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Position encoding holographic spectrometer
New Patents changes in the ultrasonic transducers used for transmitting and receiving ultrasonic signals, and half-pitch scanning may be effected by using different numbers of ultrasonic transducers for transmission and reception of the ultrasonic waves.
4832491 METHOD OF AND APPARATUS FOR SPECTROSCOPICALLY ANALYZING SAMPLES Michael R Sharpe, Stephen J Cooke, Newton, United Kingdom assigned to U S Philips Corporation A single beam wavelength scanning spectrophotometer comprises means for passing radiation from a radiation source (1) to a radiation detector (4) over a defined path which includes a monochromator (2) capable of being scanned across a selected wavelength range, means (7) for storing a first set of signals representative of the radiation falling on the radiation detector, the first set of signals being spread across the selected wavelength range to form a first spectral response, means for inserting a sample (3) in the defined path, means for producing a second set of signals representative of the radiation falling on the radiation detector when the sample (3) is inserted in the defined path, the second set of signals being spread across a selected wavelength range to form a second spectral response, and means (7) for calculating the transmittance or absorbance of the sample at desired wavelengths from the first and second spectral responses. The ambient temperature in the region of the radiation detector (5) is monitored (6) and the first and/or second sets of signals are modified in dependence on the ambient temperature when the first and second set of signals are produced.
4834537 POSITION ENCODING HOLOGRAPHIC SPECTROMETER Gerard Hughes
L Rafanelli, Lacy G Cook Aircraft Company
assigned
to
An interferometric spectrometer (20) for determining two-dimensional positional and spectral information of two-dimensional light sources (26) is disclosed. The spectrometer (20) includes a mechanism (28) for splitting a beam source (24) into two beam components (30) and (32). A mechanism (34) and (36) for focusing and cen-
111
tering the pair of beam components (30) and (32) is positioned in the line of projection of the beam components (30) and (32). A mechanism (38) and (40) for reflecting the pair of beam components (30) and (32) is positioned in the line of projection of the two beam components (30) and (32). A detector mechanism (42) for detecting the beam components (30) and (32) is positioned in the line of projection of the two beam components (30) and (32). A mechanism (44) for determining spatial and spectral information of the source (26) is associated with the detector mechanism (42 ). Also disclosed is a method of determining spatial and spectral information of a light source utilizing the spectrometer.
4834539 SPECTROSCOPIC ELLIPSOMETER Jean Le Bris, Marko Senart, France assigned tion
Erman, Quincy Sous to U S Philips Corpora-
A spectroscopic ellipsometer comprises an illumination device having a focal point (F’2) for illuminating a surface of a sample (E) in accordance with a given angle of incidence and a device for analyzing the light reflected from the surface of the sample. The sample support comprises three translation plates (20,30,40) in accordance with three respective directions (T2, T3, Tl). The translations in accordance with the first (Tl) and second (T2) directions make it possible to realise cartographic representations of the sample (E) and the translation in accordance with the third direction (T3) makes it possible to cause a point on the surface of the same (E) to coincide with the focal point (F’2). Two plates (PT2, 12) rotating about the axes 0 1 and 02, respectively, parallel to the first (Tl) and second (T2) directions and intersecting each other at the focal point (F’2) provide the possibility of orienting the sample (E) by means of rotation in two orthogonal planes about the focal point (F’ 2).
4836207 METHOD AND APPARATUS TO MONITOR CHOLESTEROL LEVELS WITH PHOTON CORRELATION SPECTROSCOPY Sven-Eri Bursell, Juan R Serur assigned Beth Israel Hospital Association
to The
4832491 METHOD OF AND APPARATUS FOR SPECTROSCOPICALLY ANALYZING SAMPLES Michael R Sharpe, Stephen J Cooke, Newton, United Kingdom assigned to U S Philips Corporation A single beam wavelength scanning spectrophotometer comprises means for passing radiation from a radiation source (1) to a radiation detector (4) over a defined path which includes a monochromator (2) capable of being scanned across a selected wavelength range, means (7) for storing a first set of signals representative of the radiation falling on the radiation detector, the first set of signals being spread across the selected wavelength range to form a first spectral response, means for inserting a sample (3) in the defined path, means for producing a second set of signals representative of the radiation falling on the radiation detector when the sample (3) is inserted in the defined path, the second set of signals being spread across a selected wavelength range to form a second spectral response, and means (7) for calculating the transmittance or absorbance of the sample at desired wavelengths from the first and second spectral responses. The ambient temperature in the region of the radiation detector (5) is monitored (6) and the first and/or second sets of signals are modified in dependence on the ambient temperature when the first and second set of signals are produced.
4834537 POSITION ENCODING HOLOGRAPHIC SPECTROMETER Gerard Hughes
L Rafanelli, Lacy G Cook Aircraft Company
assigned
to
An interferometric spectrometer (20) for determining two-dimensional positional and spectral information of two-dimensional light sources (26) is disclosed. The spectrometer (20) includes a mechanism (28) for splitting a beam source (24) into two beam components (30) and (32). A mechanism (34) and (36) for focusing and cen-
111
tering the pair of beam components (30) and (32) is positioned in the line of projection of the beam components (30) and (32). A mechanism (38) and (40) for reflecting the pair of beam components (30) and (32) is positioned in the line of projection of the two beam components (30) and (32). A detector mechanism (42) for detecting the beam components (30) and (32) is positioned in the line of projection of the two beam components (30) and (32). A mechanism (44) for determining spatial and spectral information of the source (26) is associated with the detector mechanism (42 ). Also disclosed is a method of determining spatial and spectral information of a light source utilizing the spectrometer.
4834539 SPECTROSCOPIC ELLIPSOMETER Jean Le Bris, Marko Senart, France assigned tion
Erman, Quincy Sous to U S Philips Corpora-
A spectroscopic ellipsometer comprises an illumination device having a focal point (F’2) for illuminating a surface of a sample (E) in accordance with a given angle of incidence and a device for analyzing the light reflected from the surface of the sample. The sample support comprises three translation plates (20,30,40) in accordance with three respective directions (T2, T3, Tl). The translations in accordance with the first (Tl) and second (T2) directions make it possible to realise cartographic representations of the sample (E) and the translation in accordance with the third direction (T3) makes it possible to cause a point on the surface of the same (E) to coincide with the focal point (F’2). Two plates (PT2, 12) rotating about the axes 0 1 and 02, respectively, parallel to the first (Tl) and second (T2) directions and intersecting each other at the focal point (F’2) provide the possibility of orienting the sample (E) by means of rotation in two orthogonal planes about the focal point (F’ 2).
4836207 METHOD AND APPARATUS TO MONITOR CHOLESTEROL LEVELS WITH PHOTON CORRELATION SPECTROSCOPY Sven-Eri Bursell, Juan R Serur assigned Beth Israel Hospital Association
to The