Scanning optical apparatus, image forming apparatus and method for manufacturing a scanning lens

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United States of America Patent

PATENT NO 9372431
APP PUB NO 20150248076A1
SERIAL NO

14632127

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Abstract

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In a scanning optical apparatus including a light source, a light deflector having a reflecting surface, and a single scanning lens, a light flux deflected in a main scanning direction is focused on an image surface. The reflecting and image surfaces are conjugate to each other with respect to a sub scanning direction, Bmax×Bmin>0, and Dmax×Dmin<0 where Bmax and Bmin are a maximum value and a minimum value, respectively, of paraxial focal points, Dmax and Dmin are a maximum value and a minimum value, respectively, of midpoints of focal depth in the sub scanning plane, the values being determined with reference to the image surface, wherein the value of the image surface is 0 and the values on a farther-from-the-scanning-lens side behind the image surface have positive values.

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Patent Owner(s)

  • BROTHER KOGYO KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujino, Hitoshi Tajimi, JP 41 445
Hoshino, Hidetaka Aichi, JP 19 70
Nakamura, Yoshifumi Ama, JP 93 1186
Ominato, Hiroyuki Nagoya, JP 12 65

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