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6683686 |
Temporally resolved wavelength measurement method and apparatus
The invention provides a method and apparatus for determining the wavelength of a sample source of light, the apparatus having a reference light source of known wavelength, a collimator for...
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6678044 |
Monochromator and optical spectrum analyzer equipped with the same
Plane diffraction grating 13 is formed of a material having an appropriate linear expansion coefficient and a variation in the wavelength of the reflected light from concave mirror 14 on...
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6646740 |
Optical monochromators having time dispersion correction
An optical filter for generating a filter output signal from a filter input signal, the filter output signal consisting of light from the filter input signal in a predetermined bandwidth. The...
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6646739 |
Four-stage type monochromator
In a four-stage type monochromator, there is provided a returning reflector 6 for making the dispersing direction of the wavelength of light 13 e and 13 h incident on and emergent from a...
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6643011 |
SNR calculation method and optical spectrum measurement apparatus
An SNR calculation method having the steps of measuring the wavelength characteristic of a dynamic range in an optical spectrum measurement apparatus for each wavelength in a multiplexed wavelength...
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6636306 |
Optical spectrum analyzer
An optical spectrum analyzer comprises a diffraction grating (DG), a polarization decomposing unit (PDM) for decomposing the input light beam into first and second light beams having...
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6628383 |
Imaging spectrograph for multiorder spectroscopy
The Ebert-type mounting is modified for use as a multiorder spectrograph, by replacing the spherical primary mirror of the Ebert with a paraboloidal mirror to eliminate the astigmatism and...
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6597452 |
Compact littrow-type scanning spectrometer
A Littrow-type spectrometer or monochromator using a folded light path to provide a compact optical instrument is disclosed. Light enters the instrument through an inlet aperture on a planar...
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6597451 |
Spectrometry measuring apparatus
In a spectrographic type spectrometry measuring apparatus employing a concave holographic diffraction grating or a replica thereof, a small-size and light-weight spectrometry measuring apparatus...
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6590649 |
Spectrophotometer
A spectrophotometer, comprising a housing in which a measuring system is arranged, which housing has a measuring opening, via which light is passed to the measuring system. The measuring system...
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6587196 |
Oscillating mechanism driven monochromator
The invention provides a mechanism for oscillating the spectral grating of a monochromator. The mechanism couples the spectral grating of the monochromator to an oscillating spatial linkage...
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6583874 |
Spectrometer with holographic and echelle gratings
A spectrometer has higher resolving power without enlarging a size of the apparatus. This spectrometer has a slit board, a mirror, a collimator lens, a holographic grating, an Echelle grating, a...
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6573989 |
Spectrometer
A spectrometer measures a spectrum of a light beam supplied from a light source so as to obtain fine information and coarse information of the spectrum easily. This spectrometer has a holographic...
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6549280 |
Spectrometer with double off-axis schmidt telescope
The spectrometer comprises, in combination: a slit ( 1 ) for the entry of a light beam; a collimator; a dispersion system ( 9 ); focusing means and a detector ( 13 ). The collimator comprises at...
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6549281 |
Monochromator and spectrometric method
In the monochromator, when measured beam which is diffracted by a plane diffraction grating is collected by a collimator to be returned, the measured beam is displaced by a displacement member in a...
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6538737 |
High resolution etalon-grating spectrometer
A high resolution etalon-grating spectrometer. A preferred embodiment presents an extremely narrow slit function in the ultraviolet range and is very useful for measuring bandwidth of narrow band...
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6525814 |
Apparatus and method for producing a spectrally variable radiation source and systems including same
An apparatus and method for producing a spectrally variable radiation source and systems including same is disclosed. An embodiment of a spectrally variable radiation source is disclosed including...
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6507399 |
Device for adjusting angular play
The invention concerns a device for adjusting angular play on a predetermined angular range of an optical element mobile in rotation relative to a frame. Said device comprises a contact piece ( 3...
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6486948 |
Apparatus and methods relating to high speed Raman spectroscopy
Systems and methods for rapid Raman spectroscopy. The speed is improved by providing light from a sample to a light-dispersive element, such as a holographic grating, in a pattern that inversely...
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6452674 |
In-situ wave correction apparatus
A wavelength correction apparatus automatically corrects a deviation of a testing wavelength from a reference spectrum analyzer installed on-site. The apparatus is constructed of a reference light...
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6414753 |
Low stray light czerny-turner monochromator
A monochromator is provided which reduces the amount of stray light striking the detector of the monochromator. A light source is provided which directs light to a source mirror. The source mirror...
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6362878 |
Multipoint wavelength calibration technique
Improved calibration of optical wavelength measuring instruments. In a first embodiment, improved calibration is achieved in an optical wavelength measuring instrument by performing calibration...
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6278534 |
Dispersive optical device
A compact, preferably monolithic optical element converts an incident beam of light into a dispersed exit beam. A transmissive optical grating is supported between two reflective surfaces such that...
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6275289 |
Monochromator
In a monochromator including a light dispersing element rotatable about an axis, a linear motor for rotating the light dispersing element around the axis, an encoder for generating a signal...
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H001979 |
Electronic streak camera
An electronic streak camera is described which includes a housing enclosing an objective lens disposed along an optical axis for forming an image of optical radiation from an emissive body, a...
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6226084 |
Calibration method
The invention relates to a method of calibrating an optical system, the system comprising a flash lamp as a light source (4), a lens system (6), a monochromator comprising a grating (10), a motor...
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6166805 |
Double pass monochromator
The present invention relates to a double pass monochromator that improves wavelength resolution and reduces the actual length thereof. A return reflection means 7 that reverses the direction of...
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6151112 |
High-resolution, compact intracavity laser spectrometer
In accordance with the present invention, a high-resolution, compact spectrometer is provided for dispersing wavelengths λ of an incoming beam for detection by a detector. The spectrometer...
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6147761 |
Color sensor
A sensor for measuring reflective, transmissive, or self-luminous samples, comprises a plurality of light sources, where each of the light sources emit light of a substantially different wavelength...
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6081332 |
Monochromator
A monochromator including an incident portion upon which light to be measured is made incident; a first lens for converting the incident light to be measured into parallel rays of light; a...
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6078048 |
Immersion echelle spectrograph
A small spectrograph containing no moving components and capable of providing high resolution spectra of the mid-infrared region from 2 microns to 4 microns in wavelength. The resolving power of...
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6038018 |
Substrate inspecting apparatus, substrate inspecting system having the same apparatus and substrate inspecting method
A substrate inspecting system 60 observes and inspect a semiconductor wafer pattern by irradiating the surface of the semiconductor wafer 11 with electron beams 31, and making a projection unit...
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6034767 |
Monochromator and optical analyzing device using the same
A monochromator according to the present invention has an arm 1 rotatably mounted on a rotation shaft 3, and a diffraction grating 6 is fixed to the arm 1. The arm 1 is rotated by a linear motor 9...
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6031608 |
Spectroscopic instrument with offset grating to improve focus
In a spectroscopic instrument having a spherical grating to disperse incident light into a spectrum, the grating is oscillated on axis to scan the light passing through an exit slit through the...
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5991049 |
Transparent substrate having rain sensor
A front windshield 1 having a rain sensor 2 for detecting the adhesion or presence of water drops W upon one side surface thereof, depending upon variation in an amount of reflected light, wherein...
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5978110 |
Holographic optical grating and method for optimizing monochromator configuration
This invention comprises a novel apparatus for recording a holographic groove pattern on a diffraction grating blank. The recording apparatus is configured using newly developed groups of...
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5949541 |
Spectrophotometer system
In order to reduce the size of a spectrophotometer having a rotatable diffraction grating and to compensate for longitudinal chromatic aberration and to provide for triangular bandwidth (where the...
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5949578 |
Reflective grating for optical diffraction, and manufacturing methods
A reflective grating for the optical diffraction of light rays comprises k juxtaposed, grooved, plane sub-gratings, the planes of the sub-gratings being offset in terms of height with respect to...
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5898004 |
Polymerized crystalline colloidal array sensors
Novel sensor devices composed of a crystalline colloidal array (CCA) polymerized in a hydrogel are disclosed. The hydrogels are characterized as being capable of shrinking and swelling in response...
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5889588 |
Random wavelength access monochromator incorporating coaxial off-axis parabolic OAP reflectors
A random wavelength access monochromator incorporates a pair of coaxial off-axis parabolic reflectors configured so that the spherical aberrations introduced by the reflectors cancel each other....
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5886785 |
Optical spectrum analyzer and process for analyzing the corresponding spectrum
The invention relates to an optical spectrum analyzer of an incident light beam (101) and a process for analyzing the corresponding spectrum. The spectrum analyzer comprises addressing means (1), a...
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5861949 |
Atomic absorption spectrophotometer
Turning on a hollow cathode lamp of an objective element, the intensity of the light is measured while scanning the wavelength within a predetermined range centering around the resonance line of...
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5856870 |
Spectroanalytical system
A spectroanalytical system includes entrance aperture defining structure for receiving radiation to be analyzed along a first path; dispersion structure in the first path for spatially dispersing...
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5828061 |
Apparatus for detecting a rotation angle of a diffraction grating
In order to improve the accuracy of the absolute value of a wavelength of diffraction light in a diffraction grating, a gas absorption line resulting from an absorption cell 8 is used as a...
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5828452 |
Spectroscopic system with a single converter and method for removing overlap in time of detected emissions
A spectroscopic system that processes spatially dispersed electromagnetic emissions at a number of wavelengths from a test material. The spectroscopic system includes a converter that generates an...
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5812262 |
Waveguide for radiation detection system
An ultra violet radiation detector comprises a slice of silica (10) having an entrance slit (18) from which radiation diverges to a curved reflective face (20, 22) which reflects it to a planar...
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5767965 |
Apparatus and method for driving diffraction gratings
A grating drive apparatus for use in a multiple-grating spectrometer is provided. The spectrometer has an entrance slit, an exit port, an optical path between the entrance slit and the exit port,...
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5748310 |
Optical spectrum separation apparatus
A high-precision spectrum separation apparatus enables to generate an output beam having a specific wavelength from a multi-wavelength input beam. The input beam is focused on a diffraction grating...
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5739905 |
Spectrophotometer with electronic temperature stabilization
In order to preclude unreliable or inaccurate spectrophotometric measurements which can be caused by thermal effects (expansion/contraction) of components of the spectrophotometer, such as the...
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5710627 |
Wavelength-scanning mechanism and method for spectrometer
A wavelength-scanning mechanism for a spectrometer utilizes an eccentric disc cam driven by a pulse motor to pivot a diffraction grating with a contact bar fixed thereto. A light source supplies...
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