Abstract: A wavelength-conversion system includes a wavelength-conversion target that radiates an energy output when an energy input of a different wavelength is incident upon the wavelength-conversion target. An input structure directs the energy input of the input-energy wavelength to be incident upon the wavelength-conversion target. A target baseline temperature modifier either controllably heats or controllably cools the wavelength-conversion target independently of any heating or cooling effect of the energy input or the energy output. A detector is positioned so that the energy output of the output-energy wavelength emitted from the wavelength-conversion target is incident upon the detector.

Abstract: A wavelength-conversion system includes a wavelength-conversion target that radiates an energy output when an energy input of a different wavelength is incident upon the wavelength-conversion target. An input structure directs the energy input of the input-energy wavelength to be incident upon the wavelength-conversion target. A target baseline temperature modifier either controllably heats or controllably cools the wavelength-conversion target independently of any heating or cooling effect of the energy input or the energy output. A detector is positioned so that the energy output of the output-energy wavelength emitted from the wavelength-conversion target is incident upon the detector.

Abstract: An optical arrangement includes an infrared imaging system operating in conjunction with a first beam having wavelengths less than 15 microns, and a coherent infrared source generating a second beam having wavelengths shorter than the first beam wavelengths. Also provided is an objective lens arrangement including an objective lens having an aperture formed in one side of the objective lens. A partially reflective member is located between the objective lens arrangement, and the imaging system and infrared source. A T.V. camera is provided for receiving an image through the objective lens aperture. The first beam is directed to the imaging system from a region being imaged, and the second beam is directed from the infrared source to the region being imaged. The respective beams are directed to the partially reflective member so as to cause the respective beams to pass through the objective lens along substantially the same optical path as each other.

Abstract: A LIDAR scanning system having a rotating multifaceted polygon mirror for transmitting modulated light from one of its facets to a surface. Diffuse light reflected off said surface is received by another facet of the polygon mirror and reflected to a photo detector. The phase difference between the transmitted and received light is then used to compute the range of the surface from the scanning system. The intensity of the returned light is used to create a gray scale image of the surface. The use of separate optical paths for the transmitted and returned light, and a small scanned field of view results in an improved signal-to-noise ratio.

Abstract: In a radiation-utilizing measurement system including a rotatable reflector, a point source, and a point detector, there being a plane both at right angles to the rotational axis and including the source and the detector, the plane also including the optic axis of the system extending equidistant between the source and the detector, and there being a plane including the rotational axis and the optic axis, there is provided a refracting element with zero power in the first plane, and a finite positive power in the second plane; or, at least the equivalent of, two refracting elements, the second refracting element having zero power in the second plane, and a finite positive power in the first plane. Thereby, respectively, the effects caused by reflector fluctuation; and also the effects caused by reflector rotation, when the source provides a conically divergent beam of radiation; are obviated.