发明名称 |
Compact infrared lens arrangement including at least three reflections |
摘要 |
The invention relates to an infrared optical system which is capable of providing an effective focal length of about 240 mm, but fitting into a spherical package whose diameter is approximately 150 mm. To achieve such a degree of compactness, the invention employs an optical path including three reflections, which in combination define a question-mark-shaped optical path. Between the first and second reflections, the transmitted beam is passed through a focal plane and then is recollimated, and the collimated beam is then passed through the succeeding two reflections, after which it is directed telecentrically onto a detector. The invention further relates to a specific combination of lenses.
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申请公布号 |
US5024493(A) |
申请公布日期 |
1991.06.18 |
申请号 |
US19900569074 |
申请日期 |
1990.08.17 |
申请人 |
FANTOZZI, LOUIS R.;KESSLER, LAWRENCE |
发明人 |
FANTOZZI, LOUIS R.;KESSLER, LAWRENCE;DRAXLER, RICHARD |
分类号 |
G02B13/14;G02B17/02;G02B17/08 |
主分类号 |
G02B13/14 |
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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