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US 12,474,556 B2Granted
Lightweight modified-Schmidt corrector lens
AssigneeRaytheon Company
InventorRavash Joshua Eliassi
Life of this patent
Estimating the term…
Abstract
A modified-Schmidt corrector lens including a first side having a curved surface configured to direct electromagnetic radiation, and a second side having a stepped surface including one or more stepped zones positioned to maintain a substantially constant thickness along a radius of the corrector lens.
Claims22
A modified-Schmidt corrector lens comprising:
- a first side having a curved surface configured to direct electromagnetic radiation;
- and
- a second side having a stepped surface including a plurality of stepped zones,
- wherein the corrector lens has a substantially constant thickness between the curved surface of the first side and stepped surface of the second side along a radius of the corrector lens.
1 more element
An optical imaging system comprising:
- an imaging detector located at a focal plane of the optical imaging system, the imaging detector being responsive to electromagnetic radiation;
- a field lens coupled to the imaging detector and configured to focus the electromagnetic radiation onto the imaging detector;
- and
- a modified-Schmidt corrector lens including a first side having a curved surface configured to direct the electromagnetic radiation and a second side having a stepped surface including a plurality of stepped zones,
- wherein the corrector lens has a substantially constant thickness between the curved surface of the first side and stepped surface of the second side along a radius of the corrector lens.
2 more elements
Dependencies are inferred from the claim text.