发明名称 |
MEMORY TYPE IMAGE INFORMATION READER |
摘要 |
PURPOSE:To reduce curvature of field on a memory type fluorescent sheet and to read image information accurately by using a cylindrical mirror instead of a cylindrical lens. CONSTITUTION:A light beam 2 which is reflected and deflecsted by a rotary polygon mirror 5 as a deflector is made incident on the cylindrical mirror 7 through an ftheta lens 6. This mirror 7 reflects the light beam 2 passed through the lens 6 upon the memory type fluorescent material sheet 8 and converges it of the sheet only in a subscanning direction. The sum of the distance (a) from the lens 6 to the mirror 7 and the distance (b) from the mirror 7 to the sheet 8 is equal to the focal length f6 of the lens 6. Therefore, the light beam 2 is converged on the sheet 8 regardless of whether the polygon mirror 5 has surfaces slanted or not. Consequently, the curvature of field on the sheet 8 is reduced and image information is read accurately. |
申请公布号 |
JPS6184619(A) |
申请公布日期 |
1986.04.30 |
申请号 |
JP19840206519 |
申请日期 |
1984.10.02 |
申请人 |
FUJI PHOTO FILM CO LTD |
发明人 |
NOGUCHI MASARU;ISHIKAWA HIROMI |
分类号 |
G02B26/12;G02B26/10;G03B42/02;H04N1/04;H04N1/113 |
主分类号 |
G02B26/12 |
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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