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公开(公告)号：US20190017868A1
公开(公告)日：2019-01-17
申请号：US15646624
申请日：2017-07-11
Inventor： Mark L Oskotsky , Michael J Russo, JR.
CPC classification number: G01J3/0208 , G01J3/0256 , G01J3/04 , G01J3/18 , G01J2003/1852 , G02B17/0856
Abstract: A Compact and Athermal VNIR/SWIR Spectrometer utilizes a slit, a Mangin lens, a pupil lens adjacent to the diffraction grating, corrector lenses, a beam splitter, field lenses and SWIR and VNIR FPAs. In examples, two corrector lenses are used. Some examples do not utilize field lenses and beam splitter, some examples utilize only the SWIR radiation spectrum. By balancing the powers of the optical elements and Abbe numbers of glasses as well as usage of aspheric surfaces combinations, a monochromatic and polychromatic aberrational correction is achieved; by balancing optical elements refractive indices change with temperature an athermalization is achieved. The overall length of the spectrometer does not exceed 4 inches, and in some examples it is 2.5 inches. A wide field of view and a low F number are obtained with an operating wavelength range from approximately 400 to 2350 nm. The spectrometer is particularly suited to airborne applications.
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公开(公告)号：US10859798B2
公开(公告)日：2020-12-08
申请号：US16123520
申请日：2018-09-06
Inventor： Mark L Oskotsky , Daniel Engheben , Vincent Lipari , Michael J Russo, Jr.
Abstract: An F-theta lens provides more than 88 degrees FFOV, F #2.8 or less, length not more than 200 mm, and/or 2.5 μm or better resolution, with color correction from 450 nm to 650 nm. The lens includes three optical groups having positive, negative, and positive optical powers respectively, which can include four, four, and six elements, respectively. Embodiments include an aperture stop in the center of the second optical group. Refractive indices and ray heights are selected to correct for field curvature. Embodiments further include a CMOS detector having pixel pitch of 1.25 microns or less, density of 18 megapixels or more, focal plane diameter of 57.2 mm or more, Nyquist sampling of 400 lines per mm or more and wide pixel field of view of 30° or more. A plurality of CMOS detectors can be arrayed to create a mosaic image.
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公开(公告)号：US10782509B2
公开(公告)日：2020-09-22
申请号：US16131845
申请日：2018-09-14
Inventor： Mark L Oskotsky , Michael J Russo, Jr. , Daniel Engheben , Erik L Hugel , Shawn C Reven , Vincent Lipari , Jerry Ma , Yueli Zhang
Abstract: An orthoscopic, apochromatic lens is suitable for deployment such as on aerial platforms provides distortion less than 0.2% over a full field of view of more than 60° with F # less than 6.5 and focal length greater than 3″, and in embodiments greater than 5″. Embodiments are apochromatic from 500 to 950 nm to within 7 microns. Embodiments have an overall length of less than 7″. The lens includes five optical groups with an aperture stop between the second and third groups. The optical groups have one, one, two, one and one optical element each, as ordered from the object to the image plane, and have positive, negative, positive, positive, and negative optical powers, respectively. Embodiments are telephoto. In embodiments the focal length is temperature invariant within 0.0015 inches from 0° C. to 40° C.
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公开(公告)号：US10345144B2
公开(公告)日：2019-07-09
申请号：US15646624
申请日：2017-07-11
Inventor： Mark L Oskotsky , Michael J Russo, Jr.
Abstract: A Compact and Athermal VNIR/SWIR Spectrometer utilizes a slit, a Mangin lens, a pupil lens adjacent to the diffraction grating, corrector lenses, a beam splitter, field lenses and SWIR and VNIR FPAs. In examples, two corrector lenses are used. Some examples do not utilize field lenses and beam splitter, some examples utilize only the SWIR radiation spectrum. By balancing the powers of the optical elements and Abbe numbers of glasses as well as usage of aspheric surfaces combinations, a monochromatic and polychromatic aberrational correction is achieved; by balancing optical elements refractive indices change with temperature an athermalization is achieved. The overall length of the spectrometer does not exceed 4 inches, and in some examples it is 2.5 inches. A wide field of view and a low F number are obtained with an operating wavelength range from approximately 400 to 2350 nm. The spectrometer is particularly suited to airborne applications.
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