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GLASSES FOR THE CORRECTION OF CHROMATIC AND THERMAL OPTICAL ABERATIONS FOR LENSES TRANSMITTING IN THE NEAR, MID, AND FAR-INFRARED SPECTRUMS
GLASSES FOR THE CORRECTION OF CHROMATIC AND THERMAL OPTICAL ABERATIONS FOR LENSES TRANSMITTING IN THE NEAR, MID, AND FAR-INFRARED SPECTRUMS
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机译:用于校正近,中,远红外光谱中传输的色度和热光学像差的眼镜
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摘要
The invention relates to chalcogenide glass compositions for use in a lens system to balance thermal effects and chromatic effects and thereby provide an achromatic and athermal optical element that efficiently maintains achromatic performance across a broad temperature range. The glass composition is based on sulfur compounded with germanium, arsenic and/or gallium, and may further comprise halides of, for example, silver, zinc, or alkali metals. Alternatively, is based on selenium compounded with gallium, and preferably germanium, and contains chlorides and/or bromides of, for example, zinc, lead or alkali metals.
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