发明名称 |
Optical device, optical scanning apparatus and image forming apparatus |
摘要 |
An optical device includes at least one surface emitting laser device having a dielectric film for causing a central portion of a light emitting region to have a comparatively higher reflectivity than a peripheral portion; a light receiving element disposed, with respect to a first direction, on one side to the surface emitting laser device; and a transparent member disposed in a path of light emitted from the surface emitting laser device and configured to reflect a portion of the light toward the light receiving element as monitoring light. The central portion has shape anisotropy in which a width measured on a line extending in the first direction and passing through the center of the light emitting region is smaller than a width measured on a line extending in a second direction, which is perpendicular to the first direction, and passing through the center of the light emitting region.
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申请公布号 |
US8446446(B2) |
申请公布日期 |
2013.05.21 |
申请号 |
US201113084969 |
申请日期 |
2011.04.12 |
申请人 |
HOSHI FUMIKAZU;ISHII TOSHIHIRO;RICOH COMPANY, LTD. |
发明人 |
HOSHI FUMIKAZU;ISHII TOSHIHIRO |
分类号 |
B41J2/45 |
主分类号 |
B41J2/45 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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