CN104935919A - Optical path monitoring method based on optical field camera - Google Patents
Optical path monitoring method based on optical field camera Download PDFInfo
- Publication number
- CN104935919A CN104935919A CN201510323214.7A CN201510323214A CN104935919A CN 104935919 A CN104935919 A CN 104935919A CN 201510323214 A CN201510323214 A CN 201510323214A CN 104935919 A CN104935919 A CN 104935919A
- Authority
- CN
- China
- Prior art keywords
- light
- field camera
- speculum
- light path
- optical system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses an optical path monitoring method based on an optical field camera. According to the method, the optical field camera performs imaging along the optical path of an optical system; through collection and processing of image information, whether the reflecting surfaces of reflectors have flaws and whether the optical path between the reflectors has bright spots can be judged; and the reflector with flaws and the position of the bright spot in the optical path can be determined. Overall systematic monitoring is performed on the optical path by use of features of long depth of field imaging, post focusing and depth measurement of the optical field camera, and working conditions of a plurality of reflectors in the optical path can be simultaneously monitored previously, afterwards or online. The method has the advantages of high monitoring efficiency and convenience in operation, thereby guaranteeing normal stable working of the optical system.
Description
Technical field
The present invention relates to a kind of monitoring method of optical system, particularly relate to a kind of light path monitoring method based on light-field camera, it is speculum and the monitoring method of light path between speculum and speculum in a kind of optical system.
Background technology
At optical technical field, normal work meaning is great reposefully for guarantee optical system for the system light path of intactly monitoring optical system.In optical system, whether the reflecting surface of in advance monitoring speculum in optical system exists flaw, and whether light path meets condition of work, at startup optical system front row except potential problems, can ensure optical system works.When optical system works, the situation of on-line monitoring light path, record can be carried out to the operating state of optical system, when not meeting condition of work when certain the optical element operating state in light path changes and alarm, reduce the risk damaging optical element in light path simultaneously.Monitor light path can by the state of contrast optical system before and after work afterwards, the operating characteristic of assessment optical system.
In addition, for sealing or the optical system with casing parcel, whether the optical element in investigation light path can normally work relative difficulty.Use artificial arrange distinguish method to waste time and energy, generally can only detect in advance or afterwards, be difficult to realize on-line checkingi, and artificial investigation is dangerous in laser system.Therefore, use camera to carry out monitoring along light path to optical system can well solve in the problems referred to above.The patent of invention " a kind of method of locating the speculum of reflecting surface existing defects " of Chinese Patent Application No. 201410481855.1 is by constantly regulating general camera camera lens, camera is focused the reflecting surface of in light path speculum successively, monitors the working condition of speculum.The method needs constantly to change camera parameter in observation process, to meet monitoring to speculum different in light path, thus is difficult to system and intactly monitors light path.Light-field camera effectively can overcome the problems referred to above with the imaging pattern of its uniqueness and image procossing mode.
Light-field camera is the Novel camera that can realize long depth field imaging, focusing and depth survey afterwards.In theory, light-field camera can the working condition of whole light path in the complete monitoring optical system of system, can determine position and the quantity of the speculum that there is flaw simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is: at optical technical field, and normal work meaning is great reposefully for guarantee optical system for the system light path of intactly monitoring optical system.In optical system, whether the reflecting surface of in advance monitoring speculum in optical system exists flaw, and whether light path meets condition of work, at startup optical system front row except potential problems, can ensure optical system works.When optical system works, the situation of on-line monitoring light path, record can be carried out to the operating state of optical system, when not meeting condition of work when certain the optical element operating state in light path changes and alarm, reduce the risk damaging optical element in light path simultaneously.Monitor light path can by the state of contrast optical system before and after work afterwards, the operating characteristic of assessment optical system.In addition, for sealing or the optical system with casing parcel, whether the optical element in investigation light path can normally work relative difficulty.Use artificial arrange distinguish method to waste time and energy, generally can only detect in advance or afterwards, be difficult to realize on-line checkingi, and artificial investigation is dangerous in laser system.
The present invention will solve the technical scheme that its technical problem adopts: a kind of light path monitoring method based on light-field camera, the method uses light-field camera along the light path imaging of optical system, judge whether the reflecting surface of speculum exists flaw and between speculum and speculum, whether light path exists bright spot by acquisition and processing image information, can determine to exist the position of bright spot in the speculum of flaw or light path simultaneously.The method in advance, afterwards or online working condition of simultaneously monitoring multiple speculum in light path, can the method is characterized in that implementation step is as follows:
Step (1), use light-field camera are along the light path imaging of optical system.
The camera lens of step (2), adjustment light-field camera, makes the speculum that it is focused in the middle part of light path, to ensure that the reflecting surface of all speculums in light path in optical system is all in the digital focusing range of light-field camera.
Step (3), the image collected according to light-field camera judge whether to have in light path the reflecting surface existing defects of speculum.
Step (4), there is the distance between the speculum of flaw and light-field camera camera lens according to the parameter of light-field camera and its parallax relation computational reflect to same objective point imaging surface, thus the particular location of speculum in whole light path can be determined.
Step (5), determine the position of the speculum of all reflecting surface existing defects successively, and determine its quantity.
Further, the speculum in described optical system comprises total reflective mirror and half-reflecting half mirror.
Further, described light-field camera is focus type light-field camera, and namely object point is by after the imaging of light-field camera primary mirror, and its picture point and sensitive chip are about microlens array conjugation.
Further, in described light-field camera the putting position of primary mirror, microlens array need meet same object point can imaging on two or more lenticule, to record parallax, thus according to the distance between disparity computation speculum and light-field camera camera lens.
Further, in described step (4), the distance between speculum and camera lens utilizes the parameter of primary mirror and microlens array in light-field camera and its to calculate the parallax relation of same objective point imaging according to binocular range measurement principle and perfect lens Gaussian imaging equation and obtains.
Principle of the present invention is: the present invention utilizes light-field camera can realize long depth field imaging, the characteristic of focusing and depth survey is afterwards monitored light path with carrying out total system, in advance, afterwards or online working condition of simultaneously monitoring multiple speculum in light path, position and the quantity of the speculum of reflecting surface existing defects in optical system can be determined simultaneously.
The present invention has the following advantages: the present invention is applied widely, whether there is flaw by the reflecting surface of the image information determination speculum collected and between speculum and speculum, whether light path exists bright spot, can determine to exist the position of bright spot in the speculum of flaw or light path simultaneously.This method can in advance, afterwards or online working condition of simultaneously monitoring multiple speculum in optical system, and the speculum of Timeliness coverage reflecting surface existing defects also determines its position in the optical path, to take safeguard measure in time; The present invention has the advantage that real-time is good, monitoring efficiency is high, easy to operate, provides safeguard for optical system normally works reposefully.
Accompanying drawing explanation
Fig. 1 is basic flow sheet of the present invention;
Fig. 2 is work system schematic diagram of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, in conjunction with work system schematic diagram of the present invention, the present invention is described in more detail.
1. number as shown in Figure 2, be made up of computer A, light-field camera B, spectroscope C, optical system D by the work system of light-field camera monitoring optical system, suppose that wherein optical system D comprises, three speculums such as 2. number and 3. number, its specific implementation method is as follows:
(1) use spectroscope C to build auxiliary optical path, make light-field camera B along the light path imaging of optical system D, and by image transfer to computer A.
(2) adjust the camera lens of light-field camera B, make it focus to be positioned in optical system D the 2. number speculum in the middle part of light path, to ensure in optical system D that in light path, all speculums are all in the digital focusing range of light-field camera B.
(3) image collected according to light-field camera B judges the reflecting surface existing defects whether having speculum in light path.
(4) suppose in light path, have the reflecting surface of speculum to there is flaw, there is the distance between the speculum of flaw and light-field camera camera lens according to the parameter of light-field camera B and its parallax relation computational reflect to same objective point imaging surface, thus there is flaw in which or which speculum in determining 1. number, 2. number and 3. number three speculums.
The above; be only the embodiment in the present invention, but protection scope of the present invention is not limited thereto, any people being familiar with this technology is in the technical scope disclosed by the present invention; the conversion or replacement expected can be understood, within the protection range that all should be encompassed in claims of the present invention.
Claims (5)
1. the light path monitoring method based on light-field camera, the method uses light-field camera along the light path imaging of optical system, judge whether the reflecting surface of speculum exists flaw and between speculum and speculum, whether light path exists bright spot by acquisition and processing image information, can determine to exist the position of bright spot in the speculum of flaw and light path simultaneously, the method can, is characterized in that: the method performing step is as follows in advance, afterwards or online working condition of simultaneously monitoring multiple speculum in light path:
Step (1), use light-field camera are along the light path imaging of optical system;
The camera lens of step (2), adjustment light-field camera, makes the speculum that it is focused in the middle part of light path, to ensure that the reflecting surface of all speculums in light path in optical system is all in the digital focusing range of light-field camera;
Step (3), the image collected according to light-field camera judge whether to have in light path the reflecting surface existing defects of speculum;
Step (4), there is the distance between the speculum of flaw and light-field camera camera lens according to the parameter of light-field camera and its parallax relation computational reflect to same objective point imaging surface, thus the particular location of speculum in whole light path can be determined;
Step (5), determine the position of the speculum of all reflecting surface existing defects successively, and determine its quantity.
2. a kind of light path monitoring method based on light-field camera according to claim 1, is characterized in that: the speculum in optical system comprises total reflective mirror and half-reflecting half mirror.
3. a kind of light path monitoring method based on light-field camera according to claim 1, it is characterized in that: the light-field camera that the method uses is focus type light-field camera, namely object point is by after the imaging of light-field camera primary mirror, and its picture point and sensitive chip are about microlens array conjugation.
4. a kind of light path monitoring method based on light-field camera according to claim 1, it is characterized in that: in the light-field camera that the method uses the putting position of primary mirror, microlens array need meet same object point can imaging on two or more lenticule, to record parallax, thus according to the distance between disparity computation speculum and light-field camera camera lens.
5. a kind of light path monitoring method based on light-field camera according to claim 1, it is characterized in that: in step (4), the distance between speculum and camera lens utilizes the parameter of primary mirror and microlens array in light-field camera and its to calculate the parallax relation of same objective point imaging according to binocular range measurement principle and perfect lens Gaussian imaging equation and obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510323214.7A CN104935919B (en) | 2015-06-12 | 2015-06-12 | A kind of light path monitoring method based on light-field camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510323214.7A CN104935919B (en) | 2015-06-12 | 2015-06-12 | A kind of light path monitoring method based on light-field camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104935919A true CN104935919A (en) | 2015-09-23 |
| CN104935919B CN104935919B (en) | 2017-08-08 |
Family
ID=54122847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510323214.7A Active CN104935919B (en) | 2015-06-12 | 2015-06-12 | A kind of light path monitoring method based on light-field camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104935919B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106713897A (en) * | 2017-02-27 | 2017-05-24 | 驭势科技（北京）有限公司 | Binocular camera and self-calibration method for binocular camera |
| CN106908016A (en) * | 2017-03-06 | 2017-06-30 | 中国科学院光电技术研究所 | A kind of concave surface hysteroscope curvature radius measurement method based on light-field camera |
| CN106954013A (en) * | 2017-04-19 | 2017-07-14 | 中国科学技术大学 | A kind of compact high-resolution light-field camera of double light path imaging |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130293726A1 (en) * | 2012-05-01 | 2013-11-07 | Joel S. Armstrong-Muntner | Lens Inspection System |
| CN104198501A (en) * | 2014-09-18 | 2014-12-10 | 中国科学院光电技术研究所 | Method for positioning reflector with flaw on reflecting surface |
-
2015
- 2015-06-12 CN CN201510323214.7A patent/CN104935919B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130293726A1 (en) * | 2012-05-01 | 2013-11-07 | Joel S. Armstrong-Muntner | Lens Inspection System |
| CN104198501A (en) * | 2014-09-18 | 2014-12-10 | 中国科学院光电技术研究所 | Method for positioning reflector with flaw on reflecting surface |
Non-Patent Citations (2)
| Title |
|---|
| 玉牙青青: "先拍照，后对焦——颠覆传统的光场相机Lytro", 《中国摄影家》 * |
| 米曾真: "基于数字图像处理技术的光学元件表面缺陷检测与分析", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106713897A (en) * | 2017-02-27 | 2017-05-24 | 驭势科技（北京）有限公司 | Binocular camera and self-calibration method for binocular camera |
| CN106713897B (en) * | 2017-02-27 | 2018-03-09 | 驭势（上海）汽车科技有限公司 | Binocular camera and the method for self-calibrating for binocular camera |
| CN106908016A (en) * | 2017-03-06 | 2017-06-30 | 中国科学院光电技术研究所 | A kind of concave surface hysteroscope curvature radius measurement method based on light-field camera |
| CN106954013A (en) * | 2017-04-19 | 2017-07-14 | 中国科学技术大学 | A kind of compact high-resolution light-field camera of double light path imaging |
| CN106954013B (en) * | 2017-04-19 | 2023-06-20 | 中国科学技术大学 | Compact high-resolution light field camera with double-light-path imaging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104935919B (en) | 2017-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180276819A1 (en) | Apparatus and method for evaluating quality of binocular vision of subject | |
| JP5632650B2 (en) | Inspection system and method using multi-image phase shift analysis | |
| CN105246636A (en) | Apparatus and method for determining the focus position of a high-energy beam | |
| CN103063415B (en) | A kind of long focus length of lens measuring method based on Moire fringe coupling | |
| CN204831226U (en) | A optics light path for detection lens center is inclined to one side and optical detection device thereof | |
| CN102252832A (en) | Wavefront quality detection device and method for large-aperture collimation system | |
| CN102778460A (en) | Method for detecting internal flaw of substrate | |
| CN106338343A (en) | Wavefront detection method based on Fresnel zone plate | |
| CN102825385A (en) | Non-contact temperature monitoring device for laser welding | |
| CN204228121U (en) | A kind of ellipsoidal mirror surface shape detection apparatus | |
| CN104935919A (en) | Optical path monitoring method based on optical field camera | |
| CN110125534A (en) | Method for monitoring protection glass | |
| CN203443741U (en) | Laser synchronous scanning imaging detection system | |
| CN203011419U (en) | An optical axis parallelism digital calibration instrument for multiple optical sensors | |
| CN102636130A (en) | Device for measuring surface profile of aspheric surface optical element in large dynamic range | |
| CN102928196A (en) | Detection method and device for free-form surface lens | |
| CN106841236B (en) | Transmission optical element defect testing device and method | |
| CN108152991A (en) | The assembly method and device of a kind of optical lens | |
| CN113624158B (en) | Visual dimension detection system and method | |
| CN104764593A (en) | Horizontal type double-port plane Fizeau interference testing device | |
| CN104048813A (en) | Method and device for recording laser damage process of optical element | |
| CN103323758A (en) | Solar blind ultraviolet imaging type distance measuring device | |
| CN204314057U (en) | A kind of focal length measuring equipment for Diode laser camera lens | |
| Bao et al. | Defocus and binocular vision based stereo particle pairing method for 3D particle tracking velocimetry | |
| CN202267590U (en) | Detecting device of free surface lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |