Compensating optical measurements of toner concentration for...

Details Compensating optical measurements of toner concentration for... Compensating optical measurements of toner concentration for...

2005-09-06

2005-09-06

Beatty, Robert (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

Reexamination Certificate

active

06941084

ABSTRACT:
A method for sensing toner concentration in a developer housing with an optical system containing developer material including toner and carrier, the method, including: emitting light with the optical system through a viewing window in the developer housing onto developer material in the housing; sensing the light reflected off the developer material with the optical system; calculating a toner concentration measurement based upon the sensed light reflected off the developer material; and compensating the toner concentration measurement to account for optical variation due to the developer material condition.

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Copending U.S. Appl. No. 10/607,212, filed concurrently herewith, entitled “LED Color Specific Optical Toner Concentration Sensor,” by R. Enrique Viturro et al.

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