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5267178 |
Photometric process and computer controlled photometer
A computer controlled spectrophotometer is equipped with a serial interface to which a bar code reader can be connected. Using the bar code reader, calibration and configuration data or functional...
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5262840 |
Multispectral reflectometer
A reflectometer for measuring absorption of light in selected regions of the light spectrum by a diffuse reflector. The reflectometer is adapted to precisely measure absorption resulting from the...
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5260767 |
Compact all-reflective imaging spectrometer
An all-reflective imaging spectrometer (10) has a three-mirror anastigmat (12) acting as its objective and a reflective triplet (14) with a dispersive element (18) providing the spectrometer...
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5257086 |
Optical spectrophotometer having a multi-element light source
A spectrophotometer includes an array of light emitting diodes configured for activation in successive Hadamard encodement patterns, a diffraction grating, an optical slit, a detector and...
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5257085 |
Spectrally dispersive imaging lidar system
An imaging UV/visible fluorosensing and Raman lidar system comprises an optical sensor for simultaneously measuring temporally, spatially and spectrally resolved laser backscatter from on the land,...
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5251007 |
Dual-beam spectrometer
The invention relates to a dual-beam spectrometer in which a measuring beam, after passage through a measuring cell, and a reference beam each travel through an entrance slit into a spectrometer....
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5251006 |
Automatic spectrophotometer calibration system
In a spectrophotometer having an oscillating grating, an automatic calibration system is provided to ensure that the instrument constants are recomputed before each measurement of an unknown...
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5245399 |
System for non-contact colored label identification and inspection and method therefor
An optical inspection system which inspects for the presence of defects in colored labels placed, for example, on the side walls of cylindrical beverage cans. The optical inspection system utilizes...
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5239359 |
Absorbance monitor
To reduce noise in an absorbance monitor in which the light source is a deuterium lamp, an aspheric condensing mirror focuses light from an approximately 0.6 mm-high by 2 mm-wide part of the...
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5239174 |
Spectral intensity measuring system for measuring repetitively pulsed light having a multichannel detector array and adjustment system including a digital phase locked loop
The present invention is a system for optically sampling and electronically measuring the spectral intensity and integrated intensity and temporal characteristics of a repetitively or...
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5235402 |
Spectrometer
In a spectrometer using a two dimensional CCD array as a detector a column or a substantial part of a column of pixels is used to detect radiation of a given wavelength. The output circuit (52) of...
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5233405 |
Optical spectrum analyzer having double-pass monochromator
A double pass scanning monochromator for use in an optical spectrum analyzer includes an input optical fiber for emitting an input light beam, a diffraction grating for diffracting the input light...
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5231462 |
Optical spectrophotometer with wavelength modulation
A spectrophotometer useful for measuring absorption or emission bands of a substance irradiated with optical radiation, comprises a light source for producing the optical radiation, a monochromator...
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5231461 |
Solar monochromator for filter calibration
A method and system for calibrating color filters employed in polychromatic imaging of a subject includes a scanning mirror (28), telescope (30), filters (104), and a detector array (60) employed...
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5229838 |
Photodetector amplitude linearity
To calibrate a photodetector, a rotating disk with a slot is disposed in a light beam with decreasing speed from a defined maximum rotational speed to a defined minimum speed, while magnitudes and...
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5223913 |
Spectrophotometer
A spectrophotometer including: a) a light source switching mechanism for switching a plurality of light sources by swinging a light source mirror; b) a filter selecting mechanism; c) a diffraction...
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5221959 |
Color discrimination data input apparatus
A color discrimination data input apparatus includes a light source for generating illumination light for illuminating a target object, a spectroscope for producing a spectrum having a plurality of...
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5212537 |
Calibration technique for monochromators and spectrophotometers
A photometer having a plurality of input fibers to its optical entrance, at least one of which is for transmission of calibration light and at least one of which is for transmission of sample...
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5210590 |
Rapid scanning spectrographic analyzer
An fixed grating, detector-array type analyzer rapidly multiplexes multiple channels. The analyzer comprises a light source, a detector array-type spectrograph, and an optical multiplexer. The...
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5206701 |
Apparatus for near-infrared spectrophotometric analysis
An apparatus is provided for obtaining spectral information and quantifying the physical properties of a sample. The apparatus comprises a light source and a high-efficiency fiber optic switch...
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5198870 |
Atomic line emission analyzer for hydrogen isotopes
Apparatus for isotopic analysis of hydrogen comprises a low pressure chamber into which a sample of hydrogen is introduced and then exposed to an electrical discharge to excite the electrons of the...
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5192980 |
Apparatus and method for method for spatially- and spectrally-resolved measurements
A scanning optical microscope or mapping system for spectrally-resolved measurement of light reflected, emitted or scatttered from a specimen is disclosed, in which the spectrally-resolving element...
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H001152 |
Imaging channeled spectrograph
An Imaging Channeled Spectrograph is provided which comprises a Fabry-Perot bandpass filter followed by a wide-slit imaging grating spectrograph, and which thus combines the two dimensional...
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5189486 |
Echelle polychromator
The invention relates to an Echelle polychromator and can be employed in instruments for the spectrophotometric investigation of radiation sources. It is characterized in that, connected in series...
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5184193 |
Dual fiber optic spectrophotometer
Spectrophotometric apparatus and methodology suitable for continuous and long-term use. The apparatus includes a monochromator providing pre-dispersed monochromatic light to the optical inputs of a...
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5182609 |
Spectrometer
The invention relates to a spectrometer useful in analytical spectroscopy. The spectrometer has an imaging diffraction grating, a planar receiver system, and an element for flattening the image...
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5179423 |
Gain stabilized self-scanning photo-diode array
A method and apparatus for stabilizing the gain of a self scanned photo-diode array is provided for use with spectrophotometers and other light measurement equipment. A gain stabilizer light...
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5177560 |
Optical spectrum analyzer having adjustable sensitivity
An optical spectrum analyzer is provided with a user selectable sensitivity. Required operating parameters are set in response to user selection of sensitivity to permit measurement of an input...
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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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5120126 |
System for non-contact colored label identification and inspection and method therefor
An optical inspection system which inspects for the presence of defects in colored labels placed, for example, on the side walls of cylindrical beverage cans. The optical inspection system utilizes...
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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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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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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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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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