Registers – Coded record sensors – Particular sensor structure
Patent
1997-09-30
1999-12-21
Le, Thien Minh
Registers
Coded record sensors
Particular sensor structure
23547201, G06K 710
Patent
active
060037725
ABSTRACT:
Holographic laser scanning system employing a holographic scanning disc with holographic facets having dual-fringe contrast regions optimized for scanning and light collection operations. In the preferred embodiments, the first region of each holographic facet is optimized for laser light having a first polarization state, whereas the second portion thereof is optimized for laser light having a second polarization state. The dual-fringe contrast scanning disc construction of the present invention provides for improved laser scanning efficiency during scanning operation, and improved laser light collection efficiency during laser light collection/detection operation within the system.
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Amundsen Thomas
Dickson LeRoy
Groot John
Knowles Carl Harry
Le Thien Minh
Metrologic Instruments Inc.
Perkowski, Esq. Thomas J.
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