发明名称 |
Lens changeable image scanner and lens position control device in the same |
摘要 |
PCT No. PCT/JP94/00027 Sec. 371 Date Sep. 12, 1994 Sec. 102(e) Date Sep. 12, 1994 PCT Filed Jan. 12, 1994 PCT Pub. No. WO94/16518 PCT Pub. Date Jul. 21, 1994.In an image scanner, a lens position control mechanism and method converts a reading line density by changing over lenses. A base rotatable in a plane parallel to an original table is provided, and the lenses are supported on the base so that their optical axes are in a plane parallel to the base surface and intersect each other at a pivot. A proper kind of lens can be arranged at a proper position by controlling the rotation of the base in such a manner that a reference pattern is provided at a position at which it is readable by an image receiving element through the lens and a lens existing in an optical path is judged on the basis of a received image of the reference pattern to confirm the position of the lens. Thereby, an image scanner capable of changing over lenses at a high precision can be obtained without increasing the height of the image scanner.
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申请公布号 |
US5535040(A) |
申请公布日期 |
1996.07.09 |
申请号 |
US19940295912 |
申请日期 |
1994.09.12 |
申请人 |
OHTSUKA, TADAO;SHODA, MASAO |
发明人 |
OHTSUKA, TADAO;SHODA, MASAO |
分类号 |
H04N1/028;H04N1/04;H04N1/10;H04N1/193;(IPC1-7):G02B26/08;G03B27/52 |
主分类号 |
H04N1/028 |
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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