Optical scanning apparatus including an image reading section an

Details Optical scanning apparatus including an image reading section an Optical scanning apparatus including an image reading section an

1996-06-18

1998-09-08

Wong, Peter S.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358474, 358481, 347241, 399 5, 399118, H04N 104, G03G 1500

Patent

active

058052968

ABSTRACT:
An optical scanning apparatus includes a semiconductor laser, a polygonal mirror as a deflector for scanning a light beam from the laser, a photosensitive drum for forming an electrostatic latent image, a converging lens for converging the light beam from the laser onto the photosensitive drum, and a reflection mirror located between the deflector and the photosensitive drum. The reflection mirror is adapted to reflect the light beam so that a light beam reflected by the reflection mirror is used to read a source document placed at a position that is the conjugate of the position of the photosensitive drum surface with respect to the converging device. Inside the casing of the semiconductor laser are a beam splitter for light path separation and a photosensor. The apparatus has an image reader section and a laser printer section, which share a common optical system, thus providing a compact design and cost reduction and also equalizes the accuracy of image reading and printing.

REFERENCES:
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patent: 4374617 (1983-02-01), Fisli
patent: 4575214 (1986-03-01), Carley
patent: 5017961 (1991-05-01), Hasegawa et al.
patent: 5122817 (1992-06-01), Hasegawa et al.
patent: 5377291 (1994-12-01), Hatakoshi et al.
patent: 5596424 (1997-01-01), Iizuka et al.
Optics, Chapter 10 "Diffraction", Eugene Hecht, pp. 424-427, undated.

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