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CAS IR Grid
机构
长春光学精密机械与物... [3]
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OAI收割 [3]
内容类型
会议论文 [3]
发表日期
2012 [1]
2007 [2]
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Optimum design of laser encoding and decoding on laser beam-riding guidance (EI CONFERENCE)
会议论文
OAI收割
2nd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2011, December 11, 2011 - December 13, 2011, Taichung, Taiwan
作者:
Yang L.
;
Yang L.
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浏览/下载:24/0
  |  
提交时间:2013/03/25
Operating principle of laser beam-riding guidance was set forth. Based on the principle of spatial frequency-encoding
experimental results demonstrated that the receiver can receive correctly the encoded signal and can decode the signal
an optimum laser encoding mode was designed
measurement for the missdistance is feasible and all the performance parameters satisfy the demand. (2012) Trans Tech Publications
which can transfer continuous laser into pulse laser that represents different position information. Then the mathematic model of deviation from target is built
Switzerland.
a modified encoding pattern was presented
which is composed of two light paths crossed 90. Azimuth information of target is given in orthogonal coordinate system and deviation from target is linearity. As well as
characteristic distribution of spatial laser field is analyzed. Corresponding decoding mode was presented
by testing in 2 kilometers outdoor
Research on 10.6 m laser beam monitoring in CO2 laser processing system (EI CONFERENCE)
会议论文
OAI收割
Infrared Materials, Devices, and Applications, November 12, 2007 - November 15, 2007, Beijing, China
作者:
Gao Y.
;
Shao S.
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浏览/下载:19/0
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提交时间:2013/03/25
It is a key point of CO2 laser beam monitoring in the CO 2 laser processing system to achieve alignment between CO2 laser and PL (pointing and launching) system. By monitoring the angle offset of CO2 laser beam
the compensation can be gotten witch is given to fast-steering mirror to rectify the direction of laser beam. But the normal photoelectric detector can not get the laser signal because of CO2 laser's high energy and long wavelength. Its wavelength is 10.6m and its power can reach kW level. Consequently
it is difficult to detect the high-energy 10.6m laser beam directly. So
we monitored the output mirror of laser resonator superseded the laser beam
indirectly. The laser beam monitoring system could be designed based on CCD laser auto-collimation angular measurement principle and image processing method. In this paper
application of CCD laser auto-collimation angular measurement principle and image processing method for CO2 laser beam monitoring system is introduced particularly
After design
fabrication and alignment
the monitoring system can be used for experimental study that including angular measurement accuracy and angle offset measurement of CO2 laser beam. Angle offset range and angle variation rule of CO2 laser beam is also can be acquired for further research.
Scaling and analyzing the influence of fluid surface of fluid with nano-granular through speckle pattern experiment (EI CONFERENCE)
会议论文
OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者:
Wang X.
;
Wang Y.
;
Wang Y.
;
Wang Y.
;
Wang Y.
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浏览/下载:12/0
  |  
提交时间:2013/03/25
An optical system with double beam interference system was designed to measure the movement of nano-particles in fluid with laser speckle technology. In order to investigate the influence of the scattering light generated from liquid surface on speckle patterns
the liquid surface contour was dynamically detected by WYKO during nano-particle movement. The result demonstrates that the fluctuation of fluid surface is slight. Meanwhile
in order to further analyze this effect
a piece of ground glass was employed. The process of ground glass to be polished to optical glass was studied and tested continuously using WYKO and laser speckle technology. And then
the speckle patterns generated from kerosene fluid surface were studied. By contrast
the results show that
the fluid surface is transparent to the measurement wavelength. The influence of the surface of fluid can be neglected. Furthermore
the conclusion illustrates that laser speckle technique is an effective and reliable method to study the movement of nano-granular in fluid.