Infrared sensing device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTakahiro Sono, Ryo Taniguchi, Sukoya Tawaratsumida
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Abstract
A meniscus lens has a dome shape and has a first surface facing a lens array and a second surface facing an infrared sensing element. The meniscus lens has a central portion and a peripheral portion. The central portion includes a top point that is an intersection between the optical axis of the meniscus lens and the first surface. The peripheral portion includes an end of the first surface of the meniscus lens. With respect to the central portion of the meniscus lens, an aplanatic point of the first surface is located at the focus of the lens array. With respect to the peripheral portion of the meniscus lens, an aplanatic point of the second surface is located at the focus of the lens array.
Claims20
An infrared sensing device comprising:
- an infrared sensing element;
- a lens array including multiple lenses, arranged to intersect with an optical axis of the infrared sensing element, and having a focus on the same side as the infrared sensing element;
- and
- a meniscus lens having a dome shape, the meniscus lens being arranged between the lens array and the infrared sensing element and having a first surface facing the lens array and a second surface facing the infrared sensing element,
- the meniscus lens having
- a central portion including:
- a top point that is an intersection between the optical axis of the meniscus lens and the first surface;
- and an intersection between the optical axis of the meniscus lens and the second surface;
- and
- a peripheral portion including an end of the first surface of the meniscus lens and an end of the second surface of the meniscus lens,
- an aplanatic point of the first surface being located, with respect to the central portion of the meniscus lens, at the focus of the lens array,
- an aplanatic point of the second surface being located, with respect to the peripheral portion of the meniscus lens, at the focus of the lens array.
Dependencies are inferred from the claim text.