Level detector

Details Level detector Level detector

2008-03-04

2008-03-04

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140AG, C250S2140AG

Reexamination Certificate

active

07339154

ABSTRACT:
A level detector includes a light receiving element unit having a plurality of light receiving elements; a first amplifier circuit configured to amplify a light receiving signal; a first gain switching circuit; a first peak hold circuit; an arithmetic control device configured to analyze a light receiving position of the position detection unit; a second amplifier circuit; and a second gain switching circuit configured to switch and set a gain of the second amplifier circuit, the arithmetic control device analyzes the light receiving position of laser light received by the position detection unit, based on a signal output from the second amplifier circuit.

REFERENCES:
patent: 5177560 (1993-01-01), Stimple et al.
patent: 5347120 (1994-09-01), Decker et al.
patent: 5381131 (1995-01-01), Mochizuki et al.
patent: 5457310 (1995-10-01), Fournier
patent: 5923427 (1999-07-01), Dong
patent: 5952883 (1999-09-01), Masuta
patent: 6462326 (2002-10-01), Cleaver
patent: 6927628 (2005-08-01), Oshima et al.
patent: 7265626 (2007-09-01), Teo et al.
patent: 2004-309440 (2004-11-01), None

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