DocumentCode
1274050
Title
Dual numerical aperture confocal operation of moving fibre bar code reader
Author
Roberts, D.A. ; Syms, R.R.A. ; Holmes, A.S. ; Yeatman, E.M.
Author_Institution
Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
Volume
35
Issue
19
fYear
1999
fDate
9/16/1999 12:00:00 AM
Firstpage
1656
Lastpage
1658
Abstract
A compact bar code reader using pre-lens scanning by a piezoelectrically-actuated vibrating optical fibre cantilever is demonstrated. Dual numerical aperture confocal operation, based on transmission of a guided mode and reception of cladding modes, is shown to be a simple method for increasing and separating the return signal
Keywords
gradient index optics; mark scanning equipment; optical fibre filters; optical fibres; optical scanners; cladding modes; compact bar code reader; dual numerical aperture confocal operation; guided mode; moving fibre bar code reader; piezoelectrically-actuated vibrating optical fibre cantilever; pre-lens scanning; reception; return signal; transmission;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19991139
Filename
807053
Link To Document