Lens assembly for long-life laser imaging system

Details Lens assembly for long-life laser imaging system Lens assembly for long-life laser imaging system

1988-12-02

1990-09-04

Arnold, Bruce Y.

350433, G02B 2610, G02B 306

Patent

active

049539272

ABSTRACT:
A system for imaging a line comprises a laser for emitting a modulated laser-light beam, an image-receiving surface, and a reflective element between the laser and the surface for deflecting the beam in an x-direction of the line to be imaged onto the surface. A lens assembly including a cylinder lens is provided between the laser and the element for focussing the beam on the element and a telescopic lens system is provided between the reflective element and the surface and including an upstream lens spaced by its focal length downstream from the reflective element and a downstream lens focussed downstream. Another simple cylinder lens is provided between the upstream and downstream lenses having a refractive power perpendicular to the x-direction. A projecting lens between the downstream lens and the image surface receives the beam from the downstream lens and focusses it on the surface. The middle lens has a refractive power perpendicular to the beam traversing it.

REFERENCES:
patent: 4054360 (1977-10-01), Oosaka et al.
patent: 4281889 (1981-08-01), Noguchi
Laser-Optical System of the IBM 3800 Printer by J. M. Fleischer IBM Journal of Research Developments, vol. 21, No. 5, Sep. 1977, pp. 479-483.

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