MEASURING SYSTEM FOR DETERIORATION OF ELECTROPHOTOGRAPHIC SENSITIVE BODY AND ELECTROPHOTOGRAPHIC APPARATUS USING THE SYSTEM

摘要

PURPOSE: To non-destructively determine a service life of resolution (deterioration) of an electrophotographic sensitive body by measuring reflection absorbance from the sensitive body and comparing it with known absorbance. ;CONSTITUTION: Light from a light source 5 is transmitted via switching parts 3, 4 and a reference optic fiber 6 to a light amount measuring part 7. The measuring part 7 incorporates a spectrometer comprising an interference filter for measuring a reference light amount IR for each wavelength (350 to 700nm) and outputting it to a deterioration calculating part 1 for storage. Then light from the light source 5 is cast via the switching part 3 and a casting fiber 8 to a surface 10 of an electrophotographic sensitive body in a reflected light measuring part 9, the reflected light 11 is led to a measuring part 7 by a light receiving fiber 12 to measure a reflected light amount I'R, and reflection absorbance (IR-I'R)/IR×100 is calculated in the calculating part 1. This is compared with stored initial or normal reflection absorbance of the sensitive body 10, and a change corresponding to an ultraviolet visible absorption spectrum of a charge transfer material before and after electrolysis is recognized, thereby determining deterioration of the sensitive body 10.;COPYRIGHT: (C)1996,JPO