Lens multi-object-distance multi-parameter automatic detection system

Abstract

The utility model discloses a lens multi-object-distance multi-parameter automatic detection system, which is characterized by comprising a box body, a plurality of transparent targets which are arranged in the box body and are overlapped in position, and a light source used for illuminating the targets, target patterns are arranged on the targets, a detection hole is arranged on the box body, and the detection hole is communicated with the box body. All the target patterns, located in the same detection range, on the different targets are arranged in a staggered mode, and the lens module can shoot all the target patterns in the detection range through the detection holes. According to the above structure, the problem that the lens module needs to be moved for multiple times when the close-up lens carries out real shooting on multiple object distances is solved, the test efficiency is improved, the problem of test result difference caused by the fact that each object distance needs to use one light source and the difference between the light sources is solved, and the space occupied by detection is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a lens detection system, in particular to a multi-object distance and multi-parameter automatic detection system for lenses. Background Art

[0002] At present, some types of lenses are used for close-range shooting, such as endoscope lenses, face recognition lenses, etc. The existing detection methods are to place a target and a light source at a certain object distance in front of the lens module for actual shooting detection; generally, it is necessary to actually shoot at more than two object distances to ensure the imaging quality of the lens module within the depth of field; for the convenience of detection, the detection of such lenses at present is to fix the target and light source at each object distance in a row in front of the lens module, and move the lens module to directly below the target at the corresponding object distance for actual shooting during detection. If three object distances are to be detected, the lens module needs to be moved three times, which affects the detection efficiency and is not conducive to automatic detection. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a multi-object distance and multi-parameter automatic detection system for lenses.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A multi-object distance and multi-parameter automatic detection system for lenses, characterized in that: it includes a box body and a number of transparent and overlapping targets arranged in the box body, a light source for illuminating the targets, target patterns are arranged on all the targets, a detection hole is provided on the box body, and all the target patterns within the same detection range on different targets are arranged in a staggered manner, and the lens module can capture all the target patterns within the detection range through the detection hole.

[0006] There are two detection holes, and there are four targets. The four targets are divided into two target groups, and one detection hole detects a corresponding target group.

[0007] It further includes a linear motion system, and the box body or the lens module can move under the drive of the linear motion system.

[0008] The linear motion system includes a servo motor, a guide rail assembly and a lead screw assembly. The box body is connected to the guide rail assembly and the lead screw assembly, and the servo motor is connected to the lead screw assembly.

[0009] It further includes a lifting system, and the lens module is lifted by the lifting system.

[0010] A step surface is provided on the inner wall of the box body, and the target is fixed on the step surface.

[0011] The light source is a surface light source.

[0012] The surface light source includes a circuit board and LED chips soldered on the circuit board. A support boss is provided on the inner wall of the box body, and the circuit board is placed on the support boss and pressed by a cover plate.

[0013] The beneficial effects of the present utility model are as follows: All the transparent targets of the present utility model are overlapped and arranged in a box body, and the lens module can capture all the target patterns within the detection range through the detection holes. The advantages of the above structure are as follows:

[0014] 1. It solves the problem that when a close-up lens actually shoots at multiple object distances, the lens module needs to be moved multiple times, making the detection inconvenient.

[0015] 2. It solves the problem that when a close-up lens actually shoots at multiple object distances, a large space is required.

[0016] 3. It solves the problem that when a close-up lens actually shoots at multiple object distances, since a light source is required for each object distance, the difference between the light sources causes differences in test results.

[0017] 4. The integrated system realizes electronic control, with simple and precise operation.

[0018] 5. The software automatically analyzes images, detects multiple parameters of the lens (MTF, distortion, relative illuminance, illuminance uniformity, etc.), with good consistency, no individual differences of manual operation, high precision, and the results can be automatically archived. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described below with reference to the drawings and embodiments.

[0020] Figure 1 It is a schematic cross-sectional structure diagram when the lens module of the present utility model faces a detection hole.

[0021] Figure 2 It is a schematic cross-sectional structure diagram when the lens module of the present utility model faces another detection hole.

[0022] Figure 3 It is a schematic diagram of the overall structure of the present utility model.

[0023] Figure 4 It is a schematic diagram of the old test method. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The advantages, features, and implementation methods of the present disclosure will be clarified by the following implementation schemes described with reference to the drawings. However, the present disclosure can be embodied in different forms and should not be construed as limited to the implementation schemes set forth herein. On the contrary, these implementation schemes are provided so that the present disclosure will be comprehensive and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is only limited by the scope of the claims.

[0025] The shapes, sizes, ratios, angles, and numbers disclosed in the drawings used to describe the embodiments of the present disclosure are merely examples, and thus the present disclosure is not limited to the details shown. Throughout the specification, the same reference numerals refer to the same elements. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present disclosure, that detailed description will be omitted. When using "comprising", "having", and "including" described in this specification, other components may be added unless "only" is used. Unless stated to the contrary, terms in the singular form may include the plural form.

[0026] When interpreting an element, although not explicitly described, the element is understood to include a margin of error.

[0027] When describing a positional relationship, for example, when the positional relationship is described as "on", "above", "below", and "adjacent to", unless "immediately" or "directly" is used, one or more parts may be arranged between two other parts.

[0028] When describing a temporal relationship, for example, when the temporal order is described as "after", "subsequently", "next", and "before", unless "exactly" or "directly" is used, discontinuous cases may be included.

[0029] It should be understood that although terms such as "first" and "second" may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the present disclosure.

[0030] As can be fully understood by those skilled in the art, the features of different embodiments of the present disclosure may be partially or fully coupled or combined with each other, and may cooperate with each other in various ways and be technically driven. The embodiments of the present disclosure may be executed independently of each other, or may be executed together in a mutually dependent relationship.

[0031] Refer to Figures 1 to 3, the present utility model discloses a multi-object distance and multi-parameter automatic detection system for a lens, which includes a box body 1 and a plurality of transparent and overlapping targets 2 arranged inside the box body 1, and a light source for illuminating the targets 2. The box body 1 is arranged on a workbench. The box body 1 is square. One side of the box body 1 facing the linear motion system is provided with a detection hole 3. Target patterns are set on all the targets 2. All the target patterns on different targets 2 within the same detection range are arranged in a staggered manner. The detection hole 3 is directly opposite the center position of each target 2 in the target 2 group. The lens module 4 can capture all the target patterns within the detection range through the detection hole 3, and then analyze the target 2 patterns actually captured by the lens module 4 through software to determine the clarity of the patterns. The positions of all the target patterns within the detection range are staggered, so they will not block each other, and thus can all be captured by the lens module 4. The above structure solves the problem that the lens module 4 needs to be moved multiple times when the close-up lens actually shoots multiple object distances, improves the test efficiency, and solves the problem of test result differences caused by the differences between each light source because one light source is required for each object distance, greatly reduces the space occupied by the detection, and the integrated system automatic analysis software can simultaneously detect multiple parameters (MTF, distortion, relative illuminance, illuminance uniformity, etc.) of the lens module 4, has good consistency, no artificial individual differences, high precision, and greatly improves the accuracy of the detection. By adjusting the lens module 4 installation adjustment fixture, the target 2 installation fixture and the spacer column, the distances between the targets 2 at different object distances can be adjusted to improve compatibility.

[0032] As shown in the figure, there are two detection holes 3 in the present application, and there are four targets 2. The four targets 2 are divided into two target groups. The four targets 2 are arranged in an overlapping manner, but the centers of the targets 2 in each group are coaxially aligned. Through the design of the target patterns, the target patterns of the two targets 2 in the same vertical direction can be staggered during actual shooting imaging, so as to achieve the simultaneous detection of two different object distances in the same vertical direction. One detection hole 3 detects a corresponding target group. The lens module 4 only needs to be moved twice to detect four object distances. Because the target patterns are relatively dense and the detection range is small, the target patterns overlap due to the four-fold overlap, so it is necessary to divide them into two target groups for detection. Therefore, the lens module 4 of the application needs to drive the box body 1 to move through the linear motion system, so that different detection holes 3 can be directly opposite the lens module 4, so that the lens module 4 can be located directly below the targets 2 at different object distances. The box body 1 and the linear motion system are both arranged on the workbench. The box body 1 can move driven by the linear motion system. Of course, we can also drive the lens module 4 to move through the linear motion system to achieve the same effect.

[0033] As shown in the figure, the linear motion system includes a servo motor 5, a guide rail assembly 6 and a lead screw assembly 7. The box body 1 is connected to the guide rail assembly 6 and the lead screw assembly 7, and the servo motor 5 is connected to the lead screw assembly 7. The servo motor 5, the guide rail assembly 6 and the lead screw assembly 7 are all components of the prior art, so their specific structures will not be described in detail.

[0034] As shown in the figure, it further includes a lifting system. The lens module 4 is lifted by the lifting system, and the lifting system can accurately adjust the object distance. Of course, the structure of the lifting system is the same as that of the linear motion system, at least the moving directions are different, so it will not be described in detail. The lifting system can adjust the height of the lens module 4 to be measured, facilitating the switching and use of lens modules 4 of different specifications.

[0035] As shown in the figure, the light source 8 is a surface light source 8. The surface light source 8 includes a circuit board and LED chips soldered on the circuit board. The circuit board and the LED chips are both off-the-shelf products of conventional technology, so their specific structures will not be described in detail. A support boss 9 is provided on the inner wall of the box body 1. The circuit board is placed on the support boss 9 and pressed by a cover plate 10. The cover plate 10 is connected to the box body 1 by screws, which is convenient for installation and disassembly. Moreover, a stepped surface 11 is provided on the inner wall of the box body 1. The target 2 is positioned by the stepped surface 11 and fixed on the stepped surface 11 by glue applied to the edge of the target 2.

[0036] The above has introduced in detail a multi-object-distance and multi-parameter automatic detection system for lenses provided by an embodiment of the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An automatic detection system for multiple object distances and multiple parameters of a lens, characterized in that : It includes a box body, several transparent and position-overlapping targets arranged in the box body, and a light source for illuminating the targets. Target patterns are provided on all the targets. A detection hole is provided on the box body. All the target patterns within the same detection range on different targets are arranged in a staggered manner, and the lens module can capture all the target patterns within the detection range through the detection hole.

2. The multi-object distance and multi-parameter automatic detection system for a lens according to claim 1, wherein: There are two detection holes, and there are four targets. The four targets are divided into two target groups, and one detection hole detects a corresponding target group.

3. The multi-object distance and multi-parameter automatic detection system for a lens according to claim 2, wherein: It further includes a linear motion system, and the box body or the lens module can move driven by the linear motion system.

4. The multi-object distance and multi-parameter automatic detection system for a lens according to claim 3, wherein: The linear motion system includes a servo motor, a guide rail assembly, and a lead screw assembly. The box body is connected to the guide rail assembly and the lead screw assembly, and the servo motor is connected to the lead screw assembly.

5. A multi-object distance and multi-parameter automatic detection system for a lens according to claim 1, characterized in that: It further includes a lifting system, and the lens module is lifted and lowered by the lifting system.

6. The multi-object distance and multi-parameter automatic detection system for a lens according to claim 1, characterized in that: A stepped surface is provided on the inner wall of the box body, and the target is fixed on the stepped surface.

7. A multi-object distance and multi-parameter automatic detection system for a lens according to claim 1, characterized in that: The light source is a surface light source.

8. The multi-object distance and multi-parameter automatic detection system for a lens according to claim 7, characterized in that: The surface light source includes a circuit board and LED chips soldered on the circuit board. A support boss is provided on the inner wall of the box body, and the circuit board is placed on the support boss and pressed by a cover plate.

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