CN100529736C - Zero calibration method for BRDF measuring system - Google Patents
Zero calibration method for BRDF measuring system Download PDFInfo
- Publication number
- CN100529736C CN100529736C CN 200510038628 CN200510038628A CN100529736C CN 100529736 C CN100529736 C CN 100529736C CN 200510038628 CN200510038628 CN 200510038628 CN 200510038628 A CN200510038628 A CN 200510038628A CN 100529736 C CN100529736 C CN 100529736C
- Authority
- CN
- China
- Prior art keywords
- target center
- detector
- collimating aperture
- completely reflecting
- zero
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a method of adjusting the zero point for the BRDF measure system. It makes use of a visible light beam and applies the geometrical optical method to adjust accurately the three axis's' zero points in the system and insure that the three axis's are mutually perpendicular. The accuracy can amount to 0.1 degrees while the invention shortens the time cost by adjusting the zero point greatly.
Description
Technical field
The present invention relates to optical technical field, automatic control technology field and rectangular coordinate system in space collimation technique field, a kind of specifically BRDF measuring system zero adjustment method.
Technical background
BRDF (Bidirectional Reflectance Distribution Function, the bidirectional reflectance distribution function) measuring system changes the attitude of sample in three dimensions by the rotation of three stepper motors, to change the various angles of incident and reception.Under the perfect condition, three of rectangular coordinate system in space should be orthogonal, that is our said zero-bit is accurate.For many years, its zero adjustment problem is never solved preferably, has had influence on precision and the efficient measured.
The zero adjustment method that always adopts is at present: with the canonical reference plate is print, and one group of data is surveyed in examination.In theory, the canonical reference plate is isotropic print, and its scattering curve is a cosine curve.If the curve that records meets cosine curve, just think that system's zero-bit is accurately, otherwise, determine it is which motor zero-bit is inaccurate by the characteristic of analyzing examination survey curve, survey again after the adjustment, analyze again, adjust again, meet cosine curve up to examination survey curve.Zero adjustment just becomes very loaded down with trivial details, as a to lose time job like this.
Content of the present invention
The invention discloses a kind of BRDF measuring system zero adjustment method, utilize visible collimated light beam calibration, use method of geometrical optics, accurate three zero-bit in the calibration system, guarantee three orthogonal, precision can reach 0.1 degree, and has greatly shortened time of zero adjustment.
Technical scheme of the present invention
BRDF measuring system zero adjustment method, it is characterized in that on BRDF measuring system basis, (1), the target center sign is set directly over specimen holder, at the detector rear laser instrument is set, a collimating aperture is set directly over detector and the lens, a collimating aperture is set directly over the completely reflecting mirror group on the worktable, guarantee target center and each collimating aperture and laser coaxial, after opening wavelength and being the ruddiness visible laser of 635nm, if light beam shines on the target center sign by several collimating apertures successively, then represent detector, lens and rectangular coordinate system in space the Z axle on same straight line; (2), respectively in the dead ahead of target center sign and laser instrument, one group of completely reflecting mirror group respectively is set, and the collimating aperture rear on detector is provided with a location target center sign again, adjust the position of three motors, make and reflect through two groups of completely reflecting mirrors when laser instrument sends light, arrive location target center sign through collimating aperture again, then three of X, the Y in the representation space rectangular coordinate system, Z are orthogonal, have promptly determined the zero-bit of three motors simultaneously.
Described method is characterized in that described completely reflecting mirror group all can replace with right-angle prism.
Principle of the present invention
BRDF (Bidirectional Reflectance Distribution Function, the bidirectional reflectance distribution function) measuring system comprises the light path transmitting station that three stepper motors are installed, motor A1 is coaxial with motor C3, motor B2 is vertical mutually with the axle of motor A1, motor A1 the axle on motor B2 axes intersect place, be provided with specimen holder, on the axial light path transmitting station of motor B2, be placed with light source, chopper, diaphragm, beam expander, reference path detector, beam splitting chip, right-angle prism, convex lens successively; B2 is axial at motor, and the light path transmitting station outside is placed with the reflected light path detector.System changes the attitude of sample in three dimensions by the rotation of three stepper motors of control, to change the various angles of incident and reception.Under the perfect condition, three of rectangular coordinate system in space should be orthogonal, that is our said zero-bit is accurate.
This calibration steps sends visible light beam according to the geometrical optics principle of reflection by collimated light source, at first allow light beam successively by several foresights and shine the collimation target center on, the Z axle of determining detector, lens and rectangular coordinate system in space is on same straight line.Both at first determined the zero-bit of motor C3.Mutually perpendicular plane mirror group (or pair of straight angle prism) is installed above specimen holder then, a pair of plane mirror parallel to each other (or pair of straight angle prism) is installed in collimated light source the place ahead:
If the zero-bit of 1 motor B2 is inaccurate, then according to the principle of reflection light beam after level crossing group reflection, can't arrive the level crossing group, folded light beam just can not occur and not collimate the phenomenon of the accurate heart through each.
If the zero-bit of 2 motor A1 is inaccurate, then light beam is through level crossing group reflection, arrive above the level crossing group mirror reflects after, can't arrive that piece catoptron below the level crossing group, can not occur folded light beam yet and collimate the phenomenon of the accurate heart through each.
So, having only when the zero-bit of three motors is all accurate, light beam after reflection can collimate the accurate heart by each, and the final collimation target center that arrives.
Effect of the present invention
One, improved the precision of zero adjustment, this is that the precision of sample is that present calibration means institute is unrivaled.
Two, greatly shortened the time of zero adjustment, generally speaking, as long as about 15 minutes, (alignment time is depended on preceding each the motor zero drift size of calibration), and carried out this need of work at present two to three days.
Three, this device goes for the zero adjustment of all rectangular coordinate system in space.
Description of drawings
Fig. 1 theory structure synoptic diagram of the present invention.
Embodiment
BRDF (Bidirectional Reflectance Distribution Function, the bidirectional reflectance distribution function) measuring system is by the worktable on motor A1 and motor A1 specimen holder 5, motor B2, motor C3 and the motor C3 pivoted arm 4 on axially, worktable over against reflected light path detector 14 formations such as grade, worktable is same to be placed with light source 6, chopper 7, diaphragm 8, beam expander 9, reference path detector 10, beam splitting chip 11, completely reflecting mirror group 12, convex lens 13 on axially successively.
When BRDF measuring system zero adjustment method is specifically implemented, target center sign 22 is set directly over specimen holder 5, at detector 14 rears laser instrument 15 is set, directly over detector 14 and the lens 13 collimating aperture 18 is set, collimating aperture 19, a collimating aperture 20 is set directly over the completely reflecting mirror group 12 on the worktable, guarantee target center sign 22 and each collimating aperture 18, collimating aperture 19, collimating aperture 20 and laser instrument 15 are coaxial, open laser instrument 15 (wavelength 635nm, ruddiness is as seen) after, if light beam shines on the target center sign 22 by several collimating apertures successively, then represent detector 17, lens 13 and rectangular coordinate system in space the Z axle on same straight line; Respectively in the dead ahead of target center sign 22 with laser instrument 15, one group of completely reflecting mirror group 21, completely reflecting mirror group 16 respectively are set, and 18 rears of the collimating aperture on detector 14 are provided with a location target center sign 17 again, adjust the position of three motors, make and reflect through two groups of completely reflecting mirrors when laser instrument 15 sends light, arrive location target center sign 17 through collimating aperture 18 again, then three of X, the Y in the representation space rectangular coordinate system, Z are orthogonal, have promptly determined the zero-bit of three motors simultaneously.Completely reflecting mirror group 12, completely reflecting mirror group 16, completely reflecting mirror group 21 all can replace with right-angle prism.
Claims (2)
1, BRDF measuring system zero adjustment method, it is characterized in that on BRDF measuring system basis, (1), the target center sign is set directly over specimen holder, at the detector rear laser instrument is set, a collimating aperture respectively is set directly over detector and the lens, a collimating aperture is set directly over the completely reflecting mirror group on the worktable, guarantee target center and each collimating aperture and laser coaxial, after opening wavelength and being the ruddiness visible laser of 635nm, if light beam shines on the target center sign by several collimating apertures successively, then represent detector, the Z axle of lens and rectangular coordinate system in space is on same straight line; (2), respectively in the dead ahead of target center sign and laser instrument, one group of completely reflecting mirror group respectively is set, and the collimating aperture rear above detector is provided with a location target center sign, adjust the position of three motors, make and reflect through two groups of completely reflecting mirrors when laser instrument sends light, arrive location target center sign through collimating aperture again, then three of X, the Y in the representation space rectangular coordinate system, Z are orthogonal, have promptly determined the zero-bit of three motors simultaneously.
2, method according to claim 1 is characterized in that described completely reflecting mirror group all can replace with right-angle prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038628 CN100529736C (en) | 2005-03-28 | 2005-03-28 | Zero calibration method for BRDF measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038628 CN100529736C (en) | 2005-03-28 | 2005-03-28 | Zero calibration method for BRDF measuring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1693876A CN1693876A (en) | 2005-11-09 |
| CN100529736C true CN100529736C (en) | 2009-08-19 |
Family
ID=35352943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510038628 Expired - Fee Related CN100529736C (en) | 2005-03-28 | 2005-03-28 | Zero calibration method for BRDF measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100529736C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928533B (en) * | 2006-09-22 | 2010-05-12 | 中国科学院安徽光学精密机械研究所 | Outdoor high optical spectrum BRDF automatic detection method |
| CN101833304B (en) * | 2009-03-10 | 2011-08-10 | 北京信息科技大学 | Method for measuring positioning accuracy of numerical control rotary table by using photoelectric auto-collimator |
| CN102162751B (en) * | 2010-08-25 | 2012-12-05 | 中国计量科学研究院 | Method for measuring space optical distribution function |
| CN102279455B (en) * | 2011-06-28 | 2012-12-12 | 公安部第一研究所 | Method for precisely locating laser beam space |
| CN103344612A (en) * | 2013-06-20 | 2013-10-09 | 上海无线电设备研究所 | Measurement container and measurement method capable of eliminating measurement influences of container to water surface BRDF |
| TWI545310B (en) * | 2015-09-09 | 2016-08-11 | 國立中央大學 | Optic distribution meter |
| CN105698639B (en) * | 2016-03-07 | 2018-09-11 | 辽宁工业大学 | A kind of auto shock absorber cubing and match method for relocating |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5637873A (en) * | 1995-06-07 | 1997-06-10 | The Boeing Company | Directional reflectometer for measuring optical bidirectional reflectance |
| CN1295242A (en) * | 2000-12-08 | 2001-05-16 | 中国科学院上海光学精密机械研究所 | Small light spot detector for CD driver objective |
| CN2456166Y (en) * | 2000-12-28 | 2001-10-24 | 康达（成都）电子有限公司 | Oxygen sensor |
| CN1357744A (en) * | 2000-12-29 | 2002-07-10 | 天津理工学院 | Single-beam laser collimation/alignment measurement technology |
| US20040061784A1 (en) * | 2002-07-17 | 2004-04-01 | Kenneth Perlin | BRDF analyzer |
| WO2004111688A2 (en) * | 2003-06-06 | 2004-12-23 | New York University | Method and apparatus for determining a bidirectional reflectance distribution function of a subject |
-
2005
- 2005-03-28 CN CN 200510038628 patent/CN100529736C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5637873A (en) * | 1995-06-07 | 1997-06-10 | The Boeing Company | Directional reflectometer for measuring optical bidirectional reflectance |
| CN1295242A (en) * | 2000-12-08 | 2001-05-16 | 中国科学院上海光学精密机械研究所 | Small light spot detector for CD driver objective |
| CN2456166Y (en) * | 2000-12-28 | 2001-10-24 | 康达（成都）电子有限公司 | Oxygen sensor |
| CN1357744A (en) * | 2000-12-29 | 2002-07-10 | 天津理工学院 | Single-beam laser collimation/alignment measurement technology |
| US20040061784A1 (en) * | 2002-07-17 | 2004-04-01 | Kenneth Perlin | BRDF analyzer |
| WO2004111688A2 (en) * | 2003-06-06 | 2004-12-23 | New York University | Method and apparatus for determining a bidirectional reflectance distribution function of a subject |
Non-Patent Citations (1)
| Title |
|---|
| 用双向反射法测量漆层的红外发射率. 谢品华，魏庆农，刘建国等.激光与红外，第29卷第1期. 1999 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1693876A (en) | 2005-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100529736C (en) | Zero calibration method for BRDF measuring system | |
| US7969560B2 (en) | Optical property sensor | |
| CN104391291B (en) | Fine particle laser radar system with adjustable focal position and self-calibration method | |
| US8760666B2 (en) | Method and apparatus for measuring spacings between optical surfaces of an optical system | |
| US8913234B2 (en) | Measurement of the positions of centres of curvature of optical surfaces of a multi-lens optical system | |
| CN105424322A (en) | Self-calibration optical axis parallelism detector and detection method | |
| CN101718534A (en) | Parallelism detector for optical axis of multi-optical system | |
| CN100442010C (en) | Single-photodetector confocal laser triangulation device | |
| CN107941477B (en) | Spectroscope measurement method and device capable of accurately controlling incident angle | |
| CN103344609B (en) | A kind of Miniature Fourier transform spectrometer | |
| CN101113890A (en) | Multidimensional full field optical calibrator | |
| CN101339008B (en) | Device for checking heavy caliber paraboloidal mirror K value coefficient | |
| CN210198958U (en) | Device for measuring road marking luminosity performance | |
| CN100462773C (en) | Method for accurate determination of laser transmitting-receiving path coaxial reference using Zernike coefficient | |
| CN103439294A (en) | Angle modulation and wavelength modulation surface plasmon resonance (SPR) sharing system | |
| US20210041237A1 (en) | Surveying Instrument | |
| US4171910A (en) | Retroreflectance measurement system | |
| CN110471047A (en) | A kind of scaling method of polarization lidar | |
| US20040263854A1 (en) | Beam shifting surface plasmon resonance system and method | |
| CN215727694U (en) | Specular reflectivity measuring device | |
| CN207894588U (en) | The more field image quality detecting devices of optical lens based on prism of corner cube | |
| CN2651769Y (en) | Hollow polyhedral angle reflector | |
| CN2190293Y (en) | Positive incident reflecting optic spectrometer | |
| TW200804756A (en) | A system for detecting errors of a one-dimensional five degrees of freedom(DOF) system | |
| CN220304798U (en) | Right angle error detection auxiliary device for pentaprism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20120328 |