Lens device

Details Lens device Lens device

1990-11-27

1992-05-05

Ben, Loha

Optical: systems and elements

Lens

With support

359820, 359216, G02B 702

Patent

active

051113406

ABSTRACT:
Laser light emitted from a light source is deflected in a predetermined direction by a rotary polygonal mirror to scan the surface of a photosensitive medium. A correction lens corrects the focal point of the laser light deflected by the rotary polygonal mirror. The correction lens is formed by cutting a circular lens along a plane off the optical axis thereof and removing a segment of shorter arc therefrom. The correction lens is held by a lens holder by way of being pressed by a pressing member both in the radial direction and in the direction of the optical axis thereof to the lens holder.

REFERENCES:
patent: 3904276 (1975-09-01), Whitaker et al.
patent: 4303306 (1981-12-01), Ookawa
patent: 4733945 (1988-03-01), Bacich
patent: 4762395 (1988-08-01), Gordon et al.
patent: 4850674 (1989-07-01), Hasselskog
patent: 4854671 (1989-08-01), Hanke et al.

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