06209789 is referenced by 169 patents and cites 19 patents.

A novel optical filtering system for a laser bar code scanner having narrow band-pass characteristics is disclosed. The optical filtering system has two different optical filtering elements which are disposed in a scanner housing in a spatially separate relationship. One of the optical filtering elements is positioned inside of the scanner housing in front of and close to the light detection element. The other optical filtering element is positioned in the light transmission aperture of the scanner housing and forms the scanning window. The optical filtering characteristics of the scanning window obscure the internal components of the scanner from plain view making the scanner appear more aesthetically pleasing. Together the optical filtering element cooperate to form a narrow-band pass filter to provide for better light collection and scanning.

Title
Optical filtering system for a laser bar code scanner having narrow band-pass characteristics employing spatially separated filtering elements including a scanner window
Application Number
9/436742
Publication Number
6209789 (B1)
Application Date
November 9, 1999
Publication Date
April 3, 2001
Inventor
Carl H Knowles
Moorestown
NJ, US
David M Wilz Sr
Sewell
NJ, US
George Rockstein
Audobon
NJ, US
Robert Blake
Woodbury Heights
NJ, US
Thomas Amundsen
Turnersville
NJ, US
Agent
Nancy A Smith Esq
US
Assignee
Metrologic Instruments
NJ, US
IPC
G06K 7/10
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