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5369483 |
Analysis of polymer melt stream
The concentration of a colorant in a stream of molten polymer is measured by inserting a probe adjacent to the stream. The probe has integral therein collection means and illumination means. The...
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5365334 |
Micro photoreflectance semiconductor wafer analyzer
An apparatus for measuring local carrier concentration in a preselected area of a semi-conductor is shown and described. An exciting light (preferably a laser) alters the sample's band-gap by photo...
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5359409 |
Diffraction grating position sensing and control for a scanning 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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5343289 |
Spectrometer assembly with post disperser assembly
A spectrometer system with structure defining an entrance aperture, dispersing structure, structure defining a plurality of exit apertures, detector structure associated with each exit aperture and...
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5339151 |
Spectrometer for lensometer
A spectrometer is incorporated to a conventional lensometer. The spectrometer includes a uniform extended light source including a light source having visible and ultraviolet emission and an...
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5329353 |
High sensitive multi-wavelength spectral analyzer
A compact, high sensitive, multi-wavelength spectral analyzer capable of simultaneously obtaining a spectral distribution of extremely weak radiation such as bioluminescence, chemiluminescence,...
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5329352 |
Spectroscopically correlated light scanning microscopy
The present invention relates to a process for producing and correlating light microscope images and spectroscopic data resolved according to wavelength of a sample by scanning individual elements...
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5321970 |
Method and apparatus for calibrating a spectrometer
A calibration device for use in a spectrometer has a source of electromagnetic radiation, a detector for detecting electromagnetic radiation from the source, a device for recording the output of...
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5319437 |
Handheld portable spectrophotometer
A handheld portable spectrophotometer is provided including keys for input of instructions by a user, an illuminator for illuminating a sample, and a spectral analyzer for separating light...
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5317379 |
Chemical species optical analyzer with multiple fiber channels
An analyzer measures properties of multiple chemical samples, and includes an optical filter element having a long axis and positioned at a location where simultaneous multiple light beams,...
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5305082 |
High spatial resolution imaging spectrograph
A high resolution fast imaging spectrograph is disclosed which provides 400 spatial channels and 100 spectral channels of information. A collimating mirror (10) and a focusing mirror (12) face a...
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5305233 |
Spectrophotometer for accurately measuring light intensity in a specific wavelength region
A spectrophotometer utilizes a band-pass filter array for splitting incident light into a plurality of light components of different wavelengths, a plurality of silicon photodiodes for receiving...
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5305083 |
Random access monochromator
A random access monochromator is disclosed. This device has no mechanical parts and eliminates the need to scan sequentially the wavelengths of light contained in a light spectrum to select a...
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5303028 |
Spectrometer apparatus for calibrating color imaging apparatus
Spectrometer apparatus for calibrating a color image scanner includes an opaque member, having an optical slit, movable into position on an optical axis of the scanner between its polychromatic...
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5303027 |
Photodiode array
A photodiode array comprises a plurality of n channels, each channel having a photodiode which is reverse biased such that it acts as a current source. Each channel further comprises an A/D...
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5303165 |
Standardizing and calibrating a spectrometric instrument
A spectrometric instrument which exhibits an intrinsic profile for a sharp spectral line produces profile data for narrow spectral lines. The spectral lines are effected with a high finesse etalon...
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5301006 |
Emission microscope
An emission microscope system includes in various embodiments a catadioptric optical microscope and/or a computer automated optical dispensing system and/or a cryogenically cooled back thinned CCD...
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5297555 |
Multichannel spectrometer
The invention relates to a multichannel spectrometer (10), in particular for examining moles (16) having an evaluating and display device (14) and optical means (18, 19, 21, 23, 22) to determine...
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5296911 |
Optical test system for a chemical analyzer
A compact optical test system for a chemical analyzer comprises a light-proof enclosure formed by two joined side compartments. One includes control surfaces for accurately positioning optical...
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5285255 |
Optical system for spectral analysis
An optical device for the spectral analysis of a light source which comprises a spectrograph assembly including a dispersive element, and a classical collimator. The spectrograph assembly supplies...
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5283624 |
Multi-element simultaneous analysis atomic absorption spectroscopy photometer and multi-element simultaneous analytic method
Incident slits and exit slits are provided separately on corresponding optical axes incident simultaneously on a spectroscope from a sample atomizing unit. A mechanism for changing the widths of...
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5280338 |
Multi-grating spectrograph and method of changing gratings
An improved multiple grating spectrograph is provided comprising a grating changer for mounting gratings, and rotatable about an axis substantially perpendicular to grating lines such that changing...
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5278630 |
Absorbance detector
An absorbance detector measures absorbance alternately at first and second wavelengths. When a measurement is made at one wavelength, a projection is made, based on past measurement, of the value...
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5276499 |
Spectrophotometer
A spectrophotometer which takes out monochromatic lights from lights from light sources by using spectroscopes and transmits the monochromatic lights through a sample and detects the transmitted...
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5274435 |
Grating monochromators and spectrometers based on surface normal rotation
An optical system and method comprising a diffraction grating which rotates about its surface normal to change the magnitude of the wavelength diffracted to an image location. At grazing incidence,...
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5268737 |
Method and apparatus for calibrating a spectrophotometer
A spectrophotometer of the type using a pulse motor to rotate a diffraction grating through a speed reducing mechanism has a capability of constructing a conversion table according to a program, by...
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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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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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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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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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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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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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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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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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