发明名称 |
AUXILIARY LIGHT PROJECTING APPARATUS FOR A FOCUS DETECTING SYSTEM |
摘要 |
An auxiliary light source for a passive focus detector, such as would be used for automatic focusing. A projection lens is inclined with respect to the imaging lens and projects a patterned image from a surface inclined with respect to the projection lens. preferably the patterned image is projected to lie along the axis of the imaging lens so that a sharp illumination pattern is formed at all distances along that axis. Preferably the pattern is such that a higher intensity portion is imaged at a far distance and a lower intensity portion is imaged at a near distance.
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申请公布号 |
CA1281576(C) |
申请公布日期 |
1991.03.19 |
申请号 |
CA19870532929 |
申请日期 |
1987.03.25 |
申请人 |
TEJIMA, YASUYUKI;SUGAWARA, SABURO;YUDA, HIDEAKI |
发明人 |
TEJIMA, YASUYUKI;SUGAWARA, SABURO;YUDA, HIDEAKI |
分类号 |
G02B7/28;G01C3/08;G02B7/09;G03B3/00;G03B13/36;(IPC1-7):G02B7/09 |
主分类号 |
G02B7/28 |
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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