PULSED SPECTROPOLARIMETER
    2.
    发明公开

    公开(公告)号:US20240142308A1

    公开(公告)日:2024-05-02

    申请号:US17979395

    申请日:2022-11-02

    Applicant: Roger Smith

    Inventor: Roger Smith

    CPC classification number: G01J4/04 G01J3/0224 G01J3/2823

    Abstract: This disclosure is directed to pulsed spectropolarimeters for conducting remote, non-perturbative measurements of the local magnetic field, density and temperature fields of a magnetized plasma medium. In one aspect, a pulsed spectropolarimeter includes a light source emitting a polarized light pulse having sufficiently narrow spatial extent at a prescribed wavelength and a light gathering optical system including a light gathering optic having an optic axis directed toward the medium and positioned to collect and collimate a predetermined solid angle of the scattered emission by the pulse in the backward direction, toward the source, while preserving the polarization state of the emission. A proportion of the emission is redirected to a spectrometer detector to determine the spectral distribution of the emission. A second optical collection and spectrometer system collects emission other than backscatter localized to the intersection of the pulse trajectory and the focus of this collection system.

    REDUCING POLARIZATION DEPENDENT LOSS (PDL) IN A GRATING-BASED OPTICAL SPECTRUM ANALYZER (OSA)

    公开(公告)号:US20240110831A1

    公开(公告)日:2024-04-04

    申请号:US18486355

    申请日:2023-10-13

    CPC classification number: G01J3/0224 G01J3/447

    Abstract: A system for a high resolution optical spectrum analyzer (OSA) using various optical configurations to reduce polarization dependent loss (PDL) is disclosed. The system may include a birefringent element to receive an input optical beam. The birefringent element may then split the optical beam into at least two exit beams. The system may also include an optical configuration comprising at least one optical element. The optical configuration may receive the at least two exit beams from the birefringent element and transform at least one of the two exit beams using the at least one optical element to provide two parallel beams with parallel polarizations. The optical configuration may then output the two parallel beams with parallel polarizations to a downstream optical element, such as a diffraction grating, or other optical element.

    SPECTROMETRY DEVICE AND SPECTROMETRY METHOD
    5.
    发明公开

    公开(公告)号:US20240110830A1

    公开(公告)日:2024-04-04

    申请号:US18275245

    申请日:2021-12-20

    Abstract: A spectrometry apparatus (1) according to an embodiment includes a detection object lens that signal light from a sample S enters, a slit (41) through which the signal light passes, a wavelength dispersive element that disperses the signal light having passed the slit (41) in accordance with a wavelength, an optical detector (50) that detects the signal light that has been subjected to wavelength dispersion in the wavelength dispersive element, scanning means for scanning a detection region of the optical detector (50) in the sample, a processing unit (51) that generates a spectral image, based on a detection signal of the optical detector (50), and an illumination optical system (10) that illuminates the sample from a side of the detection object lens.

    High-speed Fourier-transform spectroscopy apparatus and spectroscopy method

    公开(公告)号:US11892354B2

    公开(公告)日:2024-02-06

    申请号:US17140319

    申请日:2021-01-04

    Abstract: In a Fourier-transform spectroscopy apparatus, a scanning mirror is arranged on a light path of scanning light. The scanning mirror delays or advances the scanning light with respect to reference light according to the rotational angle of the scanning mirror from its initial position. A spectroscopic spectrum generating unit generates an interferogram based on the intensity of the detection target light obtained from the detection target, and Fourier transforms the interferogram thus generated. The spectroscopic spectrum generating unit corrects the nonlinearity of the group delay between an envelope of the reference light and an envelope of the scanning light, and corrects the nonlinearity of the phase shift between the respective envelopes.

    Reducing polarization dependent loss (PDL) in a grating-based optical spectrum analyzer (OSA)

    公开(公告)号:US11828648B2

    公开(公告)日:2023-11-28

    申请号:US17334132

    申请日:2021-05-28

    CPC classification number: G01J3/0224 G01J3/447

    Abstract: A system for a high resolution optical spectrum analyzer (OSA) using various optical configurations to reduce polarization dependent loss (PDL) is disclosed. The system may include a birefringent element to receive an input optical beam. The birefringent element may then split the optical beam into at least two exit beams. The system may also include an optical configuration comprising at least one optical element. The optical configuration may receive the at least two exit beams from the birefringent element and transform at least one of the two exit beams using the at least one optical element to provide two parallel beams with parallel polarizations. The optical configuration may then output the two parallel beams with parallel polarizations to a downstream optical element, such as a diffraction grating, or other optical element.

    LENS DEVICE, FILTER UNIT, AND IMAGING APPARATUS

    公开(公告)号:US20230341262A1

    公开(公告)日:2023-10-26

    申请号:US18341753

    申请日:2023-06-26

    Abstract: Provided are a lens device, a filter unit, and an imaging apparatus capable of suppressing occurrence of ghosts. The lens device includes a filter unit in an optical path. The filter unit has a plurality of opening portions including a first opening portion and a second opening portion. At least the first opening portion and the second opening portion each include a band-pass filter, and each include an optical element on at least one of an object side or an image side of the band-pass filter. The optical element is composed of a polarized light filter and a wave plate which converts linearly polarized light into circularly polarized light or elliptically polarized light. The first opening portion and the second opening portion pass light in different wavelength regions and different polarization directions.

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