Abstract:
A color measurement instrument is used as a shade card generator and printer. Spectral geometries of D/8, D/0, 45/0, 0/45, D(hemisphere)/8, D(hemisphere)/0 or others are applied. The light spectrum of the illumination source (2) lies in the range of 350 - 1100 nm. An integrating sphere (3) is used in the case of D/8 geometry. A detector (7.5) and an optical assembly (7.2, 7.3, 7.4) using a variable sample aperture are between the light source (2) and the sample.
Abstract:
A method and a device for detecting the hue and density of a multicolor sheet, the method comprising the steps of linearly radiating white light (3) from a light source (2) onto the surface of a printing sheet (1) multicolored while running in an offset printing machine (100) over the lateral length thereof, dispersing the light at each point of the linear light (4) provided as the reflected light of the radiated white light in order by reflection, diffraction, and reflection in a spectroscope (5) to distribute the light into light spectra spread and dispersed generally at the same rate in a vertical or generally vertical direction relative to the light path thereof, transforming the distributed light spectra into electric signals by using a CCD camera (6) and transferring the electric signals to a calculation device (7), and calculating the electric signals by the calculation device (7).
Abstract:
The present invention relates to spectral analysis systems and methods for determining physical and chemical properties of a sample by measuring the optical characteristics of light emitted from the sample. In one embodiment, a probe head (100) for use with a spectrometer includes a reflector (118) for illuminating a sample volume (150) disposed circumferentially about the light source (140) of the probe head. In another embodiment, a probe head includes an optical blocking element for forcing the optical path between the light source and an optical pick-up optically connected to the spectrometer into the sample. The probe head also includes a reference shutter for selectively blocking light emitted from the sample from reaching the optical pick-up facilitate calibration of the spectrometer.
Abstract:
A spectrophotometer measures the color properties of a sample by illuminating the sample with a light source. One or more light beams are sensed by an active pixel diode array where each of the beams are sensed by a different array of diodes in the active pixel sensor. Each of the diode arrays are formed n the same substrate by a CMOS process such that each diode array is automatically aligned to each other during formation. Subsequent mechanical alignment is, thus, eliminated.
Abstract:
The invention relates to a grating optical sensor comprised of a lens (1) that reproduces an object space, of a diffractive hexagonal 3D grating optical modulator (4) in the image plane (5) of the lens (1), of a photoelectric receiver device (8), which is arranged in the near field behind the modulator (4) in accordance with the centrosymmetrically trichromatic diffraction orders (R, G, B), and of an evaluation device for the electrical signals generated by the individual receivers (8). The invention is characterized in that at least one light diffusion glass (9) is arranged in the pupillary plane of the lens (1) or in a pupillary plane conjugate thereto. The inventive sensor is used for conducting chromatometries with a color constancy performance via a thermal radiation source (17), which modifies the grating constants of the 3D grating (4) for a new white standard value.
Abstract:
A spectral bio-imaging method for enhancing pathologic, physiologic, metabolic and health related spectral signatures of an eye tissue, the method comprising the steps of: (a) providing an optical device for eye inspection being optically connected to a spectral imager; (b) illuminating the eye tissue with light via the iris, viewing the eye tissue through the optical device and spectral imager and obtaining a spectrum of light for each pixel of the eye tissue; and (c) attributing each of the pixels a color or intensity according to its spectral signature, thereby providing an image enhancing the spectral signatures of the eye tissue.
Abstract:
A spectrophotometer which is highly manufacturable at minimum cost nevertheless provides precision of measurement of spectra components of light which is projected therein by maintaining precise optical alignment of optical and electrical components thereof. These components are mounted in a module (16) which is contained in a housing having an entrance aperture (18) which defines an object area for light the spectrum of which is measured by a photodetector (44) in the module (16) at an image area. The module has a base plate provided by a printed circuit board (66) on which a closed wall (74) encompasses an area (a corral) on one side of the circuit board (66). The wall (74) is a one piece structure which extends to the vicinity of the edge of the board (66). It is assembled with the board (66) as a unitary structure so that the assembly is made torsionally rigid and resists bending in the plane of the board (66). The assembly also distributes compressive stress over the entire board (66). The module (16) may be sufficiently small size so as to be located in a housing which is hand held, thereby providing a hand-held spectophotometer.
Abstract:
A hyperspectral imaging system and method are presented for use in reconstruction of spectral data of an object. The system comprises: a pixel matrix of a detector; a tunable dispersive unit in front of the pixel matrix; and a control system. The control system comprises: a controller for tuning the dispersive unit during n image acquisition sessions to provide n different partially overlapping spectral transmission profiles of the dispersive unit; and a control unit which is in data communication with the detector and is configured and operable for processing n image data pieces generated by the pixel matrix in said n image acquisition sessions respectively, each being indicative of a spectral image detected by the pixel matrix and corresponding to the different spectral transmission profile of the dispersive unit, and determining the reconstructed spectral data of the object.
Abstract:
Spectrocolorimetric device includes a light source, a light-receiving unit, a calculation unit, a storage unit, an acquisition unit, and a conversion unit. The light-receiving unit spectroscopically disperses reflected light generated on a surface and measures a spectroscopic spectrum relating to the reflected light. The calculation unit calculates a first spectral reflectance from the spectroscopic spectrum. The storage unit stores relationship information indicating a relationship between a reflectance and a reflectance difference for each wavelength. The acquisition unit acquires reflectance difference for each wavelength between the first spectral reflectance acquired using the spectrocolorimetric device and a second spectral reflectance acquired using a destination-of-conversion spectrocolorimetric device on the basis of the first spectral reflectance and the relationship information. The conversion unit converts the first spectral reflectance into the second spectral reflectance by adding or subtracting the reflectance difference for each wavelength acquired by the acquisition unit to or from the first spectral reflectance.
Abstract:
A lighting device that emits illumination light from two or more angular directions onto a sample surface to be measured, an imaging optical lens, and a monochrome two-dimensional image sensor are provided. This configuration provides a method and an apparatus that take a two-dimensional image of the sample surface to be measured at each measurement wavelength and accurately measure multi-angle and spectral information on each of all pixels in the two-dimensional image in a short time. In particular, a multi-angle spectral imaging measurement method and apparatus that have improved accuracy and usefulness are provided.