Patents-Review.com
ClassID:

167867 ⎘

G01N21/412 - 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 Index profiling of optical fibres

Recent Application in this class:
#1
20260098805
2026-04-09

OPTICAL FIBER CHARACTERISTIC MEASUREMENT SYSTEM AND HUMIDITY MEASUREMENT METHOD

 #2
20260029342
2026-01-29

OPTICAL FIBER PREFORM, METHOD FOR MEASURING REFRACTIVE INDEX PROFILE OF OPTICAL FIBER PREFORM, AND METHOD FOR PRODUCING OPTICAL FIBER PREFORM

 #3
20250224387
2025-07-10

AMMONIA GAS SENSOR BASED ON SMALL-PERIOD LONGPERIOD FIBER GRATING

 #4
20240426750
2024-12-26

TOMOGRAPHIC REFRACTIVE INDEX PROFILE EVALUATION OF NON-SYMMETRICAL GLASS FIBER PREFORMS AND FIBERS THEMSELVES

 #5
20240369479
2024-11-07

ULTRA LOW-NA REFRACTIVE INDEX PROFILING SYSTEM AND METHOD FOR FILTERING OUT SEVERELY DISTURBING DIFFRACTION EFFECTS

 #6
20230107854
2023-04-06

Method for determining the refractive-index profile of a cylindrical optical object

 #7
20220307980
2022-09-29

METHOD AND DEVICE FOR CHARACTERIZING A MEDIUM USING REFRACTIVE INDEX

 #8
20220286204
2022-09-08

Upward collapse process and apparatus for making glass preforms

 #9
20210396660
2021-12-23

Apparatus and method for detecting phase changes in a fluid using spectral recognition

 #10
20210370574
2021-12-02

Method and device for controlling a production system for planar or strand-shaped bodies

 #11
20210333260
2021-10-28

Methods and apparatuses for monitoring the curing of a photocurable material

 #12
20200182717
2020-06-11

Linear cavity ring down device

 #13
20200088631
2020-03-19

Apparatus and method for detecting phase changes in a fluid using spectral recognition

 #14
20180266947
2018-09-20

Monitoring probe

 #15
20180145752
2018-05-24

Upward collapse process and apparatus for making glass preforms

 #16
20180113052
2018-04-26

Method for determining the refractive index profile of a cylindrical optical object, particularly a preform for an optical fiber

 #17
20180106719
2018-04-19

In-situ detection of hollow glass fiber formation

 #18
20180106718
2018-04-19

In-situ detection of glass fiber defects

 #19
20180100782
2018-04-12

Method of evaluating characteristics of optical fiber, and apparatus of evaluating characteristics of optical fiber

 #20
20170307521
2017-10-26

Device and method for determining a refractive index

 #21
20170234769
2017-08-17

Methods and apparatus for determining geometric properties of optical fiber preforms

 #22
20160298952
2016-10-13

Parameter measurement of phase objects using tomographic imaging

 #23
20160123873
2016-05-05

High precision measurement of refractive index profile of cylindrical glass bodies

 #24
20140118740
2014-05-01

Systems and methods for measuring a profile characteristic of a glass sample

 #25
20140118726
2014-05-01

Device for measuring refractive index of medium based on optical delay technology and its method

 #26
20140017809
2014-01-16

Optical fiber probe

 #27
20130294975
2013-11-07

FIBER OPTIC APPARATUS FOR OXYGEN SENSING

 #28
20120105831
2012-05-03

Measuring modal content of multi-moded fibers

 #29
20110228260
2011-09-22

System and method for measuring an optical fiber

 #30
20110207237
2011-08-25

Optical fiber probe

 #31
20110088433
2011-04-21

Methods For Drawing Multimode Bend Resistant Optical Fiber

 #32
20100245805
2010-09-30

Methods of measuring the refractive index profile of a transparent cylindrical object

 #33
20090262337
2009-10-22

Measuring modal content of multi-moded fibers

 #34
20080271493
2008-11-06

Method for elongating a glass body

 #35
20050259243
2005-11-24

Method and apparatus for testing optical fiber cables

 #36
20050157312
2005-07-21

Interferometric optical tomography

 #37
20050013525
2005-01-20

Optical fibre means

 #38
15617801
2019-07-23

Fiber optic bolometer

 #39
15297197
2018-01-09

In-situ detection of hollow glass fiber formation

 #40
14725256
2016-06-14

Inter-grating fiber spaced multi-DRLPG doped optical sensor