Alignment method for measuring eccentricity of double-sided compound spectacle lens and measuring jig

Abstract

The invention relates to a double-sided compound spectacle lens eccentricity measurement alignment method and a measurement jig, and relates to the technical field of optical calibration, and the method comprises the following steps: designing a preform which is pressed by a molding press with an upper die and a lower die; manufacturing a standard compound eye array element, and adjusting the x-axis direction of the laser transmitter and the y-axis direction of the standard compound eye array element; acquiring position parameters of the standard light spots, and acquiring the position parameters of the standard light spots by a CCD (Charge Coupled Device) photosensitive element; putting the preform into a to-be-measured position, and obtaining position parameters of a measurement light spot; judging whether the position parameter of the standard light spot is aligned with the position parameter of the measurement light spot or not, and measuring the offset; and adjusting the deviation of the laser in the x-axis direction and the y-axis direction according to the offset, so that the laser vertically enters the center of the preform array. According to the invention, it can be ensured that the laser transmitter penetrates through the geometric center of the standard double-sided compound eye array to obtain the accurate standard light spot, the double-sided compound eye element eccentricity measurement effect is optimized, and the compound eye element eccentricity detection credibility is improved.

Description

Technical Field

[0001] The present application relates to the field of optical calibration technology, and particularly to a method for measuring and aligning the eccentricity of a double-sided compound lens and a measuring jig. Background Art

[0002] A compound lens is an optical element formed by integrating and arranging multiple small lenses, and is usually used to generate a uniform light distribution. The design inspiration of the compound lens comes from the compound eye structure in nature, such as the eyes of flies, which are composed of multiple ommatidia units. Each ommatidium has an independent optical system and can work in coordination. The compound lens is mostly used in projectors or lighting systems. Each small lens on it can independently capture light, enabling high-resolution imaging ability, thus providing a wider field of view and clear imaging effect.

[0003] In some projection systems, in order to obtain a better uniform picture, a double-sided compound eye element is usually adopted. However, due to the problem of central alignment, the alignment degree of each sub-unit on each single side of the double-sided glass compound eye element will directly affect the projection effect of the projection product. How to ensure that the two sub-units can be completely aligned is crucial. Summary of the Invention

[0004] In order to meet the market needs and solve the problem that the central alignment degrees of each sub-unit on each single side of the double-sided compound eye element are different, the present application provides a method for measuring and aligning the eccentricity of a double-sided compound lens and a measuring jig.

[0005] The method for measuring and aligning the eccentricity of a double-sided compound lens and the measuring jig provided by the present application adopt the following technical solutions:

[0006] A method for measuring and aligning the eccentricity of a double-sided compound lens includes the following steps:

[0007] S1: Design a preform for preparing a double-sided compound lens. The preform is pressed by a molding press with an upper mold and a lower mold, and a sleeve with a plurality of air holes on its surface is installed between the upper mold and the lower mold;

[0008] S2: Manufacture a standard compound eye array element, adjust the x-axis direction of the laser emitter and the y-axis direction of the standard compound eye element, so that the laser beam of the laser emitter vertically enters the geometric center of the standard double-sided compound eye array element;

[0009] S3: Obtain the position parameters of the standard light spot transmitted through the standard double-sided compound eye array element by the laser emitter, and collect the position parameters of the standard light spot by a CCD photosensitive element;

[0010] S4: Place the preform at the position to be measured, and obtain the position parameters of the measurement light spot transmitted through the preform by the laser emitter;

[0011] S5: Determine whether the position parameters of the standard light spot of the standard double-sided compound eye array element are aligned with the position parameters of the measured light spot of the preform, and record the offset according to the position deviation;

[0012] S6: Adjust the deviation of the laser in the x-axis and y-axis directions according to the offset, so that the laser is perpendicularly incident on the center of the preform array.

[0013] Optionally, the step S3 includes the following steps:

[0014] S31: Transmit the position parameters of the standard light spot collected by the CCD photosensitive element to the analysis software of the computer;

[0015] S32: In the analysis software, establish a rectangular coordinate system with the geometric center of the standard light spot as the coordinate origin.

[0016] Optionally, set the deviation of the measured light spot in the x-axis direction as dx, the deviation of the measured light spot in the y-direction as dy, and the total deviation of the measured light spot as D, then:

[0017]

[0018] A measuring jig for the eccentricity of a double-sided compound eye lens, comprising a plurality of support columns arranged in an array and placed on the ground, and the tops of the plurality of support columns are commonly connected to a working platform. One side of the working platform is provided with a support plate extending above the working platform, and one end of the support plate away from the working platform is connected to a fixing plate. A laser is vertically embedded on the fixing plate. Two slide rails are symmetrically installed on the working platform, and a matching block is slidably connected to the two slide rails. An installation jig for installing the preform is installed on the matching block, and a photosensitive lens is connected below the installation jig. A CCD photosensitive element is commonly installed on the plurality of support columns. The CCD photosensitive element, the photosensitive lens, the installation jig and the laser are always coaxial, and an imaging plate is connected to the bottom of the CCD photosensitive element.

[0019] Optionally, an installation plate is installed on the working platform, and a connecting rod for driving the matching block is slidably arranged on the installation plate, and the end of the connecting rod is connected to the matching block.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The present application can quickly and accurately measure the eccentricity of the double-sided compound eye lens, and compare it with the standard compound eye array element. The measurement result is intuitive, which improves the credibility of the eccentricity detection of the compound eye element;

[0022] 2. This application can precisely adjust the eccentricity values of the compound lens and the laser, thereby achieving rapid alignment of the center of the compound lens. Description of the Drawings

[0023] Figure 1 It is a schematic front view structure diagram of an eccentricity measurement fixture for a double-sided compound lens of this application.

[0024] Figure 2 It is a schematic side view structure diagram of an eccentricity measurement fixture for a double-sided compound lens of this application.

[0025] Figure 3 It is the spot position parameter displayed on the data display screen after measurement in this application.

[0026] Figure 4 It is a picture of the spot information transmitted to the data processing software.

[0027] Description of the reference numerals: 1, preform; 2, standard spot; 3, measurement spot; 4, CCD photosensitive element; 41, imaging plate; 5, support column; 6, working platform; 61, slide rail; 62, mating block; 621, mounting fixture; 622, photosensitive lens; 7, support plate; 71, fixing plate; 72, laser; 8, mounting plate; 81, connecting rod. Detailed Description of the Invention

[0028] The following further details this application with reference to the drawings X-X.

[0029] The embodiment of this application discloses a method and a fixture for measuring and aligning the eccentricity of a double-sided compound lens.

[0030] Referring to Figures 1-4 , a method for measuring and aligning the eccentricity of a double-sided compound lens, characterized by comprising the following steps:

[0031] S1: Design a preform 1 for preparing a double-sided compound lens. The preform 1 is pressed by a molding press having an upper mold and a lower mold, and a sleeve with a plurality of air holes is installed between the upper mold and the lower mold;

[0032] Among them, opening a plurality of air holes in the sleeve can ensure that the air in the mold cavity can be completely discharged during the mold pressing process, reduce the residual gas in the mold, ensure that the material can fill the mold correctly and in a timely manner, avoid air being trapped inside the mold to form bubbles or defects, make the plastic part molding process smoother, and thus improve production efficiency.

[0033] S2: Manufacture a standard compound eye array element, adjust the x-axis direction of the laser emitter and the y-axis direction of the standard compound eye element, so that the laser beam of the laser emitter is perpendicularly incident into the geometric center of the standard double-sided compound eye array element;

[0034] S3: Obtain the position parameters of the standard light spot 2 transmitted through the standard double-sided compound eye array element by the laser emitter, and collect the position parameters of the standard light spot 2 by the CCD photosensitive element 4;

[0035] S4: Place the preform 1 at the position to be measured, and obtain the position parameters of the measurement light spot 3 transmitted through the preform 1 by the laser emitter;

[0036] S5: Determine whether the position parameters of the standard light spot 2 of the standard double-sided compound eye array element are aligned with the position parameters of the measurement light spot 3 of the preform 1, and record the offset according to the position deviation;

[0037] S6: Adjust the deviation of the laser in the reverse direction of the x-axis according to the offset, so that the laser is vertically incident on the center of the preform 1 array.

[0038] The data obtained by this method can help the producer to produce a compound eye lens with completely aligned centers, thus greatly improving the projection effect after the light beam passes through the compound eye lens, which has important guiding and reference significance for the producer.

[0039] Refer to Figures 1-4 , step S3 includes the following steps:

[0040] S31: Transmit the position parameters of the standard light spot 2 collected by the CCD photosensitive element 4 to the analysis software of the computer;

[0041] S32: In the analysis software, establish a rectangular coordinate system with the geometric center of the standard light spot 2 as the coordinate origin.

[0042] By simulating data and establishing a rectangular coordinate system in the software, the producer can accurately and conveniently analyze the offset conditions of the laser passing through the preform 1 and the standard double-sided compound eye array element respectively, so as to accurately adjust the offset direction of the laser according to the offset, with simple operation and improved accuracy of the center alignment of the compound eye lens.

[0043] Refer to Figure 3 , set the deviation of the measurement light spot 3 in the x direction as dx, the deviation of the measurement light spot 3 in the y direction as dy, and the total deviation of the measurement light spot 3 as D, then:

[0044] Among them, D is the amount of offset in the direction of the origin that needs to be adjusted.

[0045] Refer to Figures 1-4, A double-sided compound lens eccentricity measurement fixture, including a number of support columns 5 arranged in an array and placed on the ground, and a working platform 6 is commonly connected to the tops of the number of support columns 5. A support plate 7 extending above the working platform 6 is installed on one side of the working platform 6, and a fixing plate 71 is connected to the end of the support plate 7 away from the working platform 6. A laser 72 is embedded in the fixing plate 71 in the vertical direction. The laser 72 is slidably connected to the fixing plate 71 to facilitate adjusting the distance from the compound lens, forming a clearer projection image.

[0046] Referring to Figures 1-4 , Two slide rails 61 are symmetrically installed on the working platform 6, and a fitting block 62 is slidably connected to the two slide rails 61 together. An installation fixture 621 for installing the preform 1 is installed on the fitting block 62, and a photosensitive lens 622 is connected below the installation fixture 621. A CCD photosensitive element 4 is commonly installed on the number of support columns 5. The CCD photosensitive element 4, the photosensitive lens 622, the installation fixture 621, and the laser 72 are always coaxial. An imaging plate 41 is connected to the bottom of the CCD photosensitive element 4.

[0047] This structure is to enable the fixing plate 71 to move along the guide rail to achieve the function of adjusting the error in the x direction. The fitting block 62 is used to fix the lens installation fixture 621, and at the same time it can move along the guide rail to adjust the error in the y direction between the standard part and the laser 72.

[0048] The function of the photosensitive lens 622 is to take pictures and collect the actual light spot, and compare it with the light spot collected by the CCD photosensitive element 4.

[0049] Referring to Figures 1-4 , Further, an installation plate 8 is installed on the working platform 6. A connecting rod 81 for driving the fitting block 62 is slidably arranged on the installation plate 8, and the end of the connecting rod 81 is connected to the fitting block 62.

[0050] Through the connecting rod 81, the translational movement can be converted into rotation by the lead screw, realizing the precise adjustment of the positions of the fitting block 62 and the compound lens, avoiding the problem of easy error in direct manual adjustment. And the connecting rod 81 can also fasten the lens installation fixture 621 to prevent the lens from vibrating and causing too large an offset during the movement.

[0051] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore: All equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A method for measuring and aligning the eccentricity of a double-sided compound spectacle lens, characterized in that: It includes the following steps: S1: Design a preform (1) for preparing a double-sided compound eye lens. The preform (1) is pressed by a molding press having an upper mold and a lower mold, and a sleeve with a plurality of air holes on its surface is installed between the upper mold and the lower mold; S2: Fabricate a standard compound eye array element, adjust the x-axis direction of the laser emitter and the y-axis direction of the standard compound eye element, so that the laser beam of the laser emitter perpendicularly enters the geometric center of the standard double-sided compound eye array element; S3: Obtain the position parameters of the standard light spot (2) of the laser emitter passing through the standard double-sided compound eye array element, and collect the position parameters of the standard light spot (2) by a CCD photosensitive element (4); S4: Place the preform (1) at the position to be measured, and obtain the position parameters of the measurement light spot (3) of the laser emitter passing through the preform (1); S5: Determine whether the position parameters of the standard light spot (2) of the standard double-sided compound eye array element are aligned with the position parameters of the measurement light spot (3) of the preform (1), and record the offset according to the position deviation; S6: Adjust the deviation of the laser in the x-axis and y-axis directions according to the offset, so that the laser perpendicularly enters the center of the preform (1) array.

2. A method for measuring and aligning the eccentricity of a double-sided compound spectacle lens according to claim 1, characterized in that: The step S3 includes the following steps: S31: Transmit the position parameters of the standard light spot (2) collected by the CCD photosensitive element (4) to the analysis software of the computer; S32: In the analysis software, establish a rectangular coordinate system with the geometric center of the standard light spot (2) as the coordinate origin.

3. A method for measuring and aligning the eccentricity of a double-sided compound spectacle lens according to claim 1, characterized in that: Set the deviation of the measurement light spot (3) in the x-axis direction as dx, the deviation of the measurement light spot (3) in the y-direction as dy, and the total deviation of the measurement light spot (3) as D, then:

4. A double-sided compound spectacle lens eccentricity measurement fixture according to any one of claims 1-3, characterized in that: It includes a plurality of support columns (5) arranged in an array and placed on the ground, and the tops of the plurality of support columns (5) are commonly connected to a working platform (6). One side of the working platform (6) is installed with a support plate (7) extending above the working platform (6), and one end of the support plate (7) away from the working platform (6) is connected to a fixing plate (71). A laser (72) is vertically embedded on the fixing plate (71). Two slide rails (61) are symmetrically installed on the working platform (6), and a fitting block (62) is commonly slidably connected on the two slide rails (61). An installation jig (621) for installing the preform (1) is installed on the fitting block (62), and a photosensitive lens (622) is connected below the installation jig (621). A CCD photosensitive element (4) is commonly installed on the plurality of support columns (5). The CCD photosensitive element (4), the photosensitive lens (622), the installation jig (621), and the laser (72) are always coaxial. The bottom of the CCD photosensitive element (4) is connected to an imaging plate (41).

5. The double-sided compound lens eccentricity measurement fixture according to claim 4, characterized in that: An installation plate (8) is installed on the working platform (6), and a connecting rod (81) for driving the fitting block (62) is slidably arranged on the installation plate (8). The end of the connecting rod (81) is connected to the fitting block (62).

Images