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5173748 |
Scanning multichannel spectrometry using a charge-coupled device (CCD) in time-delay integration (TDI) mode
A spectrometer using a CCD array in the time-delay integration mode is claimed. The spectrometer comprises a CCD having a plurality of charged-coupled devices disposed along a scan dimension which...
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5170222 |
Measurement of spectra
A dual beam spectrophotometer has a blazed concave reflective grating 25, formed using the interference fringes of a coherent light beam reflected back from a spherical convex mirror 73 having a...
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5166747 |
Apparatus and method for analyzing the composition of formation fluids
A borehole apparatus for analyzing the composition of a formation fluid includes a chamber that contains the fluid, and a light source that directs light through the fluid in the chamber. The...
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5164786 |
Dispersive spectrometry installation with multi-channel detection
The invention relates to a spectrometry installation comprising an inlet, optical fiber means suitable for receiving an inlet beam and delivering a spectrally dispersed image of the beam which...
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5164586 |
Arrangement for measuring the absorption of transparent specimens mounted within an integrating sphere
The invention is directed to an arrangement for measuring the absorption of a transparent specimen. The arrangement includes: a radiation source for supplying radiation; a radiation-integrating...
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5160975 |
Spectrometer comprising a slit box
For exact positioning of optical elements, a spectrometer is provided with a holder which is constructed using plates having a sector of circle shape and a side wall portion comprising a...
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5159404 |
Diode-array spectrometer
A transparent carrier body of a diode-array spectrometer having a concave grating is configured as a biconvex lens and the diode array is mounted at a distance (d) to a second convex surface lying...
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5159199 |
Integrated filter and detector array for spectral imaging
A spectral imaging system having an integrated filter and photodetector array. The filter has narrow transmission bands which vary in frequency along the photodetector array. The frequency...
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5153679 |
Apparatus and process for measuring light absorbance or fluorescence in liquid samples
An apparatus for measuring light absorbance in a liquid sample which includes a light source for directing light into a sample cell, a cylindrical sample cell, a light detector for measuring...
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5149959 |
Airborne multiband imaging spectrometer
A multichannel imaging spectrometer for low speed, low altitude airborne geological, geophysical and environmental surveys, particularly adapted to provide detector limited noise threshold. An...
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5139335 |
Holographic grating imaging spectrometer
A spectrometer apparatus is provided including means for focusing a light beam with a concave holographic grating, means for passing light reflected from the grating through a step order filter to...
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5135305 |
Spectroanalytical system
A positioning mechanism support structure mounted for movement between first and second predetermined positions in a spectroanalytical system includes relative to a reference member by a plurality...
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5128549 |
Stray radiation compensation
A method of measuring and compensating stray light in absorbance analysis that use a multiple element array detector wherein one or more of the elements of the diode array are utilized to detect...
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5116123 |
Method for operating a photodiode array spectrometer and photodiode array spectrometer
A photodiode array spectrometer for determining the spectral composition of a polychromatic beam of radiation comprises an array of photosensitive elements intercepting different wavelengths of the...
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5114231 |
Spectroscopic analysis device
The subject of the invention is a spectroscopic analysis device comprising a light source, a light analyzer comprising an entrance slit, a diffraction grating and at least one exit slit which are...
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5112125 |
Spectral microscope with a photometer
A microscope with a Kohler illumination device having an at least approximately infinite beam (17) is described. An optical slit (6) is provided in the field diaphragm plane (LF) which is followed...
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5096294 |
Method and apparatus for measuring oxygen concentration and its subsequent use in estimating nitrogen fixation in plants
A non-invasive method and apparatus are described for measuring the oxygen concentration in the infected cells of the nodules of nitrogen fixing plants in the laboratory or field. In many cases,...
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5088823 |
Spectroanalytical systems
A spectroanalytical system includes entrance aperture defining structure for receiving radiation to be analyzed along a first path; collimating structure in the first path for providing collimated...
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5089915 |
Fabrication of aspheric surfaces through controlled deformation of the figure of spherical reflective surfaces
An aspheric mirror, for example in the form of an off-axis parabolic mirror or a toric mirror, that includes a first element having a front surface which defines a spherical reflector and a spaced...
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5087123 |
Atomic emission spectrometer with background compensation
A method of and a device for multi-element measurement of elements in a sample with correction for background emission. The method starts with atomizing a sample and then exciting the transformed...
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5082629 |
Thin-film spectroscopic sensor
There is disclosed an integrated spectrometer for chemical analysis by evanescent electromagnetic radiation absorption in a reaction volume. The spectrometer comprises a noninteractive waveguide, a...
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5082370 |
Industrial colorimeter having light intensity compensation means
A colorimeter provides compensation for changes in the color signature of an object due to lamp aging, stand off distance and view angle changes. The colorimeter senses and stores values indicative...
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5080486 |
Spectrum measuring equipment utilizing double-image polarizing element
In spectrum measuring equipment the light to be measured is separated by a double-image polarizing element into two polarized wave components whose planes of polarization cross each other...
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5071250 |
Spectrophotometer with fan speed control for temperature regulation
In a spectrophotometer having an oscillating grating, an entrance slit and an exit slit and a light source to irradiate said grating through said entrance slit, the grating and the light source are...
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5066127 |
Stigmatic imaging with spherical concave diffraction gratings
An improved method and apparatus for focused stigmatic imaging with spherical concave diffraction gratings incorporates a concave spherical diffraction grating with parallel, normally ruled lines....
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5066126 |
Optical spectrum analyzer
An optical spectrum analyzer includes a surface elastic wave generator for generating in an optical waveguide a surface elastic wave which has a continuously varying frequency and which diffracts...
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5055684 |
System to reduce wave shift error in spectrophotometer caused by hot spots in the light source
An improved near infrared spectrophotometer is disclosed which reduces wave shift errors arising from hot spots in a light source. A ground quartz plate uniformly diffuses radiation from the light...
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5050991 |
High optical density measuring spectrometer
An apparatus is disclosed for measuring the spectra of a high optical density sample having substantially known optical properties. In a preferred embodiment, the apparatus comprises: a laser for...
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5050992 |
Dispersive holographic spectrometer
This invention relates to a dispersive holographic spectrometer (12) for analyzing radiation from an infrared source (16). The holographic spectrometer (12) comprises a piezoelectric block (40)...
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5042893 |
Direct mount coupling to a spectrophotometer
A fiber optic coupler for use with a diode array spectrophotometer system that optimizes the optical interface between a first fiber optic waveguide employed to couple light from a sample under...
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5042948 |
Industrial colorimeter having lamp aging compensation means
A colorimeter provides compensation for changes in the color signature of an object due to lamp aging. A current measuring circuit measures current to the lamp during an initial training of the...
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5040889 |
Spectrometer with combined visible and ultraviolet sample illumination
In an optical instrument, a fiber optic probe is provided to irradiate a sample with visible NIR and ultraviolet light. Glass fibers carry the visible and NIR light to the probe from a visible and...
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5037201 |
Spectral resolving and sensing apparatus
A compact, self contained image resolving and sensing apparatus of the type used in electronic imaging applications includes a plurality of sensing devices such as photodetectors formed on a...
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5029245 |
Procedure for controlling a radiation source and controllable radiation source
The present invention concerns a procedure for controlling a radiation source which has been implemented with the aid of light-emitting diodes, or LEDs, from the radiation produced by them being...
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5028134 |
Depolarizer for light measuring instruments
Light measuring instruments have a sensitivity to polarization states of the light being measured. To minimize such sensitivity a depolarizer is used. The depolarizer includes a half wave...
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5026160 |
Monolithic optical programmable spectrograph (MOPS)
A solid monolithic spectrograph utilizes the Czerny-Turner geometric confration. It has a base constructed of BK7 optical glass to which all components are affixed with optical epoxy. The compact...
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5022755 |
Photodiode configurations for simultaneous background correction and specific wavelength detection
In a spectrophotometer having photodetectors positioned at fixed wavelengths, the photodetector is divided into three subdetectors, a main subdetector on the wavelength of interest and two...
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5020910 |
Monolithic diffraction spectrometer
A monolithic diffraction spectrometer having a diffraction grating formed over a light sensing array is provided. The diffraction grating serves to diffract wavelengths of interest to an underlying...
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5018856 |
Continuum source atomic absorption spectrometry
The instant invention relates to a process and apparatus for atomic absorption analysis, utilizing: atomization of a sample (containing one or more elements), illuminating the atomized sample with...
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5017785 |
IR-spectrometric analyzing procedure and means
An IR-spectrometric analyzing procedure, the measuring absorbance and reference absorbance being detected simultaneously from an IR light beam conducted to pass through the sample and diffracted to...
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5014216 |
Concentration determination with multiple wavelength flash photometers
A monobeam system for determining concentration changes of chromophore substance in a sample includes a flash lamp for passing a light beam through a sample containing the analyte. The values of...
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5002392 |
Multichannel optical monitoring system
A multichannel optical monitoring system for monitoring the spectral transmission of a plurality of samples. A plurality of light beams are generated and a plurality of optical monitoring stations...
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5002390 |
Atomic emission spectrometer for simultaneous multi-element measurement of elements in a sample
An atomic emission spectrometer for multi-element measurement of elements in a sample comprises an apparatus to atomize the sample and to excite the atoms for emitting characteristic spectral...
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4997769 |
Method and an apparatus for determining blood components
Method and apparatus for spectrophotometrically determining the concentration of a number of hemoglobin derivatives comprising at least deoxyhemoglobin and oxyhemoglobin or parameters derived from...
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4997281 |
Grating spectrometer
An improved flat field grating spectrometer for increasing the spectral resolutiion and usable spectral range. The spectrometer comprises an entrance slit or port, a concave grating, a field...
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4997280 |
Spectrophotometric instrument with rapid scanning distortion correction
In a spectrophotometric instrument, a system is provided to correct for distortion caused by rapid scanning of the spectrum. In the instrument, photodetectors detect light energy which is scanned...
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4995724 |
Optical spectrum analyzer with high performance measurement function
A spectroscope device of the dispersion type receives light to be measured and emits it as dispersed light which corresponds to each of wavelengths to be measured. An optical-path switching device...
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4995721 |
Two-dimensional spectrometer
A double-pass two-dimensional spectrometer utilizes a telescope wich contains only reflective optical components and is therefore free of chromatic aberrations. The telescope is so used in...
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4993834 |
Spectrometer for the simultaneous measurement of intensity in various spectral regions
A polychromator in a Paschen-Runge mounting in which intensity measurements are made by means of a row of photodiodes. The spectral intensity distribution of at least two spectral regions on the...
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4991934 |
Varied space diffraction grating and in-focus monochromator
An optical system and method comprising a diffraction grating which consists of diffracting elements spaced from one another by unequal distances. Correction of residual defocusing in the image...
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