Optical: systems and elements – Deflection using a moving element – With particular mount or drive for element
Patent
1992-05-15
1995-02-21
Look, Edward K.
Optical: systems and elements
Deflection using a moving element
With particular mount or drive for element
359213, 235462, G06K 710
Patent
active
053921500
ABSTRACT:
A crystal resonant scanner has a scanning mirror which is cyclically reciprocally oscillatable for reflecting and deflecting a laser beam emitted by a laser beam source to scan an optically detectable pattern of information such as a bar code. A concave mirror is fixed in position for converging a light beam reflected off the optically detectable pattern upon scanning the optically detectable pattern with the light beam reflected by the scanning mirror. The concave mirror has a hole defined substantially centrally therein, and the scanning mirror is positioned in the hole. The light beam converged by the concave mirror is detected by a photodetector. The laser beam source and the photodetector are positioned in front of the scanning mirror and the concave mirror. The photodetector produces an electric signal indicative of the intensity of the detected light beam. The produced electric signal is supplied to an electric signal processing system which produces sampled values of the electric signal and reads the optically detectable pattern based on the sampled values.
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patent: 4845349 (1989-07-01), Cherry
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patent: 5115120 (1992-05-01), Eastman
patent: 5151580 (1992-09-01), Metlitsky et al.
patent: 5212371 (1993-05-01), Boles et al.
patent: 5231277 (1993-07-01), Aritake et al.
Inagaki, deceased Masahiro
Obata Kenzo
Look Edward K.
Lopez F. Daniel
Nippondenso Co. Ltd.
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