Optical system with two-stage aberration correction
AssigneeRaytheon Company
InventorChungte W. Chen
Life of this patent
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Abstract
An optical system includes a two-stage aberration corrector having a static corrector lying on the optical path and a dynamic corrector lying on the optical path. The static corrector is fixed and is selected to correct the fixed aberration component of an optical beam. The dynamic corrector is controllably variable to correct the variable, angle-dependent aberration component of the beam. The dynamic corrector includes an astigmatism generator, a power generator, and a coma generator. The optical system also includes a window through which the optical path passes prior to reaching the aberration corrector, and a sensor in the optical path after the beam passes through the aberration corrector.
Claims21
An optical system having an optical path along which a beam travels, the optical system comprising:
- a window lying on the optical path, the window introducing an aberration wavefront distortion into the beam;
- and
- an aberration corrector, including
- a static corrector lying on the optical path, the static corrector introducing a fixed counter-distortion into the beam, and
- a dynamic corrector lying on the optical path, the dynamic corrector being controllably variable to correct aberration in the beam, wherein the dynamic corrector comprises an astigmatism generator, a power generator, and a coma generator.
An optical system having an optical path along which a beam travels, the optical system comprising:
- an aberration corrector, including
- a static corrector lying on the optical path, and
- a dynamic corrector lying on the optical path, the dynamic corrector being controllably variable to correct aberration in the beam, the dynamic corrector comprising
- an astigmatism generator,
- a power generator, and
- a coma generator.
An optical system having an optical path along which a beam travels, the optical system comprising:
- an aberration corrector, including
- a static corrector lying on the optical path, the static corrector comprising at least one lens, and
- a dynamic corrector lying on the optical path, the dynamic corrector being controllably variable to correct aberration in the beam, the dynamic corrector comprising
- a first lens having
- a first lens surface, and
- a cylindrical second lens surface,
- a second lens having
- a cylindrical first lens surface in facing-but-spaced-apart relation to the cylindrical second lens surface of the first lens, and
- a spherical or aspherical second lens surface,
- a third lens having
- a spherical or aspherical first lens surface in facing-but-spaced-apart relation to the spherical or aspherical second lens surface of the second lens, and
- a second lens surface,
- a fourth lens having
- a first lens surface in facing-but-spaced-apart relation to the second lens surface of the third lens, and
- a third-order aspheric second lens surface,
- a fifth lens having
- a third-order aspheric first lens surface in facing-but-spaced-apart relation to the second lens surface of the fourth lens, and
- a second lens surface,
- an astigmatism-correcting linear drive operable to change the spacing between the first lens and the second lens,
- a focus-correcting linear drive operable to change the spacing between the second lens and the third lens,
- an astigmatism-correcting rotational drive operable to rotate the first lens, the second lens, and the third lens as a group about the optical path,
- a coma-correcting linear drive operable to move at least one of the fourth lens and the fifth lens in a direction perpendicular to the optical path, and
- a coma-correcting rotational drive operable to rotate the fourth lens and the fifth lens relative to each other about the optical path.
Dependencies are inferred from the claim text.