High precision contactless object-diameter measurement using IR light source

2009 ◽  
Author(s):  
Xinwen Gao ◽  
Wei Ding ◽  
Tongyue Gao ◽  
Zhenbang Gong
Keyword(s):  
Light Source ◽  
High Precision ◽  
Diameter Measurement ◽  
Ir Light

Design of light source for ultra-high precision fiber optic gyroscope

2021 ◽  
Author(s):  
Xin Chen ◽  
Miao Yan ◽  
Jie Yu ◽  
Ruoxiang Tang
Keyword(s):  
Light Source ◽  
High Precision ◽  
Fiber Optic ◽  
Fiber Optic Gyroscope

scholarly journals Optimization of end-fire coupling between an LED mid-IR light source and SiNx optical waveguides for spectroscopic sensing

2021 ◽  
pp. 100174
Author(s):  
Pawaphat Jaturaphagorn ◽  
Nattaporn Chattham ◽  
Pichet Limsuwan ◽  
Papichaya Chaisakul
Keyword(s):  
Light Source ◽  
Optical Waveguides ◽  
Ir Light

High precision digital control LED spot light source used to calibrate CCD camera

2013 ◽  
Vol 6 (5) ◽  
pp. 759-766
Author(s):  
郭汉洲 GUO Han-zhou ◽  
吴振刚 WU Zhen-gang ◽  
宋宣晓 SONG Xuan-xiao
Keyword(s):  
Light Source ◽  
High Precision ◽  
Digital Control ◽  
Ccd Camera

Application of high-precision temperature-controlled FBG filter and light source self-calibration technique in the BOTDR sensor system

2012 ◽  
Vol 10 (7) ◽  
pp. 072901-72904 ◽  
Author(s):  
Jiacheng Hu Jiacheng Hu ◽  
Fuchang Chen Fuchang Chen ◽  
Chengtao Zhang Chengtao Zhang ◽  
Zunqi Lin Zunqi Lin
Keyword(s):  
Light Source ◽  
High Precision ◽  
Sensor System ◽  
Calibration Technique ◽  
Self Calibration ◽  
Precision Temperature ◽  
Temperature Controlled

scholarly journals Automatic loop centring with a high-precision goniometer head at the SLS macromolecular crystallography beamlines

2011 ◽  
Vol 18 (4) ◽  
pp. 595-600 ◽  
Author(s):  
Anuschka Pauluhn ◽  
Claude Pradervand ◽  
Daniel Rossetti ◽  
Marco Salathe ◽  
Clemens Schulze-Briese
Keyword(s):  
Data Collection ◽  
Light Source ◽  
High Precision ◽  
Initial Position ◽  
Macromolecular Crystallography ◽  
Centre Of Mass ◽  
Mass Detection ◽  
Swiss Light Source ◽  
Set Up ◽  
Goniometer Head

Automatic loop centring has been developed as part of the automation process in crystallographic data collection at the Swiss Light Source. The procedure described here consists of an optional set-up part, in which the background images are taken, and the actual centring part. The algorithm uses boundary and centre-of-mass detection at two different microscope image magnifications. Micromounts can be handled as well. Centring of the loops can be achieved in 15–26 s, depending on their initial position, and as fast as manual centring. The alignment of the sample is carried out by means of a new flexural-hinge-based compact goniometer head. The device features an electromagnet for robotic wet mounting of samples. The circle of confusion was measured to be smaller than 1 µm (r.m.s.); its bidirectional backlash is below 2 µm.

High Precision Online Measurement Technology to Large Diameter

2013 ◽  
Vol 303-306 ◽  
pp. 376-381
Author(s):  
Wang Biao ◽  
Xiao Fen Yu ◽  
Cong Yu Xu ◽  
Jia Wen Hu
Keyword(s):  
High Precision ◽  
Large Diameter ◽  
Displacement Sensor ◽  
Measurement Technology ◽  
Online Measurement ◽  
Shape Error ◽  
Diameter Measurement ◽  
Compression Deformation ◽  
Extended Uncertainty ◽  
Rolling Wheel

Because of the large diameter’s big volume, heavy weight, high thermal capacity and bad measurement environment, the workpiece’s diameter can only be detected in the processing locale. Though the rolling-wheel method can realize the large diameter online measurement, it can not achieve the diameter high precision measurement influenced by rolling-wheel skidding, compression deformation and temperature distribution. Focusing on the above problem, a new multi function rolling-wheel large diameter measurement system is designed. The designed system mainly researches the main error resource’s distinguish and amendment methods, such as the round grating graduator error, rolling-wheel shape error, rolling-wheel compression deformation, skidding of rolling-wheel to measured axis workpiece and its non-uniform temperature etc. The system can obtain the measured axis’s diameter and roundness real time while getting the needed information of error amendment by integrating multi opto-electronic switch, round grating, reference grating, micro-displacement sensor, temperature sensor etc. The system can realize diameter measurement extended uncertainty 5Dμm(D:1m～10m) and roundness measurement extended uncertainty 1.5Dμm.

Attenuation Rule of Underwater Irradiation of Artificial Light Source

2013 ◽  
Vol 807-809 ◽  
pp. 215-218
Author(s):  
Ze Jin Gao ◽  
Xian Qiu Zhang ◽  
Guo Xiang Wang ◽  
Liang Zhang ◽  
Min Qing Wang ◽  
...  
Keyword(s):  
Light Source ◽  
High Precision ◽  
Artificial Light ◽  
Submerged Plants ◽  
Light Spectrum ◽  
Muddy Water ◽  
Total Irradiation ◽  
Artificial Light Source ◽  
Attenuation Rate ◽  
Mixed Water

Using artificial light source to supplement light for submerged plants in water where the illumination is insufficient can promote the growth and improve the purification ability of submerged plants. The attenuation rule of underwater irradiation is the key to design and place the lamps. High-precision underwater spectrograph was adopted to study the underwater light spectrum and attenuation rule of underwater irradiation. The results showed that the attenuation rate of total irradiation (E) with depth (h) and turbidity (t) in algae water is the most remarkable; the relationships of E with h and t in different water were E1(t,h)=E0e-K(t)h=E0e-(0.1345t+0.1206)h(muddy water), E2(t,h)=E0e-K(t)h=E0e-(0.203t+0.4684)h(algae water) and E3(t,h)=E0e-K(t)h=E0e-(0.1708t+0.2279)h(mixed water). By these relationships, the position of artificial light could be calculated.

Temple of Zeus: A Micro Replica

2009 ◽  
Author(s):  
Aditya N. Das ◽  
Rakesh Murthy
Keyword(s):  
Light Source ◽  
High Precision ◽  
Silicon Substrate ◽  
Epoxy Adhesive ◽  
Silicon On Insulator ◽  
Etching Process ◽  
Ion Etching ◽  
Cost Efficient ◽  
Micro Structures ◽  
Microassembly Robot

A miniature replica of “Temple of Zeus” has been built on a 1cm2 silicon die. The micro components have been fabricated on SOI (silicon-on-insulator) wafer using photolithography patterning and DRIE (deep-reaction-ion-etching) process. These micro components have been picked up and manipulated using a vacuum micro needle mounted on a high precision microassembly robot. After alignment the components are bonded to the silicon substrate using epoxy adhesive. A spherical sapphire lens has also been mounted on a micro tower made of silicon. This lens acts as a light source which illuminates the micro temple by diffusing a ray of light onto it. This micro replica of “Temple of Zeus” and other micro structures as well, have been built as a part of research on automated 3D microassembly at ARRI’s Texas Microfactory which demonstrates the versatility in developing robust, cost efficient and heterogeneous microsystems of future.

A Novel Method of Diameter Measurement by Laser Scanning Based on Flat-Crystal

2011 ◽  
Vol 467-469 ◽  
pp. 1604-1609 ◽  
Author(s):  
Yi Wang ◽  
Yong Jie Ren ◽  
Chang Jie Liu ◽  
S.H. Ye
Keyword(s):  
Measurement Error ◽  
Theoretical Analysis ◽  
High Precision ◽  
Laser Scanning ◽  
Propagation Direction ◽  
Diameter Measurement ◽  
Measurement Device ◽  
The Core ◽  
Scanning Beam ◽  
Novel Method

A novel diameter measurement device by laser scanning of which a flat-crystal was used as the core scanning part was designed. The device can generate high parallel scanning beam by means of the property that a beam won’t change its propagation direction after transmitting a flat-crystal. The influences on measurement error and range by using flat-crystal were analyzed in details. Theoretical analysis showed that the method was easy to realize and achieve high precision.

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