Abstract:
A solar radiation sensor of the type including a case, a filter provided on an upper surface of the case, and a photodetector disposed in the case for detecting the quantity of solar radiation coming through the filter, wherein the filter has a knurled inside surface for irregularly reflecting incident light, and the photodetector has a light-receiving surface extending obliquely at a predetermined angle of inclination whereby a proper sensitivity to oblique incident light can be maintained even when the sensor is mounted on a flat surface.
Abstract:
Apparatus for detecting discontinuities in a radiation diffusing surface (10) such as paper. Radiation is passed to the surface and a radiation collector (19) receives the diffused radiation (18) from a limited area of the surface (10). The radiation collector receives the diffuse radiation from a limited area only and from within predetermined angular limits other than normal to the surface. The radiation collector (19) defines said predetermined angular limits through total internal reflection.
Abstract:
Apparatus for monitoring the intensity of light comprising an optical waveguide having a light-collecting tip end with a diffusing surface which is shaped so that it can collect and transmit light rays into the waveguide. The structure of the tip is such that it is capable of collecting rays which are directed toward the tip from all angles within a 360.degree. arc. The tip may be conical, hemispherical, ellipsoidal or variations of these geometrical forms.
Abstract:
A device for measuring light incident on an optical system comprises an optical system defining an optical path, a plurality of diffraction lattices arranged in the optical path, each of the diffraction lattices comprising a plurality of periodically arranged semireflecting oblique surfaces, and photodetector means for detecting each of the diffracted lights from the diffraction lattices distinctively. The diffraction lattices are each of different predetermined areas; however, when even light is input, each lattice diffracts the same total quantity of light to its respective detector.
Abstract:
A system for measuring incident light includes: an optical system defining an optical path; a photodetector; and a plurality of beam splitters, with each beamsplitter having a different, predetermined area and adapted to be disposed in the optical path with, at any one time, only one beam splitter in the optical path; and means for measuring the light received by the photodetector.
Abstract:
A light collector includes a light sampler for gathering light and a light receiver for receiving the light gathered by the sampler and for transmitting it to a system such as a light illumination control system. The output of the light collector varies with the intensity of the light gathered by the light sampler and can be increased or decreased for a given gathered light intensity by adjusting the distance between the light sampler and light receiver. Accordingly, if the light collector is used to provide to a light illumination control system the actual light intensity of the area in which light illumination is controlled, the light intensity maintained by the control system can be adjusted by increasing or decreasing the output of the collector. Also, the present invention includes a light gathering device for a light collector. The light gathering device includes a lens having angled portions for gathering light from a broad area.
Abstract:
A light energy detector which includes a laser preamplifier coupled to means for converting the amplified light into electrical energy is provided. The detector is capable of detecting 1.06 micron wavelength light and is capable of detecting a minimum signal of approximately 1,000 photons or less at a duration of 50 nanoseconds or less.
Abstract:
A method of assessment of renal function by monitoring a time-varying fluorescence signal emitted from a fluorescent agent from within a diffuse reflecting medium with time-varying optical properties is provided that includes using a renal monitoring system comprising at least one light source, at least one light detector, at least one optical filter, and at least one controller to provide a measurement data set comprising a plurality of measurement entries, each measurement data entry comprising at least two measurements obtained at one data acquisition time from a patient before and after administration of the fluorescent agent.