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公开(公告)号：US3927944A
公开(公告)日：1975-12-23
申请号：US42573273
申请日：1973-12-18
Applicant: SHIMADZU CORP
Inventor： IWAHASHI KENJI , YAMAMOTO HIROSHI
CPC classification number: G01J3/427
Abstract: A double-beam spectrophotometer which can be used for dual-wavelength measurement and provide two substantially equivalent beams and a third beam of a different wavelength which advances along the same path as one of the two beams and alternately therewith. The optical elements employed are so arranged that the beams have a sharply defined, very narrow cross sectional area at the chopper having a number of chopping teeth so that the chopping speed can be increased without decreasing the efficiency in the use of the energy of the output signal of the detector. The cells may be placed at different places most suitable for measurement depending upon the kind and/or concentration of the sample to be measured.
Abstract translation: 一种双光束分光光度计，其可用于双波长测量，并提供两个基本相等的光束和不同波长的第三光束，其沿与两个光束之一交替的相同路径前进。 采用的光学元件被布置成使得光束在切割器处具有清晰限定的非常窄的横截面积，其具有多个切割齿，使得可以增加斩波速度而不降低使用输出能量的效率 检测器的信号。 细胞可以放置在最适合于测量的不同地方，这取决于待测样品的种类和/或浓度。
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公开(公告)号：US3563658A
公开(公告)日：1971-02-16
申请号：US3563658D
申请日：1965-10-22
Applicant: PHILIPS CORP
Inventor： DREYFUS MARC GEORGE
CPC classification number: G01N33/0027 , G01J3/427 , G01N21/314
Abstract: IN A SPECTROARDIOMETER PARTICULARLY ADAPTED TO DETERMINE THE OCCURRENCE OF ATMOSPHERIC CONTAMINANTS, MEANS ARE PROVIDED TO PRODUCE SIGNALS THAT ARE PORPORTIONAL TO THE SUM AND DIFFERENCE BETWEEN THE DIFFERENCE OF ATMOSPHERIC AND REFERENCE RADIATION INTENSITY AT TWO CLOSELY SPACED WAVELENGTHS. THE SUM AND DIFFERENCE SIGNALS CAN BE DIRECTLY PRODUCED BY PROPER DESIGN OF THE SPECTRO-
RADIOMETER CHOPPER. WHILE REDUCTION OF THERMAL EFFECTS IS REDUCED BY THIS SYSTEM, STILL FURTHER REDUCTION CAN BE OBTAINED BY EMPLOYING A FILTER HAVING A THERMALLY RESPONSIVE TRANSMITTANCE IN THE SPECTRORADIOMETER.-
公开(公告)号：US3218914A
公开(公告)日：1965-11-23
申请号：US10072161
申请日：1961-04-04
Applicant: DOW CHEMICAL CO
Inventor： BARTZ ARNOLD M , HERSCHER LEONARD W
IPC: G01J3/427
CPC classification number: G01J3/427
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公开(公告)号：US2900510A
公开(公告)日：1959-08-18
申请号：US54373355
申请日：1955-10-31
Applicant: PHILLIPS PETROLEUM CO
Inventor： SPARKS JR MARSHALL S
CPC classification number: G01J1/44 , G01J1/16 , G01J3/427 , G01J2001/4453 , G01J2003/1217 , G01J2003/126 , G01N21/33
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Patent Agency Ranking
公开(公告)号：US11740126B2
公开(公告)日：2023-08-29
申请号：US17351067
申请日：2021-06-17
Applicant: Apple Inc.
Inventor： Trent D. Ridder , Mark Alan Arbore , Gary Shambat , Robert Chen , David I. Simon , Miikka M. Kangas
CPC classification number: G01J3/427 , G01J3/06 , G01J3/10 , G01J3/108 , G01J3/2803 , G01J3/2846 , G01J3/42 , G01N21/25 , G01N21/35
Abstract: Methods and systems for measuring one or more properties of a sample are disclosed. The methods and systems can include multiplexing measurements of signals associated with a plurality of wavelengths without adding any signal independent noise and without increasing the total measurement time. One or more levels of encoding, where, in some examples, a level of encoding can be nested within one or more other levels of encoding. Multiplexing can include wavelength, position, and detector state multiplexing. In some examples, SNR can be enhanced by grouping together one or more signals based on one or more properties including, but not limited to, signal intensity, drift properties, optical power detected, wavelength, location within one or more components, material properties of the light sources, and electrical power. In some examples, the system can be configured for optimizing the conditions of each group individually based on the properties of a given group.
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公开(公告)号：US20230236112A1
公开(公告)日：2023-07-27
申请号：US18162385
申请日：2023-01-31
Applicant: Photothermal Spectroscopy Corp
Inventor： Craig Prater , Kevin Kjoller , Roshan Shetty
CPC classification number: G01N21/171 , G01J3/2823 , G01J3/427 , G01J3/4406 , G01J3/4412 , G01N21/6458 , G01N21/65 , G01N2021/1714
Abstract: System for performing chemical spectroscopy on samples from the scale of nanometers to millimeters or more with a multifunctional platform combining analytical and imaging techniques including dual beam photo-thermal spectroscopy with confocal microscopy, Raman spectroscopy, fluorescence detection, various vacuum analytical techniques and/or mass spectrometry. In embodiments described herein, the light beams of a dual-beam system are used for heating and sensing.
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公开(公告)号：US20180216996A1
公开(公告)日：2018-08-02
申请号：US15578397
申请日：2016-06-01
Inventor： Khanh Q. Kieu
CPC classification number: G01J3/10 , G01C19/72 , G01C19/721 , G01J3/42 , G01J3/427 , G01J3/45 , H01S3/06791 , H01S3/10038 , H01S3/10061 , H01S3/1109 , H01S3/1112 , H01S3/1608
Abstract: A method of interrogating an absorbing sample includes using a mode-locked laser mode-locked in both a clock-wise (CW) and a counter-clock wise (CCW) direction to generate first and second optical pulses having different repetition rates. One of the first and second optical pulses is directed in a CW direction and the other of the first and second optical pulses is directed in the CCW direction. The first optical pulses are transmitted through the absorbing sample to probe the absorbing sample while the second optical pulses are transmitted through the absorbing sample to act as a local oscillator. An interference pattern produced by interference between the first and second optical pulses is detected after traversing the absorbing sample.
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公开(公告)号：US20180143134A1
公开(公告)日：2018-05-24
申请号：US15785829
申请日：2017-10-17
Applicant: Airware, Inc.
Inventor： Jacob Y. Wong , Thomas Campbell
CPC classification number: G01N21/59 , G01J3/427 , G01N21/274 , G01N21/3577 , G01N33/49 , G01N2021/3148 , G01N2021/473 , G01N2201/0696 , G01N2201/127
Abstract: A glucose sensor measures glucose molecules in vivo through use of NDIR in which scattering noise is reduced and Absorption Interference Noise (AIN) is suppressed with a reflection technique. Electronics are used to provide an output of glucose concentration glucose in a liquid sampling matrix after it has been determined that a calibration curve is valid after signal processing is used to obtain average ratio values for reflected signal/reference channels and interference/reference channel obtained after a pulsed beam from signal, interference and reference sources is directed at an inclined angle to a normal of a spot of the liquid sampling matrix. The signal, interference and reference sources are each pulsed at a preselected frequency of at least N Hz which is sufficiently fast so that a given molecule of glucose or interfering molecule will not pass in and out of the liquid sampling matrix within the preselected frequency.
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公开(公告)号：US20180120160A1
公开(公告)日：2018-05-03
申请号：US15802504
申请日：2017-11-03
Inventor： Laurent BAUD , Alexandre MALTERE
CPC classification number: G01J3/36 , G01J1/44 , G01J1/46 , G01J3/2803 , G01J3/427 , G01J3/50 , H04N5/2354
Abstract: The multispectral detection device comprises first and second photodetectors sensitive to two different wavelengths. The two photodetectors are connected to two integration capacitors of two different readout circuits. Two reset circuits are configured so as to initialise the two integration capacitors separately. A first synchronisation circuit is connected to the first readout circuit and to the synchronisation signal and clock signal generators. The first synchronisation circuit is configured in such a way as to define the frame by detection of a leading edge of the synchronisation signal, count the number of occurrences of a trailing edge of the clock signal, initiate or terminate a data acquisition phase when the number of occurrences of trailing edges is equal to a threshold value recorded in a register of the first synchronisation circuit.
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