Return optical deflecting element, optical deflecting element an

Details Return optical deflecting element, optical deflecting element an Return optical deflecting element, optical deflecting element an

1991-08-02

1992-12-08

Howell, Janice A.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359216, 359217, G02B 2717

Patent

active

051702789

ABSTRACT:
Reflecting faces constituting one or more reflecting face pairs are respectively inclined at 45 degrees with respect to the rotational axis of an optical deflecting element. The reflecting faces are opposed to each other such that these reflecting faces are perpendicular to each other. The reflecting face pairs are arranged with axial symmetry with respect to the rotational axis. A light beam is incident to one of the reflecting faces in parallel to the rotational axis. This light beam is sequentially reflected on this one reflecting face and the other reflecting face constituting the reflecting face pairs together with this one reflecting face. Then, the light beam is returned from the other reflecting face in parallel to the rotational axis and is emitted as a deflected light beam. An optical scanner using the return optical deflecting element and an optical deflecting element is also shown. The optical scanner may have a light source device, a deflector, a member for reflecting a light beam from the deflector in a predetermined direction, etc.

REFERENCES:
patent: 3907197 (1975-09-01), Poschi et al.
patent: 4154507 (1979-05-01), Barr
patent: 4344666 (1982-08-01), Birgmeir et al.
patent: 4690554 (1987-09-01), Froelich

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