The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1998
Filed:
Sep. 09, 1996
Ichiro Bessho, Aichi-ken, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
This invention concerns an automatic exposure adjusting apparatus which permits infallible production of a signal corresponding exactly to the density of a given original document constantly even when the components of an optical system thereof cause any dispersion or gradual deterioration due to aging. First, the apparatus exposes a standard white subject copy 1 set on a document table 2 to the light of a preset standard amount of exposure, samples the reflected light from the copy 1 by a light detector 14, and adjusts to a proper magnitude the output value of an original document density signal emitted from a noninverting amplifier 33. Then, it exposes the standard density plate 3 to the light of an adjusted standard amount of exposure, samples the reflected light from the standard density plate 3 by the light detector 14, and readjusts to a proper magnitude the output value of an original document density signal issued from the noninverting amplifier 33. By this procedure, the apparatus is enabled to produce infallibly an original document of a proper density constantly.