公开(公告)号：US20240337534A1

公开(公告)日：2024-10-10

申请号：US18296818

申请日：2023-04-06

Applicant: Vector Atomic, Inc.

Inventor： Martin Machai BOYD ,  Micah Perry LEDBETTER ,  William Lunden ,  Guthrie Bran PARTRIDGE ,  Jonathan David ROSLUND ,  Daniel SHEREDY

IPC: G01J3/44 ,  G01J3/12 ,  G01J3/42 ,  G01J3/433 ,  G01J3/447

CPC classification number: G01J3/4406 ,  G01J3/4338 ,  G01J3/447 ,  G01J2003/1252 ,  G01J2003/423 ,  G01J2003/4334

Abstract: Embodiments herein describe various arrangements of an optical bench used to perform spectroscopy. For example, a spectroscopy system may include a pump optical signal and a probe optical signal that are transmitted through a vapor cell on the optical bench. The optical bench can further include one or more optical components (e.g., beam splitter and a thin film polarizer) for redirecting a portion of the probe and pump optical signals to photodiodes. In one embodiment, the measurements obtained from the photodiodes can be used to perform multiple tasks. For example, the measurements can be used to adjust the power of the optical signals in the optical bench (e.g., make DC power adjustments), perform amplitude modulation correction, and lock a laser frequency to a peak of an absorption spectrum of the vapor in the vapor cell.

公开(公告)号：US20240288309A1

公开(公告)日：2024-08-29

申请号：US18573375

申请日：2021-06-23

Applicant: Purdue Research Foundation

Inventor： Xueji Wang ,  Zubin Jacob

IPC: G01J4/04 ,  G01J3/02 ,  G01J3/28 ,  G01J3/447

CPC classification number: G01J4/04 ,  G01J3/0229 ,  G01J3/0237 ,  G01J3/2823 ,  G01J3/447 ,  G01J2003/2826

Abstract: A tunable hyperspectral-polarimetric filter system includes a first polarizer, a crystal filter and a second polarizer. The first polarizer is configured to transmit light in a first direction of linear polarization. The polarization selection may be substantially the same for all wavelengths at a spectral range of interest. The crystal filter, may be parallelly and coaxially disposed after the first polarizer. The crystal filter is configured to rotates the first direction of linear polarization for light transmitted by the first polarizer, wherein rotation angles differ for different wavelengths at the spectral range of interest. The second polarizer may be parallelly and coaxially disposed after the crystal filter. The second polarizer may substantially transmit a second direction of linear polarization of the light transmitted by the crystal filter. The first polarizer and/or the second polarizer are rotatable to tune for different transmission spectra for spectral and polarimetric imaging resolution.

公开(公告)号：US11867556B2

公开(公告)日：2024-01-09

申请号：US17486326

申请日：2021-09-27

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Seunghoon Han ,  Amir Arbabi ,  Andrei Faraon ,  Ehsan Arbabi

IPC: G01J3/02 ,  G01J3/28 ,  G01J3/447 ,  B82Y20/00

CPC classification number: G01J3/0208 ,  G01J3/0205 ,  G01J3/0224 ,  G01J3/0256 ,  G01J3/0259 ,  G01J3/2803 ,  G01J3/447 ,  B82Y20/00

Abstract: A spectrometer includes a transparent substrate including a first surface and a second surface that face each other and are substantially parallel to each other; a slit provided on the first surface and through which light is incident onto the transparent substrate; a spectrum optical system including metasurface including a plurality of nanostructures that are two-dimensionally arranged and satisfy a sub-wavelength scattering condition, wherein the metasurface includes a focusing metasurface which includes first nanostructures of the plurality of nanostructures, and is configured to reflect, disperse, and focus the light incident thereon through the slit, at different angles based on respective wavelengths; and a sensor configured to receive the light from the focusing metasurface. When L is a total length of an optical path from the slit to the sensor and D is a thickness of the transparent substrate, L and D satisfy the following inequality: L/D>3.

公开(公告)号：US11692877B2

公开(公告)日：2023-07-04

申请号：US17518761

申请日：2021-11-04

Applicant: Purdue Research Foundation

Inventor： Garth Jason Simpson ,  Chen Li ,  Changqin Ding

IPC: G01J3/44 ,  G01J3/447 ,  G01J3/02 ,  G01J3/427 ,  G01J3/12

CPC classification number: G01J3/447 ,  G01J3/021 ,  G01J2003/1291 ,  G01J2003/4275

Abstract: A method for phase contrasting-correlation spectroscopy: converting an incident linearly polarized light into two polarized components (polarized divergent and convergent components, wherein the polarized divergent component is orthogonal to the polarized convergent component), focusing each of the polarized divergent component and the polarized convergent component into a focal plane, thereby producing two focus planes constituting a reference focus (RF) plane and a sample focus (SF) plane; placing a sample at the SF plane and ambient conditions of the sample at the RF plane, resulting in a phase shift between the two polarized components; reconstituting the two phase-shifted polarized components into a phase-shifted linearly polarized light; detecting the phase-shifted linearly polarized light; calculating phase and intensity of the sample from the phase-shifted linearly polarized light; establishing an autocorrelation of phase and intensity of the phase-shifted linearly polarized light; and generating correlograms of intensity and phase of the phase-shifted linearly polarized light.

公开(公告)号：US11668645B2

公开(公告)日：2023-06-06

申请号：US15732179

申请日：2017-09-27

Applicant: BRUKER NANO, INC.

Inventor： Emad Zawaideh ,  Chris Claypool

IPC: G01N21/21 ,  G01N21/31 ,  G01J3/447 ,  G02B27/28 ,  G02B21/18 ,  G02B21/26

CPC classification number: G01N21/211 ,  G01J3/447 ,  G01N21/31 ,  G02B21/18 ,  G02B21/26 ,  G02B27/283 ,  G01N2021/213 ,  G01N2021/216 ,  G01N2201/0683

Abstract: A spectroscopic ellipsometry system and method for thin film measurement with high spatial resolution. The system includes a rotating compensator so that spectroscopic ellipsometric and imaging ellipsometric data are collected simultaneously with the same measurement beam. Collecting both ellipsometric data sets simultaneously increases the information content for analysis and affords a substantial increase in measurement performance.

公开(公告)号：US11607136B2

公开(公告)日：2023-03-21

申请号：US16650310

申请日：2018-07-24

Applicant: ChemImage Corporation

Inventor： Matthew Nelson ,  Thomas Voigt ,  Maxxwell Chatsko ,  Patrick Treado ,  Rebecca Schuler ,  Shona Stewart ,  James McGlone ,  Oksana Klueva ,  Nathaniel Gomer

IPC: A61B5/00 ,  A61B5/0205 ,  G01J3/02 ,  G01J3/26 ,  G01J3/447 ,  G01N21/31 ,  A61B5/026 ,  A61B5/08 ,  A61B5/103 ,  A61B5/1455 ,  A61B5/16

Abstract: Conformal vision with enhanced image processing of the outputted image is incorporated into novel applications. The conformal vision provides enhanced contrast by the combined inclusion of tunable filters and processing of the images that are generated by the detector. Furthermore, novel uses and applications of the conformal vision enable users to make determinations related to their health and wellness utilizing information provided by the conformal vision.

公开(公告)号：US20230063843A1

公开(公告)日：2023-03-02

申请号：US17796822

申请日：2021-02-01

Applicant: Photothermal Spectroscopy Corp.

Inventor： Craig Prater ,  Derek Decker ,  David Grigg

IPC: G01J3/10 ,  G01J3/447 ,  G01J3/02 ,  G01J3/453 ,  G01J3/28

Abstract: A system for infrared analysis over a wide field area of a sample is disclosed herein that relies on interference of non-diffractively separated beams of light containing image data corresponding to the sample, as well as a photothermal effect on the sample.

公开(公告)号：US20220381609A1

公开(公告)日：2022-12-01

申请号：US17334132

申请日：2021-05-28

Applicant: VIAVI SOLUTIONS INC.

Inventor： Driss TOUAHRI ,  Christopher Russell WAGNER ,  Joshua Benjamin Julius PHILIPSON

IPC: G01J3/02 ,  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.

公开(公告)号：US11293802B2

公开(公告)日：2022-04-05

申请号：US17127464

申请日：2020-12-18

Applicant: CHEMIMAGE CORPORATION

Inventor： Alyssa Zrimsek ,  Heather Gomer ,  Shawna Tazik

IPC: G01J3/02 ,  G01J3/457 ,  G01J3/447

Abstract: Techniques, devices and methods for discriminating a target from a background material without optimizing directly on the target are provided. The devices and methods can generate pass bands of single or multiple wavelengths of variable shape and intensity, and can also select and control the shape of the pass band profiles to improve the detection of targets of interest.

公开(公告)号：US11262241B2

公开(公告)日：2022-03-01

申请号：US16983578

申请日：2020-08-03

Applicant: The Government of the United States of America, as represented by the Secretary of the Navy

Inventor： Robert Furstenberg ,  Chris Kendziora ,  R. Andrew McGill

IPC: G01N21/00 ,  G01J3/28 ,  G01J3/10 ,  G01J3/433 ,  G01J3/447 ,  G01N21/17 ,  G01N21/47 ,  G01N21/63 ,  G01J3/02 ,  G01N21/39 ,  G02B27/48 ,  G01N21/45

Abstract: A photo-thermal speckle spectroscopy device having an infrared laser, a visible laser, a foam, and a camera. The infrared and visible lasers are focused on the foam, which causes the visible laser to scatter. A camera records the speckle pattern, which shifts when the IR laser is turned on. The related method of photo-thermal speckle spectroscopy is also disclosed.