CN102901465A - Equipment and method for measuring slope error of optical lens - Google Patents
Equipment and method for measuring slope error of optical lens Download PDFInfo
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- CN102901465A CN102901465A CN2012104207825A CN201210420782A CN102901465A CN 102901465 A CN102901465 A CN 102901465A CN 2012104207825 A CN2012104207825 A CN 2012104207825A CN 201210420782 A CN201210420782 A CN 201210420782A CN 102901465 A CN102901465 A CN 102901465A
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Abstract
The invention discloses equipment for measuring slope error of an optical lens. The equipment comprises an image target, an image acquisition device and an image processor, wherein the image target is manufactured according to the type of a standard lens curved surface of a detected lens; an acquisition camera lens faces towards the curved surface of the detected lens for acquiring an image formed by the image target through the curved surface of the detected lens and transmitting the acquired image to the image processor; and the image processor is used for performing contrastive analysis on the image and an image target theoretical image, calculating offset of each image point of the image, converting the offset into displacement and obtaining the slope error of each image point according to the displacement. The invention also provides a method for measuring the slope error of the optical lens. By implementing the technical scheme provided by the invention, the equipment and the method have the beneficial effects of capability of obtaining the slope error by comparing the image formed by the image target through the detected lens with the image target theoretical image, easiness in implementation, low cost and capability of keeping good accuracy.
Description
Technical field
The invention belongs to the optical mirror slip detection field, can be used for detecting the slope error of normal mirror sheet and special type reflecting optics, the aberration that also can be used for transmission lens detects.
Background technology
In existing solar light-heat power-generation field, owing to relating to lens reflecting optically focused, the surface smoothness of reflecting optics there is certain requirement.When eyeglass face type was second-rate, the baneful influence such as the beam spot deformation that can occur reflecting, light intensity are inhomogeneous was the slope error of eyeglass and cause the main lens parameters of this impact.For the point on the eyeglass, slope error is made a comment or criticism under the normal condition of incidence, and the theory orientation of this point reflection light and the error of actual direction are angle value.For avoiding this situation to occur, usually all need eyeglass is carried out the detection of slope error.
Prior art detects the eyeglass slope error by dual mode.A kind of mode is for passing through apparatus measures.The reasonable instrument of existing measurement slope error is Hartmann's scanner, and its principle is laser emitting laser, by the angle of detection of reflected behind the lens reflecting, and draws the slope error of this point with point of theory contrast.The advantage of this instrument is that precision is high, shortcoming is price, the physical construction part precision prescribed except scanner is high, in the situation that different physical construction and the softwares of needing of curved surface all redesign, very complicated.
The another kind of method of measuring is that three-dimensional system of coordinate carries out dimensional measurement, and as choose 40*40 point at curved surface, then the position that draws each point is carried out corresponding how much and calculated, and can draw the deviation of each point reality.It is loaded down with trivial details that the method is measured, and the time is long, and be the slope in a zone owing to what draw, is not the slope of each point, can cause larger error.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of equipment and a kind of method of measuring the optical mirror slip slope error of measuring the optical mirror slip slope error.
A kind of equipment of measuring the optical mirror slip slope error is characterized in that, comprises
Picture target according to the standard lens curve type making that is detected eyeglass;
Image acquisition device gathers camera lens towards detected lens curve, is used for gathering the image that becomes by detected lens curve as target, and the image that gathers is sent to image processor;
Image processor, be used for image with do comparative analysis as the target theory image, calculate each picture point side-play amount of image, and side-play amount be converted to displacement, obtain the slope error of each picture point according to displacement.
Preferably, described picture target is the regular picture of tool or structure.
Preferably, described picture target is curve map, chromatic graph, point range figure.
Preferably, described image acquisition device is CCD, camera or camera.
A kind of method of measuring the optical mirror slip slope error is characterized in that, the image that will become by detected eyeglass as target with compare as the target theory image, obtain slope error.
Preferably, method comprises the steps:
Picture target according to the standard lens curve type making that is detected eyeglass;
Image acquisition device is set, the image that the image acquisition device collection is become by detected lens curve as target;
Image processor is set, makes image processor with image and do comparative analysis as the target theory image, calculate each picture point side-play amount of image, and side-play amount is converted to displacement, obtain the slope error of each picture point according to displacement.
Implement technical scheme of the present invention, have following beneficial effect: by the image that will become by detected eyeglass as target with compare as the target theory image, obtain slope error, realize simply, cost is low, and can keep good degree of accuracy.
Description of drawings
Fig. 1 is the structural representation that the present invention measures the equipment of optical mirror slip slope error;
Fig. 2 is the variation diagram of the picture point in the slope error situation about having or not;
Fig. 3 is the schematic diagram of picture target theory image;
Fig. 4 is at the schematic diagram that the image of picture target in the slope error situation is arranged;
Fig. 5 is the schematic diagram with target theory image after the curve refinement among Fig. 3;
Fig. 6 is the schematic diagram with the image of curve refinement after image target among Fig. 4;
Fig. 7 is for carrying out slope error among Fig. 6 the schematic diagram behind the mark;
Among the figure: 1, as target; 2, image acquisition device; 3, detected lens curve; 4, imaging surface.
Embodiment
The invention provides a kind of equipment and method of measuring the optical mirror slip slope error, below in conjunction with accompanying drawing technical scheme of the present invention is elaborated.
The equipment of measurement optical mirror slip slope error of the present invention comprises the picture target of making according to the standard lens curve type of detected eyeglass; Image acquisition device gathers camera lens towards detected lens curve, is used for gathering the image that becomes by detected lens curve as target, and the image that gathers is sent to image processor; Image processor, be used for image with do comparative analysis as the target theory image, calculate each picture point side-play amount of image, and side-play amount be converted to displacement, obtain the slope error of each picture point according to displacement.Described picture target is the regular picture of tool or structure, for example curve map, chromatic graph, point range figure.Described image acquisition device is CCD, camera or camera.
The method of measurement optical mirror slip slope error of the present invention is: the image that will become by detected eyeglass as target with compare as the target theory image, obtain slope error.Concrete steps are as follows: according to the picture target of the standard lens curve type making that is detected eyeglass; Image acquisition device is set, the image that the image acquisition device collection is become by detected lens curve as target; Image processor is set, makes image processor with image and do comparative analysis as the target theory image, calculate each picture point side-play amount of image, and side-play amount is converted to displacement, obtain the slope error of each picture point according to displacement.
The present embodiment is to describe as the situation of target 1 as rectilinear, Fig. 1 is the structural representation that the present invention measures the equipment of optical mirror slip slope error, as shown in the figure, equipment comprises picture target 1, detected lens curve 3, image acquisition device 2, gathers camera lens towards detected lens curve 3.
For the ease of the processing of analysis and software, the theoretical image that expectation can collect is regular figure, here in order to see the straight line that is evenly distributed, and the picture target 1 of accordingly design correspondence.The design of picture target 1 can be according to the trace principle of light, in the situation that observation station and imaging all determine, oppositely trace goes out the curve distribution of picture target 1 position, makes as target 1.This process can be appended software with light and be realized, also can calculate by surface equation and reflection law design software.
Because the design comparison of picture target 1 is simple, assert that directly theory is imaged as the rectilinear that is evenly distributed, as shown in Figure 3.The curve of this picture is vertically arranged perpendicular to paper on Fig. 2.
The picture of ordering take A is as example, and ideally when the O point was seen the picture A ' that A orders, sight line was by B point on the detected lens curve 3.When if there is not slope error in each point, the picture of seeing should be theoretical image, as shown in Figure 3.
When the B point and around when having anticlockwise slope error, the reflection ray of light AB no longer passes through the O point, and can pass through O ' point, and image acquisition to the A picture point on imaging surface 4 of ordering become A ", intersect at the B ' point of curve.Be that the picture that A is ordered than theoretical position displacement has occured, displacement is A ' A ".If the each point slope error is different, the displacement of reaction also is not quite similar, and namely can cause the image observed as shown in Figure 4.
After collecting image, image processor is processed image, with image with do comparative analysis as target 1 theoretical image, calculate each picture point side-play amount of image, and side-play amount be converted to displacement, obtain the slope error of each picture point according to displacement.
In the present embodiment, image is processed with software, adopted Matlab to process in the example, processing procedure is as follows:
1, because the common more complicated of color of image at first will be carried out color treatments, only comprised the pure color figure of two kinds of color types:
Suppose that image is comprised of a*b pixel, each pixel is made of the RGB three primary colors, can use software directly to extract the rgb value of each pixel, namely obtains 3 of an a*b*3 and ties up matrixes.The judgement statement is set, the RGB that makes this matrix each point during greater than certain value this point be 1, otherwise be 0, obtain thus two dimension 01 matrix of an a*b.The pure color figure (namely only having two colors) that forms the correspondence that 3 dimension matrixes obtain with 3 identical two-dimensional matrixs
2, because every curve has certain width, next carry out thinning processing, the curve of certain width become the curve that transversely only has a pixel:
Directly the a*b matrix of two dimension is processed, common 0 expression black adopt to be judged statement to each line scanning of advancing, and begins numeration when the value of scanning is 0, until next number be 1 o'clock only, getting this interval intermediate value is 0, other values are 1.Repeat down like this, obtain new two-dimensional matrix.Profit uses the same method and carries out the figure demonstration, can obtain the image of Fig. 5 and Fig. 6.
3, the demonstration of slope error and calculating:
For easy, next carry out computing with the 2nd curve, horizontal operating range begins to finish to the intermediate value of the 2nd curve and the 3rd curve for the 1st curve and the 2nd the curve intermediate value by Fig. 5, and usually in the situation that slope error is little, the 2nd curve can not deflect away from this scope.The two-dimensional matrix of Fig. 6 and Fig. 5 is poor, and-1 value of this matrix is set to 0, obtaining new two-dimensional matrix, the point of the corresponding figure of its two-dimensional matrix is the deviation that exists slope error to cause image.Image takes over and represents to have anticlockwise slope error, otherwise represents that then slope error is clockwise direction, and it is far away to depart from standard lines, and slope error is larger.According to fixing step-length, draw corresponding arrow from the point of center alignment theory, the direction of the slope error of the direction indication of arrow then, the size of arrow has represented the slope error size.
In order to embody more intuitively the size of slope error, need calculate accordingly, computing method are as follows: can prove in the situation that misalignment angle is very little, the slope error angle value is approximately equal to ∠ A ' OA "; can extrapolate deviation A ' A according to the position of image and size " with the relation of pixel, can release thus slope error corresponding to pixel, namely draw the size of each point slope error.
Can calculate slope error corresponding to curve map by said method, and draw the direction of slope error.Can draw according to the variation tendency of slope error the size of inclined-plane error.
Above method that provides a kind of software to realize uses the method to be merely able to draw the slope error of a direction, and the slope error of corresponding vertical direction need to draw with the curve of vertical direction.
Above this computing method, the software correspondence is the simplest, if the curve of same use grid type can once draw the slope error of all directions, but software is processed more complicated.Simultaneously also can adopt color diagram or point range figure to carry out same measurement, corresponding change gets final product when matrix disposal.
The above; only be the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (6)
1. an equipment of measuring the optical mirror slip slope error is characterized in that, comprises
Picture target (1) according to the standard lens curve type making that is detected eyeglass;
Image acquisition device (2) gathers camera lens towards detected lens curve (3), is used for gathering the image that becomes by detected lens curve (3) as target (1), and the image that gathers is sent to image processor;
Image processor, be used for image with do comparative analysis as the target theory image, calculate each picture point side-play amount of image, and side-play amount be converted to displacement, obtain the slope error of each picture point according to displacement.
2. the equipment of measurement optical mirror slip slope error according to claim 1 is characterized in that, described picture target (1) is the regular picture of tool or structure.
3. the equipment of measurement optical mirror slip slope error according to claim 2 is characterized in that, described picture target (1) is curve map, chromatic graph, point range figure.
4. the equipment of measurement optical mirror slip slope error according to claim 1 is characterized in that, described image acquisition device (2) is CCD, camera or camera.
5. a method of measuring the optical mirror slip slope error is characterized in that, the image that will become by detected eyeglass as target (1) with compare as the target theory image, obtain slope error.
6. want the method for 5 described measurement optical mirror slip slope error according to right, it is characterized in that, comprise the steps:
Picture target (1) according to the standard lens curve type making that is detected eyeglass;
Image acquisition device (2) is set, the image that image acquisition device (2) collection is become by detected lens curve (3) as target (1);
Image processor is set, makes image processor with image and do comparative analysis as the target theory image, calculate each picture point side-play amount of image, and side-play amount is converted to displacement, obtain the slope error of each picture point according to displacement.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758024A (en) * | 2016-03-18 | 2016-07-13 | 东方宏海新能源科技发展有限公司 | Disc-type tracking system focusing method |
| CN106644394A (en) * | 2016-11-17 | 2017-05-10 | 天津滨海光热反射技术有限公司 | Silver mirror on-line detection device and detection method |
| CN106768891A (en) * | 2016-12-28 | 2017-05-31 | 大连鉴影光学科技有限公司 | A kind of special equipment based on reflected image method detection object surface normal error |
| CN110543032A (en) * | 2015-08-05 | 2019-12-06 | 依视路国际公司 | method for determining a parameter of an optical device |
| CN113985420A (en) * | 2021-12-28 | 2022-01-28 | 四川吉埃智能科技有限公司 | Method for compensating scanning light path error of laser radar inclined by 45 degrees |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945204A (en) * | 2006-10-19 | 2007-04-11 | 上海大学 | Three dimension outline measuring device and method for mirror article surface |
| CN101813461A (en) * | 2010-04-07 | 2010-08-25 | 河北工业大学 | Absolute phase measurement method based on composite color fringe projection |
| US20110075887A1 (en) * | 2009-09-29 | 2011-03-31 | Renesas Electronics Corporation | Lens shift measuring apparatus, lens shift measuring method, and optical module manufacturing method |
| CN102183214A (en) * | 2011-03-03 | 2011-09-14 | 中国科学院光电技术研究所 | Method for optically detecting large-aperture aspherical mirror structure |
| CN102507446A (en) * | 2011-10-24 | 2012-06-20 | 北京航空航天大学 | Detection method for optical angle deviation of light-transmitting glass |
| CN202305179U (en) * | 2011-11-01 | 2012-07-04 | 北京航空航天大学 | Light-transmitting glass optical distortion digital detector |
| CN202885790U (en) * | 2012-10-29 | 2013-04-17 | 大连宏海新能源发展有限公司 | Device for measuring optical lens slope error |
-
2012
- 2012-10-29 CN CN2012104207825A patent/CN102901465A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945204A (en) * | 2006-10-19 | 2007-04-11 | 上海大学 | Three dimension outline measuring device and method for mirror article surface |
| US20110075887A1 (en) * | 2009-09-29 | 2011-03-31 | Renesas Electronics Corporation | Lens shift measuring apparatus, lens shift measuring method, and optical module manufacturing method |
| CN101813461A (en) * | 2010-04-07 | 2010-08-25 | 河北工业大学 | Absolute phase measurement method based on composite color fringe projection |
| CN102183214A (en) * | 2011-03-03 | 2011-09-14 | 中国科学院光电技术研究所 | Method for optically detecting large-aperture aspherical mirror structure |
| CN102507446A (en) * | 2011-10-24 | 2012-06-20 | 北京航空航天大学 | Detection method for optical angle deviation of light-transmitting glass |
| CN202305179U (en) * | 2011-11-01 | 2012-07-04 | 北京航空航天大学 | Light-transmitting glass optical distortion digital detector |
| CN202885790U (en) * | 2012-10-29 | 2013-04-17 | 大连宏海新能源发展有限公司 | Device for measuring optical lens slope error |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110543032A (en) * | 2015-08-05 | 2019-12-06 | 依视路国际公司 | method for determining a parameter of an optical device |
| CN110543032B (en) * | 2015-08-05 | 2021-05-04 | 依视路国际公司 | Method for determining a parameter of an optical device |
| CN105758024A (en) * | 2016-03-18 | 2016-07-13 | 东方宏海新能源科技发展有限公司 | Disc-type tracking system focusing method |
| CN106644394A (en) * | 2016-11-17 | 2017-05-10 | 天津滨海光热反射技术有限公司 | Silver mirror on-line detection device and detection method |
| CN106768891A (en) * | 2016-12-28 | 2017-05-31 | 大连鉴影光学科技有限公司 | A kind of special equipment based on reflected image method detection object surface normal error |
| CN113985420A (en) * | 2021-12-28 | 2022-01-28 | 四川吉埃智能科技有限公司 | Method for compensating scanning light path error of laser radar inclined by 45 degrees |
| CN113985420B (en) * | 2021-12-28 | 2022-05-03 | 四川吉埃智能科技有限公司 | Method for compensating scanning light path error of laser radar inclined by 45 degrees |
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Application publication date: 20130130 |