Circular arc illumination apparatus

Details Circular arc illumination apparatus Circular arc illumination apparatus

1993-06-02

1995-02-14

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359 63, 359221, 359226, 250236, G02B 2608

Patent

active

053900448

ABSTRACT:
A circular arc illumination apparatus includes a light source device, a condensing optical system for condensing rays emitted by the light source device, and a scanning optical system for transmitting the rays to an object to be scanned. The scanning optical system includes a driving device, a rotating mirror driven by the driving device, an angular velocity detecting device for detecting an angular velocity of the rotating mirror, a controller for controlling the driving device based on an angular velocity of the rotating mirror detected by the angular velocity detecting device so as to vary the angular velocity in one time scanning, and a circular arc-shaped bending mirror for reflecting scanning rays reflected by the rotating mirror to the object. The axis of the bending mirror is coincident with a rotary axis of the rotating mirror.

REFERENCES:
patent: 4186991 (1980-02-01), Koide et al.
patent: 4538181 (1985-08-01), Taylor

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