Abstract: A lamp assembly comprised of a waterproof casing, a lamp disposed within the casing, and a source of electrical current electrically connected to the lamp, from the source to the lamp. The lamp, when operated with a 12 volt power supply, consumes less than 40 watts The preferred lamp used in the assembly is described and claimed in U.S. Pat. No. 5,418,419.

Abstract: An integral lamp for producing a spectral light distribution substantially identical in uniformity to the spectral light distribution of a desired daylight with a color temperature of from about 3250 to about 10,000 degrees Kelvin throughout the entire visible light spectrum from about 380 to about 780 nanometers. The lamp contains a enclosed lamp envelope having an interior surface and an exterior surface, a light producing element which emits radiant energy throughout the entire visible spectrum with wavelengths from about 200 to about 2,000 nanometers at non-uniform levels of radiant energy across the visible spectrum, and at least one coating on at least one of said surfaces and having a transmittance level in substantial accordance with the formula D(L)=[O(L)−F(L)×S(L)]/[S(L)×{1−F(L)}], wherein: 1.

Abstract: A lamp assembly comprised of a waterproof casing, a lamp disposed within the casing, and a source of electrical current electrically connected to the lamp, from the source to the lamp. The lamp, when operated with a 12 volt power supply, consumes less than 40 watts The preferred lamp used in the assembly is described and claimed in U.S. Pat. No. 5,418,419.

Abstract: A process for illuminating an object with a first spectrally distinct area. In the first step of the process, the spectral reflectivity of a first spectrally distinct area is determined, and that wavelength portion(s) of the spectrally distinct area that reflects more light form a light source than absorbs it (and the extent to which it does so) is identified. Thereafter, the maximum reflectivity of such wavelength portion, after illumination by the light source, is identified, and one also identifies that segment of the first wavelength portion which has a reflectivity of less than a specified percentage of the maximum reflectivity. A digitized image is then prepared which is modified to delete the low reflectivity segment of the first wavelength portion. The modified digital image is then fixed onto a medium (which may be, e.g., a color slide), the medium is illuminated with the light source, and the light image thus produced is projected onto the object.

Abstract: A lamp for producing a spectral light distribution which is substantially identical in uniformity to the spectral light distribution of a desired daylight throughout the entire visible light spectrum from about 380 to about 780 nanometers. The lamp contains a lamp envelope comprised of an exterior surface, a light-producing element substantially centrally disposed within said lamp envelope, a reflector around the light-producing element, and an aperture assembly in front of the light-producing element.

Abstract: A lamp for producing a spectral light distribution which is substantially identical in uniformity to the spectral light distribution of a desired daylight throughout the entire visible light spectrum from about 380 to about 780 nanometers. The lamp contains a lamp envelope comprised of an exterior surface, a light-producing element substantially centrally disposed within said lamp envelope, and a coating on said exterior surface of said lamp envelope.

Abstract: An electronic apparatus for producing a wide variety of spectral outputs comprising at two dissimilar light sources, a source of alternating current, a means for specifying the desired spectral output, electronic means for varying the alternating current delivered to the first light source to produce a first spectral output, and electronic means for varying the alternating current delivered to the second light source to produce a second spectral output, which when combined with the first spectral output produces an overall light output meeting desired characteristics of illuminance and/or color temperature.

Abstract: A lamp for producing a spectral distribution which is substantially identical to daylight color temperature. The lamp contains a filament which, when excited by electrical energy, emits radiant energy at least within the visible spectrum with wavelengths from about 400 to about 700 nanometers, a reflector body with a surface to intercept and reflect the visible spectrum radiant energy which is positioned within the reflector so that at least 50 percent of the visible spectrum radiant energy is directed towards the reflector surface, and a coating on the surface of the reflector body from which the reflected radiance of each wavelength of visible spectrum radiant energy directed towards the reflector surface when combined with the visible spectrum radiant energy not directed towards the reflector surface produces a total light output in substantial accordance with a specified formula.

Abstract: An apparatus for generating a spectral distribution. This apparatus contains a light source and a single filter. The single filter is comprised of a color correcting filter material and a neutral density filter material. When the apparatus is adjusted, the spectral distribution of the light which passes through it varies continuously, but the brightness and/or irradiance of such light is substantially constant.

Abstract: An apparatus for generating a spectral distribution. This apparatus contains a light source and a single filter. The single filter is comprised of a color correcting filter material and a neutral density filter material. When the apparatus is adjusted, the spectral distribution of the light which passes through it varies continuously, but the brightness and/or irradiance of such light is substantially constant.

Abstract: An apparatus for providing a light distribution which can simulate any desired lighting condition such as, for example, daylight, blackbody radiation, and the like. The apparatus contains a lighting source which provides polychromatic light. The polychromatic light is then dispersed into its constituent frequencies, the dispersed light is then selectively attenuated, and the selectively attenuated light is then converted into light composed of randomized spectral frequencies.

Abstract: An apparatus for producing spectrally different light distributions which have the same irradiance is disclosed. This apparatus contains a light source and an adjustable, opto-mechanical filter means. The filter means contains an adjustment means for simultaneously varying the spectral distribution of light passing through the filter while maintaining the flux of the light at a substantially constant irradiance level.

Abstract: Apparatus for exposing photographic materials, for example, film or paper, for testing its response to various wavelengths of light at various intensities. The apparatus include an elongate housing divided by baffles into a plurality of compartments. One compartment contains a source of light of constant intensity and color temperature. Remotely disposed in the housing are means for mounting the film for exposure and includes a step wedge. Other compartments include filters for modifying the intensity and color of the light passing from the source to the film through apertures in the baffles; a strobe as an alternative source of light; a shutter for controlling flow of light from the source; and a spectroradiometer for analyzing the light and maintaining its intensity and color temperature constant.

Abstract: A source of illumination of constant color temperature and intensity including a lamp the color temperature of the light from which is dependent on the power applied to the lamp. There is a device for measuring the intensity of portions of the spectrum of the light and for providing signals indicative of those intensities. Means responsive to the signals adjust the power to achieve the selected color temperature. A light modulator adjusts the intensity without affecting color temperature. There is a spherical mirror centered on the lamp and the modulator is located between the lamp and the mirror and controls the brightness of the image of the lamp formed on the lamp by the spherical mirror.

Abstract: There is disclosed a variable brightness light generator embodied in apparatus for exposing photographic film for test purposes. The generator includes a spherical mirror, a lamp at the center of the spherical form of the mirror and a modulator located between the lamp and the mirror for modulating the brightness of the image of the lamp created on the lamp by the mirror. The intensity of the light issuing from the lamp is sensed by a spectroradiometer which produces signals used in controlling the modulator whereby the intensity may be kept constant. The color temperature of the lamp is controlled under the influence of signals from the spectroradiometer. The exposing apparatus also includes a plurality of filters selectively insertable in the light path for modifying the intensity and color of the light incident on the film.