Wide-angle objective lens apparatus
AssigneeHENSOLDT Optronics GmbH
InventorGokul Raju
Life of this patent
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Abstract
A wide-angle objective lens apparatus, for an infrared spectral range, which—includes a plurality of lens elements and an infrared detector device arranged in succession along an optical axis coaxially in the direction from an object side to an image side, and—is achromatic in the infrared spectral range, in particular from 3.5 μm to 5 μm, and/or is corrected for a chromatic aberration, and—is designed to be passively athermalized in a temperature range of −40° C. to 80° C., wherein—the lens elements and the infrared detector device are held in an optomechanical holding device and/or in a frame device which includes aluminum and/or is formed from aluminum.
Claims17
A wide-angle objective lens apparatus for an infrared spectral range, the wide-angle objective lens apparatus comprising:
- a plurality of lenses;
- and
- an infrared detection device located after the plurality of lenses coaxially along an optical axis in a direction from an object side to an image side, wherein the plurality of lenses and the infrared detection device are held in at least one of (i) an optomechanical holding device which comprises aluminium, and (ii) a frame device which comprises aluminium;
- wherein the wide-angle objective lens apparatus is at least one of (i) achromatic in the infrared spectral range, and (ii) corrected for a chromatic aberration in the infrared spectral range, and
- wherein the wide-angle objective lens apparatus is passively athermalized in a temperature range from −40° C. to 80° C.
Dependencies are inferred from the claim text.