The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2005
Filed:
Nov. 20, 2002
Frank Check, San Jose, CA (US);
Leroy Dickson, Morgan Hill, CA (US);
John Groot, San Jose, CA (US);
C. Harry Knowles, Moorestown, NJ (US);
Frank Check, San Jose, CA (US);
LeRoy Dickson, Morgan Hill, CA (US);
John Groot, San Jose, CA (US);
C. Harry Knowles, Moorestown, NJ (US);
Metrologic Instruments, Inc., Blackwood, NJ (US);
Abstract
A holographic laser scanner of ultra-compact design capable of reading bar and other types of graphical indicia within a large scanning volume using holographic optical elements and visable laser diodes. The holographic optical elements are arranged on the scanning disc in such a manner so that none of the laser scanning planes generated within the 3-D scanning volume of the system are spatially and temporally coincident with any other laser scanning plane within the 3-D scanning volume. This novel feature of the present invention ensures that there is substantially zero cross-talk at the plurality of photodetectors provided within the system, significantly improving the performance of the system.