Dual field-of-view objects system for the infrared
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United States of America Patent
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Jul 23, 2002
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N/A
app pub date -
Nov 30, 2000
filing date -
May 8, 1998
priority date (Note) -
Expired
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Abstract
A dual field-of-view objective system (40) which is inexpensive, has high transmission and is essentially achromatized and athermalized. The system (40) uses a silicon front lens A and all lens elements have positive temperature/refractive index change coefficient.
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