Scanning apparatus

Details Scanning apparatus Scanning apparatus

1980-04-02

1982-03-23

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358285, 358206, H04N 110

Patent

active

043216285

ABSTRACT:
An arrangement for optically reducing range finder effect in scanning systems employing plural image scanning arrays or a flying spot scanning beam. In the former, to reduce visually observable artifacts at the point where crossover is made from one adjoining array to the next due to misalignments of the scanning system components, field lenses are disposed between the system projection lenses and the document supporting platen. The field lenses serve to bend the imaging rays to a direction more nearly normal to the platen to thereby increase the depth of focus. Where the scanning system comprises a flying spot beam, a spherical mirror is disposed in the optical path to direct the imaging ray along an axis more nearly normal to the platen.

REFERENCES:
patent: 3241438 (1966-03-01), Frank
patent: 3655284 (1972-04-01), Agliata
patent: 3886309 (1975-05-01), Mason
patent: 3898627 (1975-08-01), Hooker et al.
patent: 4114037 (1978-09-01), Westwood
patent: 4135815 (1979-01-01), Masunaga
patent: 4149090 (1979-04-01), Agulnek
patent: 4168900 (1979-09-01), Adachi
W. S. Smith, "The Telecentric Stop" Modern Optical Engr., McGraw-Hill, p. 131.
Nippon Sheet Glass Co. "Selfoc Linear Lens Array", 6-13-78.

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