发明名称 |
System and method for measuring accuracy of focus |
摘要 |
A reliable and repeatable accuracy of focus measurement device to measure the focus accuracy of cameras that employ a different light path between the lens and the focusing sensor and between the lens and the film or image sensor. The measurement device includes a frame having a substantially planar front face with a focusing target located thereon, and at least one depth-of-field ruler coupled to the frame with a transverse axis falling within a front face plane and a long axis that is angularly adjustable with respect to the front face plane. |
申请公布号 |
US8139138(B1) |
申请公布日期 |
2012.03.20 |
申请号 |
US20080333204 |
申请日期 |
2008.12.11 |
申请人 |
TAPES MICHAEL;GALBURT PAUL;PICTUREFLOW LLC |
发明人 |
TAPES MICHAEL;GALBURT PAUL |
分类号 |
G03B13/00 |
主分类号 |
G03B13/00 |
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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