Abstract:
A method to change the color of hair. The method includes measuring an initial reflectance spectrum of a sample of the hair and analyzing a contribution of a plurality of natural hair factors to the initial reflectance spectrum. The method also includes calculating a hair treatment based on another reflectance spectrum. A system to measure a reflectance spectrum of a sample includes an integrating sphere having a sampling port and an inner surface and a window disposed near the sampling port. The window is configured for being placed in close contact with the sample. The system also includes a light source configured to project light onto the sample via the window and a light detector configured to analyze light reflected from the inner surface to produce the reflectance spectrum of the sample.
Abstract:
A combination of a response adapting filter (11, 12, 13) and a detector (14), the detector having a predetermined spectral response function to electromagnetic radiation, a method of its preparation, a camera (11, 12, 13, 14, 15) comprising such a response filter and detector combination, and use thereof in e.g. colour measurements in combination with an integrating cavity and a vision inspection system of natural and/or a synthetic material surfaces; also a display and detector combination, a method of displaying optical information, a colour display and monitor system, and a method of controlling colour display, said combination, systems and methods comprising such combination of a response adapting filter and a detector.
Abstract:
The invention relates to evaluation of gemstones and other transparent specimens and in particular to color grading of gemstones. The device utilizes a band pass filter (23) which transmits light through lenses (32) onto the detector array (31) to obtain the spectral response of a complete image. The gemstone is illuminated with annular light ring (22), which receives light from a light source (18) located in the right half compartment (14), in a way that provides for analysis of both reflected and transmitted light. The device utilizes multiple lighting angles to construct a composite image that is used to perform the grading of the gemstones.
Abstract:
A color measuring system (10) includes a portable spectrophotometer (100) connectable to a general-purpose computer (130). The portable unit (100) includes a microprocessor with a read-only program memory for storing machine executable instructions and input/output functions. A random-access data memory is used to temporarily store process data for later transfer to the general-purpose computer (130) or to store in a command buffer area transferred high-level, generalized commands from the general-purpose computer (130). The microprocessor also includes a command interpreter which reads a generalized command from data memory and executes the predefined sequence of machine executable functions.
Abstract:
The invention makes it possible to determine the colour to be given particularly to a dental prosthesis from the measurement of the colour of adjacent teeth in the mouth of the patient. An optical fiber instrument (44) senses the light reflected by a tooth (50) and transmits the light to the input of a spectrocolorimeter (12, 14) associated with a microprocessor (10) in order to determine the spectral reflectance diffused by the tooth and to calculate the trichromatic components of its apparent colours for various types of lighting. The invention applies particularly to the determination of colours of dental prostheses.
Abstract:
PROBLEM TO BE SOLVED: To provide a small-size imaging device having a uniform optical intensity distribution inside a prescribed plane nearly perpendicular to an optical axis, having a reduced light intensity change in a direction along the optical axis, and capable of measuring a color distribution of the surface of an object with high accuracy, and to provide a lighting unit used for the imaging device. SOLUTION: This lighting unit has: a light source part 210 supplying illumination light; a diffusion part 211 reflecting and diffusing the illumination light from the light source part 210; and aperture parts 212a, 212b emitting the diffused illumination light. The aperture parts 212a, 212b each have an aperture diameter D for emitting the diffused illumination light as nearly parallel light. COPYRIGHT: (C)2006,JPO&NCIPI