Center thickness gauge for optical element

Abstract

The utility model provides a center thickness gauge for an optical element. The center thickness gauge comprises a base; the clamp is arranged on the base and is used for clamping an optical part to be tested; the vertical standard frame is arranged on the base; the upper detection assembly is movably arranged on the vertical standard frame in the vertical direction and located above the clamp, the upper detection assembly comprises an upper contact piece and a detection meter, and the upper contact piece and the detection meter synchronously move up and down; the lower abutting assembly is movably arranged on the vertical standard frame in the vertical direction and located below the clamp, the lower abutting assembly comprises a lower abutting part and a standard pushing piece, and the standard pushing piece and the lower abutting part synchronously move up and down; the upper contact piece and the lower abutting part abut against the upper surface and the lower surface of the optical piece respectively, so that the standard pushing piece pushes the measuring rod of the detection meter to stretch out and draw back. The problems that an existing dial gauge and a thickness gauge are limited in structure and small in measuring range, and optical pieces with large center thickness and boundary dimension are measured are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical part detection equipment, and more particularly to a center thickness gauge for optical parts. BACKGROUND

[0002] In the machining process of existing optical parts, the thickness of the optical parts is usually ensured, and the thickness of the optical parts is usually directly measured by using a dial gauge, a micrometer or a thickness gauge. During the measurement, the dial gauge is usually directly used to measure the thickness of the optical parts in the thickness direction. For example, the optical part product is placed on the center thickness gauge, the cantilever drives the measuring gauge to be suspended above the product, and the center thickness of the product is measured at the center position of the product.

[0003] However, the structure of the dial gauge and the micrometer is limited, and the optical parts with a slightly larger size cannot be directly measured. The measuring range of the thickness gauge is limited, and the measuring range of most ordinary thickness gauges does not exceed 200 mm. With the development of the market, it is obvious that the center thickness of the product cannot be measured, and the optical parts with a larger thickness are not easy to measure.

[0004] Therefore, the prior art still needs to be improved and developed. CONTENT OF THE INVENTION

[0005] The present application aims to provide a center thickness gauge for optical parts, which solves the problem that the measuring range of the thickness gauge in the prior art is small and it is difficult to measure the optical parts with a larger thickness and a larger size.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0007] The present application provides a center thickness gauge for optical parts, which comprises:

[0008] a base;

[0009] a clamp, which is arranged on the base and is used to clamp the optical part to be measured;

[0010] a vertical standard frame, which is arranged on the base;

[0011] an upper detection assembly, which is movably arranged on the vertical standard frame in the up-down direction and is located above the clamp, and the upper detection assembly comprises an upper contact piece and a detection gauge, and the upper contact piece moves up and down synchronously with the detection gauge;

[0012] a lower abutting assembly, which is movably arranged on the vertical standard frame in the up-down direction and is located below the clamp, and the lower abutting assembly comprises a lower abutting part and a standard pushing piece, and the standard pushing piece moves up and down synchronously with the lower abutting part;

[0013] The upper contact member and the lower abutting member abut on the upper and lower surfaces of the optical member respectively, so that the standard push member pushes the measuring rod of the detection table to extend or retract.

[0014] In an alternative embodiment, the vertical standard frame comprises: a column frame body vertically arranged on a base;

[0015] A standard column is connected to the column frame body, and a guide rail is arranged on the standard column in the vertical direction;

[0016] The upper detection assembly and the lower abutting assembly are movably connected to the guide rail through sliding blocks.

[0017] In an alternative embodiment, the upper detection assembly further comprises: an upper supporting arm movably arranged on the guide rail through a sliding block and extending in a direction perpendicular to the standard column by a predetermined length, and the upper contact member and the detection table are both vertically connected to the upper supporting arm.

[0018] In an alternative embodiment, the upper contact member comprises: a first shaft seat arranged on the upper supporting arm and an upper contact rod arranged on the first shaft seat and vertically extending downward below the upper supporting arm.

[0019] The detection table comprises: a second shaft seat and a table body having a measuring rod and capable of detecting thickness through the extension and retraction of the measuring rod, and the table body is connected to the upper supporting arm through the second shaft seat so that the measuring rod penetrates through the upper supporting arm.

[0020] In an alternative embodiment, the lower abutting assembly further comprises: a lower supporting arm movably arranged on the guide rail below the upper detection assembly through a sliding block and extending in a direction perpendicular to the standard column by a predetermined length, and the lower abutting member and the standard push member are both vertically connected to the lower supporting arm.

[0021] In an alternative embodiment, the lower abutting member comprises: a third shaft seat arranged on the lower supporting arm and a lower contact rod arranged on the third shaft seat and vertically extending upward above the lower supporting arm.

[0022] The standard push member comprises: a standard push rod connected to the lower supporting arm through a supporting platform, and the standard push rod vertically extends upward and abuts on the extendable measuring rod of the detection table.

[0023] The height of the standard push rod is adjustable or replaceable on the supporting platform of the lower supporting arm.

[0024] In an alternative embodiment, reinforcing rib plates are arranged on the lower supporting arm and the upper supporting arm.

[0025] In an alternative embodiment, a push cylinder is arranged on the vertical standard frame, and the push cylinder is used to drive the upper detection assembly to move up and down.

[0026] The vertical standard frame is provided with a jacking cylinder for driving the lower abutting assembly to move up and down;

[0027] Through the driving of the pushing cylinder and the jacking cylinder, the upper detection assembly and the lower abutting assembly have a zero-point correction state and a detection state;

[0028] In the zero-point correction state, the upper detection assembly is lowered by the contraction of the pushing cylinder to abut the upper contact against the upper surface of the standard gauge block, the lower abutting assembly is raised by the contraction of the jacking cylinder to abut the lower abutting part against the lower surface of the standard gauge block, and the standard pushing piece is used to push the measuring rod to calibrate the detection surface;

[0029] In the detection state, the upper detection assembly is lowered by the contraction of the pushing cylinder to abut the upper contact against the upper surface of the optical piece to be measured, the lower abutting assembly is raised by the contraction of the jacking cylinder to abut the lower abutting part against the lower surface of the optical piece to be measured, and the standard pushing piece is used to push the measuring rod to measure the detection surface.

[0030] In an optional embodiment, the clamp comprises a three-jaw chuck arranged on the base through a rotating disc;

[0031] The clamp is provided with a detection through hole, and the clamp is used to clamp the optical piece to be measured so that the optical piece covers the detection through hole.

[0032] In an optional embodiment, the base comprises two parallel tables arranged side by side and spaced apart, a clearance space is formed between the two parallel tables, and the lower abutting part and the standard pushing piece are located in the clearance space and move up and down;

[0033] A support is connected to the two parallel tables on both sides and suspends above the clearance space, and the clamp is horizontally arranged on the support.

[0034] The center thickness gauge for optical pieces provided by the application has at least the following advantages: first, the standard gauge block is fixed by the clamp, the upper detection assembly is lowered to abut the upper contact against the upper surface of the standard gauge block, the lower abutting assembly is raised by the contraction of the jacking cylinder to abut the lower abutting part against the lower surface of the standard gauge block, the standard pushing piece is used to push the measuring rod to calibrate the detection table, at this time, the detection table can be calibrated to 0 or the same calibration value as the standard gauge block. After the standard gauge block is removed, the optical piece to be measured is fixed by the clamp, the upper detection assembly is lowered to abut the upper contact against the upper surface of the optical piece to be measured, the lower abutting assembly is raised by the contraction of the jacking cylinder to abut the lower abutting part against the lower surface of the optical piece to be measured, and the standard pushing piece is used to push the measuring rod to measure the detection table. Since the thickness of the optical piece to be measured is not much different from that of the standard gauge block, the extension and contraction amount of the measuring rod pushed by the standard pushing piece is not large, therefore, when measuring the optical piece with large thickness, a standard gauge block with thickness close to that of the optical piece is selected for measurement, the change of the extension and contraction amount of the measuring rod of the detection table is not large, and the limit extension and contraction range of the measuring rod is ensured, so that the optical piece with large thickness can be measured. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0036] Figure 1 The structural schematic diagram of the main part of the center thickness gauge for optical pieces provided by the embodiments of the present application;

[0037] Figure 2 The sectional view of the main part of the center thickness gauge for optical pieces provided by the embodiments of the present application;

[0038] Figure 3 The structural schematic diagram of the center thickness gauge for optical pieces provided by the embodiments of the present application after removing the base;

[0039] Figure 4 The principle schematic diagram of the center thickness gauge for optical pieces provided by the embodiments of the present application in use;

[0040] Figure 5 The structural schematic diagram of the center thickness gauge for optical pieces provided by the embodiments of the present application with the cylinder;

[0041] Figure 6 The front view of the center thickness gauge for optical pieces provided by the embodiments of the present application with the cylinder.

[0042] In the drawings:

[0043] 10, optical element; 20, standard gauge block; 100, base; 110, parallel table; 120, avoiding space; 130, support; 200, clamp; 210, three-jaw chuck; 220, rotary table; 230, detection through hole; 300, vertical standard frame; 310, column frame body; 320, standard column; 330, guide rail; 340, sliding block; 400, upper detection assembly; 410, upper support arm; 420, upper contact piece; 421, first shaft seat; 422, upper contact rod; 430, detection table; 431, table body; 432, measuring rod; 433, second shaft seat; 440, reinforcing rib plate; 450, pushing cylinder; 500, lower abutting assembly; 510, lower support arm; 520, lower abutting part; 521, third shaft seat; 522, lower contact rod; 530, standard pushing element; 531, support table; 532, standard pushing rod; 533, jacking cylinder. DETAILED DESCRIPTION

[0044] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0045] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, and are only for the convenience of description, and cannot be understood as a limitation on the technical solutions. The terms "first", "second" are only for the convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0046] Please refer to Figure 1 , Figure 4The embodiment provides a center thickness gauge for optical parts, which mainly comprises a base 100, a clamp 200, a vertical standard frame 300, an upper detection assembly 400 and a lower abutting assembly 500. The base 100 can be placed on a workbench, and other components can be arranged on the base 100. The clamp 200 can be horizontally arranged on the base 100 and used for clamping the optical part 10 to be detected. The vertical standard frame 300 is arranged on the rear side of the base 100 in the vertical direction. The upper detection assembly 400 is movably arranged on the vertical standard frame 300 in the up-down direction and located above the clamp 200. When the clamp 200 clamps the optical part 10 to be detected, the upper detection assembly 400 can move up and down on the upper side of the optical part 10. The upper detection assembly 400 comprises an upper contact 420 and a detection table 430. The upper contact 420 moves up and down synchronously with the detection table 430. The detection table 430 can be a mechanical table or an electronic table. The lower end of the detection table 430 is movably arranged as a measuring rod 432. The reading of the detection table 430 changes according to the expansion and contraction of the measuring rod 432. Thus, the expansion and contraction of the measuring rod 432 can be detected through the detection table 430 to detect the thickness. If the detection table 430 is an electronic table, the center thickness index of the optical lens (optical part 10) can be quickly detected and real-time feedback recorded on the computer. The lower abutting assembly 500 is movably arranged on the vertical standard frame 300 in the up-down direction and located below the clamp 200. Thus, the lower abutting assembly 500 can move up and down on the lower side of the optical part 10. The lower abutting assembly 500 comprises a lower abutting part 520 and a standard pushing part 530. The standard pushing part 530 moves up and down synchronously with the lower abutting part 520. When the thickness of the optical part 10 is measured, the upper contact 420 and the lower abutting part 520 abut on the upper and lower surfaces of the optical part 10 respectively, and the standard pushing part 530 pushes the measuring rod 432 of the detection table 430 to expand and contract, so that the measured value is read on the detection table 430.

[0047] Please refer to Figure 1 、 Figure 2 、 Figure 4The center thickness gauge for optical element of the embodiment is used to fix the standard gauge block 20 through the clamp 200, to make the upper contact piece 420 abut against the upper surface of the standard gauge block 20 by lowering the upper detection assembly 400, to make the lower abutting assembly 500 move up by the extension of the jacking cylinder 533 so that the lower abutting part 520 abuts against the lower surface of the standard gauge block 20, and to push the measuring rod 432 by the standard pushing piece 530 so that the detection surface 430 is calibrated. At this time, the detection surface 430 can be calibrated to 0 or the same calibration value as the standard gauge block 20. After the standard gauge block 20 is removed, the optical element 10 to be measured is fixed through the clamp 200, the upper contact piece 420 abuts against the upper surface of the optical element 10 to be measured by lowering the upper detection assembly 400, the lower abutting assembly 500 moves up by the extension of the jacking cylinder 533 so that the lower abutting part 520 abuts against the lower surface of the optical element 10 to be measured, and the standard pushing piece 530 is used to push the measuring rod 432 so that the detection surface 430 is measured. Since the thickness of the optical element 10 to be measured is not much different from that of the standard gauge block 20. The extension amount of the measuring rod 432 pushed by the standard pushing piece 530 is not large, and therefore when the optical element 10 with large thickness is measured, a standard gauge block 20 with thickness close to that of the optical element 10 is selected for measurement. The change of the extension amount of the measuring rod 432 of the detection surface 430 is not large, and therefore the measurement of the optical element 10 with large thickness can be ensured within the limit extension range of the measuring rod 432.

[0048] Please refer to Figure 1 , Figure 2 Further, the base 100 of the embodiment specifically comprises two parallel tables 110 and a support 130 arranged side by side and spaced apart. The lower abutting assembly 500 and the standard pushing piece 530 are located in the avoiding space 120 between the two parallel tables 110 and move up and down. The two sides of the support 130 are connected to the parallel tables 110 respectively, the support 130 is suspended above the avoiding space 120, and the clamp 200 is horizontally arranged on the support 130. The support 130 is horizontally arranged on the upper surface, so that the clamp 200 is also in a horizontal state. In the specific structure, the two parallel tables 110 are spaced apart by a certain distance in the middle, so as to avoid the lower abutting assembly 500 below and leave space for the lower abutting assembly 500 to move up and down. In order to make the clamp 200 in a horizontal state, it is usually necessary to ensure the installation accuracy of the base 100 and the support 130. For example, the upper surface of the support 130 is used to install the clamp 200, and the lower surface of the support 130 is installed on the upper surface of the parallel table 110. In this way, the parallelism between the upper surface of the support 130 and the upper surface of the parallel table 110 needs to be ensured within 0.005, so as to ensure the installation accuracy of the clamp 200.

[0049] Please refer to Figure 1 , Figure 2Further, the clamp 200 of the embodiment specifically comprises a three-jaw chuck 210, which is rotatably arranged on the base 100 through a rotating disc 220; the clamp 200 is provided with a detection through hole 230, and the clamp 200 is used for clamping the optical element 10 to be detected, so that the optical element 10 covers the detection through hole 230, and thus the lower abutting part 520 of the lower abutting assembly 500 can abut on the lower surface of the optical element 10 during the up-down movement of the lower abutting part 520. In order to ensure the detection precision, the installation hole position degree of the three-jaw chuck 210 needs to have a precision requirement, for example, the position degree is 0.005, which can ensure the installation precision of the three-jaw chuck 210 on the support 130.

[0050] Please refer to Figure 1 , Figure 2 , Figure 3 Further, the vertical standard frame 300 of the embodiment specifically comprises a column frame body 310 and a standard column 320. The column frame body 310 is vertically arranged on the base 100; the standard column 320 is connected to the column frame body 310, and the standard column 320 is provided with a guide rail 330 in the up-down direction; the upper detection assembly 400 and the lower abutting assembly 500 are movably connected to the guide rail 330 through a sliding block 340. By making the vertical standard frame 300 into a split frame structure, the upper detection assembly 400 and the lower abutting assembly 500 are movably arranged on the guide rail 330 of the standard column 320, which can improve the installation precision and further ensure the measurement precision. The assembly surface of the standard column 320 is finely processed, which ensures that the standard column 320 is vertically arranged on the base 100 (parallel to the upper surface of the parallel table 110), thereby improving the installation precision of the upper detection assembly 400 and the lower abutting assembly 500. In order to facilitate the structural description, the surfaces required to have the form and position tolerances in the application are all assembly surfaces that need to be finely processed. For example, the parallelism between the front surface of the standard column 320 on which the guide rail 330 is installed and the front surface of the column frame body 310 is 0.005, and the perpendicularity between the front surface of the column frame body 310 and the upper surface of the parallel table 110 is 0.005. The left and right sides of the lower part of the column frame body 310 are inserted between the two parallel tables 110 and are fixedly connected to the parallel tables 110, and in order to ensure the connection assembly precision, the parallelism between the inner walls of the left and right sides of the two parallel tables 110 is 0.005.

[0051] Please refer to Figure 1 , Figure 2 , Figure 3Further, the upper detection assembly 400 in the embodiment further comprises an upper support arm 410 movably arranged on the guide rail 330 through the sliding block 340 and extending in a direction perpendicular to the standard column 320 by a predetermined length, and the upper contact 420 and the detection surface 430 are both vertically connected to the upper support arm 410. In the specific structure, the rear end of the upper support arm 410 is connected to the sliding block 340, and the front end extends by a predetermined length towards the front and above the clamp 200. The upper support arm provides a support position for the upper contact 420 and the detection surface 430, and when the upper support arm moves in the up-down direction, the upper contact 420 and the detection surface 430 can move synchronously up and down. In order to ensure the assembly precision, it is required that the parallelism between the front surface of the guide rail 330 and the front surface of the standard column 320 is 0.005, and the perpendicularity between the left and right side surfaces of the standard column 320 and the front surface of the standard column 320 is 0.005.

[0052] Please refer to Figure 1 、 Figure 2 、 Figure 3 Further, the upper contact 420 in the embodiment comprises a first shaft seat 421 and an upper contact rod 422, the first shaft seat 421 is arranged on the upper support arm 410, and the upper contact rod 422 is arranged on the first shaft seat 421 and vertically extends downwards below the upper support arm 410. In the specific structure, the upper contact rod 422 is fixed through the first shaft seat 421, so that the upper contact rod 422 penetrates the upper support arm downwards, realizes stable connection, and in order to ensure that the upper contact rod 422 is in a vertical state, the perpendicularity between the left and right side surfaces of the upper support arm and the rear surface of the upper support arm is 0.005; the perpendicularity between the upper surface of the upper support arm connected to the first shaft seat 421 and the rear surface of the upper support arm is 0.005, the flatness of the surface of the upper support arm connected to the first shaft seat 421 is 0.005, and the cylindricity of the mounting hole on the first shaft seat 421 for mounting the upper contact rod 422 is 0.005.

[0053] Please refer to Figure 1 、 Figure 2 、 Figure 3The detection table 430 is located at the rear side of the upper contact 420, and in the embodiment, the detection table 430 comprises a second shaft seat 433 and a table body 431, the table body 431 has a measuring rod 432, and the thickness detection is performed by the extension and contraction of the measuring rod 432, the table body 431 is connected to the upper support arm 410 through the second shaft seat 433, so that the measuring rod 432 penetrates through the upper support arm 410. The table body 431 is fixed through the second shaft seat 433, and the downward penetrating measuring rod 432 can be opposite to the standard pushing piece 530 of the lower abutting assembly 500, and the detection table 430 can change the reading by the top movement of the standard pushing piece 530. In order to ensure that the measuring rod 432 is in the vertical state, the perpendicularity between the upper surface of the upper support arm connecting the second shaft seat 433 and the rear surface of the upper support arm is 0.005, the flatness of the surface of the upper support arm connecting the second shaft seat 433 is 0.005, and the cylindricity of the mounting hole of the second shaft seat 433 for mounting the table body 431 is 0.005.

[0054] Please refer to Figure 1 、 Figure 2 、 Figure 3 Further, the lower abutting assembly 500 of the embodiment further comprises a lower support arm 510, the lower support arm 510 is movably arranged on the guide rail 330 through the sliding block 340 and located below the upper detection assembly 400, the lower support arm 510 extends in the direction perpendicular to the standard column 320 by a predetermined length, and the lower abutting part 520 and the standard pushing piece 530 are both vertically connected to the lower support arm 510. In the specific structure, the rear end of the lower support arm 510 is connected to the sliding block 340, and the front end extends by a predetermined length towards the front and is located below the clamp 200. The lower support arm provides a support position for the lower abutting part 520 and the standard pushing piece 530, and when the lower support arm moves in the up-down direction, the lower abutting part 520 and the standard pushing piece 530 can move up and down synchronously. In order to ensure the installation accuracy, the corresponding installation surfaces of the lower support arm 510 are finished, and the geometric tolerance of the installation surfaces of the upper support arm 410 is specifically referred to.

[0055] Please refer to Figure 1 、 Figure 2 、 Figure 3Further, the lower abutting part 520 of the embodiment specifically comprises a third shaft seat 521 and a lower contact rod 522, the third shaft seat 521 is arranged on the lower support arm 510, the lower contact rod 522 is arranged on the third shaft seat 521 and vertically extends upwards to above the lower support arm 510, and the lower contact rod 522 is located directly below the upper contact rod 422. In the specific structure, the lower contact rod 522 is fixed by the third shaft seat 521, so that the lower contact rod 522 penetrates the lower support arm upwards, realizes stable connection, and in order to ensure that the lower contact rod 522 is in a vertical state, each mounting surface of the lower support arm is finished, and the shape and position tolerances of each mounting surface are ensured. For specific requirements of the shape and position tolerances of the first shaft seat 421 mounted to the upper support arm 410, reference can be made.

[0056] Please refer to Figure 1 , Figure 2 , Figure 3 The standard pushing piece 530 of the embodiment specifically comprises a standard pushing rod 532, the standard pushing rod 532 is connected to the lower support arm 510 through a support table 531, and the standard pushing rod 532 is vertically upwards and abuts against the telescopic measuring rod 432 of the detection table 430. The standard pushing rod 532 is fixed in the vertical direction through the support table 531, so that the standard pushing rod 532 is located directly below the measuring rod 432. When measuring the thickness, the measuring rod 432 is pushed by the standard pushing rod 532 to make the measuring rod 432 extend and retract. The connecting hole of the lower support arm 510 and the support table 531 is finished, and the shape and position tolerances after assembly are ensured.

[0057] The standard pushing rod 532, the upper contact rod 422 and the lower contact rod 522 of the embodiment can all be made of 430 stainless steel, which is hard and not easy to deform in use.

[0058] Please refer to Figure 1 , Figure 2 , Figure 3 Further, the lower support arm 510 and the upper support arm 410 are both provided with a reinforcing rib plate 440. The reinforcing rib plate 440 is used to reduce the verticality error caused by the cantilever. The split frame is designed in structure and appearance, which combines the use habits of users, is convenient to use and safe, and greatly ensures the measurement accuracy and stability.

[0059] Please refer to Figure 5 , Figure 6Further, the vertical standard frame 300 is provided with a pushing cylinder 450 and a jacking cylinder 533, the pushing cylinder 450 is used to drive the upper detection assembly 400 to move up and down, and the jacking cylinder 533 is used to drive the lower abutting assembly 500 to move up and down. The pushing cylinder 450 and the jacking cylinder 533 can be respectively arranged on the left and right sides of the vertical standard frame 300, the piston rod of the pushing cylinder 450 is arranged upward, and the piston rod of the jacking cylinder 533 can be arranged downward. Please refer to Figure 4 、 Figure 6 Through the driving of the pushing cylinder 450 and the jacking cylinder 533, the upper detection assembly 400 and the lower abutting assembly 500 have a zero point correction state and a detection state. In the zero point correction state, the upper detection assembly 400 is lowered by the contraction of the pushing cylinder 450 to abut the upper contact piece 420 on the upper surface of the standard gauge block 20, the lower abutting assembly 500 is raised by the contraction of the jacking cylinder 533 to abut the lower abutting part 520 on the lower surface of the standard gauge block 20, and the standard pushing piece 530 is used to push the measuring rod 432 to calibrate the detection surface 430. In the detection state, the upper detection assembly 400 is lowered by the contraction of the pushing cylinder 450 to abut the upper contact piece 420 on the upper surface of the optical piece 10 to be detected, the lower abutting assembly 500 is raised by the extension of the jacking cylinder 533 to abut the lower abutting part 520 on the lower surface of the optical piece 10 to be detected, and the standard pushing piece 530 is used to push the measuring rod 432 to measure the detection surface 430.

[0060] Please refer to Figure 4 、 Figure 6 In the thickness detection of the optical piece 10, the upper support arm and the lower support arm 510 are driven by the pushing cylinder 450 and the jacking cylinder 533 to move up and down, so that the upper contact rod 422 and the lower contact rod 522 abut on the upper and lower surfaces of the optical piece 10 respectively, and then the standard pushing rod 532 is used to synchronously push the measuring rod 432 of the detection surface 430 to realize the measurement of the center thickness of the product part. In the driving process of the pushing cylinder 450 and the jacking cylinder 533, the input gas amount is controlled and adjusted, so as to control the moving speed of the upper support arm and the lower support arm 510 moving up and down and the measurement strength, so that the moving speed is slower and the strength of the upper contact rod 422 and the lower contact rod 522 pressing the optical piece 10 in the middle is smaller, and the detection of the center thickness of the optical lens is completed under the condition that the measurement accuracy and the product smoothness are not damaged.

[0061] In addition, by abutting the upper and lower contact rods 422 and 522 against the middle of the optical element 10, not only can lenses with flat bottom and surface be detected, but also the center thickness of lenses with spherical bottom and surface can be detected during all processes of milling and polishing. This can be applied to almost all types of lenses, improving the versatility of thickness detection.

[0062] The specific thickness measurement process is as follows:

[0063] Referring to Figure 4 , first, according to the size of the optical element 10 to be measured, a standard gauge block 20 with a thickness close to that of the optical element 10 is selected for zero correction. For example, if the thickness of the optical element 10 to be measured is X, a 30mm standard gauge block 20 is selected. The standard gauge block 20 is clamped on the three-jaw chuck 210, and then the upper contact rod 422 is lowered to contact the upper surface of the standard gauge block 20, and the lower contact rod 522 is raised to contact the lower surface of the standard gauge block 20. At this time, the standard push rod 532 is in contact with the measuring rod 432 of the detection table 430 for the first time and presses the measuring rod 432, and the reading of the detection table 430 at this time is adjusted to 0 (displayed as 0). After the standard gauge block 20 is removed from the three-jaw chuck 210, the optical element 10 to be measured is clamped on the three-jaw chuck 210, and then the upper contact rod 422 is lowered to contact the upper surface of the optical element 10, and the lower contact rod 522 is raised to contact the lower surface of the optical element 10. At this time, the standard push rod 532 is in contact with the measuring rod 432 of the detection table 430 for the second time and presses the measuring rod 432. If the length of the measuring rod 432 pressed by the second contact is longer than that of the measuring rod 432 pressed by the first contact, the display value of the detection table 430 at this time is -20mm, and the thickness X of the optical element 10 is equal to the thickness of the standard gauge block 20 plus the absolute value of the display value of the detection table 430 (i.e., the thickness of the standard gauge block 20 minus the display value of the detection table 430), so that the center thickness of the optical element 10 is 50mm. If the length of the measuring rod 432 pressed by the second contact is shorter than that of the measuring rod 432 pressed by the first contact, the display value of the detection table 430 at this time is 20mm, and the thickness X of the optical element 10 is equal to the thickness of the standard gauge block 20 minus the absolute value of the display value of the detection table 430 (i.e., the thickness of the standard gauge block 20 minus the display value of the detection table 430), so that the center thickness of the optical element 10 is 10mm.

[0064] In another scheme, the height of the standard push rod is adjustable or replaceable and is arranged on the support table 531. Since the standard push rod is in contact with the measuring rod 432 of the detection table 430 in the zero correction state and the detection state respectively, if the selected standard gauge block 20 is greatly different from the thickness of the optical part 10 to be measured, the standard push rod can not contact the measuring rod 432 in the second contact. Therefore, the standard push rod of different length or the height of the standard push rod can be replaced, so as to reduce the number of standard gauge blocks 20.

[0065] In summary, the center thickness gauge for optical parts provided by the present application adopts a split mounting structure, and higher measurement accuracy is ensured by precision machining (grinding treatment) of the assembly surface. The standard gauge block is used for calibration before measurement, so that the height of the standard gauge block is used as a reference for measurement, which can greatly reduce the moving stroke of the measuring rod of the detection table, can expand the measurement range of the center thickness of the optical part, and ensure the measurement accuracy. During the measurement process, the input air pressure of the air cylinder is controlled, so that the moving speed and moving force of the upper support arm and the lower support arm can be stably controlled, so as to avoid the stress on the surface of the optical part caused by the force of the upper contact rod and the lower contact rod contacting the surface of the product part, reduce the deformation on the surface of the optical part caused by the moving speed and moving force of the upper contact rod and the lower contact rod, and have the advantage of reducing the measurement error.

[0066] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A center thickness gauge for optical pieces, characterized in that, The utility model relates to a kind of optical element testing device, including: Base; Clamp, which is arranged on the base and used for clamping optical element to be tested; Vertical standard frame, which is arranged on the base; Upper detection assembly, which is movably arranged on the vertical standard frame in up-down direction and located above the clamp, the upper detection assembly includes upper contact and detection table, the upper contact moves synchronously with the detection table in up-down direction; Lower abutting assembly, which is movably arranged on the vertical standard frame in up-down direction and located below the clamp, the lower abutting assembly includes lower abutting part and standard pushing piece, the standard pushing piece moves synchronously with the lower abutting part in up-down direction; The upper contact and the lower abutting part abut on the upper and lower surfaces of optical element respectively, so that the standard pushing piece pushes the measuring rod of the detection table to extend and retract.

2. The center thickness gauge for optical pieces of claim 1, wherein, The vertical standard frame includes column frame body, which is vertically arranged on the base; Standard column, which is connected to the column frame body, the standard column is provided with guide rail in up-down direction; The upper detection assembly and the lower abutting assembly are movably connected to the guide rail by sliding block.

3. The center thickness gauge for optical pieces of claim 2, wherein, The upper detection assembly further includes upper support arm, which is movably arranged on the guide rail by sliding block and extends a predetermined length in a direction perpendicular to the standard column, the upper contact and the detection table are both connected to the upper support arm perpendicularly.

4. The center thickness meter for optical pieces of claim 3, wherein, The upper contact includes first shaft seat and upper contact rod, the first shaft seat is arranged on the upper support arm, and the upper contact rod is arranged on the first shaft seat and vertically extends downward below the upper support arm; The detection table includes second shaft seat and table body, the table body has measuring rod and performs thickness detection by extension and retraction of the measuring rod, the table body is connected to the upper support arm by second shaft seat, so that the measuring rod penetrates the upper support arm.

5. The center thickness meter for optical pieces of claim 3, wherein, The lower abutting assembly further includes lower support arm, which is movably arranged on the guide rail below the upper detection assembly by sliding block, the lower support arm extends a predetermined length in a direction perpendicular to the standard column, the lower abutting part and the standard pushing piece are both connected to the lower support arm perpendicularly.

6. The center thickness gauge for optical pieces of claim 5, wherein, The lower abutting part includes third shaft seat and lower contact rod, the third shaft seat is arranged on the lower support arm, and the lower contact rod is arranged on the third shaft seat and vertically extends upward above the lower support arm; The standard pushing piece includes standard pushing rod, which is arranged on the lower support arm, and the standard pushing rod vertically extends upward and abuts on the extendable measuring rod of the detection table; The height of the standard pushing rod is adjustable or replaceable and arranged on the support table of the lower support arm.

7. The center thickness meter for optical pieces of claim 5 wherein, Reinforcing rib plate is arranged on the lower support arm and the upper support arm.

8. The center thickness meter for optical pieces of claim 1, wherein, The vertical standard frame is provided with pushing cylinder, which is used to drive the upper detection assembly to move up and down; The vertical standard frame is provided with jacking cylinder, which is used to drive the lower abutting assembly to move up and down. The upper detection assembly and the lower abutting assembly have a zero-point correction state and a detection state through driving of the pushing cylinder and the jacking cylinder; In the zero-point correction state, the upper detection assembly is lowered through contraction of the pushing cylinder to abut the upper contact against an upper surface of a standard gauge block, and the lower abutting assembly is raised through contraction of the jacking cylinder to abut the lower abutting part against a lower surface of the standard gauge block, and the standard pushing piece is used to push the measuring rod to calibrate the detection surface; In the detection state, the upper detection assembly is lowered through contraction of the pushing cylinder to abut the upper contact against an upper surface of an optical piece to be detected, and the lower abutting assembly is raised through contraction of the jacking cylinder to abut the lower abutting part against a lower surface of the optical piece to be detected, and the standard pushing piece is used to push the measuring rod to measure the detection surface.

9. A center thickness gauge for optical elements as claimed in any of claims 1-8, characterized in that The clamp comprises a three-jaw chuck arranged on the base through rotation of a rotating disc; The clamp is provided with a detection through hole, and the clamp is used to clamp the optical piece to be detected so that the optical piece covers the detection through hole.

10. The center thickness meter for optical pieces of claim 9, wherein, The base comprises two parallel tables arranged side by side and spaced apart, and a clearance space is formed between the two parallel tables, and the lower abutting part and the standard pushing piece are located in the clearance space and move up and down; A support is connected to the two parallel tables respectively on two sides, the support is suspended above the clearance space, and the clamp is horizontally arranged on the support.

Images