Measuring device capable of measuring difference between center thickness and equal-height edge thickness of infrared lens

Abstract

The utility model relates to the technical field of infrared lens thickness measurement, and discloses a measuring device capable of measuring the center thickness and equal-height edge thickness difference of an infrared lens, which comprises a placing platform for placing a lens to be measured and a thickness measuring assembly for measuring the thickness of the lens to be measured, the thickness measuring assembly is provided with a fixing unit capable of moving on the placing platform and a locking piece located above the fixing unit, the fixing unit is provided with a positioning part used for positioning a to-be-measured lens, and the fixing unit can be pressed on the placing platform through the locking piece. The fixing unit is used for fixing the center or the edge of the to-be-measured lens under the measuring head of the thickness measuring assembly, the fixing unit is moved on the placing platform, and the fixing unit is pressed tightly through the locking piece, so that the center or the edge of the to-be-measured lens can be adjusted to be located under the measuring head fixed on the thickness measuring assembly for thickness measurement, and the thickness of the to-be-measured lens can be accurately measured. The device can measure the center thickness or equal-height edge thickness difference of the to-be-measured lens, and is simple in structure and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of infrared lens thickness measurement technology, specifically a measuring device that can measure the center thickness and the thickness difference at the same height edges of an infrared lens. Background Technology

[0002] The center thickness and edge thickness difference of an infrared lens have a significant impact on its performance. The center thickness directly affects the light focusing ability; a thicker center thickness may cause the light to focus further away, thus affecting imaging accuracy, while an excessively thin lens may cause blurry images. On the other hand, the edge thickness difference leads to uneven refraction of light within the lens, increasing aberrations and reducing the quality and sharpness of infrared imaging. In addition, thickness differences may also cause variations in the physical properties of the lens under temperature changes, affecting its stability and durability. Therefore, measuring the center thickness and edge thickness difference of an infrared lens is crucial for improving imaging quality and equipment performance. Measuring thickness can also help optimize lens design, control manufacturing quality, and ensure the thermal stability of the lens under different temperature environments, ultimately improving the performance and reliability of the entire optical system.

[0003] In the prior art, utility model patent (CN221055689U) discloses a micro-optical lens thickness detection device, including a base, a support frame, a height adjustment mechanism, a detection instrument, and a positioning mechanism. The support frame is vertically arranged on one side of the base, the height adjustment mechanism is arranged on the support frame, the detection instrument is arranged above the height adjustment mechanism, and the probe of the detection instrument is perpendicular to the base. The positioning mechanism is arranged on the base at a position corresponding to the probe. This detection device can only measure the center thickness of the micro-lens.

[0004] Based on this, the technical problem to be solved in this case is: how to use a device to measure the center thickness and the thickness difference at the same height edges of an infrared lens. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a measuring device for measuring the center thickness and edge thickness difference of an infrared lens. This measuring device moves a fixing unit on a placement platform and presses the fixing unit onto the placement platform by a locking member. The lens to be measured can be positioned by a positioning part, and the center or edge of the lens to be measured is fixed directly below the measuring head of the thickness measuring component by the fixing unit. This makes it convenient for operators to measure the center thickness or edge thickness difference of the lens to be measured. The structure is simple and easy for operators to operate.

[0006] The technical solution of this utility model is:

[0007] A measuring device for measuring the center thickness and edge thickness difference of an infrared lens includes a placement platform for placing the lens to be measured, a thickness measuring component for measuring the thickness of the lens to be measured, the thickness measuring component being connected to the placement platform, a fixing unit movable on the thickness measuring component, a locking member located above the fixing unit, a positioning part for positioning the lens to be measured on the fixing unit, the fixing unit being pressed onto the placement platform by the locking member, and the fixing unit being used to fix the center or edge of the lens to be measured directly below the measuring head of the thickness measuring component.

[0008] Preferably, the thickness measuring assembly includes a bracket and a thickness gauge. The bracket is connected above the placement platform, and the bracket is provided with an adjustment unit. The thickness gauge is connected to the adjustment unit, which is used to adjust the position of the thickness gauge. The fixing unit is located at the bottom of the bracket, and the locking element is located on the bracket and above the fixing unit.

[0009] Preferably, the adjustment unit includes a clamping block, with a first clamping part and a second clamping part respectively provided at both ends of the clamping block. The clamping block is connected to the bracket through the first clamping part and to the thickness gauge through the second clamping part.

[0010] Preferably, the locking element includes a threaded sleeve, which is threadedly connected to the bracket.

[0011] Preferably, the fixing unit includes a fixing plate, one end of which is provided with an adjustment groove, and the positioning part is located at the other end of the fixing plate;

[0012] When the locking element presses the fixing plate against the placement platform, the fixing plate is fixed on the placement platform; when the locking element is not in contact with the fixing plate, the fixing plate can move on the placement platform.

[0013] Preferably, the positioning part is a V-groove.

[0014] Preferably, it also includes a support mechanism for supporting the lens to be tested, the support mechanism including a base and a pin detachably connected to the base, the pin being used to support the lens to be tested.

[0015] Preferably, the top of the ejector pin is made of ruby.

[0016] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:

[0017] This invention allows the fixed unit to be moved on the placement platform and pressed onto the placement platform by the locking member. The lens to be tested can be positioned by the positioning part, and the center or edge of the lens to be tested can be fixed directly below the measuring head of the thickness measuring component by the fixed unit. This makes it convenient for staff to measure the center thickness or the thickness difference between the same height and the edge of the lens to be tested. The structure is simple and easy for staff to operate. Attached Figure Description

[0018] Figure 1 This is a perspective view of the center thickness measurement in Embodiment 1 of this utility model;

[0019] Figure 2 for Figure 1 Top view;

[0020] Figure 3 This is a perspective view of the center thickness measurement in Embodiment 2 of this utility model;

[0021] Figure 4 for Figure 3 Top view;

[0022] Figure 5 for Figure 4 AA section view;

[0023] Figure 6 This is a perspective view of measuring the thickness difference at the same height edges in Embodiment 1 of this utility model;

[0024] Figure 7 for Figure 6 Top view.

[0025] The reference numerals for each of the attached figures are as follows: 1. Placement platform; 2. Thickness measuring component; 3. Support mechanism; 4. Lens to be measured; 5. Biconcave infrared lens; 21. Fixing unit; 22. Locking component; 23. Bracket; 24. Thickness gauge; 25. Adjustment unit; 251. First clamping part; 252. Second clamping part; 31. Base; 32. Ejector pin; 211. Positioning part; 212. Fixing plate; 213. Adjustment groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] Please see Figure 1-7A measuring device for measuring the center thickness and edge thickness difference of an infrared lens includes a placement platform 1 for placing a lens 4 to be measured, and a thickness measuring component 2 for measuring the thickness of the lens 4. The thickness measuring component 2 is connected to the placement platform 1. The thickness measuring component 2 is provided with a fixing unit 21 that can move on the placement platform 1 and a locking member 22 located above the fixing unit 21. The fixing unit 21 is provided with a positioning part 211 for positioning the lens 4 to be measured. The fixing unit 21 can be pressed onto the placement platform 1 by the locking member 22. The fixing unit 21 is used to fix the center or edge of the lens 4 to be measured directly below the measuring head of the thickness measuring component 2.

[0029] In actual operation, the staff adjusts the fixing unit 21 according to the data to be measured. Specifically, the fixing unit 21 is moved on the placement platform 1. For greater accuracy, the lens to be tested 4 can be positioned by the positioning part 211, which makes it easier for the staff to determine whether the center or edge of the lens to be tested 4 is directly below the probe of the thickness measuring component 2. Then, the fixing unit 21 is pressed onto the placement platform 1 by the locking part 22, so that when the lens to be tested 4 is fixed by the fixing unit 21, the center or edge of the lens to be tested 4 is directly below the probe of the thickness measuring component 2. Then, the thickness measuring component 2 is used to measure the center thickness or edge thickness of the lens to be tested 4. In particular, when testing the thickness difference of the same height edge, the lens to be tested 4 can be taken out, rotated at a certain angle, and then fixed by the fixing unit 21 for measurement. Thus, the thickness difference of the same height edge of the lens to be tested 4 can be measured. This measuring device can measure the center thickness and thickness difference of the same height edge of the lens to be tested 4. It has a simple structure and is easy for the staff to operate.

[0030] It should be noted that the lens 4 to be tested in this embodiment is an infrared lens, and it can be a biconvex lens, a single-sided concave lens, a single-sided convex lens, a plane lens, or other infrared lenses that can be placed flat on the placement platform 1. Because the parameters of the infrared lens, such as the sag, center thickness, total thickness, curvature, and edge thickness difference, need to be within the design range, this measuring device can measure a variety of thickness parameters, which is convenient for operators.

[0031] Preferably, the thickness measuring component 2 includes a bracket 23 and a thickness gauge 24. The bracket 23 is connected above the placement platform 1. An adjustment unit 25 is provided on the bracket 23. The thickness gauge 24 is connected to the adjustment unit 25. The adjustment unit 25 is used to adjust the position of the thickness gauge 24. The fixing unit 21 is located at the bottom of the bracket 23. The locking member 22 is located on the bracket 23 and above the fixing unit 21.

[0032] In the above design, the bracket 23 provides support for the thickness gauge 24, and the position of the thickness gauge 24 can be adjusted by the adjustment unit 25. Specifically, the thickness gauge 24 is positioned at the height of the bracket 23, so that the thickness gauge 24 can measure the thickness of the lens 4 to be measured. More specifically, when measuring the center thickness, the position of the thickness gauge 24 can be adjusted after fixing the lens 4 to make the probe of the thickness gauge 24 contact the lens 4 to be measured, and the center thickness can be measured. When measuring the edge thickness difference at the same height, the edge thickness at a certain height of the lens 4 can be measured, and then the position of the thickness gauge 24 does not need to be adjusted. The lens 4 to be measured only needs to be taken out, rotated at a certain angle, and then fixed again by the fixing unit 21. Repeating this process multiple times can measure the edge thickness difference at the same height. The thickness gauge 24 can measure the center thickness or the edge thickness difference at the same height.

[0033] Preferably, the adjustment unit 25 includes a clamping block, with a first clamping part 251 and a second clamping part 252 respectively at both ends. The clamping block is connected to the bracket 23 through the first clamping part 251 and to the thickness gauge 24 through the second clamping part 252.

[0034] In this embodiment, the clamping block can be adjusted on the bracket 23 via the first clamping part 251, and the thickness gauge 24 can be adjusted via the second clamping part 252, thereby facilitating the operation of the staff to adjust the position of the thickness gauge 24.

[0035] Preferably, the locking member 22 includes a threaded sleeve, which is threadedly connected to the bracket 23.

[0036] In this embodiment, the operator can press the fixing unit 21 onto the placement platform 1 or loosen the fixing unit 21 by rotating the threaded sleeve, so as to facilitate the movement of the fixing unit 21, which is beneficial to the operator's operation.

[0037] Preferably, the fixing unit 21 includes a fixing plate 212, one end of which is provided with an adjustment groove 213, and the positioning part 211 is located at the other end of the fixing plate 212; when the locking member 22 presses the fixing plate 212 onto the placement platform 1, the fixing plate 212 is fixed on the placement platform 1; when the locking member 22 is not in contact with the fixing plate 212, the fixing plate 212 can move on the placement platform 1.

[0038] In this embodiment, the bottom of the bracket 23 is located in the adjustment groove 213, so that the fixing plate 212 can move on the placement platform 1 without the locking member 22 pressing the fixing plate 212, thereby adjusting the position of the fixing plate 212, and fixing the center or edge of the lens to be tested 4 directly below the thickness measurement of the thickness gauge 24, which is beneficial for the thickness gauge 24 to measure the center thickness or the edge thickness of the lens to be tested 4.

[0039] Preferably, the positioning part 211 is a V-groove.

[0040] Through the above design, the V-groove can fix the test lens 4 of different sizes in the V-groove. When the fixing unit 21 is pressed on the placement platform 1 by the locking member 22, the V-groove is also in a fixed state. The test lens 4 is fixed by contacting the inner side of the opening of the V-groove.

[0041] Example 2

[0042] The difference between this embodiment and embodiment 1 is that the lens 4 to be tested in this embodiment is a double concave infrared lens 5.

[0043] Preferably, it also includes a support mechanism 3 for supporting the lens 4 to be tested. The support mechanism 3 includes a base 31 and a pin 32 detachably connected to the base 31. The pin 32 is used to support the lens 4 to be tested.

[0044] In actual operation, since the center thickness cannot be measured by placing the double concave infrared lens 5 on the placement platform 1, the center thickness is supported by the support mechanism 3 to assist in measuring the center thickness. Specifically, the operator presses the base 31 and the positioning part 211 tightly, and moves the fixing plate 212 so that the center of the ejector pin 32 is in the same straight line as the probe of the thickness gauge 24. Then, the fixing plate 212 is pressed tightly on the placement platform 1 by the locking part 22, the zero point of the probe is adjusted to the top of the ejector pin 32, and then the center of the double concave infrared lens 5 is placed on the ejector pin 32. With the support of the ejector pin 32, the center thickness of the double concave infrared lens 5 is measured by the thickness gauge 24.

[0045] Preferably, the top of the ejector pin 32 is made of ruby.

[0046] Through the above design, the ruby ​​material can better protect the double concave infrared lens 5, preventing scratches on the lens and affecting the quality of the infrared lens.

[0047] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A measuring device for measuring the center thickness and edge thickness difference of an infrared lens, comprising a placement platform for placing the lens to be measured, and a thickness measuring component for measuring the thickness of the lens to be measured, wherein the thickness measuring component is connected to the placement platform, characterized in that, The thickness measuring assembly is equipped with a fixing unit that can move on the placement platform and a locking member located above the fixing unit. The fixing unit is equipped with a positioning part for positioning the lens to be measured. The fixing unit can be pressed onto the placement platform by the locking member. The fixing unit is used to fix the center or edge of the lens to be measured directly below the measuring head of the thickness measuring assembly.

2. The measuring device for measuring the center thickness and edge thickness difference of an infrared lens according to claim 1, characterized in that, The thickness measuring assembly includes a bracket and a thickness gauge. The bracket is connected above the placement platform. The bracket is equipped with an adjustment unit, and the thickness gauge is connected to the adjustment unit. The adjustment unit is used to adjust the position of the thickness gauge. The fixing unit is located at the bottom of the bracket, and the locking element is located on the bracket and above the fixing unit.

3. The measuring device for measuring the center thickness and edge thickness difference of an infrared lens according to claim 2, characterized in that, The adjustment unit includes a clamping block, with a first clamping part and a second clamping part at each end. The clamping block is connected to the bracket through the first clamping part and to the thickness gauge through the second clamping part.

4. The measuring device for measuring the center thickness and edge thickness difference of an infrared lens according to claim 2, characterized in that, The locking component includes a threaded sleeve, which is threadedly connected to the bracket.

5. The measuring device for measuring the center thickness and edge thickness difference of an infrared lens according to claim 1, characterized in that, The fixing unit includes a fixing plate, one end of which is provided with an adjustment groove, and the positioning part is located at the other end of the fixing plate; When the locking member presses the fixing plate against the placement platform, the fixing plate is fixed on the placement platform; when the locking member is not in contact with the fixing plate, the fixing plate can move on the placement platform.

6. The measuring device for measuring the center thickness and edge thickness difference of an infrared lens according to claim 5, characterized in that, The positioning part is a V-shaped groove.

7. The measuring device for measuring the center thickness and edge thickness difference of an infrared lens according to claim 1, characterized in that, It also includes a support mechanism for supporting the lens under test, the support mechanism including a base and a pin detachably connected to the base, the pin being used to support the lens under test.

8. The measuring device for measuring the center thickness and edge thickness difference of an infrared lens according to claim 7, characterized in that, The top of the pin is made of ruby.

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