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公开(公告)号：US20240410823A1
公开(公告)日：2024-12-12
申请号：US18207936
申请日：2023-06-09
Applicant: Nikira Labs Inc.
Inventor： John Brian Leen , Manish Gupta , Rupal Gupta
IPC: G01N21/31
Abstract: A cell for an optical cavity includes a tube with a first open-end and a second open-end, a first end-cap, and a second end-cap. The first end-cap is fixedly attached to the tube at the first open-end and has an opening with a center axis. The second end-cap is fixedly attached to the tube at the second open-end and has an opening with a center axis that is axially aligned with the center axis of the first end-cap.
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2.发明申请公开(公告)号：US20220244172A1
公开(公告)日：2022-08-04
申请号：US17166661
申请日：2021-02-03
Applicant: Nikira Labs Inc.
Inventor： Manish Gupta , Rupal Gupta
Abstract: An optical system for performing an absorption measurement of a medium sample includes a laser source configured to output a laser beam having a wavelength corresponding to an absorption region of interest; a ringdown cavity comprising a chamber configured to receive the medium sample, an input mirror at an input end, an output mirror at an output end, and an optical axis that extends through the centers of the input mirror and the output mirror; a coupling device configured to couple the laser beam through the input mirror into the chamber; and a detector optically coupled with the cavity, and configured to detect an intensity of light of the wavelength corresponding to the absorption region of interest that extends through the output mirror, wherein a cavity geometry of the cavity increases the re-entrant condition of the cavity relative to a conventional cavity comprised of two spherical mirrors.
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公开(公告)号：US20240410755A1
公开(公告)日：2024-12-12
申请号：US18370809
申请日：2023-09-20
Applicant: Nikira Labs Inc.
Inventor： John Brian Leen , Manish Gupta , Rupal Gupta
Abstract: An optical cavity includes a cell having at least one structure with a first end and a second end, a first end-cap configured to removably receive a first mirror, and a second end-cap configured to removably receive a second mirror. The first end-cap is attached to the structure at the first end and has an opening with a center axis. The second end-cap is attached to the structure at the second end and has an opening with a center axis that is axially aligned with the center axis of the first end-cap. The cell can be a closed cell, wherein the structure is a tube axially aligned with the center axis. The cell can be an open cell, wherein the structure is a tube that includes one or more openings through its wall. The cell can be an open cell, wherein the structure includes one or more rods, each off axis from the center axis.
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Patent Agency Ranking
公开(公告)号：US20250164393A1
公开(公告)日：2025-05-22
申请号：US18511780
申请日：2023-11-16
Applicant: Nikira Labs Inc.
Inventor： David P. Morgan , Manish Gupta
Abstract: A system for measuring optical extinction includes an optical cell having an optical cavity, a sampling fan, a duct system having an interior, and a controller. The sampling fan is associated with a sample outlet of the optical cell, while the interior of the duct system is in fluid communication with an optical cavity of the optical cell through a sample inlet of the optical cell. The duct system includes an unfiltered inlet and a filtered inlet with a filter and an inline duct fan arranged to draw a sample from a sample source and force the sample through the filter into the interior of the duct system. The controller is configured to cycle the inline duct fan on and off while the sampling fan is continuously on to thereby cycle filtered samples and unfiltered samples through the optical cavity. Continuous operation of the sampling fan provides the same airflow conditions, e.g., flow rate and flow path, through the optical cavity for both the filtered samples and the unfiltered samples.
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5.发明授权公开(公告)号：US11592389B2
公开(公告)日：2023-02-28
申请号：US17166661
申请日：2021-02-03
Applicant: Nikira Labs Inc.
Inventor： Manish Gupta , Rupal Gupta
Abstract: An optical system for performing an absorption measurement of a medium sample includes a laser source configured to output a laser beam having a wavelength corresponding to an absorption region of interest; a ringdown cavity comprising a chamber configured to receive the medium sample, an input mirror at an input end, an output mirror at an output end, and an optical axis that extends through the centers of the input mirror and the output mirror; a coupling device configured to couple the laser beam through the input mirror into the chamber; and a detector optically coupled with the cavity, and configured to detect an intensity of light of the wavelength corresponding to the absorption region of interest that extends through the output mirror, wherein a cavity geometry of the cavity increases the re-entrant condition of the cavity relative to a conventional cavity comprised of two spherical mirrors.
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公开(公告)号：US20250093259A1
公开(公告)日：2025-03-20
申请号：US18817594
申请日：2024-08-28
Applicant: Nikira Labs Inc.
Inventor： Manish Gupta , John Brian Leen , Rupal Gupta , Nabil Saad , Andrew P. Chan
Abstract: A method of measuring a quantity or characteristic of a qualified air, e.g., clean air or prefiltered air, present in an environment, e.g., a chamber or a cleanroom, includes freely placing a measurement apparatus with an open multipass cell in the environment, and allowing a qualified air, such as clean air or prefiltered air, present in the environment to move freely into and out of an optical cavity of the open multipass cell. The method further includes obtaining a measurement of a quantity or a characteristic based on the qualified air in the optical cavity.
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7.发明授权公开(公告)号：US11892399B2
公开(公告)日：2024-02-06
申请号：US18101448
申请日：2023-01-25
Applicant: Nikira Labs Inc.
Inventor： Manish Gupta , Rupal Gupta
CPC classification number: G01N21/31 , G02B5/10 , G02B27/30 , G01N2201/0231 , G01N2201/0633 , G01N2201/0636 , G01N2201/06113
Abstract: An optical system for performing an absorption measurement of a medium sample includes a laser source configured to output a laser beam having a wavelength corresponding to an absorption region of interest; a ringdown cavity comprising a chamber configured to receive the medium sample, an input mirror at an input end, an output mirror at an output end, and an optical axis that extends through the centers of the input mirror and the output mirror; a coupling device configured to couple the laser beam through the input mirror into the chamber; and a detector optically coupled with the cavity, and configured to detect an intensity of light of the wavelength corresponding to the absorption region of interest that extends through the output mirror, wherein a cavity geometry of the cavity increases the re-entrant condition of the cavity relative to a conventional cavity comprised of two spherical mirrors.
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8.发明公开公开(公告)号：US20230168187A1
公开(公告)日：2023-06-01
申请号：US18101448
申请日：2023-01-25
Applicant: Nikira Labs Inc.
Inventor： Manish Gupta , Rupal Gupta
CPC classification number: G01N21/31 , G02B5/10 , G02B27/30 , G01N2201/0231 , G01N2201/06113 , G01N2201/0633 , G01N2201/0636
Abstract: An optical system for performing an absorption measurement of a medium sample includes a laser source configured to output a laser beam having a wavelength corresponding to an absorption region of interest; a ringdown cavity comprising a chamber configured to receive the medium sample, an input mirror at an input end, an output mirror at an output end, and an optical axis that extends through the centers of the input mirror and the output mirror; a coupling device configured to couple the laser beam through the input mirror into the chamber; and a detector optically coupled with the cavity, and configured to detect an intensity of light of the wavelength corresponding to the absorption region of interest that extends through the output mirror, wherein a cavity geometry of the cavity increases the re-entrant condition of the cavity relative to a conventional cavity comprised of two spherical mirrors.
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