发明名称 |
Light beam scanning apparatus |
摘要 |
A light-beam scanning apparatus for conducting a light scanning on a scanning surface (304) by diffracting an incident light from a light source (310) by means of a diffraction grating of a rotatable hologram (302), and diffracting, by means of a fixed plate (303), the diffracted light to be used in a scanning conducted by a rotation of said rotatable hologram (302); the light-beam scanning apparatus being characterized in that the rate of variation of a direction cosine of an object wave determined in a scanning direction of said fixed plate (303) is configured to be different from a rate of variation of a direction cosine of the object wave determined in a cross scanning direction, and focal distances of a light incident on said rotatable hologram (302) are configured to be different in the scanning direction and the cross scanning direction. <IMAGE> |
申请公布号 |
EP1111428(B1) |
申请公布日期 |
2005.12.14 |
申请号 |
EP20010105460 |
申请日期 |
1992.03.26 |
申请人 |
FUJITSU LIMITED |
发明人 |
HASEGAWA, SHINYA;KAYASHIMA, SHIGEO;MAEDA, SATOSHI;IWATA, SHIGETAKE;YAMAGISHI, FUMIO;NAKASHIMA, MASATO;ARITAKE, HIROKAZU;HOKARI, MAMORU |
分类号 |
G02B5/32;G02B26/10;G03H1/12 |
主分类号 |
G02B5/32 |
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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