CN210323759U

CN210323759U - A fixed mark target structure for out of focus test system

Info

Publication number: CN210323759U
Application number: CN201921075454.XU
Authority: CN
Inventors: 陈中菲; 何明林
Original assignee: International Optical And Electric Co ltd
Current assignee: International Optical And Electric Co ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-04-14
Anticipated expiration: 2029-07-10

Abstract

The utility model discloses a fixed mark target structure for out of focus test system, including shell and 7 mark targets, the shell is hollow structure, and inside 7 mark targets are parallel to each other and are fixed in the shell, just interval between 7 mark targets equals. The utility model discloses in, make 7 mark targets rigidity in the shell through the aforesaid setting, and the interval between 7 mark targets is fixed, then will be fixed mark target structure cooperation and be fit for the collimator of focus, then with the product that awaits measuring 7 mark targets the out-of-focus volume of beating the product that awaits measuring of testing in fact, thereby the out-of-focus volume according to the 7 test points that reachs comes the performance of the battery of lens that the analysis awaited measuring can, thereby realize testing the performance of the product that awaits measuring, high accuracy electric displacement platform has been saved, greatly reduced manufacturing cost, and small, easily extensively promote.

Description

A fixed mark target structure for out of focus test system

Technical Field

The utility model belongs to the technical field of out of focus test system, in particular to a fixed mark target structure for out of focus test system.

Background

In recent years, with the development of electronic technology, electronic products such as cameras and video cameras have become more and more essential devices for people to work and live. The lens group is an important optical component in the whole photographic or video-recording system, and the quality of the lens group directly determines the quality of the image.

In the field of manufacturing fixed-focus or variable-focus cameras, a lens group needs to be focused and detected before products are delivered, so that unqualified lens groups are picked out, and the quality of delivered products is guaranteed. And the apparatus for detecting the lens group is called an out-of-focus test system.

The collimator is mainly used for producing parallel light beams, is an important tool for assembling and adjusting the optical instrument, and is also an important component in an optical measuring instrument. The collimator is widely applied to the performance test and evaluation process of the lens combination camera, and the product needs to be measured through the target.

But current out of focus test system bears one set of test target through the electronic displacement platform of high accuracy, moves along with the back and forth scanning of target and measures, but the shortcoming of this kind of mode is bulky, is unfavorable for the measurement of a plurality of products moreover, and use cost is high.

In the utility model application with patent application number CN201410143038.4, an optical axis runout testing system is disclosed, comprising: the system comprises a parabolic reflector, a plane reflector, a target source, a grating ruler, a linear guide rail, a sliding table, a displacement control mechanism and an image acquisition and processing mechanism; the sliding table can move on the linear guide rail; the displacement control mechanism controls the movement of the sliding table; the target source is fixed on the sliding table; the grating ruler is used for measuring the defocusing displacement of the target source along the guide rail on the main optical axis, and further calculating the simulated target distance; the target source provides an aiming target for the tested photoelectric instrument working in each spectrum section during the optical axis runout test; the optical signal is reflected by the target source through the plane reflector and then reflected by the parabolic reflector to the photoelectric instrument to be tested to form a test light path; and calculating the variation of the front and rear focusing optical axes when the measured photoelectric instrument observes the far and near targets according to the difference of signals acquired by the image acquisition and processing mechanism when the target source is at different positions.

However, the optical axis run-out testing system disclosed above needs to control the movement of the sliding table through the displacement control mechanism, so as to measure the defocus amount of the target source on the sliding table along the guide rail on the main optical axis, and further calculate the simulated target distance.

Disclosure of Invention

In order to solve the problem, an object of the utility model is to provide a fixed mark target structure for out of focus test system, through the position of fixed 7 mark targets, just can realize testing the performance of the product that awaits measuring, saved the electronic displacement platform of high accuracy, greatly reduced manufacturing cost, small moreover, easily extensive popularization.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a fixed mark target structure for out of focus test system, including shell and 7 mark targets, the shell is hollow structure, and inside 7 mark targets are parallel to each other and are fixed in the shell, just interval between 7 mark targets equals. The utility model discloses in, make 7 mark targets rigidity in the shell through the aforesaid setting, and the interval between 7 mark targets is fixed, then will be fixed mark target structure cooperation and be fit for the collimator of focus, then with the product that awaits measuring 7 mark targets the out-of-focus volume of beating the product that awaits measuring of testing in fact, thereby the out-of-focus volume according to the 7 test points that reachs comes the performance of the battery of lens that the analysis awaited measuring can, thereby realize testing the performance of the product that awaits measuring, high accuracy electric displacement platform has been saved, greatly reduced manufacturing cost, and small, easily extensively promote.

Further, the 7 targets are 5mm apart from each other. The utility model discloses in, the best test effect can be realized to 7 mark 5 mm's interval settings between the target.

Furthermore, patterns with the same shape are arranged in the 7 targets. The utility model discloses in, the figure of 7 mark targets the inside can be changed, during the test, gets the picture through the product that awaits measuring 7 mark targets and focuses and read data to whether the out of focus volume according to the 7 test points that reachs comes the performance of the battery of lens that the analysis awaited measuring can, thereby realize testing the performance of the product that awaits measuring, saved the electronic displacement platform of high accuracy, greatly reduced manufacturing cost, small moreover, easily extensive popularization.

Further, the pattern inside each target is not at the same location on the target. Through the arrangement, the fixed target structure can be matched with the collimator to realize a better test effect.

Further, the shell is a hollow cylindrical structure with openings at two ends. The utility model discloses in, through the aforesaid setting, make this fixed mark target structure can cooperate the collimator to realize better test effect.

Furthermore, the 7 targets are all round plate-shaped structures, and the 7 targets are equal in size. The utility model discloses in, through the aforesaid setting, make this fixed mark target structure can cooperate the collimator to realize better test effect.

Furthermore, 7 targets are fixed inside the shell in a row, the distance between the leftmost target and the opening at the left end of the shell is 5mm, and the right end face of the rightmost target and the opening at the right end of the shell are on the same plane. The utility model discloses in, through the aforesaid setting, make this fixed mark target structure can cooperate the collimator to realize better test effect.

Further, the thickness of each of the 7 targets was 2 to 3 mm. The utility model discloses in, through the aforesaid setting, make this fixed mark target structure can cooperate the collimator to realize better test effect.

The beneficial effects of the utility model reside in that: compared with the prior art, the utility model discloses in, make 7 mark targets rigidity in the shell through the aforesaid setting, and the interval between 7 mark targets is fixed, then will should fix the collimator that mark target structure cooperation is fit for the focus, then carry out the real defocus amount that tests the product that awaits measuring of clapping 7 mark targets with the product that awaits measuring, thereby whether the performance of the battery of lens that the analysis awaited measuring can according to the defocus amount of the 7 test points that reachs, thereby realize testing the performance of the product that awaits measuring, high accuracy electric displacement platform has been saved, greatly reduced manufacturing cost, and small, easily extensively promote.

Drawings

Fig. 1 is a schematic structural diagram of 7 targets of a fixed target structure for a defocus test system according to the present invention.

Fig. 2 is an internal structure diagram of a fixed target structure for a defocus testing system of the present invention.

Fig. 3 is a schematic structural diagram of a fixed target structure for a defocus testing system of the present invention.

Fig. 4 is a schematic diagram of a first pattern captured by a fixed target structure for a defocus test system according to the present invention.

Fig. 5 is a schematic diagram of a second pattern captured by a fixed target structure for a defocus test system according to the present invention.

Fig. 6 is a graph formed from data calculated from a pattern captured for a fixed target structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-3, the utility model provides a fixed mark target structure for out of focus test system, including shell 1 and 7 mark target 2, shell 1 is hollow structure, and it is inside that 7 are parallel to each other to be fixed in shell 1 between the mark target 2, and the interval between 7 mark targets 2 equals. The utility model discloses in, make 7 mark targets 2 fixed in the position of shell 1 through the aforesaid setting, and 7 interval between the mark target 2 are fixed, then will be fixed mark 2 structure cooperation and be fit for the collimator of focus, then with the product that awaits measuring 7 mark targets 2 and carry out real the defocusing volume of clapping the product that tests the awaiting measuring to 7 mark targets 2, thereby whether the defocusing volume according to the 7 test points that reachs comes the performance of the battery of lens that the analysis awaited measuring can, thereby realize testing the performance of the product that awaits measuring, high accuracy electric displacement platform has been saved, greatly reduced manufacturing cost, and small, easily extensively promote.

In the present embodiment, the 7 targets 2 are each 5mm apart from each other. The utility model discloses in, the best test effect can be realized to 7 mark 5 mm's between 2 interval settings of mark.

In the present embodiment, the 7 targets 2 are provided with the same shape of the pattern 3. The utility model discloses in, the figure 3 of 7 mark target 2 the inside can be changed, during the test, get the picture through the product that awaits measuring 7 mark target 2 and focus and read data to whether the out of focus volume of 7 test points according to reacing comes the performance of the battery of lens that the analysis awaited measuring can, thereby realize testing the performance of the product that awaits measuring, saved the electronic displacement platform of high accuracy, greatly reduced manufacturing cost, moreover small, easily extensive popularization.

In the present embodiment, the positions of the patterns 3 inside each target 2 on the target 2 are not uniform. Through the arrangement, the fixed target 2 structure can be matched with the collimator to realize a better test effect.

The fixed target structure adopts different patterns and is matched with a collimator with a proper focal length, then a product to be detected is used for shooting the fixed target structure, and the pictures respectively obtained are pictures shown in 4-5;

referring to the pictures shown in fig. 4-5, each picture includes several sub-pictures, each sub-picture can obtain a corresponding numerical value in combination with a corresponding algorithm, and a similar graph as shown in fig. 6 can be obtained according to several groups of obtained data, where the above algorithms are prior art. And the actual in-focus position can be judged according to the curve graph, and the defocusing amount of the test point position is obtained by comparing the actual in-focus position with the theoretical in-focus position.

In the present embodiment, the housing 1 is a hollow cylindrical structure having openings at both ends. The utility model discloses in, through the aforesaid setting, make this fixed mark 2 structures can cooperate the collimator to realize better test effect.

In this embodiment, the 7 targets 2 are all circular plate-shaped structures, and the 7 targets 2 are all equal in size. The utility model discloses in, through the aforesaid setting, make this fixed mark 2 structures can cooperate the collimator to realize better test effect.

In this embodiment, 7 targets 2 are fixed inside the housing 1 in a row, the distance between the leftmost target 2 and the opening at the left end of the housing 1 is 5mm, and the right end face of the rightmost target 2 and the opening at the right end of the housing 1 are on the same plane. The utility model discloses in, through the aforesaid setting, make this fixed mark 2 structures can cooperate the collimator to realize better test effect.

In this embodiment, the 7 targets 2 are each 2-3mm thick. The utility model discloses in, through the aforesaid setting, make this fixed mark 2 structures can cooperate the collimator to realize better test effect.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A fixed target structure for a defocusing test system is characterized by comprising a shell and 7 targets, wherein the shell is of a hollow structure, the 7 targets are fixed in the shell in parallel, and the 7 targets are equal in distance; patterns with the same shape are arranged in the 7 targets; the patterns within each target are all at different positions on the target.

2. The fixed target structure for through focus test system of claim 1, wherein the 7 targets are each 5mm apart.

3. The fixed target structure for through focus test systems of claim 1, wherein the housing is a hollow cylindrical structure with openings at both ends.

4. The fixed target structure for through focus test system of claim 3, wherein the 7 targets are all circular plate-like structures, and the 7 targets are all equal in size.

5. The fixed target structure for the defocus test system of claim 4, wherein 7 targets are fixed in a row inside the housing, the distance between the leftmost target and the opening at the left end of the housing is 5mm, and the right end face of the rightmost target and the opening at the right end of the housing are on the same plane.

6. The fixed target structure for through focus test system of claim 1, wherein the thickness of 7 targets is 2-3mm each.