CN203310773U - Surface defect detection device for spherical optical part - Google Patents
Surface defect detection device for spherical optical part Download PDFInfo
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- CN203310773U CN203310773U CN2013203506868U CN201320350686U CN203310773U CN 203310773 U CN203310773 U CN 203310773U CN 2013203506868 U CN2013203506868 U CN 2013203506868U CN 201320350686 U CN201320350686 U CN 201320350686U CN 203310773 U CN203310773 U CN 203310773U
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- turntable
- length adjustable
- adjustable mechanism
- guide rail
- defect detection
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Abstract
The utility model relates to a surface defect detection device for a spherical optical part, and belongs to the technical field of a surface defect detection technology of the optical part. The surface defect detection device comprises a spindle, a rotary table, a length adjustable mechanism, a guide rail and an image capturing device, wherein the rotary table and the image capturing device are mounted on the guide rail; the spindle is located above the rotary table; the spindle is mounted on one end of the length adjustable mechanism; the other end of the length adjustable mechanism is used for mounting a spherical optical part to be detected; the image capturing device can move on the guide rail; the rotary shafts of the spindle and the rotary table are different. According to the surface defect detection device provided by the utility model, the rotary table and the spindle which rotate around the different rotary shafts respectively are designed so that the space position of the surface to be detected can be accurately obtained, a scanning process is simplified and the scanning link control difficulty caused by three-dimensional scanning measurement is effectively reduced.
Description
Technical field
The utility model relates to optical element beauty defects detection technique field, is specifically related to a kind of spherical optics part beauty defects pick-up unit.
Background technology
The detection of optical element beauty defects index always relies on the reviewer to carry out visual detection.Though have corresponding technical standard to carry out standard, provide according to testing result the experience that opinion rating often is fixed against the reviewer.Therefore, the detection of this index is that optics is manufactured and in all technical, to be consumed manpower most and most probable is controversial.Based on existing machine vision technique and automatic control technology, develop corresponding optical element beauty defects detecting instrument, be the direction that the optical detection professional person makes great efforts.
The beauty defects size of optical element is minimum, is micron level.If differentiate the object of micron dimension, need to adopt the microscope of high power, the imaging region of high-power microscope is generally several millimeters.And general optical element bore is generally 5～80mm, while measuring the larger caliber part, need to take the detection mode of sub-aperture scanning splicing.
Domestic beauty defects for the plane optical element detects has developed pertinent instruments, the Overlap-scanning method all adopts the X-Y two-dimensional scan connecting method that is easy to realize, but because the microlens imaging region is little, scanning process needs higher control accuracy, can bring difficulty for the detecting instrument of engineering for research and development.The Overlap-scanning detection mode of spherical optics part need to be become by the two-dimensional approach of detection plane three-dimensional three dimensional constitution, and its research and development difficulty of bringing for the scanning process automatic control link promotes greatly.Therefore, how to design the spherical optics part beauty defects Overlap-scanning pick-up unit of being convenient to realize and become technical matters urgently to be resolved hurrily.
The utility model content
The technical matters that (one) will solve
The technical problems to be solved in the utility model is: how to design the spherical optics part beauty defects pick-up unit that a kind of accuracy of detection is high, simplify testing process and difficulty.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of spherical optics part beauty defects pick-up unit, comprise rotating shaft, turntable, length adjustable mechanism, guide rail and image collecting device, described turntable and image collecting device are arranged on guide rail, described rotating shaft is positioned at the turntable top, and described rotating shaft is installed on an end of described length adjustable mechanism, the other end of described length adjustable mechanism is for installing spherical optics part to be measured, described image collecting device can move on guide rail, the turning axle of described rotating shaft and turntable is different.
Preferably, described length adjustable mechanism is telescopic bar.
Preferably, described image collector is set to videomicroscopy.
Preferably, described pick-up unit also comprises the motor be connected with described turntable.
(3) beneficial effect
The utility model respectively around turntable and the rotating shaft of different axle rotations, can accurately obtain the locus on surface to be measured by design, has simplified scanning process, effectively reduces the scanning link of bringing because of three-dimensional scanning measurement and controls difficulty.
The accompanying drawing explanation
Fig. 1 is the structural representation of pick-up unit of the present utility model;
Fig. 2 is for determining the geometric relationship schematic diagram of the parallel circle number scanned;
Fig. 3 a is the schematic three dimensional views of scanning motion track, and Fig. 3 b is the X-Y perspective view of scanning motion track, and Fig. 3 c is the Y-Z perspective view of scanning motion track.
Embodiment
For making the purpose of this utility model, content and advantage clearer, below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.
As shown in Figure 1, the utility model provides a kind of spherical optics part beauty defects pick-up unit, comprise rotating shaft 1, turntable 2, length adjustable mechanism 3, guide rail 4 and image collecting device 5, described turntable 2 and image collecting device 5 are arranged on guide rail 4, described rotating shaft 1 is positioned at turntable 2 tops, and described rotating shaft 1 is installed on an end of described length adjustable mechanism 3, the other end of described length adjustable mechanism 3 is installed spherical optics part 6 to be measured for the mode clamped by three-jaw, and described image collecting device 5 can move on guide rail 4.Described length adjustable mechanism 3 can be telescopic bar.Described image collecting device 5 is videomicroscopy.
Described rotating shaft 1 is different with the turning axle of turntable 2, rotating shaft 1 is around the direction rotation shown in Fig. 1 shaft 1 left side arrow, namely, make spherical optics part 6 to be measured around the rotationally symmetric axis of spherical optics part 6 to be measured, rotate on the direction perpendicular to surface level, during because of the measurement part, the parallel position sweep velocitys different at spherical parts change to some extent, and this rotating shaft 1 need have stepless shift function.Turntable 2 rotation of the direction of arrow shown in 1 top around the shaft, make image collecting device 5 carry out in the horizontal direction the predetermined angle adjustment, and this turntable 2 can be motorized motions, also can be manual adjustment.The function of length adjustable mechanism 3 is to make the sphere vertex position of spherical optics part 6 to be measured and the distance of turntable 2 be spherical radius R (as shown in Figure 1 and Figure 2).The function of guide rail 4 is after 3 pairs of spherical optics parts 6 to be measured of length adjustable mechanism are adjusted, the distance of adjusting between image collecting device 5 and spherical optics part sphere to be measured summit is the focal distance f of image collecting device 5, and this adjustment process is common optical microscope measuring focus process.
The method adopts the normal detection mode to spherical optics part, makes the distance of the sphere summit of part to be measured and image collecting device be fixed as the focal distance f of image collecting device, and image collecting device gathers the spherical face image with fixing visual field all the time.So, adopt the mode of two rotating shafts, namely can accurately obtain the locus on surface to be measured, simplified scanning process, effectively reduce because the 3D scanning survey brings the scanning link and control difficulty.
The scanning theory of this sweeping scheme is as follows:
If the visual field of image collecting device is long is a, wide is b.Consider that the Overlap-scanning process need has image certain overlapping, should there be the multiplying power of dwindling the visual field gathered mutually, is made as m.The available fields size of single collection position is am * bm.
As shown in Figure 2, according to geometric relationship, determine the number N that needs scanning parallel circle, and the position of definite parallel circle.
The diameter D of each parallel circle
nCan obtain according to following formula (3), according to the visual field parameter b, can obtain needing the number n gathered on each parallel circle thus
n, as formula (4).
Dn＝2Rsin(nθ+θ/2) (3)
Here, n=1,2,3 ... N.
Expression rounds up.
Fig. 3 a～Fig. 3 c is as above formula of basis, and D=10mm (is D to spherical radius R=10mm bore
nMaximal value) the analogous diagram of piece surface image capture position field of view center position, in figure, long measure is mm.After determining the field of view center position, can, according to the geometric relationship of determining, calculate that each pixel gathers volume coordinate corresponding to image, realizes the Overlap-scanning of spherical face with this.
Based on above scanning theory, utilize the utility model to carry out the step of spherical optics part beauty defects detection as follows:
1), part 6 to be measured is installed on pick-up unit;
2), adjust turntable 2, be image collecting device 5 with the rotationally symmetric axis of spherical optics part 6 to be measured on same straight line;
3), according to the spherical radius R value of spherical optics part 6 to be measured, adjust length adjustable mechanism 3, the sphere vertex position that makes spherical optics part 6 to be measured and turntable 2 apart from being spherical radius R value;
4) distance of, adjusting between image collecting device 5 and spherical optics part to be measured 6 sphere summits is the focal distance f of image collecting device 5;
5), according to spherical radius R and two parameters of bore D of spherical optics part 6 to be measured, utilize above-mentioned formula (1)～(4) to calculate rotating shaft 1 and the kinematic parameter of turntable 2 in scanning process: the number N of parallel circle, and need the number N gathered on each parallel circle
n
6), according to the N calculated, the rotary course of turntable 2 is carried out to calibration, according to the result of calibration, adjusting turntable 2 needs on the parallel position of measuring to spherical optics part 6 to be measured, then according to aperture time t and the N of videomicroscopy
nThe rotational speed ω rotating shaft 1 of the rotating shaft 1 calculated, thereby start scanning, until then the complete scanning that stops a parallel circle of the image acquisition on this parallel circle scan the parallel circle of next calibration, until all parallel circle been scanned; Wherein, ω≤2 π/T, T=tN
n.
7), by after the image acquisition on all parallel circles to be measured, carry out the scan image splicing, obtain the optical microscopic image on whole surface to be measured;
8), according to the evaluation criterion (being GB) of beauty defects, obtain the beauty defects grade on surface to be measured.
The step of above-mentioned calculating and Overlap-scanning can be carried out by computing machine, and this computing machine can be connected by data line with videomicroscopy.
As can be seen from the above embodiments, turntable and rotating shaft that the utility model rotates around different axles respectively by design, can accurately obtain the locus on surface to be measured, simplify scanning process, effectively reduce the scanning link of bringing because of three-dimensional scanning measurement and control difficulty.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and distortion, these improvement and distortion also should be considered as protection domain of the present utility model.
Claims (4)
1. spherical optics part beauty defects pick-up unit, it is characterized in that, comprise rotating shaft (1), turntable (2), length adjustable mechanism (3), guide rail (4) and image collecting device (5), described turntable (2) and image collecting device (5) are arranged on guide rail (4), described rotating shaft (1) is positioned at turntable (2) top, and described rotating shaft (1) is installed on an end of described length adjustable mechanism (3), the other end of described length adjustable mechanism (3) is for installing spherical optics part to be measured, described image collecting device (5) can be upper mobile at guide rail (4), described rotating shaft (1) is different with the turning axle of turntable (2).
2. spherical optics part beauty defects pick-up unit as claimed in claim 1, is characterized in that, described length adjustable mechanism (3) is telescopic bar.
3. spherical optics part beauty defects pick-up unit as claimed in claim 1, is characterized in that, described image collecting device (5) is videomicroscopy.
4. as claim 1 or 2 or 3 described spherical optics part beauty defects pick-up units, it is characterized in that, described pick-up unit also comprises the motor be connected with described turntable (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203506868U CN203310773U (en) | 2013-06-19 | 2013-06-19 | Surface defect detection device for spherical optical part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203506868U CN203310773U (en) | 2013-06-19 | 2013-06-19 | Surface defect detection device for spherical optical part |
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| Publication Number | Publication Date |
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| CN203310773U true CN203310773U (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203506868U Expired - Lifetime CN203310773U (en) | 2013-06-19 | 2013-06-19 | Surface defect detection device for spherical optical part |
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| CN (1) | CN203310773U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543830A (en) * | 2016-06-23 | 2018-01-05 | 中国科学院长春光学精密机械与物理研究所 | The detection means and its detection method of spherical optics element surface defect |
| WO2020073347A1 (en) * | 2018-10-11 | 2020-04-16 | 广州博冠光电科技股份有限公司 | Surface defect detection apparatus and method for spherical optical element |
| CN114113123A (en) * | 2021-12-29 | 2022-03-01 | 泸州成像通科技有限公司 | Detection device for mobile phone camera module |
-
2013
- 2013-06-19 CN CN2013203506868U patent/CN203310773U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543830A (en) * | 2016-06-23 | 2018-01-05 | 中国科学院长春光学精密机械与物理研究所 | The detection means and its detection method of spherical optics element surface defect |
| CN107543830B (en) * | 2016-06-23 | 2022-02-22 | 中国科学院长春光学精密机械与物理研究所 | Detection device and detection method for surface defects of spherical optical element |
| WO2020073347A1 (en) * | 2018-10-11 | 2020-04-16 | 广州博冠光电科技股份有限公司 | Surface defect detection apparatus and method for spherical optical element |
| CN114113123A (en) * | 2021-12-29 | 2022-03-01 | 泸州成像通科技有限公司 | Detection device for mobile phone camera module |
| CN114113123B (en) * | 2021-12-29 | 2023-12-08 | 泸州成像通科技有限公司 | Detection device for mobile phone camera module |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |
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| CX01 | Expiry of patent term |