Infrared optical system and infrared imaging apparatus
AssigneeSony Corporation
InventorsMasahiro Saito, Hidetoshi Kabasawa
Life of this patent
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Abstract
An infrared optical system includes: a first optical element, a second optical element, a third optical element, and a fourth optical element arranged along a direction from an object side toward an image plane side, wherein the fourth optical element has positive refracting power, an aperture is provided between the second optical element and the third optical element, the first and fourth optical elements are made of any one of silicon (Si), chalcogenide glass, and zinc sulfide (ZnS), and the second and third optical elements are made of a resin material, and at least one of a surface facing the object and a surface facing the image plane of each of the second and third optical elements is an aspheric surface.
Claims17
An infrared optical system comprising:
- a first optical element, a second optical element, a third optical element, and a fourth optical element arranged along a direction from an object side toward an image plane side,
- wherein the fourth optical element has positive refracting power,
- an aperture is provided between the second optical element and the third optical element,
- the first and fourth optical elements are made of any one of silicon (Si), chalcogenide glass, and zinc sulfide (ZnS), and
- the second and third optical elements are made of a resin material, and at least one of a surface facing the object and a surface facing the image plane of each of the second and third optical elements is an aspheric surface.
An infrared imaging apparatus comprising:
- an infrared optical system including a first optical element, a second optical element, a third optical element, and a fourth optical element arranged along a direction from an object side toward an image plane side, the fourth optical element having positive refracting power, an aperture provided between the second optical element and the third optical element, the first and fourth optical elements made of any one of silicon (Si), chalcogenide glass, and zinc sulfide (ZnS), and the second and third optical elements are made of a resin material, at least one of a surface facing the object and a surface facing the image plane of each of the second and third optical elements being an aspheric surface;
- an infrared detection unit that detects infrared light collected through the infrared optical system;
- and
- an image signal acquisition unit that produces an infrared image signal based on an infrared detection signal provided from the infrared detection unit.
Dependencies are inferred from the claim text.