Optical encoder based on the Lau effect

2000 ◽  
Vol 39 (3) ◽  
pp. 817 ◽  
Author(s):  
Daniel Crespo
Keyword(s):  
Optical Encoder

Investigation of Gap Dependency of Distortion in Output Signal from Scale Slit of Optical Encoder

2010 ◽  
Vol 130 (12) ◽  
pp. 1356-1362
Author(s):  
Hajime Nakajima ◽  
Kazuhiko Sumi ◽  
Hiroshi Inujima
Keyword(s):  
Output Signal ◽  
Optical Encoder

scholarly journals Development of a Pneumatic Cylinder with a Micro Optical Encoder and its Applications to Position/Force Servo Systems

2008 ◽  
Vol 39 (2) ◽  
pp. 34-39 ◽  
Author(s):  
Yasutaka NISHIOKA ◽  
Koichi SUZUMORI ◽  
Junichi TANAKA ◽  
Atsushi SASAKI ◽  
Muneo TOYAMA ◽  
...  
Keyword(s):  
Pneumatic Cylinder ◽  
Optical Encoder ◽  
Servo Systems

The Method for Real-Time Length Measurement of Fiber Winding

2013 ◽  
Vol 380-384 ◽  
pp. 919-922
Author(s):  
Chen Xia Guo ◽  
Rui Feng Yang
Keyword(s):  
Real Time ◽  
Detection Algorithm ◽  
Moving Target ◽  
Fiber Optic Gyroscope ◽  
Optical Encoder ◽  
The Real ◽  
Time Length ◽  
Fiber Coil ◽  
Fiber Winding ◽  
Coil Winding

The paper discusess mainly how to accurately measure the real-time length of fiber optic gyroscope sensing coil (fiber coil) in the process of FOG coil winding. First, using the improved moving target detection algorithm to process the fiber images collected by machine vision. Secondly, using software algorithm to calculate the real-time radius of fiber winding. Finaly, combining the incremental optical encoder with real-time radius to calculate real-time winding length of fiber coil.

Development of a polar-coordinate optical encoder: principle and application

2018 ◽  
Vol 57 (01) ◽  
pp. 1 ◽  
Author(s):  
Guoyong Ye ◽  
Hongzhong Liu ◽  
Xuan Li ◽  
Haoyu Yu ◽  
Bingheng Lu
Keyword(s):  
Optical Encoder ◽  
Polar Coordinate

scholarly journals Miniaturized Optical Encoder with Micro Structured Encoder Disc

2019 ◽  
Vol 9 (3) ◽  
pp. 452 ◽  
Author(s):  
Jonathan Seybold ◽  
André Bülau ◽  
Karl-Peter Fritz ◽  
Alexander Frank ◽  
Cor Scherjon ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
Precision Machining ◽  
Signal Acquisition ◽  
Optical Encoder ◽  
Diffraction Of Light ◽  
Application Specific Integrated Circuit ◽  
Ultra Precision ◽  
Absolute Encoder ◽  
Micro Structures ◽  
Application Specific

A novel optical incremental and absolute encoder based on an optical application-specific integrated circuit (opto-ASIC) and an encoder disc carrying micro manufactured structures is presented. The physical basis of the encoder is the diffraction of light using a reflective phase grating. The opto-ASIC contains a ring of photodiodes that represents the encryption of the encoder. It also includes the analog signal conditioning, the signal acquisition, and the control of a light source, as well as the digital position processing. The development and fabrication of the opto-ASIC is also described in this work. A laser diode was assembled in the center on top of the opto-ASIC, together with a micro manufactured polymer lens. The latter was fabricated using ultra-precision machining. The encoder disc was fabricated using micro injection molding and contains micro structures forming a blazed grating. This way, a 10-bit optical encoder with a form factor of only 1 cm3 was realized and tested successfully.

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