Abstract:
The invention generally relates to optical filters that provide regulation and/or enhancement of chromatic and luminous aspects of the color appearance of light to human vision, generally to applications of such optical filters, to therapeutic applications of such optical filters, to industrial and safety applications of such optical filters when incorporated, for example, in radiation-protective eyewear, to methods of designing such optical filters, to methods of manufacturing such optical filters, and to designs and methods of incorporating such optical filters into apparatus including, for example, eyewear and illuminants.
Abstract:
The invention relates to an assembly and method for detecting different optical wavelengths. The aim of the invention is to provide an assembly and method which do not require any additional process steps during chip production and are thus more cost-effective in the production. The assembly achieves this aim by providing a first photodiode (1) having a first conversion characteristic with regard to optical wavelength and a second photodiode (2) having a conversion characteristic with regard to optical wavelength differing from the first conversion characteristic, both photodiodes being arranged directly adjacent to each other on a semiconductor chip (3).
Abstract:
Provided are an integrating sphere photometer and a measuring method of the same. The integrating sphere photometer includes a plurality of photodetectors, an integrating sphere having through-holes formed to correspond to the photodetectors, baffles disposed inside the integrating sphere in front of the photodetectors to be spaced apart from the photodetectors, a photometer disposed at a through-hole, and an adjustment unit adjusting output signals of the photodetectors to have the same output signal with respect to light illuminated from a point-like standard light source disposed at a center region in the integrating sphere.
Abstract:
Verfahren zur Messung der Wolkigkeit von Lackierungen auf Prüftafeln mittels Messung der Farbkoordinaten L*, a* und b* an jeweils mindestens 100 verschiedenen Messorten auf der Prüftafel unter jeweils mindestens 2 verschiedenen Beobachtungswinkeln, wobei (i) zu jeder Gruppe von Messwerten, die unter einem bestimmten Beobachtungswinkel für eine bestimmte Farbkoordinate an verschiedenen Messorten erhalten wurden, die Standardabweichung bestimmt wird, und (ii) aus den so erhaltenen Standardabweichungen die Summe gebildet wird und als Maß für die Wolkigkeit der Lackierung dient.
Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum messtechnischen Erfassen der Farbe eines Objekts (12), bei denen mit Hilfe einer Beleuchtungsanordnung (14), die mindestens zwei Lichtquellen (16 bis 38) mit unterschiedlichen spektralen Lichtverteilungen aufweist, von den Lichtquellen (16 bis 38) gleichzeitig Lichtstrahlen auf das Objekt (12) abgestrahlt werden. Mit Hilfe eines Sensors (40) wird zumindest ein Teil der vom Objekt (12) reflektierten Lichtstrahlen entsprechend mindestens einer spektrale Empfindlichkeitsfunktion erfasst. Die spektrale Empfindlichkeitsfunktion bewirkt eine spektrale Filterung der vom Sensor (40) erfassten Lichtstrahlen.
Abstract:
A tristimulus colorimeter for measuring reflective or transmissive materials is provided. The colorimeter measures a sample under a calibrated light source, receives inputs to detectors, and determines CIE tristimulus values of the same sample as they would occur under a reference light source. The colorimeter includes a calibrated light source and a single silicon chip that includes three or more detectors. Each detector is permanently coated by a different mix of dyes or other colorants that form a wavelength-selective filter. A single silicon chip embodies all the detectors and electronics, with each detector coated over by deposited filter layers.
Abstract:
A hand-held colorimeter (101) suitable for use by blind or colour-blind individuals to determine the colour of a surface, for example of a fabric, has an aperture (110) which, in use, is covered by the surface (113) whose colour is to be determined. Three LEDs (115, 116, 117) emitting orange, green, and blue light illuminate the surface and diffuse reflections therefrom containing orange, green, and blue spectrum sample values are used to determine the luminous reflectivity and chromaticity values for the colour of the surface. The measured values are compared with colorimetric values of reference surfaces and the best fit used to determine the reference surface whose colour is closest to the colour of the surface. The colorimeter may output the name of the colour aurally.
Abstract:
A method of producing a finish for a selected wood substrate, wherein the finish provides the selected wood substrate with a color that matches the color of a target object. In accordance with the method, calculations are performed to determine the quantities of at least one group of colorants required to produce a semitransparent wood stain from a vehicle, wherein when the semitransparent wood stain is applied to the selected wood substrate, the selected wood substrate will have a color that matches the target object. The calculations are performed using reflectance measurements of the target object obtained using a spectrophotometer and previously obtained spectral data of the colorants as applied to at least one type of wood. The colorants used to form the semitransparent wood stain do not include a white colorant.
Abstract:
The invention relates to an evaluation method consisting in representing the pigment combination (B, W, C1 and C2) in the form of a volume in a standardised colorimetric space (Lab) and voxelising said volume. According to the invention, all of the resulting occupied voxels correspond to all of the hues that can be obtained from said pigment combination and each occupied voxel (V2) corresponds to a determined proportion between the constituent pigments (B, W, Cl and C2).