Compact achromatic and passive optically-only athermalized telephoto lens
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United States of America Patent
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Jan 23, 2018
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app pub date -
Jun 27, 2014
filing date -
Jun 27, 2013
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Abstract
The disclosure relates to infrared achromatic and athermalized narrow-field arrangements without any mechanical compensation mechanism realized by a single convergent front lens and a single divergent correcting lens. The long back focal length allows for cooled and uncooled detectors, different detector sizes, wavebands, and housing materials. A high resolution is achieved with fast f-numbers below f/2.0.
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