Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-01-14
1995-06-20
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
359205, 359212, G02B 2610
Patent
active
054262984
ABSTRACT:
In an optical scanner, an optical deflector has a deflecting reflecting face rotated at an equal speed. A light beam from a light source is deflected on a plane by the deflector at an equal angular velocity and is incident to a reflective image-forming element through a half mirror inclined with respect to a beam deflecting face. The light beam reflected on the reflective image-forming element is reflected on the half mirror and is converged by an image-forming action of the reflective image-forming element as a light spot on a scanned face to perform an optical scanning operation. The reflective image-forming element has a function for substantially performing the optical scanning operation using the light spot at an equal speed. The reflective image-forming element is arranged such that the reflective image-forming element is shifted by a predetermined shifting amount in a direction perpendicular to the beam deflecting face to correct the curve of a scanning line on the scanned face. Other optical scanners are also shown.
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Atsuumi Hiromichi
Endou Osamu
Itabashi Akihisa
Sakuma Nobuo
Lee John R.
Nelms David C.
Ricoh & Company, Ltd.
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