Method for measuring rough machining curvature radius of sapphire concave and convex lenses

A curvature radius, sapphire technology, applied in the measurement field of sapphire concave and convex lens rough machining radius of curvature, can solve the problems of large measurement error, unclear projection image, unclear curved lines of sapphire convex lens, etc., to achieve convenient operation and convenient curvature radius Effect

Inactive Publication Date: 2011-03-30
CHONGQING CHUANYI AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the surface of the sapphire lens is relatively rough during rough machining (Rz0.8~Rz3.2), and the sapphire lens has a large diameter (lens diameter ≥ 10.00mm, tolerance ± 0.10mm), the above method has the following disadvantages: For spherometer testing, direct contact between the surface of the sapphire lens and the spherometer may easily damage the ruby ​​measuring head of the spherometer (the ruby ​​measuring head is relatively expensive), and it is not suitable for batch testing on the production site; a 50-fold horizontal projector is used for testing, due to The maximum measurement range of the 50x horizontal projector is 7.00mm, and the sapphire lens with a diameter ≥ 7.00mm cannot be fully projected. In ad...

Method used

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  • Method for measuring rough machining curvature radius of sapphire concave and convex lenses
  • Method for measuring rough machining curvature radius of sapphire concave and convex lenses
  • Method for measuring rough machining curvature radius of sapphire concave and convex lenses

Examples

Experimental program
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Effect test

Embodiment 1

[0037] If the radius of curvature of the sapphire convex lens is SR10, SR12, SR15, SR18, SR20, SR22, SR25, the tolerance is ±0.10, and the value of D2 of the designed measuring tool is φ12±0.01, the calculated Hmax and Hmin values ​​are shown in the following table:

[0038] SR±0.10

D2±0.01

Hmax

Hmin

10

φ12

2.0216

1.9791

[0039] 12

φ12

1.6204

1.5953

15

φ12

1.2593

1.2454

18

φ12

1.0338

1.0252

20

φ12

0.9245

0.9180

22

φ12

0.8365

0.8315

25

φ12

0.7325

0.7289

[0040] When measuring, you only need to check whether the H value in the table is between Hmax and Hmin to judge whether the curvature radius SR value is qualified, and it is very simple and convenient to use.

[0041] When the DUT 5 is a concave lens, refer to Figure 5 and Image 6 , using the same measurement method as the measurement...

Embodiment 2

[0043] If the radius of curvature of the sapphire convex lens is SR10, SR12, SR15, SR18, SR20, SR22, SR25, the tolerance is ±0.10, and the value of D3 of the designed measurement tool is φ16±0.01, the calculated Hmax and Hmin values ​​are shown in the following table:

[0044] SR±0.10

D3±0.01

Hmax

Hmin

10

16

4.0613

3.9413

12

16

3.0858

3.0264

15

16

2.3266

2.2965

18

16

1.8847

1.8664

20

16

1.6767

1.6628

22

16

1.5115

1.4988

25

16

1.3184

1.3107

[0045] When measuring, you only need to check whether the H value in the table is between Hmax and Hmin to judge whether the curvature radius SR value is qualified, and it is very simple and convenient to use.

[0046] The detection method of the present invention is compared with the detection methods such as spherometer, 50 times horizontal projector, ...

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Abstract

The invention relates to a method for measuring rough machining curvature radius of sapphire concave and convex lenses, comprising the following steps: the measuring rod of a micrometer gauge penetrates through the upper-half hole of a detection bracket; a measuring head of the micrometer gauge extends out of the detection bracket to form a dedicated measuring device of the rough machining curvature radius of the sapphire lens; the dedicated measuring device is placed on an inspection panel and is adjusted to zero; the dedicated measuring device is used for detecting the curvature radius of the sapphire concave lens or the sapphire concave lens; and whether the curvature radius of the detected sapphire lens is qualified or not according to the numerical value of Hmax and Hmin. The method of the invention can ensure that the curvature radius of the lens can be accurately measured in the rough machining process of the sapphire lens, has the advantages of simple and rapid operation, and is extremely suitable for batch detection in production fields, wherein the diameter is more than or equal to 10.00mm, and the tolerance is +/-0.10mm.

Description

technical field [0001] The invention relates to a measuring method, in particular to a measuring method for the rough machining curvature radius of large-diameter sapphire concave and convex lenses. Background technique [0002] During the rough processing of sapphire lenses, we often encounter the problem of rapid batch measurement of the radius of curvature of large-diameter lenses (lens diameter ≥ 10.00mm, tolerance ± 0.10mm). [0003] The radius of curvature of the sapphire lens can be tested with a spherometer, a 50x horizontal projector or a universal tool microscope. Since the surface of the sapphire lens is relatively rough during rough machining (Rz0.8~Rz3.2), and the sapphire lens has a large diameter (lens diameter ≥ 10.00mm, tolerance ± 0.10mm), the above method has the following disadvantages: For spherometer testing, direct contact between the surface of the sapphire lens and the spherometer may easily damage the ruby ​​measuring head of the spherometer (the r...

Claims

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Application Information

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IPC IPC(8): G01B5/213
Inventor 牟方财柏教林邓远东
Owner CHONGQING CHUANYI AUTOMATION
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