Optics: measuring and testing – Photometers
Reexamination Certificate
2009-09-22
2011-10-18
Nguyen, Tu (Department: 2886)
Optics: measuring and testing
Photometers
Reexamination Certificate
active
08040501
ABSTRACT:
An image forming apparatus includes a carrier, a forming device forming a mark on the carrier, a sensor, a determiner, a changer, an evaluator and a controller. The sensor includes a light emitting device that emits light toward the carrier and the light receiving device that receives light reflected from the carrier or the mark and outputs a light reception signal corresponding to the received light quantity. The determiner determines a position of the mark based on the light reception signal. The changer changes sensor sensitivity by changing a quantity of light from the light emitting device or sensitivity of the light receiving device. The evaluator obtains the light reception signals multiple times and evaluates a degree of closeness between an average level of the light reception signals and a target level. The controller controls the changer to change the sensor sensitivity of the sensor according to an evaluation result.
REFERENCES:
patent: 5499079 (1996-03-01), Kinoshita et al.
patent: 5512986 (1996-04-01), Toyomura et al.
patent: 6510297 (2003-01-01), Kawai et al.
patent: 6633734 (2003-10-01), Maebashi et al.
patent: 2008/0124114 (2008-05-01), Yamagata et al.
patent: 6-175452 (1994-06-01), None
patent: 11-102111 (1999-04-01), None
patent: 2001-092195 (2001-04-01), None
patent: 2002-236402 (2002-08-01), None
patent: 2003-057908 (2003-02-01), None
patent: 2003-098795 (2003-04-01), None
patent: 2006-276739 (2006-10-01), None
patent: 2006-284663 (2006-10-01), None
patent: 2007-121414 (2007-05-01), None
patent: 2008-009021 (2008-01-01), None
patent: 2008-134333 (2008-06-01), None
JP Office Action dtd Sep. 14, 2010, JP Appln. 2008-251831, English translation.
Banner & Witcoff Ltd
Brother Kogyo Kabushiki Kaisha
Nguyen Tu
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