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Title: Multichannel optical sensing device

Abstract

A multichannel optical sensing device is disclosed, for measuring the outr sky luminance or illuminance or the luminance or illuminance distribution in a room, comprising a plurality of light receptors, an optical shutter matrix including a plurality of liquid crystal optical shutter elements operable by electrical control signals between light transmitting and light stopping conditions, fiber optic elements connected between the receptors and the shutter elements, a microprocessor based programmable control unit for selectively supplying control signals to the optical shutter elements in a programmable sequence, a photodetector including an optical integrating spherical chamber having an input port for receiving the light from the shutter matrix and at least one detector element in the spherical chamber for producing output signals corresponding to the light, and output units for utilizing the output signals including a storage unit having a control connection to the microprocessor based programmable control unit for storing the output signals under the sequence control of the programmable control unit.

Inventors:
 [1]
  1. (Piedmont, CA)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
867330
Patent Number(s):
US 4915500
Assignee:
United States of America as represented by Department of Energy (Washington, DC) LBNL
DOE Contract Number:
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
multichannel; optical; sensing; device; disclosed; measuring; outr; sky; luminance; illuminance; distribution; comprising; plurality; light; receptors; shutter; matrix; including; liquid; crystal; elements; operable; electrical; control; signals; transmitting; stopping; conditions; fiber; optic; connected; microprocessor; based; programmable; unit; selectively; supplying; sequence; photodetector; integrating; spherical; chamber; input; receiving; detector; element; producing; output; corresponding; units; utilizing; storage; connection; storing; optical sensing; selectively supplying; output signals; control signal; fiber optic; output signal; sensing device; control signals; control unit; liquid crystal; signals corresponding; storage unit; light transmitting; detector element; photodetector including; elements connected; programmable control; sequence control; multichannel optical; optic element; optical integrating; detector including; channel optical; /356/

Citation Formats

Selkowitz, Stephen E. Multichannel optical sensing device. United States: N. p., 1990. Web.
Selkowitz, Stephen E. Multichannel optical sensing device. United States.
Selkowitz, Stephen E. Mon . "Multichannel optical sensing device". United States. doi:. https://www.osti.gov/servlets/purl/867330.
@article{osti_867330,
title = {Multichannel optical sensing device},
author = {Selkowitz, Stephen E.},
abstractNote = {A multichannel optical sensing device is disclosed, for measuring the outr sky luminance or illuminance or the luminance or illuminance distribution in a room, comprising a plurality of light receptors, an optical shutter matrix including a plurality of liquid crystal optical shutter elements operable by electrical control signals between light transmitting and light stopping conditions, fiber optic elements connected between the receptors and the shutter elements, a microprocessor based programmable control unit for selectively supplying control signals to the optical shutter elements in a programmable sequence, a photodetector including an optical integrating spherical chamber having an input port for receiving the light from the shutter matrix and at least one detector element in the spherical chamber for producing output signals corresponding to the light, and output units for utilizing the output signals including a storage unit having a control connection to the microprocessor based programmable control unit for storing the output signals under the sequence control of the programmable control unit.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}

Patent:

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  • A multichannel optical sensing device is disclosed, for measuring the outdoor sky luminance or illuminance or the luminance or illuminance distribution in a room, comprising a plurality of light receptors, an optical shutter matrix including a plurality of liquid crystal optical shutter elements operable by electrical control signals between light transmitting and light stopping conditions, fiber optical elements connected between the receptors and the shutter elements, a microprocessor based programmable control unit for selectively supplying control signals to the optical shutter elements in a programmable sequence, a photodetector including an optical integrating spherical chamber having an input port for receivingmore » the light from the shutter matrix and at least one detector element in the spherical chamber for producing output signals corresponding to the light, and output units for utilizing the output signals including a storage unit having a control connection to the microprocessor based programmable control unit for storing the output signals under the sequence control of the programmable control unit.« less
  • A multichannel optical sensing device is presented, for measuring the outdoor sky luminance or illuminance or the luminance or illuminance distribution in a room, comprising light receptors, an optical shutter matrix including liquid crystal optical shutter elements operable by electrical control signals between light transmitting and light stopping conditions, fiber optic elements connected between the receptors and the shutter elements, a microprocessor based programmable control unit for selectively supplying control signals to the optical shutter elements in a programmable sequence, a photodetector including an optical integrating spherical chamber having an input port for receiving the light from the shutter matrixmore » and at least one detector element in the spherical chamber for producing output signals corresponding to the light, and output units for utilizing the output signals including a storage unit having a control connection to the microprocessor based programmable control unit for storing the output signals under the sequence control of the programmable control unit.« less
  • A non-linear optical crystal vibration sensing device (10) including a photorefractive crystal (26) and a laser (12). The laser (12 ) produces a coherent light beam (14) which is split by a beam splitter (18) into a first laser beam (20) and a second laser beam (22). After passing through the crystal (26) the first laser beam (20) is counter-propagated back upon itself by a retro-mirror (32), creating a third laser beam (30). The laser beams (20, 22, 30) are modulated, due to the mixing effect within the crystal (26) by vibration of the crystal (30). In the third lasermore » beam (30), modulation is stable and such modulation is converted by a photodetector (34) into a usable electrical output, intensity modulated in accordance with vibration applied to the crystal (26).« less
  • A turbocharger control device for use in conjunction with an internal combustion engine, is described which consists of: a turbine operatively connected to an exhaust manifold of the engine to be driven to rotate by exhaust gases; a centrifugal compressor; a shaft connecting the compressor for rotation with the turbine; a casing surrounding, in part, the compressor and the shaft; photo projecting means positioned adjacent to the shaft within the casing; photo receiving means positioned diametrically opposite the photo projecting means on the opposite side and adjacent to the shaft within the casing; the shaft being provided with a diametricallymore » penetrating hole; light source means; first means for coupling the light source means and the photo projecting means in respect to the transmission of light and for isolating the light source means from the casing in respect to the transmission of vibration and heat, converter means, including a photo-voltage converter; second means for coupling the converter means and the photo receiving means in respect to the transmission of light and for isolating the photo-voltage converter from the casing in respect to the transmission of vibration and heat; the photo-voltage converter generating an electrical signal in response to light pulse signals transmitted from the photo receiving means; control means connected electrically to the converter means for generating a control signal in response to the electrical signal; an actuator operatively connected to the control means for movement in response to the control signal.« less
  • A non-linear optical crystal vibration sensing device including a photorefractive crystal and a laser is disclosed. The laser produces a coherent light beam which is split by a beam splitter into a first laser beam and a second laser beam. After passing through the crystal the first laser beam is counter-propagated back upon itself by a retro-mirror, creating a third laser beam. The laser beams are modulated, due to the mixing effect within the crystal by vibration of the crystal. In the third laser beam, modulation is stable and such modulation is converted by a photodetector into a usable electricalmore » output, intensity modulated in accordance with vibration applied to the crystal. 3 figs.« less