Optical element for use in connection with radiation in the infrared portion of the electromagnetic spectrum and method of making same
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United States of America Patent
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Aug 9, 2005
Grant Date -
Feb 19, 2004
app pub date -
Dec 19, 2002
filing date -
Aug 14, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
An optical element, such as a lens, is described that provides good transmission of radiation in the infrared portion of the electromagnetic spectrum, that can be molded using an injection molding technique. The optical element comprises a moldable matrix in which is distributed a plurality of particles. The material comprising the matrix is selected so as to have a relatively low absorption of radiation in the infrared portion of the electromagnetic spectrum, and the material comprising the particles is selected to have a relatively high transmissivity of radiation in the infrared portion of the electromagnetic spectrum, and both materials are selected so as to have approximately the same index of refraction. The optical element comprising the matrix/particle composite is formed to provide surfaces having the contours that are required to provide the desired optical properties.
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