Optical object identifying device and printing apparatus

Details Optical object identifying device and printing apparatus Optical object identifying device and printing apparatus

2006-09-19

2006-09-19

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C356S237300

Reexamination Certificate

active

07109507

ABSTRACT:
An optical object identifying device has a light-emitting device, a first photodetector and a second photodetector. In the optical object identifying device, an angle of 10 to 30 degrees is formed between the optical axis of the light-emitting device and the surface of the sheet to be identified. Also, an angle of 10 to 30 degrees is formed between the optical axis of the first photodetector and the surface of the sheet. Further, an angle of approximately 90 degrees is formed between the optical axis of the second photodetector and the surface of the sheet. Thus, the light-emitting device, the first photodetector and the second photodetector are arranged in the optimum positions, so that the first photodetector and the second photodetector can obtain two output values varied with each of many types of sheets.

REFERENCES:
patent: 5004929 (1991-04-01), Kakinoki
patent: RE33991 (1992-07-01), Shiba
patent: 6566673 (2003-05-01), Swan
patent: 6914684 (2005-07-01), Bolash
patent: 10-198174 (1998-07-01), None
patent: 2001-180843 (2001-07-01), None

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