发明名称 |
Focusing and projection screen |
摘要 |
An optica image forming screen which comprises a multiplicity of light-transmitting elements in a matrix of light-absorbing elements so that light incident upon the elements at an angle greater than a predetermined angle will be internally absorbed by the elements, with no significant reflection internal to the elements and with element size conducive to a scattering effect by using diffraction in the image space.
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申请公布号 |
US4121234(A) |
申请公布日期 |
1978.10.17 |
申请号 |
US19770784711 |
申请日期 |
1977.04.05 |
申请人 |
VIVITAR CORPORATION |
发明人 |
ALTMAN, RICHARD M.;MCLAUGHLIN, THOMAS D. |
分类号 |
G02B5/02;G03B13/24;(IPC1-7):G03B13/02;G03B19/12;G02B5/14 |
主分类号 |
G02B5/02 |
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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