Image density detecting unit for image formation apparatus

Details Image density detecting unit for image formation apparatus Image density detecting unit for image formation apparatus

1982-10-20

1985-10-01

Hix, L. T.

Photocopying

Including fiber optics

355142, 355 38, 355 57, 355 68, 250216, 250228, 350174, 350630, G03G 2700, G03G 2734, G03G 2774, G03G 1500

Patent

active

045442584

ABSTRACT:
The invention provides an image density detecting unit for an image formation apparatus, which is made of a transparent optical medium, which has a reflecting plate whose section is substantially a quadric surface, and which has a focusing unit for focusing, by means of the reflecting plate, light incident on the transparent optical medium at a predetermined position inside the transparent optical medium.

REFERENCES:
patent: 3217170 (1965-11-01), Bin-Lun Ho
patent: 3549254 (1970-12-01), Muir
patent: 3914049 (1975-10-01), Basu et al.
patent: 4118622 (1978-10-01), David
patent: 4200391 (1980-04-01), Sakamoto et al.
patent: 4314283 (1982-02-01), Kramer

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