Photocopying – Projection printing and copying cameras – Reflector between original and photo-sensitive paper
Patent
1976-07-15
1978-04-18
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Reflector between original and photo-sensitive paper
355 8, G03B 2770, G03G 1528
Patent
active
040849040
ABSTRACT:
A slit-scanning type optical copying apparatus, wherein successive increments of the surface of an original are scanned by reciprocating an original-carrying support or an original-image scanning mirror, so that an original image is focused on a photosensitive member moving or turning at a given speed or at a given R.P.M. in a given direction, through a projecting optical system including an objective lens. In this optical copying apparatus, the projecting optical system comprises: a single objective lens; a roof reflecting member having adjoining reflecting surfaces making a right angle therebetween, the aforesaid reflecting member being positioned in the rear of the objective lens; a single half-mirror positioned in the optical path in the front of the objective lens and oriented to direct projecting beams from the original onto the lens and to direct projecting beams from the lens onto the photosensitive member, respectively; and means for turning the reflecting member through an angle of 90.degree. in response to the advancing and returning movements of the original carrying support or original-image scanning mirror.
REFERENCES:
patent: 2940358 (1960-06-01), Rosenthal
patent: 3052155 (1962-09-01), Hurin et al.
patent: 3493299 (1970-02-01), Hazelton
patent: 3498713 (1970-03-01), Schlegel et al.
patent: 3574459 (1971-04-01), Hartwig et al.
patent: 3992093 (1976-11-01), Jakobson
I.B.M. Technical Disclosure Bulletin, H. Medley Electrophotographic Copier, vol. 9 No. 11, 4/1967, p. 1522.
Griffin Donald A.
Minolta Camera Kabushiki Kaisha
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