Title :
Study on Dynamic Collimating and Detecting Method for Code-Bar Grade Rod
Author :
Huang, Qiuhong ; Qiu, Zongming ; Li, Lin ; Zhao, Niannian ; Geng, Jianxu
Author_Institution :
Sch. of Mech. & Instrum. Eng., Xi´´an Univ. of Technol., Xi´´an, China
Abstract :
Photoelectric collimating and detecting principle to stripe edge on code-bar invar grade rod was analyzed in this paper. A "???" shape slit aperture was designed, and differential signals to collimate and detect stripe edge were constructed, which were used to dynamically generate collimating signal to stripe edge. Meanwhile, it is robust to the interference of noise. Using the collimating system with "Sj" shape slit aperture to collimate and detect grade rod stripe edge dynamically, experiment result shows that repetition error is less than 2 mum, which provides an effective method for collimating and detecting code-bar invar grade rod.
Keywords :
optical collimators; optical noise; photodetectors; rods (structures); code-bar invar grade rod; dynamic collimating method; dynamic detecting method; noise interference; photoelectric collimating method; slit aperture; Apertures; Brightness; Gas detectors; Instruments; Optical collimators; Optical imaging; Optical microscopy; Partial response channels; Shape; Signal design;
Conference_Titel :
Photonics and Optoelectronics, 2009. SOPO 2009. Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4412-0
DOI :
10.1109/SOPO.2009.5230169
