Patents-Review.com
ClassID:

167889 ⎘

G01N2021/451 - CPC Classification

Classification description:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light; Systems in which incident light is modified in accordance with the properties of the material investigated; Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods for determining the optical absorption

Recent Application in this class:
#1
20250208038
2025-06-26

MEASURING ARRANGEMENTS AND METHODS FOR THE DETECTION OF TRACE GASES IN A SAMPLE GAS

 #2
20250198922
2025-06-19

Mirror Movement Mechanism And Interferometer

 #3
20250198921
2025-06-19

DEVICE FOR MEASURING THE REFRACTIVE INDEX OF A FLUID

 #4
20240361237
2024-10-31

INTERFEROMETRIC ELEMENT, DEVICE FOR DETECTING A COMPOUND COMPRISING AN INTERFEROMETRIC ELEMENT AND METHOD FOR DETECTING A COMPOUND

 #5
20240275128
2024-08-15

SPECTROSCOPIC DETECTION USING A TUNABLE FREQUENCY COMB

 #6
20230349824
2023-11-02

Interferometric gas sensor

 #7
20230236122
2023-07-27

PROGNOSIS METHOD FOR BLOOD DISORDERS

 #8
20230221250
2023-07-13

METHOD AND APPARATUS FOR DETERMINING OPTICAL DENSITY OF A SOLUTION

 #9
20230122507
2023-04-20

METHOD FOR CHARACTERIZING A BIOLOGICAL MICROTISSUE USING IMAGING

 #10
20220196572
2022-06-23

Integration of an Optical Height Sensor in Mask Inspection Tools

 #11
20210349068
2021-11-11

Fluid sensing systems and methods

 #12
20200264097
2020-08-20

Hybrid phonon-enhanced optical absorbers and emitters

 #13
20200249154
2020-08-06

Diffuse optical imaging with multiple beams

 #14
20200182787
2020-06-11

Optical detection method

 #15
20200166453
2020-05-28

Method for spectroscopically or spectrometrically examining a sample, and interferometric device

 #16
20190257751
2019-08-22

Chirped laser dispersion spectroscopy sensitivity booster

 #17
20190162643
2019-05-30

Photo-thermal interferometer

 #18
20190011362
2019-01-10

Devices and methods for coherent detection using chirped laser pulses

 #19
20190011361
2019-01-10

Fluid analyzer

 #20
20180011007
2018-01-11

Arrangement for measuring gas concentrations

 #21
20170360287
2017-12-21

Light source device and endoscope system

 #22
20170256909
2017-09-07

Spectroscopic detection using a tunable frequency comb

 #23
20130278922
2013-10-24

Interferometric systems and methods

 #24
20130130307
2013-05-23

Cell observation device and cell observation method

 #25
20120268746
2012-10-25

Chirp modulation-based detection of chirped laser molecular dispersion spectra

 #26
20120026485
2012-02-02

Device for measuring the focal distance of a thermal lens

 #27
20110184624
2011-07-28

GAS DETECTION DEVICE

 #28
20100040981
2010-02-18

Processes for producing tunable optical cavities

 #29
20080304046
2008-12-11

Imaging apparatus for infrared rays nonlinear molecular vibrational microscopy

 #30
20080186508
2008-08-07

Tuning optical cavities

 #31
20060262316
2006-11-23

System and method for interferometric laser photoacoustic spectroscopy

 #32
18329585
2023-10-24

Method for measuring multiple parameters of mixed gases based on broadband infrared light source

 #33
15593248
2018-09-04

Devices and methods for coherent detection using chirped laser pulses