发明名称 |
Linear shutter and method to achieve uniform density of image elements of a 3-D photograph |
摘要 |
A method and apparatus for achieving uniform density of image elements of a 3-D photograph by using a 3-D printer with a linear motion blade shutter which travels at varying speeds during printing a negative view to control the duration of exposure across the 3-D photograph. The scanning speed of the linear shutter is varied during the exposure of each of the 2-D negative views and is based upon the position of the 2-D negative view in relation to the field of illumination of the enlarging lens in order to compensate for the non-uniformity of illumination due to the vignetting effect.
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申请公布号 |
US5019855(A) |
申请公布日期 |
1991.05.28 |
申请号 |
US19890395498 |
申请日期 |
1989.08.17 |
申请人 |
IMAGE TECHNOLOGY, INC. |
发明人 |
LAM, NICHOLAS L. |
分类号 |
G03B35/24;G02B3/00;G03B27/32;G03B35/04 |
主分类号 |
G03B35/24 |
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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