| Document |
Document Title |
|
WO/1991/001579 |
A narrow-band oscillation excimer laser that can be suitably used as a source of light of a reduced projection exposing device for producing semiconductor devices, and a wavelength detector. In this laser, the direction along the lines o...
|
|
WO/1990/014582 |
A wavelength detector in which reference light (31) generated in a reference light source (30) and light (11) to be detected are directed to an etalon (62), and the light that has transmitted through the etalon is detected by light detec...
|
|
WO/1990/012999 |
A method and apparatus for determining the quality of a multimode laser beam (10). In the preferred embodiment, the apparatus includes a lens (32) for creating a transformed or imaged waist from the imput beam. The locations of the trans...
|
|
WO/1990/012294 |
A spatial heterodyne spectrometer has a two beam dispersive interferometer (25) which includes a diffraction grating (45) as a beam splitter/combiner. An incoming beam is collimated and passed to the grating (45) in the interferometer (2...
|
|
WO/1990/010842 |
A single beam interferometer (10) comprises an intensity modulated laser beam (16) having a focus area for heating a test area (18) on the surface of a sample (12) producing a thermal bump (20). An unfocused probe laser beam (30) is dire...
|
|
WO/1990/010191 |
A polarization interferometer comprises a light source (1), a collimator (2), a first polarization element (3), a system of double-refracting elements (4, 5, 6) and a second polarizing element (7) which polarizes the light emerging from ...
|
|
WO/1990/009718 |
An electromagnetic imager device can detect electromagnetic images, for example, in the infrared, millimeter and microwave wavelengths and convert these images into useful wavelengths which imaging devices, such as a camera, can record. ...
|
|
WO/1990/009003 |
An apparatus and method to determine the concentration of an absorptive constituent in a scattering medium. A light source (10) is coupled to a scattering medium (20) and is detected by a detector (16) after migrating through the medium....
|
|
WO/1990/008305 |
An arrangement for measuring the line width or spectrum of laser diodes comprises a glass fibre (3) for receiving the Rayleigh backscatter, coupled by an optical coupling element (1) to a laser diode (2) and to a coupler (5). The glass f...
|
|
WO/1990/005282 |
An all optical fibre interferometer is formed from an optical fibre Mach-Zehnder interferometer (25) whose output ports (18, 20) are coupled by an optical fibre loop (20) which relaunches any optical signal output from either of the outp...
|
|
WO/1990/002930 |
An interferometric procedure, such as electronic speckle pattern interferometry, involves generating two signals representing the point-by-point variations in intensity of respective patterns of electromagnetic radiation resulting from t...
|
|
WO/1989/009380 |
A heterodyne interferometer to achieve simultaneous and independent measurements of amplitude and phase includes a beam splitting device (BS) which splits of the incident light beam into two parts with equal amplitudes and an angular dev...
|
|
WO/1989/008825 |
An arrangement for determining the wavelength of light beams in a medium or the refractive index of the medium comprises at least two stationary measuring bodies (11a, 11b, 11c) of different length each of which determines a different ge...
|
|
WO/1989/007756 |
In an integrated optical interference method, polarized laser light (3e) is input into a planar waveguide (1/2) in which it is propagated as a guided wave (3) consisting of two mutually coherent orthogonally polarized modes. The light in...
|
|
WO/1989/005956 |
A detection system is provided which has a very wide linear dynamic range (for a typical laser, fifteen orders of magnitude), as well as a high sensitivity (shot noise limited), high angular resolution (diffraction limited), and which is...
|
|
WO/1989/003516 |
Laser interferometer system in use for taking measurements on a machine. Optical devices (14, 16) such as interferometers, reflectors and beam splitters are required to be mounted on the machine spindle (3) or the machine bed (2). It is ...
|
|
WO/1989/002068 |
A method and an apparatus for detecting the wavelength of a laser beam by utilizing an optogalvano effect based upon atoms or molecules in the plasma. Atoms or molecules in the plasma are irradiated with a laser beam. The impedance of th...
|
|
WO/1989/001644 |
A self-tuning optical notch filter is employed to separate coherent from noncoherent radiation in an overall beam. The presence of coherent radiation is detected, preferably with an interferometer, and the frequency of the detected coher...
|
|
WO/1989/001612 |
In a optical detection system a plurality of photo-diode detectors are placed in an enclosure. The enclosure has an aperture through which is directed a light beam to be analysed. To eliminate the effect which ambient light entering the ...
|
|
WO/1989/000654 |
A fuel control device comprises a throttle valve unit (36) for throttling fuel flow to a burner (35), and a selector (37) operatively interconnected to the throttling fuel flow to a burner (35), and a selector (37) operatively interconne...
|
|
WO/1989/000281 |
In a transillumination imaging system in which a body (H) is illuminated by transparency by a beam of light (FS, F1), a beam splitter (S1) derives from this beam (FS) a beam fraction (F'1) whose frequency is shifted by a frequency change...
|
|
WO/1989/000278 |
In an imaging process and system by transillumination of a medium (H) illuminated by transparency by a beam (F1), an acoustic transducer (TA1) emits an acoustic wave in the medium (H) which interferes with the beam (F1). The frequency of...
|
|
WO/1988/009488 |
A wavefront sensor (10) for use in determining a phase error of an input beam (16) is disclosed. The wavefront sensor (10) includes mechanisms for obtaining a sample of an input beam (16). A mechanism (18) for splitting the beam (16) int...
|
|
WO/1988/008519 |
The device comprises : a laser device (10, 20) for the frequency n1 (11) and the frequency n2 (21), each provided with a polarizing beam splitter (12, 22) for producing crossed polarized partial beams of frequency n1 (13, 14) and n2 (23,...
|
|
WO/1988/008121 |
A wavelength-independent-interferometer comprises means to receive light (10) from a field of view, means (BS1) to separate the light into two beams (11, 12), means (BS2) to combine the two beams, and dispersive means (30) interposed in ...
|
|
WO/1988/006302 |
An electro-optical device (10) is used to alter characteristics of a light beam passing through it. In a particularly preferred embodiment, the device (10) is used as a phase stop having a dynamically variable aperture whose size is defi...
|
|
WO/1988/005903 |
An optical interferometer comprises light source means for producing polarised light signals of predetermined frequency which in operation of the interferometer propagate along optical fibre means and are modulated as by the sensing of a...
|
|
WO/1988/002474 |
A wavelength monitor (25) uses a diffraction grating (35) and a beam splitter (31). Light from a superluminescent diode (SLD) is supplied to the beam splitter (31) and is projected onto the grating (35). The grating is formed by holograp...
|
|
WO/1987/006772 |
Method and apparatus for mounting an interferometer cavity such as a laser so that constant interferometer resonant frequency is maintained in spite of environmental vibration and other external acceleration forces. The invention can be ...
|
|
WO/1987/004529 |
A method and apparatus for reducing fluctuations such as phase noise in a characteristic of a coherent beam of radiation. The apparatus comprises an interferometer (5) for sensing the fluctuation at the first position to generate an inte...
|
|
WO/1987/003683 |
A shearing phase difference sensor including a high energy laser source for generating adjacent coherent light beams. Samples of the beams are extracted by an extracter and directed to an optical modifier. The optical modifier, positione...
|
|
WO/1987/002785 |
An adaptive laser system (10) includes an adaptable laser (12), a waveform sensor (14), an amplitude distribution sensor (16), and a processor (18) for converting data from the sensors into commands for controlling the waveform of a lase...
|
|
WO/1987/002768 |
An adaptive laser system (10) incorporates a laser (12) and a novel system and method for determining the slope distribution of a laser beam wavefront. The sensor comprises a ramp filter (16) with a continuous monotonically varying trans...
|
|
WO/1987/001438 |
A common optical path interferometric gauge comprises an optical beam (14) that is split into two beams. Both beams are modulated and recombined after introducing an optical path length difference greater than the coherence length of the...
|
|
WO/1986/007162 |
A spectral analyzer and direction indicator system (10) includes optical channels (20, 30, 40) for providing detected optical information indicative of incidence direction and spectral content of incident radiation. Each optical channel ...
|
|
WO/1986/006481 |
An interference polarization refractometer comprises a polarized emission source (1) and, located consecutively one after another along the emission path, a means for the light beam splitting into two orthogonally polarized light beams, ...
|
|
WO/1986/003844 |
Spectral analyzer and direction indicator systems (10, 20, 30, 40, 50) include optical elements (11, 17, 27b, 33b, 35b, 39b) for providing optical information which depend on incidence direction and spectral content, and further includes...
|
|
WO/1986/001301 |
A spectral analyzer and direction indicator (10, 20) and includes reflection gratings (13, 15, 25, 27, 37, 39), associated optical systems (17, 19, 29, 33, 41, 45) and associated detectors (21, 23, 31, 35, 43, 47, 30). The reflection gra...
|
|
WO/1985/003122 |
An interferometric spectrometer utilizing a multiple array detector (22). When the spectrometer utilizes visible light a photodiode array detector (22) is utilized and a fixed tilted mirror (17) and vertical mirror (16) in combinations w...
|
|
WO/1985/000221 |
An optical interferometer matrix which includes a reference waveguide (10) for optically transmitting a reference signal. The optical interferometer matrix further includes a signal source waveguide (12) for optically transmitting a sour...
|
|
WO/1984/003558 |
An improved mirror scan control for driving a movable mirror (14) in an interferometer with a constant scan velocity comprises a closed loop servo control which provides constant velocity mirror scan in response to a phase comparison of ...
|
|
WO/1983/003685 |
A closed loop optical fiber interferometer is used in sensing a quantity, Q, by applying a time varying or modulated measure of, Q, asymmetrically to the closed loop (72) and detecting phase shift between two counterpropagating optical s...
|
|
WO/1981/001466 |
Method and apparatus for measuring the frequency of radiation comprising a pair of filters (2, 3) or a beam splitter (30) responsive to radiation from a source of radiation (4) for providing a first output having a magnitude which increa...
|
|
WO/1981/000299 |
An interference spectrometer in which a wedge-shaped prism (32) is moved across one arm (22) of an interferometer for variation of the path difference, and where the beam splitter substrate (36) and prism (32) are optically compensated f...
|
|
JP2012015532 |
To provide an apparatus and a source arrangement for filtering an electromagnetic radiation.An apparatus and source arrangement for filtering an electromagnetic radiation includes at least one spectral separating arrangement configured t...
|
|
JP2011242345 |
To achieve a device and a method for accurately measuring spectral line width of a laser beam to be measured and for obtaining a beat signal with high SN ratio by suppressing saturation of a photodetector and reducing excessive noises in...
|
|
JP2011221043 |
To overcome the source availability and scan speed shortcomings of conventional low coherence interferometry and optical coherence tomography.An apparatus comprises: at least one first arrangement providing at least one first electromagn...
|
|
JP2011215003 |
To precisely measure wavefront even if the density of a scatterer near a focal plane is low.The wavefront measurement method includes: a contrast measurement step S2 which measures contrast of the interference pattern corresponding to re...
|
|
JP2011215164 |
To overcome the defect of low coherence interference measurement and the serviceability and scanning speed of the light source of optical coherent tomography.A system for calculating the specific data related to at least one of the struc...
|
|
JP2011215165 |
To overcome a defect of low coherence interference measurement and the serviceability and scanning speed of the light source of optical coherent tomography.This apparatus includes at least one first arrangement for providing not only at ...
|
