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US 8,553,331 B2Granted
Selective diffractive optical element and a system including the same
AssigneeFLIR Systems, Inc.
InventorsJared Stack, Alan Kathman
Life of this patent
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Abstract
A selective diffractive optical element includes a first diffractive region having a first design on a first surface of a substrate, and a second diffractive region having a second design on the first surface of the substrate, the first and second designs being different, wherein, by altering a position of a cross-section of an illumination beam, the selective diffractive optical element outputs a desired proportion of the two diffractive patterns aligned along an optical axis of the illumination beam.
Claims24
A selective diffractive optical element, comprising:
- a first diffractive region on a first surface of a substrate, the first diffractive region having a first design;
- and a second diffractive region, separate from the first diffractive region and on the first surface of the substrate, the second diffractive region having a second design, the first and second designs being different, but complementary respective to a desired balanced output of the selective diffractive optical element, wherein, by altering a position of a cross-section of an illumination beam, the selective diffractive optical element outputs a beam having a desired proportion of the first and second diffractive regions aligned along an optical axis of the illumination beam, the desired proportion being realized from a combination of the first and second diffractive regions and, when the position of the cross-section of the illumination beam is in a predetermined region including both the first and second diffractive regions, the output beam is balanced.
An optical system, comprising:
- a light source adapted to output an illumination beam;
- and a selective diffractive optical element adapted to receive the illumination beam, the selective diffractive optical element including:
- a first diffractive region on a first surface of a substrate, the first diffractive region having a first design;
- and a second diffractive region, separate from the first diffractive region and on the first surface of the substrate, the second diffractive region having a second design, the first and second designs being different, but complementary respective to a balanced output of the selective diffractive optical element, wherein, by altering a position of a cross-section of an illumination beam, the selective diffractive optical element outputs a beam having a desired proportion of the first and second diffractive regions aligned along an optical axis of the illumination beam, the desired proportion being realized from a combination of the first and second diffractive regions and, when the position of the cross-section of the illumination beam is in a predetermined region including both the first and second diffractive regions, the output beam is balanced.
1 more element
Dependencies are inferred from the claim text.