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5657121 |
Spectrum measuring device eliminating polarization dependency
A spectrum measuring device for measuring optical spectrum of input light includes first and second double-image elements which separate input light to be measured into two polarized wave...
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5652654 |
Dual beam spectrophotometer
A dual beam spectophotometer is described in which a beamsplitter is at least partially surrounded by a chopper, the combination of which provide sample and reference beams. An oscillating grating...
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5627671 |
Spectrometer slit switching mechanism
A spectrometer slit switching mechanism includes a slit plate having a plurality of entrance slits and exit slits formed at prescribed positions, parallel support rods for supporting the slit plate...
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5625270 |
Scanning monochromator with directly driven spectral-dispersion element
A scanning monochromator system which uses a directly coupled stepper motor to drive a spectral-dispersion element. The spectral-dispersion element is directly coupled to the output shaft of the...
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5557404 |
Spectrophotometer with a system for calibrating a monochromator
Irregular mechanical imperfections caused by constituent parts of a monochromator in connection with wavelength setting are compensated by calibrating the monochromator according to the present...
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5528364 |
High resolution EUV monochromator/spectrometer
This invention is related to a monochromator which employs a spherical mirror, a traveling plane mirror with simultaneous rotation, and a varied spacing plane grating. The divergent beam from the...
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5515162 |
Low noise light source for forensic examination
In accordance with the present invention, a low noise light source for illuminating a treated or untreated deposition of material for forensic examination is disclosed. A light having a wide range...
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5504576 |
Monochromator
A monochromator for examining very narrow band ranges of a light spectrum has a fixed inlet slot, a grid illuminated by said slot and rotatively driven by a grid drive, a fixed outlet slot arranged...
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5497230 |
Spectroradiometer
Light having a wavelength equal to or less than the cut-off wavelength of a sharp-cut filter is cut off so that an output of a photo-sensitive device corresponds to a stray light component when a...
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5497231 |
Monochromator having an oscilliating mirror beam-diffracting element for spectrometers
The monochromator has, as a beam-diffracting element, a scanning mirror (3) which is fastened on a vibratory spring, preferably a spring-steel strap (8), clamped on one side. The vibratory spring...
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5493393 |
Planar waveguide spectrograph
A spectrograph usable as a demultiplexer/detector in a wavelength division multiplexing optical system. The spectrograph comprises a planar waveguide and a detector array. The planar waveguide has...
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5455674 |
Method and apparatus for forensic examination of surfaces
A method of illuminating a deposition of organic material such as, blood, sweat or oil for forensic examination is disclosed. Light having a wide range of wavelengths is generated and directed...
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5448351 |
Echelle polychromator
An Echelle polychromator 50 has disposed upstream thereof a pre-monochromator 14 comprising a prism 20. The linear dispersion of the pre-monochromator 14 is variable by varying the angular...
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5434666 |
Acousto-optic spectral manipulator
A spectrometer is adapted to observe discrete wavelengths or spectral regions of a sample. The spectrometer includes a light source having spectral characteristics depending on the presence of a...
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5422719 |
Multi-wave-length spectrofluorometer
A multi-wavelength spectrofluorometer suitable for operation in laboratory, process control environments and in the field. The unit includes a multi-source flash tube, slits, diffraction grating...
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5412469 |
Optical spectrum analyzer and encoder using a modulated phase grating wherein said grating diffracts the wavelength as a function of the magnetic field
An apparatus and method of wavelength detection and parameter sensing uses a variable magnetic field applied to a Faraday effect thin magnetizable film to perform spectral analysis based on...
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5371586 |
Low aberration diffraction grating system
A light analysis system is disclosed and comprises a source of substantially collimated light to be analyzed. The source comprises a sample excited by a collimated laser light source, and further...
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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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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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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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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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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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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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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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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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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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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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5192981 |
Czerny-Turner monochromator
A monochromator of the Czerny-Turner type includes an entrance slit, a collimating mirror for receiving light output by the entrance slit, a planar grating for receiving light reflected by 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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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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5157456 |
Double monochromator
A double monochromator comprises an inlet slit 20, which is imaged in the plane of an intermediate slit 34 through a first grating monochromator 36. The intermediate slit 34 is imaged in the plane...
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5131736 |
Solid colloidal optical wavelength filter
A solid colloidal optical wavelength filter includes a suspension of spheal particles dispersed in a coagulable medium such as a setting plastic. The filter is formed by suspending spherical...
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5123740 |
Stray light trap in a monochrometer
A monochrometer having a stray light trap which substantially directs stray light away from light of wavelength of interest and/or absorb the stray light so as to substantially reduce the stray...
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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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5096295 |
Scanning monochromator
In its preferred embodiment, a scanning monochromator uses a pulse-driven micro-stepping motor to drive a spectral-dispersion element via a reduction-gear harmonic drive. The motor is directly...
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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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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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5078495 |
Monochromator
A plane grating, particularly for a monochronomator, is provided with varied-spaced straight and parallel grooves in a light beam path to compensate for other light affecting components, for...
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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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5030006 |
Monochromator for single and multiplexed dual wavelength spectroscopy
A monochromator utilizing a single light source productive of a uniformly intense, single beam, single wavelength coaxial beam output or alternatively, a single beam selected dual wavelength...
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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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5015069 |
Off axis rotation of diffraction grating
In a spectrophotometer application where high speed positioning is critical, a galvanometer in conjunction with a microprocessor controlled hybrid digital/analog servo system is used to rotate a...
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5011284 |
Detection system for Raman scattering employing holographic diffraction
The Raman scattering detector of this invention includes a source of collimated monochromatic illumination, a cube formed of two right angle prisms, a holographic optical element disposed between...
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4995725 |
Monochromator arrangement
A monochromator apparatus comprises a monochromator (9) and a reversing device (2) which, with the aid of four reversing mirrors (10, 11, 17, 18) shifts the exit ray (13), of a monochromator (9)...
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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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