Image forming apparatus having photo sensors capable of...

Details Image forming apparatus having photo sensors capable of... Image forming apparatus having photo sensors capable of...

2006-07-26

2009-11-17

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S551000

Reexamination Certificate

active

07619205

ABSTRACT:
A photo sensor of the invention includes a photo coupler having a light emitting element and a light receiving element arranged and disposed to be spaced from each other by a specified interval, and a prism capable of being coupled to the photo coupler, having an optical path to guide a light from the light emitting element to the light receiving element, and provided with a slit in the optical path, through which an object to be detected can pass, plural prisms different in width of the slit are provided, and the plural prisms and the photo couplers are combined to enable detection of objects to be detected which are different in detection distance. The photo sensor can be used for an image forming apparatus or the like.

REFERENCES:
patent: 5381167 (1995-01-01), Fujii et al.
patent: 6995356 (2006-02-01), Chong et al.
patent: 06-104479 (1994-04-01), None
patent: 2000-285278 (2000-10-01), None

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