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公开(公告)号：US20230258848A1
公开(公告)日：2023-08-17
申请号：US18091221
申请日：2022-12-29
Applicant: California Institute of Technology
Inventor： Taeyoon JEON , Axel SCHERER , Jack JEWELL
CPC classification number: G02B5/0875 , G02B1/113 , G02B5/0883
Abstract: An optical-thin-film structure comprises a low-index optical thin film consisting essentially of co-deposited Barium Fluoride and a secondary fluoride compound, and a high-index optical thin film.
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Patent Agency Ranking
公开(公告)号：US20180340826A1
公开(公告)日：2018-11-29
申请号：US15990114
申请日：2018-05-25
Applicant: California Institute of Technology
Inventor： Axel SCHERER , Taeyoon JEON
Abstract: A Fabry-Perot cavity-based spectral notch filter is disclosed, where the filter is operative for providing an output optical signal whose spectral content is spatially dispersed along at least one direction, while also controlling the spectral position and spectral range of the output light. In some embodiments, the spectral filter is integrated with a detector arrays to realize a compact, high-resolution spectrometer that can rapidly acquire the absorption spectrum of a sample with high sensitivity.
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公开(公告)号：US20240377279A1
公开(公告)日：2024-11-14
申请号：US18660616
申请日：2024-05-10
Applicant: California Institute of Technology
Inventor： Axel SCHERER , Taeyoon JEON , Changsoon CHOI , Peter A PETILLO , Jack JEWELL , John Richard ORDONEZ-VARELA
Abstract: A leak-detection system comprises networked imaging packages including an infrared camera based on microbolometer arrays, one or more filters, and a processor. The processor uses one or more novel processing methods for identifying gas leakages in a monitored facility. In some embodiments, the imaging packages are installed at various locations in the monitored facility. In some other embodiments, the leak-detection system is embodied as a mobile platform, wherein the networked imaging packages are coupled to drones that fly throughout the monitored facility to monitor for gas leakages. The flight path of the cameras may be pre-programmed and may further be alterable in real time. The novel processing technique(s) employed by the leak-detection system disclosed herein involve the use of multiple unique filters that facilitate enhancing the signal-to-noise ratio of captured images; that is, enhancing the contrast of a monitored gas against other objects. The novel processing techniques include one or more of the following: (i) two-image subtraction; (ii) time-resolved imaging; and (iii) multi-filter detection. Additionally, in some embodiments, the imaging packages include a visible (light) camera in addition to an IR camera.
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公开(公告)号：US20220170793A1
公开(公告)日：2022-06-02
申请号：US17675575
申请日：2022-02-18
Applicant: California Institute of Technology
Inventor： Axel SCHERER , Taeyoon JEON
Abstract: An infrared spectrometer for operation in the mid-infrared spectral range is presented, where the spectrometer includes a Bragg-mirror-based spectral filter that is operative for providing an interrogation signal whose spectral content is dispersed along a first direction at a filter aperture. The filter aperture is imaged through a sample by a thermal-imaging camera to create a focused image that is based on the interrogation signal and the absorption characteristics of the sample. As a result, embodiments in accordance with the present disclosure can be smaller, less complex, and less expensive than infrared spectrometers known in the prior art.
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公开(公告)号：US20210373208A1
公开(公告)日：2021-12-02
申请号：US17335946
申请日：2021-06-01
Applicant: California Institute of Technology
Inventor： Axel SCHERER , Taeyoon JEON
Abstract: The teachings of the present disclosure enable a reduction of the refractive index of a material by incorporating an additive selected from air, vacuum, or an inert gas in the material to turn the material into a material foam that is suitable for use in optical systems. A material foam in accordance with the present disclosure is characterized by a porosity that reduces its refractive index from that of the same material as found in nature. The higher porosity also decreases the density of the material from that of the same material as found in nature. Material foams in accordance with the present disclosure are suitable for use in the low-refractive-index layers of a Bragg mirror.
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公开(公告)号：US20200249091A1
公开(公告)日：2020-08-06
申请号：US16782674
申请日：2020-02-05
Applicant: California Institute of Technology
Inventor： Axel SCHERER , Taeyoon JEON
Abstract: An infrared spectrometer for operation in the mid-infrared spectral range is presented, where the spectrometer includes a Bragg-mirror-based spectral filter that is operative for providing an interrogation signal whose spectral content is dispersed along a first direction at a filter aperture. The filter aperture is imaged through a sample by a thermal-imaging camera to create a focused image that is based on the interrogation signal and the absorption characteristics of the sample. As a result, embodiments in accordance with the present disclosure can be smaller, less complex, and less expensive than infrared spectrometers known in the prior art.
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