公开(公告)号：US3740144A

公开(公告)日：1973-06-19

申请号：US3740144D

申请日：1971-11-22

Applicant: WALKER W

Inventor： WALKER W

IPC: A01K43/00 ,  G01J3/433

CPC classification number: G01J3/433 ,  A01K43/00

Abstract: A system for detecting blood in eggs in which a beam of substantially monochromatic light or at least light within a very narrow wavelength band in the region of 578 nanometers (nm) is passed through an egg to be tested. The band is continually shifted in wavelength a number of times per second between substantially the shortest and the mid-length wavelengths of the broader blood absorption band, i.e. 578 to 573 nm. In a preferred embodiment, this is effected by a Fabry-Perot type interference filter placed in a light beam and oscillated about an axis by an electromagnetic device. A photoelectric device senses the light transmitted by the egg and the output signal derived therefrom is compared with an oscillating signal transmitted in time with the oscillation of the filter. If one phase relation exists between such signals, the egg is rejected as having blood present therein and if an opposite phase relation exists, the egg is retained as clear.

Abstract translation: 用于检测鸡蛋中的血液的系统，其中在578纳米（nm）区域内的基本单色光或至少在非常窄的波长带内的光通过待测试的蛋。 波段在更宽的血液吸收带的基本上最短和中长波长之间的波长上每秒持续移动多次，即578至573nm。 在一个优选实施例中，这是通过放置在光束中的法布里 - 珀罗型干涉滤光片实现的，并且通过电磁装置绕轴旋转。 光电装置感测由鸡蛋传播的光，并将从其产生的输出信号与在滤波器的振荡时间内传输的振荡信号进行比较。 如果这种信号之间存在一个相位关系，则蛋被拒绝，因为存在血液，如果存在相反的相位关系，则保持鸡蛋清澈。

公开(公告)号：US3012467A

公开(公告)日：1961-12-12

申请号：US66783357

申请日：1957-06-25

Applicant: SERVO CORP OF AMERICA

Inventor： ROSENTHAL ADOLPH H

IPC: G01J1/42 ,  G01J3/00 ,  G01J3/12 ,  G01J3/433 ,  G01J3/457

CPC classification number: G01J3/1256 ,  G01J3/0213 ,  G01J3/0264 ,  G01J3/433 ,  G01J3/457 ,  G01J2001/4242

公开(公告)号：US11953434B2

公开(公告)日：2024-04-09

申请号：US17432665

申请日：2020-02-21

Applicant: The Trustees of Princeton University

Inventor： Mark Zondlo ,  Lei Tao ,  Da Pan ,  Josh Collins ,  Paul Guiguizian ,  Howard Y. Bell ,  Alice Margaret Sophie Elliott ,  Patrick Minter Killough ,  Bernardus Maria Geertshuis ,  Herie Javier Soto

IPC: G01N21/39 ,  G01J3/42 ,  G01J3/433 ,  G01N21/27 ,  G01N21/31 ,  G01N21/552

CPC classification number: G01N21/39 ,  G01J3/42 ,  G01J3/433 ,  G01N21/274 ,  G01N21/552 ,  G01N2021/3129

Abstract: Disclosed is a spectroscopic device, system, and method for measuring the concentration of one or more molecular species of interest in a gas, liquid or solid sample, where the device may be portable, may be commercially manufactured, and/or may be adapted to existing systems and/or integrated with new systems to provide optical gas sensing for such systems. The disclosed devices, systems, and methods can be particularly useful in monitoring the purity of, e.g., a certain gas species, including determining whether a gas mixture contains certain gas species above a set concentration limit.

公开(公告)号：US11796392B2

公开(公告)日：2023-10-24

申请号：US18063213

申请日：2022-12-08

Applicant: IRsweep AG

Inventor： Stéphane Schilt ,  Pierre Brochard ,  Kenichi Komagata ,  Giulio Terrasanta ,  Andreas Hugi

IPC: G01J3/433 ,  G01J3/10 ,  H01S5/40 ,  H01S5/062 ,  G01J3/42

CPC classification number: G01J3/433 ,  G01J3/10 ,  H01S5/0623 ,  H01S5/4006 ,  G01J2003/102 ,  G01J2003/423 ,  G01J2003/4332

Abstract: A dual-comb spectrometer comprising two lasers outputting respective frequency combs having a frequency offset between their intermode beat frequencies. One laser acts as a master and the other as a follower. Although the master laser is driven nominally with a DC drive signal, the current on its drive input line nevertheless oscillates with an AC component that follows the beating of the intermode comb lines lasing in the driven master laser. This effect is exploited by tapping off this AC component and mixing it with a reference frequency to provide the required frequency offset, the mixed signal then being supplied to the follower laser as the AC component of its drive signal. The respective frequency combs in the optical domain are thus phase-locked relative to each other in one degree of freedom, so that the electrical signals obtained by multi-heterodyning the two optical signals are frequency stabilized.

公开(公告)号：US11733096B2

公开(公告)日：2023-08-22

申请号：US17352327

申请日：2021-06-20

Applicant: Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences

Inventor： Leiran Wang ,  Qibing Sun ,  Lei Shi ,  Wenfu Zhang

IPC: G01J3/433 ,  G01J3/02 ,  G01J3/10 ,  G02F1/35 ,  G02F1/355 ,  G01N21/3504 ,  G01J3/42

CPC classification number: G01J3/433 ,  G01J3/0229 ,  G01J3/108 ,  G01N21/3504 ,  G02F1/3536 ,  G02F1/3551 ,  G01J2003/423 ,  G01J2003/4334 ,  G02F2202/20 ,  G02F2203/11 ,  G02F2203/56

Abstract: An ultrahigh-resolution mid-infrared (MIR) dual-comb spectroscopy (DCS) measurement device includes a pump unit, a microring resonator (MRR) unit, a modulation unit, a splitting unit, a testing unit, a signal detection unit, a power balance unit, a reference detection unit and a spectral analysis unit. The measurement method includes: adjusting the laser emitted by the pump unit to the MRR unit; adjusting the modulation unit and performing dual-frequency modulation; generating two sets of MIR optical frequency combs (OFCs) with different repetition rates and splitting the MIR OFCs into the test light and the reference light; performing photoelectric conversion on the test light and injecting the test light to the spectral analysis unit; performing photoelectric conversion on the reference light and injecting the reference light to the spectral analysis unit; and performing Fourier transformation and data processing on test results to obtain absorption spectrum of the to-be-tested sample.

公开(公告)号：US20190250038A1

公开(公告)日：2019-08-15

申请号：US16279181

申请日：2019-02-19

Applicant: Massachusetts Institute of Technology

Inventor： Thomas H. Jeys ,  William D. Herzog ,  Brian G. Saar ,  Alexander M. Stolyarov ,  Ryan Sullenberger ,  David Crompton ,  Shawn Michael Redmond

IPC: G01J3/433 ,  G01J3/447 ,  G01J3/28 ,  G01N21/17 ,  G01J3/10 ,  G01N21/63

CPC classification number: G01J3/433 ,  G01J3/108 ,  G01J3/2823 ,  G01J3/447 ,  G01N21/1717 ,  G01N21/636 ,  G01N2021/1725

Abstract: A device, and corresponding method, can include a pump light source configured to irradiate a target specimen. The device can also include a sensor configured to observe a probe speckle pattern based on light from a probe light source reflected from the target specimen. The device further may include a correlator configured to determine a material property of the target specimen by analyzing changes in images of the probe speckle pattern as a function of the irradiation with the pump light source. Advantages of the device and method can include much higher sensitivity than existing methods; the ability to use visible probe wavelengths for uncooled, low-cost visible detectors with high spatial resolution; and the ability to obtain target material properties without detecting infrared light.

公开(公告)号：US20180328851A1

公开(公告)日：2018-11-15

申请号：US15705748

申请日：2017-09-15

Applicant: Electronics and Telecommunications Research Institute ,  Korea Advanced Institute of Science and Technology

Inventor： Won Kyoung LEE ,  Ki-Hun JEONG ,  Moonseong PARK

IPC: G01N21/65 ,  G01N21/64

CPC classification number: G01N21/658 ,  G01J3/433 ,  G01J3/44 ,  G01J2001/4242 ,  G01J2003/4424 ,  G01N21/274 ,  G01N21/6428 ,  G01N2201/06113 ,  G01N2201/067 ,  G01N2201/121

Abstract: Disclosed is an apparatus and method for processing a bio optical signal based on a spread spectrum scheme including a demodulator configured to collect a bio optical signal generated in response to an incident beam modulated based on a spreading code being scattered from a target analyte, and remove a noise from the bio optical signal by demodulating the bio optical signal based on the spreading code, wherein the bio optical signal has a correlation with the modulated incident beam.

公开(公告)号：US20180283950A1

公开(公告)日：2018-10-04

申请号：US15941510

申请日：2018-03-30

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Nien-Hui Ge ,  Yuan Feng ,  Ilya Vinogradov

IPC: G01J3/45 ,  G01J3/02

CPC classification number: G01J3/45 ,  G01J3/027 ,  G01J3/433 ,  G01J9/04

Abstract: A heterodyne optical spectroscopy system comprises a light source that acts as a local oscillator (LO); a beam splitting component that generates a reference beam from the LO; a signal component that generates a sample signal from a sample; a beam blocker that can turn off the sample signal to generate blank shots; a composite signal detection subsystem that detects a heterodyned signal that is a mix of the sample signal and a portion of the LO; a composite reference detection subsystem synchronized to the signal detection subsystem to detect a portion of the reference beam; and a processor that processes digital signals from the signal detection subsystem and the reference detection subsystem. A very versatile reference scheme is developed to treat different heterodyne spectroscopies in a unified way, which achieves optimal noise suppression.

公开(公告)号：US20180209899A1

公开(公告)日：2018-07-26

申请号：US15874956

申请日：2018-01-19

Applicant: Hong Kong Applied Science and Technology Research Institute Company Limited

Inventor： Jiaqi WANG ,  Chun ZHANG ,  Wei Mong TSANG

IPC: G01N21/27 ,  G01N21/25

CPC classification number: G01N21/255 ,  G01J3/0286 ,  G01J3/12 ,  G01J3/433 ,  G01J2003/1265 ,  G01N21/359

Abstract: A derivative spectroscopy system for achieving a tunable resolution of 2 nm or less in resolving spectral components of an input optical signal is provided so as to estimate derivative spectra of the input optical signal based on the resolved spectral components. In the system, a first dispersive-element structure spectrally decomposes the input optical signal into subband signals. A second dispersive-element structure receives part or all of the subband signals and spectrally decomposes the received subband signals to plural spectral components. A material having a temperature-variant refractive index is used to build the second dispersive-element structure, enabling a shift of center wavelength of each spectral component as small as 2 nm of less upon changing a temperature of the second dispersive-element structure. By obtaining three spectral-component sets obtained at three different predetermined temperatures with the center-wavelength shift of 2 nm or less, first- and second-order derivative spectra are obtained with good accuracy.

公开(公告)号：US09903808B2

公开(公告)日：2018-02-27

申请号：US14590218

申请日：2015-01-06

Applicant: NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： David F. Plusquellic ,  David A. Long ,  Kevin O. Douglass ,  Joseph T. Hodges ,  Adam J. Fleisher

IPC: G01B9/02 ,  G01J3/45 ,  H01S3/00 ,  G02F1/01 ,  G01N21/25 ,  G01J3/433 ,  G01J3/453 ,  G01N21/39

CPC classification number: G01N21/255 ,  G01J3/433 ,  G01J3/453 ,  G01N21/39 ,  G01N2021/399 ,  G02F1/01 ,  G02F2203/56 ,  H01S3/0057

Abstract: A comb source includes a continuous wave frequency source to provide a continuous wave radiation; a first modulator in optical communication with the continuous wave frequency source; a second modulator in optical communication with continuous wave frequency source; and a waveform driver in electrical communication with the first modulator and the second modulator. A process for producing an analyte spectrum includes producing a first comb from a continuous wave frequency and a first waveform; producing a reference comb and a probe comb from the first comb; subjecting a sample to the probe comb; producing a sample comb in response to subjecting the sample to the probe comb; producing a composite comb from the reference comb and the sample comb; producing a second comb from the continuous wave frequency and a second waveform; and combining the second comb and the composite comb to produce the analyte spectrum.