Lens processing quality detection method and system

Abstract

The invention relates to the technical field of optical device detection, in particular to a lens processing quality detection method and system. Comprising the following steps: enabling detection light to enter a to-be-detected lens, and obtaining a transmission light spot at the light outlet side of the to-be-detected lens; judging whether the transmission light spot has a special shape or not, and if yes, judging that the current to-be-detected lens is unqualified; if the special shape does not exist, judging that the current to-be-detected lens is qualified; according to the invention, the detection light is arranged on the light incident side of the to-be-detected lens, the transmission light spot formed by the lens is obtained on the light emergent side of the to-be-detected lens, and whether the processing quality of the lens is qualified can be judged by observing whether the contour of the transmission light spot is abnormal; if the transmission light spot is clear in outline and regular in shape, it can be judged that the surface of the lens is smooth, and the machining quality is qualified; if the outline of the transmission light spot is not clear and abnormal, judging that the surface of the lens is rough and the processing quality is not qualified; the method is simple to operate, the detection result is easy to judge, and the method is suitable for large-scale detection and screening.

Description

Technical Field

[0001] The present invention relates to the technical field of optical device detection, and in particular to a lens processing quality detection method and system. Background Art

[0002] The performance of optical components directly affects the performance of the final optical system, especially for some complex optical systems, which have very high requirements for lens quality. By testing the processing quality of the lens, it can be ensured that the surface quality and surface flatness of the optical component meet the design requirements, thereby ensuring the performance and efficiency of the optical system. At present, the processing quality inspection of the lens generally relies on the naked eye inspection and subjective judgment of the staff. Not only is the inspection process complicated, but the inspection results are also difficult to judge.

[0003] Therefore, it is urgent to design a lens processing quality detection method and system that is simple to operate and easy to determine the detection results to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a lens processing quality detection method and system with simple operation and easy detection results to solve the problem that the detection process is complicated and the detection results are difficult to determine in the prior art.

[0005] The present invention discloses a lens processing quality detection method, which comprises the following steps:

[0006] The detection light is incident on the lens to be tested, and a transmission light spot is obtained on the light exit side of the lens to be tested;

[0007] Determine whether the transmitted light spot has any abnormal shape. If so, the current lens to be tested is considered unqualified.

[0008] If there is no abnormal shape, the current lens to be tested is determined to be qualified.

[0009] Optionally, the irregular shape includes corrugations or interference fringes.

[0010] Optionally, the detection light is a collimated light beam with a wavelength of 1550 nm.

[0011] Optionally, the method further comprises the following steps:

[0012] The transmission light spot of the lens to be tested is obtained by a light spot analyzer.

[0013] Optionally, the distance between the light spot analyzer and the lens to be measured is 8 cm-12 cm.

[0014] Optionally, the detection light is infrared collimated light, and the method further includes the following steps:

[0015] The transmitted light spot of the lens to be tested is obtained through a white screen.

[0016] Optionally, the distance between the white screen and the lens to be tested is 1m-1.4m.

[0017] Optionally, the lens is an aspherical lens.

[0018] In order to solve the problems existing in the prior art, the present invention also provides a lens processing quality detection system, which is used to implement any of the lens processing quality detection methods described above, including a laser, a collimator and a light spot receiving device, and a detection position for placing the lens to be tested is arranged between the collimator and the light spot receiving device.

[0019] Optionally, the light spot receiving device is a light spot analyzer or a white screen.

[0020] Compared with the prior art, the lens processing quality detection method provided by the embodiment of the present invention has the beneficial effect of: by setting the detection light on the light incident side of the lens to be tested, and making the detection light enter the lens to be tested, and by obtaining the transmission light spot formed by the lens on the light exit side of the lens to be tested, by observing whether the contour of the transmission light spot is irregular, it can be judged whether the surface of the lens is rough, thereby judging whether the processing quality of the lens is qualified; if the contour of the transmission light spot is clear and the shape is regular, it can be judged that the surface of the lens is smooth, and then the processing quality of the lens is qualified; if the contour of the transmission light spot is unclear and irregular, it can be judged that the surface of the lens is rough, and then the processing quality of the lens is unqualified; this method is simple to operate and the detection result is easy to judge, which is suitable for large-scale detection and screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0022] Figure 1 is a flow chart of a lens processing quality detection method provided by an embodiment of the present invention;

[0023] Figure 2 The unqualified transmission spot provided by the embodiment of the present invention Figure 1 ;

[0024] Figure 3 This is the qualified transmission light spot provided by the embodiment of the present invention. Figure 1 ;

[0025] Figure 4 The unqualified transmission spot provided by the embodiment of the present invention Figure 2 ;

[0026] Figure 5 It is a qualified transmission light spot provided by the embodiment of the present invention Figure 2 ;

[0027] Figure 6 The structure of the lens processing quality detection system provided by the embodiment of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 7 The structure of the lens processing quality detection system provided by the embodiment of the present invention is shown in FIG. Figure 2 .

[0029] The reference numerals in the figures are:

[0030] 100. Laser; 200. Collimator; 300. Light spot receiving device; 10. Lens to be tested. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present invention is described in detail.

[0032] like Figures 1 to 5 As shown, the present invention provides a specific embodiment of a lens processing quality detection method.

[0033] A lens processing quality detection method, reference Figure 1 , the lens processing quality detection method includes the following steps:

[0034] S1, incident the detection light onto the lens to be tested, and obtaining a transmission light spot on the light exit side of the lens to be tested;

[0035] S2, judging whether the transmitted light spot has an irregular shape, and if so, judging that the current lens to be tested is unqualified;

[0036] S3. If there is no abnormal shape, the current lens to be tested is determined to be qualified.

[0037] Specifically, the performance of optical components directly affects the performance of the final optical system. Especially for some complex optical systems, very high requirements are placed on the quality of the lens. By testing the processing quality of the lens, the performance and efficiency of the entire optical system can be ensured. The lens processing quality detection method is used to detect the processing quality of large-size aspheric lenses.

[0038] Since the smoothness of the lens surface has a great influence on the transmitted light spot of the lens, if the surface of the lens is rough, when the detection light passes through, the detection light will be scattered on the lens surface, and these scattered lights will cause the transmitted light beam to diverge, causing the transmitted light spot to become blurred; and the rough surface makes it difficult to maintain the shape and collimation of the light beam, thereby causing the transmitted light spot to be distorted or deformed to form an irregular light spot; on the contrary, if the surface of the lens is smooth, when the detection light passes through, the detection light will be evenly transmitted on the lens surface, which can effectively avoid the detection light from being absorbed and scattered, thereby maintaining the focusing performance of the light beam, making the transmitted light spot uniform and with a clear outline; and the smooth surface helps to maintain the shape and collimation of the light beam, so that the shape of the transmitted light spot is regular and the edge is smooth.

[0039] Therefore, by setting the detection light on the light incident side of the lens to be tested, and making the detection light enter the lens to be tested, and by obtaining the transmission light spot formed by the lens on the light exit side of the lens to be tested, and finally by observing whether the outline of the transmission light spot is clear and the shape is regular, it can be judged whether the surface of the lens is smooth, and thus whether the processing quality of the lens is qualified; if the outline of the transmission light spot is clear and the shape is regular, it can be judged that the surface of the lens is smooth, and then the processing quality of the lens is qualified; if the outline of the transmission light spot is unclear and has an irregular shape, it can be judged that the surface of the lens is rough, and then the processing quality of the lens is unqualified.

[0040] Solution 1

[0041] A collimated light beam with a wavelength of 1550 nm is used as the detection light, and a light spot analyzer is used to obtain the transmission light spot of the lens to be tested.

[0042] Specifically, the collimated light beam can use light in the C band, which can be selected according to the specifications of the lens to be tested, and is preferably 1550nm; a collimated light beam with a wavelength of 1550nm usually has good penetrability, so that the detection light is not excessively absorbed after passing through the lens, and the imaging system has higher resolution and sensitivity within the 1550nm wavelength range. Using a collimated light beam with a wavelength of 1550nm for detection is more conducive to subsequent imaging, and can make the transmitted light spot clearer and easier to observe.

[0043] refer to Figure 2 When the surface of the lens is rough, the detection light will be scattered on the lens surface, causing the transmitted light spot to become blurred; and the rough lens surface is difficult to maintain the shape and collimation of the light beam, which will cause the transmitted light spot to be distorted or deformed, resulting in some small ripple peaks on the light spot.

[0044] refer to Figure 3When the surface of the lens is smooth, the detection light will be evenly transmitted on the lens surface, so that the transmitted light spot is uniform and has a clear outline, and the smooth lens surface helps to maintain the shape and collimation of the light beam, so that the transmitted light spot has a regular shape and smooth edges.

[0045] The distance between the light spot analyzer and the lens to be tested is 8 cm-12 cm, so that the detection light forms an image on the light spot analyzer after passing through the lens.

[0046] Solution 2

[0047] Infrared collimated light is used as the detection light, and a white screen is used to obtain the transmission light spot of the lens to be tested.

[0048] Specifically, infrared collimated light usually has a good penetration depth. Compared with visible light, infrared light can penetrate deeper into the lens to achieve better penetration. Infrared light also has certain anti-interference and thermal properties, which makes the entire detection process more stable, thereby improving the accuracy of detection, and then improving the clarity of the transmitted light spot, making it easier to observe.

[0049] refer to Figure 4 When the surface of the lens is rough, the detection light will be scattered on the lens surface, causing the transmitted light spot to become blurred; and the rough lens surface is difficult to maintain the shape and collimation of the light beam, which will cause the transmitted light spot to be distorted or deformed, resulting in some interference fringes on the transmitted light spot.

[0050] refer to Figure 5 When the surface of the lens is smooth, the detection light will be evenly transmitted on the lens surface, so that the transmitted light spot is uniform and has a clear outline, and the smooth lens surface helps to maintain the shape and collimation of the light beam, so that the transmitted light spot has a regular shape and smooth edges.

[0051] The distance between the white screen and the lens to be tested is 1m-1.4m, so that the detection light forms an image on the white screen after passing through the lens.

[0052] like Figure 6 and Figure 7 As shown, the present invention provides a specific embodiment of a lens processing quality detection system.

[0053] A lens processing quality inspection system, reference Figure 6 and Figure 7The lens processing quality detection system is used to implement any of the lens processing quality detection methods shown above. The lens processing quality detection system includes a laser 100, a collimator 200 and a light spot receiving device 300. A detection position for placing the lens 10 to be tested is arranged between the collimator 200 and the light spot receiving device 300; the laser 100 is used to emit detection light, and the collimator 200 is used to collimate the detection light to provide collimated detection light; the light spot receiving device 300 is used to receive the transmitted light spot of the lens 10, so as to analyze and determine the processing quality of the lens 10.

[0054] The light spot receiving device 300 is a light spot analyzer or a white screen. Figure 6 When the light spot receiving device 300 is a light spot analyzer, a collimated light beam with a wavelength of 1550 nm is used as the detection light, and the distance between the light spot analyzer and the lens to be measured 10 is preferably 10 cm; Figure 7 When the light spot receiving device 300 is a white screen, infrared collimated light is used as the detection light, and the distance between the white screen and the lens to be tested 10 is preferably 1.2 m.

[0055] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A lens processing quality detection method, characterized in that: The following steps are involved: The detection light is incident on the lens to be tested, and a transmission light spot is obtained on the light exit side of the lens to be tested; Determine whether the transmitted light spot has any abnormal shape. If so, the current lens to be tested is considered unqualified. If there is no abnormal shape, the current lens to be tested is determined to be qualified.

2. The lens processing quality detection method according to claim 1, characterized in that: The irregular shapes include corrugations or interference fringes.

3. The lens processing quality detection method according to claim 1, characterized in that: The detection light is a collimated light beam with a wavelength of 1550 nm.

4. The lens processing quality detection method according to claim 3, characterized in that: The following steps are also included: The transmission light spot of the lens to be tested is obtained by a light spot analyzer.

5. The lens processing quality detection method according to claim 4, characterized in that: The distance between the light spot analyzer and the lens to be measured is 8 cm-12 cm.

6. The lens processing quality detection method according to claim 1, characterized in that: The detection light is infrared collimated light; and the following steps are also included: The transmitted light spot of the lens to be tested is obtained through a white screen.

7. The lens processing quality detection method according to claim 6, characterized in that: The distance between the white screen and the lens to be tested is 1m-1.4m.

8. The lens processing quality detection method according to claim 7, characterized in that: The lens is an aspherical lens.

9. A lens processing quality detection system, characterized in that: The method for detecting the processing quality of a lens according to any one of claims 1 to 8 comprises a laser, a collimator and a light spot receiving device, wherein a detection position for placing the lens to be tested is arranged between the collimator and the light spot receiving device.

10. The lens processing quality detection method according to claim 9, characterized in that: The light spot receiving device is a light spot analyzer or a white screen.

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