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Class Information
Number: 356/128
Name: Optics: measuring and testing > Refraction testing (e.g., refractometers)
Description: Subject matter for testing the refraction of a fluid or solid wherein there is generally means to contain the fluid or support the solid statically or in motion; generally means, which may include a light source and which may be monochromatic light, to cause a diffused or a collimated beam of light to be transmitted through the fluid or solid under test or to be transmitted and reflected internally from the surface of an optically transmissive member contiguous to the fluid or solid under test; and a visual or photoelectric device to note or measure the intensity of the light transmitted through the fluid or solid or the change in angle, direction, or the displacement of the light traversing the fluid or solid as a result of the light being refracted by the fluid or solid tested.










Sub-classes under this class:

Class Number Class Name Patents
356/130 Differential 38
356/135 Prism engaging specimen 68
356/134 Prism forming fluid specimen container 27
356/133 Refractive rod engages specimen 83
356/129 Schlieren effect 28


Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8709356 Systems and methods for minimization or elimination of diffusion effects in a microfluidic system Apr. 29, 2014
8711344 Method for remotely measuring fluctuations in the optical index of refraction of a medium Apr. 29, 2014
8692985 Method of determining refractive index of prism shaped material Apr. 8, 2014
8649003 Microrefractometer using defocusing imaging Feb. 11, 2014
8628678 Method for measuring the active KOH concentration in a KOH etching process Jan. 14, 2014
8605271 Critical-angle refractometery Dec. 10, 2013
8593624 Refractive index measuring apparatus Nov. 26, 2013
8542353 Refractive index sensor for fluid analysis Sep. 24, 2013
8525982 Refractive index distribution measuring method and refractive index distribution measuring apparatus Sep. 3, 2013
8520207 Detection system for birefringence measurement Aug. 27, 2013
8520218 Measuring method of refractive index and measuring apparatus of refractive index Aug. 27, 2013
8508725 Refractive index distribution measuring method and apparatus using position measurement and a reference object Aug. 13, 2013
8477297 Refractive index distribution measuring method and apparatus, and method of producing optical element thereof, that use multiple transmission wavefronts of a test object immersed in at least o Jul. 2, 2013
8472013 Refractive index distribution measurement method and apparatus that measure transmission wavefronts of a test object immersed in different media having refractive index lower than that of the Jun. 25, 2013
8472014 Refractive index distribution measuring method and refractive index distribution measuring apparatus Jun. 25, 2013
8467038 Method and device for measuring optical properties of an optically variable marking applied to an object Jun. 18, 2013
8467044 Continuous index of refraction compensation method for measurements in a medium Jun. 18, 2013
8446588 Axial illumination for capillary electrophoresis May. 21, 2013
8411262 Downhole gas breakout sensor Apr. 2, 2013
8351029 Optical fiber sensor Jan. 8, 2013
8310664 Refractive index distribution measuring method and refractive index distribution measuring apparatus Nov. 13, 2012
8284389 Refractometer Oct. 9, 2012
8279427 Method and apparatus for measuring the refractive index of a material with Bragg gratings Oct. 2, 2012
8274643 Porous nanostructures and methods involving the same Sep. 25, 2012
8269956 Optical element, refractive index sensor, refractive index sensor array, and biosensor Sep. 18, 2012
8253932 Laser and corner cube refractive-index structure parameter system Aug. 28, 2012
8248605 Detection system for birefringence measurement Aug. 21, 2012
8239144 Universal refractometer apparatus and method Aug. 7, 2012
8228489 Optical sensing system for liquid fuels Jul. 24, 2012
8218133 Refractive index tool and method Jul. 10, 2012
8184276 Continuous index of refraction compensation method for measurements in a medium May. 22, 2012
8125634 Optical additive solc filter for deep ultraviolet applications Feb. 28, 2012
8089620 Method for measuring optical characteristics of diffraction optical element and apparatus for measuring optical characteristics of diffraction optical element Jan. 3, 2012
8062900 Optically readable microplate Nov. 22, 2011
8040498 Method and system for identification of changes in fluids Oct. 18, 2011
8009293 Modulation cancellation method in laser spectroscopy Aug. 30, 2011
7999931 Packaging or container with optical indicator Aug. 16, 2011
7990527 Refractive-index sensor Aug. 2, 2011
7969562 Method and apparatus for measuring the birefringence autocorrelation length in optical fibers Jun. 28, 2011
7916285 Refractometer Mar. 29, 2011
7911594 Method to derive physical properties of a sample after correcting the effects of interdetector band broadening Mar. 22, 2011
7911597 Inspection apparatus to simultaneously measure the sugar content and weight of fruit Mar. 22, 2011
7907264 Measurement of thin film porosity Mar. 15, 2011
7903243 Automatic brewster angle refractometer Mar. 8, 2011
7859664 Plurality of samples and method for selecting a target sample therefrom Dec. 28, 2010
7842243 Chemical sensor with an indicator dye Nov. 30, 2010
7821622 Optical refractometer for measuring seawater salinity and corresponding salinity sensor Oct. 26, 2010
7800746 Method for identifying refractive-index fluctuations of a target Sep. 21, 2010
7791717 Reflective display device testing system, apparatus, and method Sep. 7, 2010
7777872 Method of measuring diffractive lenses Aug. 17, 2010

1 2 3 4 5 6 7










 
 
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