Abstract:
A system (10) provides white light having a selectable spectral characteristic (e.g. a selectable color temperature) using an optical integrating cavity (11) to combine energy of different wavelengths from different sources with white light. The cavity has a diffusively reflective interior surface and an aperture (17) for allowing emission of combined light. Control of the intensity of emission of the sources sets the amount of primary color light of each wavelength added to the substantially white input light output and thus determines a spectral characteristic of the white light output through the aperture. A variety of different elements may optically process the combined light output, such a deflector, a variable iris, and a lens a variable focusing lenses system, a collimator, a holographic diffuser and combinations thereof.
Abstract:
A desired color of illumination of a subject is achieved by determining settings for color inputs and applying those setting to one or more systems that generate and mix colors of light, so as to provide combined light of the desired character. In the examples of appropriate systems, an optical integrating cavity diffusely reflects light of three or more colors, and combined light emerging from an aperture of the cavity illuminates the subject. System settings for amounts of the different colors of the input lights are easily recorded for reuse or for transfer and use in other systems.
Abstract:
Systems and methods for providing spectral measurements are described. In one embodiment, a spectral measuring device comprises at least one radiation source configured to provide N (N ≥ 2) linearly independent illuxninant sources characterized by M (M ≥ N) wavelength channels in a predetermined wavelength range; a sensor unit including at least one sensor, configured to be in optical communication with the radiation sources and an object; a memory storing an illuminant characterization matrix including spectral characteristics of the N illuminant sources in the M wavelength channels; and a processor configured to provide spectral responses of the object in the M wavelength channels, based at least in part on the illuminant characterization matrix. The embodiments of the invention can be used to construct a new class of compact spectral measuring devices, such as handheld color measuring devices.
Abstract:
The disclosure relates to a method and apparatus for a compact birefringent interference imaging spectrometer. More specifically, the disclosure relates to a portable system for obtaining a spectrum of a sample. The portable system may include a first photon emission source for illuminating the sample with a first plurality of photons to thereby produce photons scattered by the sample; an optical lens for collecting the scattered photons; a filter for receiving the collected scattered photons and providing therefrom filtered photons; a first photon detector for receiving the filtered photons and obtaining therefrom a spectrum of the sample; and a rejection filter for blocking the photons from said first photon emission source from entering said first photon detector. The disclosure additionally relates to methods of using such portable systems.
Abstract:
A hand-held spectral analyser comprises a spectrometer module (2) including a spectrometer for determining the spectral composition of incident light and a measurement module (4) for delivering light to be measured to the spectrometer module (2). The two modules are adapted for removable rigid attachment to one another to allow the analyser to be operated in one hand. The spectrometer module (2) comprises a battery, microprocessor, display (12), control keyboard (14) and entry optics (7) for the internal spectrometer optical assembly. Various measurement modules may be fitted to the spectrometer module, such as an absorbance meter, fluorimeter, radiometer or colour measurement module. The measurement module may include a light source and a cuvette to contain a liquid sample. The measurement module may include a flow-through sample cell comprising a fluid inlet and a fluid outlet to facilitate a short path length for light transmitted through opaque samples.
Abstract:
A system which enables electronic communication, coordination and dissemination of color-related designs, specifications and products. Color production and maintenance in a simultaneous fashion is provided between a plurality of disparate parties in substantially "real time." The present integrated color-production is capable of importing electronic output from many diverse instruments, including color production-related hardware and software, and further uses the output to automatically deliver product data to and from a plurality of geographically disbursed parties. The present invention also provides an electronic library comprising colors and textures to be used for accurately matching a color sample and/or specification. The integrated, on-line color-related production system of the present invention enables parties to operate at peak efficiency, producing high sales and customer satisfaction.
Abstract:
A spectroscopic device (10) comprising an optical fiber bundle (12) having its output end (12a) arranged in a vertical direction, a slit (16) provided so as to face the output end (12a) of the optical fiber bundle (12), a spectroscopic element arranging means (20) capable of arranging, on the optical path of light output from the output end (12a) of the bundle (12) and passed through the slit (16), a first diffraction grating (23) provided with a groove extending along a vertical direction at a specified line dispersion horizontally and a second diffraction grating (24) provided with a groove extending along a vertical direction at a line dispersion larger than that for the first diffraction grating (23) horizontally so as to enable switching between the diffraction gratings, and a photomultiplier (30) comprising a plurality of horizontally−arranged rows of anodes (53) extending along a vertical direction.