical element to be tested in actual module or system operation;

[0016] The light-emitting aperture D of the light source satisfies that the light-emitting area of ​​the light source completely covers the light hole of the first aperture.

[0017] According to one aspect of the present invention, the light emitting aperture D of the light source and the light aperture of the first aperture The following relationship is satisfied:

[0018]

[0019] Wherein, d1 represents the distance from the light source to the first aperture;

[0020] The aperture of the first aperture The clear aperture of the second diaphragm Satisfies the following relationship:

[0021]

[0022] Wherein, d2 represents the distance from the first aperture to the second aperture;

[0023] The aperture of the second aperture The aperture of the optical element to be measured Satisfies the following relationship: and

[0024] According to one aspect of the utility model, the CCD camera includes a lens and a CCD, and the CCD camera meets the following conditions:

[0025] The object distance d3 of the lens is within the depth of field of the lens;

[0026] The field of view object height ho of the lens is greater than the size L of the light spot to be photographed;

[0027] The angular resolution θ of the lens r Satisfies the following relationship: r >arctan(l r / d3), where l r It represents the distance between small data points required by the CCD to perform data analysis on the optical element to be measured.

[0028] According to one aspect of the utility model, the light source, the first aperture, the second aperture, the CCD camera and the light spot receiving unit are arranged on the stage by a movable fixture, and the light passing areas of the light source, the first aperture, the second aperture, the CCD camera and the light spot receiving unit are on the same central axis;

[0029] A locking device is arranged on the movable clamp.

[0030] According to the optical element performance testing device of the utility model, a novel and practical optical element performance testing device is designed, which can be used for the performance testing of small-sized, multi-block optical systems. The utility model sets a light source, two apertures with adjustable apertures, a movable fixture, and a light spot receiving part between the optical element to be tested and the CCD camera. The light spot receiving part includes a milky white glue layer and / or a projection magnification part. The light distribution on the rear surface of the optical element to be tested can be picked up through the milky white glue layer and / or the projection magnification component, thereby improving the quality of the light distribution of the optical element to be tested obtained by the CCD camera. It can effectively solve the problem that the light spots of each block will crosstalk with each other when the small-sized, multi-block long-distance receiving screen receives, so that they are mixed into a whole light spot and the performance of the optical element to be tested cannot be distinguished. On the other hand, the platform construction of this scheme can also solve the problem of light source adaptation of a single-component optical element separated from the entire optical system, so that the light incident on the optical element to be tested is as close to the light form transmitted from the previous optical system of the sample to be tested as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the optical element performance testing device of Example 1 of the present utility model;

[0032] Figure 2 This is a schematic structural diagram of an optical element performance testing device according to Example 1 of the present utility model;

[0033] Figure 3 It is a cross-sectional schematic diagram of an optical element performance testing device according to Example 1 of the present utility model;

[0034] Figure 4 It is a schematic diagram of assembling the second aperture, the optical element to be measured and the glass substrate in Example 1 of the present utility model;

[0035] Figure 5 This is a schematic diagram of the separation structure of the second aperture, the optical element to be measured and the glass substrate in Example 1 of the utility model;

[0036] Figure 6 This is a schematic diagram of the structure of an optical element performance testing device according to Embodiment 2 of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of an optical element performance testing device according to Example 3 of the present utility model;

[0038] Figure 8 It is a structural schematic diagram of an optical element performance testing device according to Example 4 of the present utility model;

[0039] Fig. 9 This is a schematic diagram of the structure of an optical element performance testing device according to Example 5 of the present utility model.

[0040] The corresponding relationship between the component names and the reference numerals is as follows:

[0041] 1. Light source; 2. First aperture; 3. Second aperture; 4. Moving fixture; 5. Optical element to be measured; 6. Glass substrate; 7. CCD camera; 8. Projection lens; 9. Projection receiving screen; 10. Stage. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the drawings required for the implementation are briefly introduced below. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. The implementation methods cannot be described one by one here, but the implementation methods of the present invention are not therefore limited to the following implementation methods.

[0045] The utility model discloses an optical element performance testing device, comprising a stage, a testing assembly being arranged on the stage, the testing assembly comprising a light source, a first diaphragm, a second diaphragm and a CCD camera being arranged in sequence from front to back along the object side to the image side, the optical element to be tested being arranged between the second diaphragm and the CCD camera; the apertures of the first diaphragm and the second diaphragm are adjustable, the aperture of the first diaphragm is set to, the second diaphragm is arranged at the light inlet of the optical element to be tested; a light spot receiving part is arranged between the optical element to be tested and the CCD camera, the light spot receiving part comprising a milky white glue layer and / or a projection magnification component.

[0046] The device composed of the above components can effectively solve the problem of crosstalk between different blocks of the light spots received during the performance test of a single optical element to be tested in a microlens array. By setting the first aperture, the incident light of the second aperture is adjusted to avoid mutual interference between the light sources of adjacent optical elements to be tested in the microlens array, thereby improving the incident mode of the single-component test light in the microlens array to be close to the incident mode during its actual imaging, and avoiding the influence of the light source interference of the adjacent elements to be tested on the test results. At the same time, the light spot receiving part set on the rear side of the optical element to be tested is used to receive the light distribution on the rear surface of the optical element to be tested, so as to avoid crosstalk between the light spots received in different blocks and mixing into a whole light spot, making it impossible to distinguish the performance of the optical element to be tested, and affecting the test results.

[0047] Specifically, the light spot receiving part can be a milky white glue layer directly coated on the rear surface of the optical element to be measured, or the light spot receiving part can include a glass substrate and a milky white glue layer, the milky white glue layer is coated on the front surface of the glass substrate and is arranged close to the rear surface of the optical element to be measured.

[0048] Optionally, the projection magnification component includes a projection lens and a projection receiving screen arranged on the front side of the CCD camera, and the projection lens is arranged on the front side of the projection receiving screen.

[0049] By setting up latex and / or lens, lens receiving screen, the light distribution on the rear surface of the optical element to be tested can be received, thereby avoiding the mutual crosstalk of the light spots of each block as the receiving distance increases when testing small-sized, multi-block optical elements, thereby affecting the test results.

[0050] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0051] Example 1

[0052] like Figures 1 to 5 As shown, the optical element performance testing device of the utility model includes a stage 10, on which a testing assembly is arranged, the testing assembly includes a light source 1, a first aperture 2, a second aperture 3, and a CCD camera 7 which are arranged in sequence from front to back along the object side to the image side, the optical element 5 to be tested is arranged between the second aperture 3 and the CCD camera 7; the apertures of the first aperture 2 and the second aperture 3 are adjustable, the second aperture 3 is arranged at the light inlet of the optical element 5 to be tested; and a light spot receiving part is provided between the optical element 5 to be tested and the CCD camera 7.

[0053] Specifically, the overall architecture of the optical element performance testing device in the present embodiment is arranged from bottom to top, wherein a light source 1, a first aperture 2, a second aperture 3, an optical element to be tested 5, a light spot receiving unit and a CCD camera 7 are arranged in sequence, and the light spot receiving unit includes a glass substrate 6 and a milky white glue layer, the milky white glue layer is coated on the front surface of the glass substrate 6 and is arranged close to the rear surface of the optical element to be tested 5, and the thickness of the milky white glue layer is 45 um.

[0054] By setting the milky white glue layer on the glass substrate 6 and then covering the rear surface of the optical element 5 to be measured, the light distribution on the rear surface of the optical element 5 to be measured can be received through the milky white glue layer, while also avoiding damage to the optical element 5 to be measured.

[0055] Preferably, the gap τ between the front surface of the latex glue layer and the rear surface of the optical element 5 to be measured satisfies the following condition: τ<20um. By reasonably allocating the gap τ between the latex glue layer and the rear surface of the optical element 5 to be measured, the gap between the latex glue layer and the rear surface of the optical element 5 to be measured is reduced, thereby reducing the light crosstalk between different sub-areas.

[0056] The device composed of the above components can effectively solve the problem that the light spot received during the performance test of small-sized and multi-block optical elements is far away from the optical element to be tested, resulting in the light spots of each block interfering with each other, so that the light spots are mixed into a whole block of light spots and the performance of the optical element to be tested cannot be distinguished. Since the optical element 5 to be tested is small in size, if it is directly photographed or received by an ordinary whiteboard, the light of each area will crosstalk with each other, resulting in the test result failing to meet the requirements. Therefore, it is proposed to set a light spot receiving unit between the optical element to be tested 5 and the CCD camera 7, and obtain the light distribution on the rear surface of the optical element to be tested 5 through the light spot receiving unit, so as to avoid the light spot crosstalk when receiving on the multi-block long-distance receiving screen. At the same time, by adjusting the light input of the optical element to be tested 5 by two apertures set on the front side of the optical element to be tested 5, the incident mode of the light source 1 is close to the incident mode of the imaging module, so as to avoid the influence of the light field of other elements in the microlens array on the optical element to be tested 5, thereby solving the light source adaptation problem in the test process of the single-component optical element of the microlens array.

[0057] Preferably, the thickness L of the latex layer satisfies the following condition: 15um<L<50um. By setting the thickness of the latex layer within a smaller range, the diffusion effect of light in the latex layer can be reduced, thereby reducing the error between the test data and the actual data.

[0058] Preferably, the light source 1 is a light source with adjustable power, and the power P of the light source 1 is in the following range: 0.2W<P<10W; the divergence angle θ of the light source 1 satisfies the following relationship: θ≥θ w , where θ wis the maximum incident angle of the optical element 5 to be tested in actual module or system operation; the light-emitting aperture D of the light source 1 satisfies that the light-emitting area of ​​the light source 1 completely covers the light hole of the first aperture 2.

[0059] By setting the light source 1 as a power-adjustable light source, the power of the light source 1 can be adjusted according to the usage scenario. In order to match different usage scenarios, it is necessary to consider the wavelength, divergence angle, power, luminous area, etc. of the light source 1. The wavelength of the light source should include the working wavelength of the photosensitive element such as sensor in actual application.

[0060] Preferably, the light emitting aperture D of the light source 1 and the light aperture of the first aperture 2 are The following relationship is satisfied:

[0061]

[0062] Wherein, d1 represents the distance from the light source 1 to the first aperture 2;

[0063] Clear aperture of the first aperture 2 The aperture of the second aperture 3 Satisfies the following relationship:

[0064]

[0065] Wherein, d2 represents the distance from the first aperture 2 to the second aperture 3;

[0066] The aperture of the second aperture 3 is The diameter of the optical element to be measured Satisfies the following relationship: and

[0067] The function of the first aperture 2 is equivalent to the aperture aperture in the optical system, which is used to control the angle of light that can enter the light source 1. At this time, it is necessary to match the distance d1 between the light source 1 and the first aperture 2 and the aperture of the first aperture 2. Thus, the two and the light aperture D of the determined light source 1 satisfy equation (1). Similarly, the distance d2 between the first aperture 2 and the second aperture 3 and the aperture of the second aperture 3 are Formula (2) should be satisfied.

[0068] Preferably, the CCD camera 7 includes a lens and a CCD, and the CCD camera 7 meets the following conditions: the object distance d3 of the lens is within the depth of field of the lens; the field of view object height ho of the lens is greater than the size L of the light spot to be photographed; the angular resolution θ of the lens is r Satisfies the following relationship: r >arctan(l r / d3), where l rIt indicates the distance between small data points required by CCD for data analysis of the optical element 5 to be measured. The function of CCD camera 7 is to take photos of the light spots. CCD and lens parameters will be selected according to the required pixel size, and finally the measured data will be used for data processing such as uniformity calculation.

[0069] Preferably, if Figure 2 and 3 As shown, the light source 1, the first aperture 2, the second aperture 3, the optical element to be measured 5, the CCD camera 7 and the light spot receiving part are arranged on the stage 10 through the movable fixture 4, and the light passing areas of the light source 1, the first aperture 2, the second aperture 3, the optical element to be measured 5, the CCD camera 7 and the light spot receiving part are on the same central axis; a locking device is arranged on the movable fixture 4.

[0070] The mobile fixture 4 can be used as a carrier for carrying two apertures, the optical element to be tested 5 and the CCD camera 7. The corresponding d1 and d2 values ​​are obtained by moving its position, and the components are always kept concentric during the movement. The mobile fixture 4 can slide on the stage 10, and after sliding to the target position, the position can be fixed by a locking device such as a screw. The mobile fixture 4 is an important part of controlling the entire test system. When the divergence angle of the light source 1 and the aperture of the first aperture 2 and the second aperture 3 change, the mobile fixture 4 can adjust the distance between the first aperture 2 and the second aperture 3, the light source 1, and the optical element to be tested 5, and maintain the light transmission area of ​​the carried component on the same central axis, thereby ensuring the angle of light entering the sample to be tested and the irradiation area.

[0071] The assembly process of the whole system is as follows: first, fix the light source 1 at the bottom layer, then use the imaging lens group to incident the upper and lower edge light angles of each field of view of the optical element 5 to be tested, and inversely infer the optimal placement position of the first aperture 2 and the size of the aperture of the first aperture 2 (wherein the field of view division method is based on the area division of the optical element 5 to be tested), and at the same time determine the distance of the optical element 5 to be tested above the first aperture 2, and finally place the second aperture 3 on the lower surface of the optical element 5 to be tested, and set the aperture of the second aperture 3 to be slightly larger than the aperture of the optical element 5 to be tested to prevent damage to the surface structure of the optical element 5 to be tested. A glass substrate 6 with a very thin layer of milky white glue on the rear surface of the optical element 5 to be tested is used as a light spot receiving part to receive the light spot, and the thickness of the milky white glue layer is about 40um.

[0072] Example 2

[0073] like Figure 6As shown, the overall architecture of the optical element performance testing device in this embodiment is the same as the overall test system architecture of the optical element performance testing device in Example 1, and is arranged from bottom to top, namely, the light source 1, the first aperture 2, the second aperture 3, the optical element to be tested 5, the light spot receiving unit and the CCD camera 7 are arranged in sequence. The difference is that, in this embodiment, the light spot receiving unit is a milky white glue layer directly coated on the optical element to be tested 5, and the optical element to be tested 5 is arranged on the upper surface of the second aperture 3.

[0074] The light spot receiving part is a milky white glue layer directly coated on the rear surface of the optical element 5 to be measured.

[0075] The working principle of the latex layer is similar to that of a lampshade, which can effectively receive light and act as a receiving screen for the test component. The latex layer can be directly arranged on the rear surface of the optical element 5 to be tested, so as to reduce the distance between the latex layer and the rear surface of the optical element 5 to be tested, thereby improving the effect of the light distribution on the rear surface of the optical element 5 to be tested obtained by the latex layer.

[0076] In addition, in this embodiment, the power P, divergence angle θ and light-emitting aperture D of the light source 1, the aperture of the first aperture 2 The distance d1 from the light source 1 to the first aperture 2 and the aperture of the second aperture 3 The distance d2 from the first aperture 2 to the second aperture 3, the object distance d3 of the CCD camera 7 lens, the field of view object height ho and the angular resolution θ r The settings of other parameters are the same as those in Example 1.

[0077] Example 3

[0078] like Figure 7 As shown, the overall structure of the optical element performance test device in this embodiment is arranged from left to right, namely, the light source 1, the first aperture 2, the second aperture 3, the optical element to be tested 5, the projection lens 8, the projection receiving screen 9 and the CCD camera 7 are arranged in sequence, and the distance of each component in the test device is controlled by the mobile fixture 4.

[0079] In this embodiment, a projection lens 8 and a projection receiving screen 9 are provided between the optical element 5 to be tested and the CCD camera 7 as a light spot receiving part, and a high-resolution camera is used for the CCD camera 7. Since the resolution of the CCD camera 7 is very high, when the lens or the CCD is appropriately matched, a projection lens 8 can be directly provided between the optical element 5 to be tested and the CCD camera 7, and the light distribution on the rear surface of the optical element 5 to be tested is magnified and projected onto the projection receiving screen 9 through the projection lens 8, and then the magnified image on the projection receiving screen 9 is photographed by the CCD camera 7.

[0080] By setting the projection lens 8 and the projection receiving screen 9, the light distribution on the rear surface of the component to be tested 5 is directly obtained through the projection lens 8, and there is no need to set a milky white glue layer or a glass substrate on the optical component to be tested 5, which reduces the test operation steps and reduces the operation complexity. At the same time, the projection lens 8 can amplify the light distribution on the rear surface of the component to be tested 5, reducing the parameter requirements of the CCD camera 7.

[0081] Preferably, the magnification m of the projection lens 8 satisfies the following relationship: m>5; the distortion rate dist of the projection lens 8 satisfies the following condition: dist<1%; the relative illumination RI of the projection lens 8 satisfies the following condition: RI>75%, and changes monotonically with the field of view of the projection lens 8. By adding the projection lens 8, the angular resolution θ of the lens of the CCD camera 7 can be reduced. r Require.

[0082] In addition, in this embodiment, the power P, divergence angle θ and light-emitting aperture D of the light source 1, the aperture of the first aperture 2 The distance d1 from the light source 1 to the first aperture 2 and the aperture of the second aperture 3 The distance d2 from the first aperture 2 to the second aperture 3, the object distance d3 of the CCD camera 7 lens, the field of view object height ho and the angular resolution θ r The settings of other parameters are the same as those in Example 1.

[0083] Example 4

[0084] like Figure 8 As shown, the overall structure of the optical element performance test device in this embodiment is arranged from left to right, and the light source 1, the first aperture 2, the second aperture 3, the optical element to be tested 5, the light spot receiving unit and the CCD camera 7 are arranged in sequence, and the distance of each test system component is controlled by the moving fixture 4. The light spot receiving unit includes a milky white glue layer directly coated on the rear surface of the optical element to be tested 5, and a projection lens 8 and a projection receiving screen 9 arranged on the right side of the optical element to be tested 5. The function of the projection lens 8 is to amplify the light spot on the milky white glue layer in equal proportion, and then project it onto the projection receiving screen 9, receive it through the projection receiving screen 9, and finally shoot it with the CCD camera 7 to obtain the amplified light spot distribution.

[0085] The milky white glue layer is arranged on the rear surface of the optical element 5 to be measured to improve the quality of the picked-up light spot distribution. The light spot on the milky white glue layer can be proportionally magnified by the projection lens 8, thereby reducing the parameter requirements for the CCD camera 7.

[0086] In addition, in this embodiment, the power P, divergence angle θ and light-emitting aperture D of the light source 1, the aperture of the first aperture 2 The distance d1 from the light source 1 to the first aperture 2 and the aperture of the second aperture 3 The distance d2 from the first aperture 2 to the second aperture 3, the object distance d3 of the CCD camera 7 lens, the field of view object height ho and the angular resolution θ r The settings of parameters such as the magnification m, distortion rate dist and relative illumination RI of the projection lens 8 are the same as those in Example 1.

[0087] Example 5

[0088] like Fig. 9 As shown, the overall structure of the optical element performance testing device in this embodiment is the same as the overall structure of the optical element performance testing device in Example 4, and both are arranged from left to right, namely, the light source 1, the first aperture 2, the second aperture 3, the optical element to be tested 5, the light spot receiving unit and the CCD camera 7 are arranged in sequence, the light spot receiving unit includes a milky white glue layer and a projection lens 8 and a projection receiving screen 9 arranged on the right side of the optical element to be tested 5. The difference is that in this embodiment, the milky white glue layer is arranged on the optical element to be tested 5 through a glass substrate 6, the milky white glue layer is coated on the left side of the glass substrate 6, and the glass substrate 6 is arranged close to the right side of the optical element to be tested 5.

[0089] The optical element 5 to be measured can be prevented from being contaminated and the parameter requirements on the CCD camera 7 can be reduced.

[0090] In addition, in this embodiment, the power P of the light source 1, the divergence angle θ of the light source 1, the light emitting aperture D of the light source 1, and the aperture of the first aperture 2 are The distance d1 from the light source 1 to the first aperture 2 and the aperture of the second aperture 3 The distance d2 from the first aperture 2 to the second aperture 3, the object distance d3 of the CCD camera 7 lens, the field of view object height ho and the angular resolution θ of the CCD camera 7 lens r The settings of parameters such as the magnification m of the projection lens 8, the distortion rate dist of the projection lens 8 and the relative illumination RI are the same as those in Example 4.

[0091] The above is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical element performance testing device, comprising a carrier (10), characterized in that: A test assembly is arranged on the carrier (10), the test assembly comprising a light source (1), a first aperture (2), a second aperture (3), and a CCD camera (7) arranged in sequence from front to back from the object side to the image side, the optical element (5) to be tested is arranged between the second aperture (3) and the CCD camera (7); the apertures of the first aperture (2) and the second aperture (3) are adjustable, and the second aperture (3) is arranged at the light inlet of the optical element (5) to be tested; A light spot receiving portion is provided between the optical element to be measured (5) and the CCD camera (7), the light spot receiving portion comprising a milky white glue layer and / or a projection magnification component, and a gap τ between the front surface of the milky white glue layer and the rear surface of the optical element to be measured (5) satisfies the following condition: τ<20 um.

2. The optical element performance testing device according to claim 1, characterized in that: The latex glue layer is directly coated on the rear surface of the optical element (5) to be measured.

3. The optical element performance testing device according to claim 1, characterized in that: The light spot receiving part also includes a glass substrate (6), and the milky white glue layer is coated on the front surface of the glass substrate (6) and is arranged in close contact with the rear surface of the optical element (5) to be measured.

4. The optical element performance testing device according to claim 2 or 3, characterized in that: The thickness L of the latex glue layer satisfies the following condition: 15um<L<50um.

5. The optical element performance testing device according to any one of claims 1 to 3, characterized in that: The projection magnification component comprises a projection lens (8) and a projection receiving screen (9) arranged on the front side of the CCD camera (7), and the projection lens (8) is arranged on the front side of the projection receiving screen (9).

6. The optical element performance testing device according to claim 5, characterized in that: The magnification m of the projection lens (8) satisfies the following relationship: m>5; The distortion rate dist of the projection lens (8) satisfies the following condition: dist<1%; The relative illumination RI of the projection lens (8) satisfies the following condition: RI>75%, and changes monotonically with the field of view of the projection lens (8).

7. The optical element performance testing device according to claim 1, characterized in that: The light source (1) is a light source with adjustable power. The power P of the light source (1) is within the following range: 0.2W <P<10W; The divergence angle θ of the light source (1) satisfies the following relationship: θ ≥ θ w , where θ w is the maximum incident angle of the optical element (5) to be measured in actual module or system operation; The light-emitting aperture D of the light source (1) satisfies the requirement that the light-emitting area of ​​the light source (1) completely covers the light-through hole of the first aperture (2).

8. The optical element performance testing device according to claim 6, characterized in that: The light emitting aperture D of the light source (1) and the light clearing aperture of the first aperture (2) The following relationship is satisfied: Wherein, d1 represents the distance from the light source (1) to the first aperture (2); The aperture of the first aperture (2) The aperture of the second aperture (3) Satisfies the following relationship: Wherein, d2 represents the distance from the first aperture (2) to the second aperture (3); The aperture of the second aperture (3) and the aperture of the optical element (5) to be measured Satisfies the following relationship: and 9. The optical element performance testing device according to claim 1, characterized in that: The CCD camera (7) comprises a lens and a CCD, and the CCD camera (7) meets the following conditions: The object distance d3 of the lens is within the depth of field of the lens; The field of view object height ho of the lens is greater than the size L of the light spot to be photographed; The angular resolution of the lens is θ r Satisfies the following relationship: r >arctan(l r / d3), where l r Indicates the distance between small data points required when the CCD performs data analysis on the optical element (5) to be measured.

10. The optical element performance testing device according to claim 1, characterized in that: The light source (1), the first aperture (2), the second aperture (3), the CCD camera (7) and the light spot receiving unit are arranged on the carrier (10) via a movable fixture (4), and the light passing areas of the light source (1), the first aperture (2), the second aperture (3), the CCD camera (7) and the light spot receiving unit are on the same central axis; A locking device is provided on the movable clamp (4).

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