Abstract:
PURPOSE:To measure the X, Y, and Z value of a sample stably by equalizing mechanisms which equalize two optical paths on a standard and a sample side in the quantity of light, distributing light energy uniformly in incident luminous flux, and performing zero resetting, standard matching, and measurement in one cycle. CONSTITUTION:Light from a light source 1 passes through a lens and a rotating disk 8 and is distributed through a prism 4 to the sample-side optical path 23 to the sample 10 and the standard-side optical path 24 to a standard plate 11. The light of either optical path passes through an aperture of the rotating disk 8, and reflected light beams from the sample 10 and standard plate 11 are photodetected by the X, Y, and Z photodetectors 13, 14, and 15 of an integrating sphere 12 individually. The quantities of light of those two optical paths are equalized to each other through photodetectors 17 and 19 on the optical paths by the upward/downward movement of a light-quantity adjusting diaphragm 21. The standard plate, sample 10, and a reference standard plate 11 are set and irradiated with light whose quantity is adjusted to find the X, Y, and Z absolute values of the measured sample. Pieces of luminous flux 23 and 24 are passed through three apertures at equal intervals of the rotating disk 8 by turns to perform the zero resetting, standard matching, and measurement in a 120 deg. rotation of the disk 8.
Abstract:
PURPOSE:To enable an objective and highly accurate measurement by detecting white reflected light with a color gauge from lights irradiated on the surface of skin. CONSTITUTION:Light is applied on a hair-lost part at a fixed time interval to detect the reflected light with a color guige. In this measurement, the Y value indicating brightness among light-stimulation values X, Y and Z is converted into a value L indicating whiteness in the Lab value for the surface condition of a skin. This shows how hair grows. In the operation of the color guage, first, light of a light source 1a is applied on a hair-lost part through an optical fiber 1b. The reflected light thereof is captured with an integratibg ball 1c and detected with photoelectric conversion filters 1dX, 1dY and 1dZ. Then, this electric signal is digitally converted to indicate. In this case, as the object is a white aminal, the value L can be obtained by conversion of the value Y from the digital filter 1dY.
Abstract:
Die Erfindung betrifft eine Messanordnung zur Erfassung eines absoluten Reflexionsspektrums einer Probe (04, 21, 42, 54, 66) in einem Produktionsprozess der Probe (04, 21, 42, 54). Sie umfasst eine Lichtquelle zur Erzeugung vom Messlicht, einen Homogenisator zur Erzeugung einer gleichmäßigen räumlichen Beleuchtungsstärkeverteilung des Messlichtes; einen beweglichen Reflektor (6, 16, 39, 52, 59,62) und einen Empfänger (07, 22, 37, 53) zum Einsammeln des von der Probe (04, 21, 42, 54) und/oder dem Reflektor (6, 16, 39, 52) reflektierten Messlichtes. Erfindungsgemäß ist der Reflektor (6, 16, 39, 52, 59, 62) sowohl für eine Referenzmessung, als auch für eine Probenmessung in einem Beobachtungsstrahlengang positioniert und auf der selben Seite der Probe (04, 21, 42, 4, 66) wie die Lichtquelle angeordnet, um das reflektierte Messlicht dem Empfänger (07, 22, 37, 53) zuzuführen.
Abstract:
Multiple colors of light emitted by a light emitting diode (LED) based illumination device (100) are automatically tuned to within a predefined tolerance of multiple target color points by modifying portions of wavelength converting materials associated with each color. A first color of light emitted from the LED based illumination device (100) in response to a first current (185) is measured and a second color of light emitted from the LED based illumination device (100) in response to a second current (184) is measured. A material modification plan to modify wavelength converting materials is determined based at least in part on the measured colors of light and desired colors of light to be emitted. The wavelength converting materials are selectively modified in accordance with the material modification plan so that the LED based illumination device (100) emits colors of light that are within a predetermined tolerance of target color points.
Abstract:
Embodiments described herein include broadband light source system comprising an optic coupler including a plurality of input branches coupled to an output. The system includes a plurality of light sources coupled to the plurality of input branches. Each light source outputs light having a different wavelength distribution than any other light source of the plurality of light sources. The output emits a broadband light source comprising a combined spectral output of the plurality of light sources.
Abstract:
The invention relates to a method for determining the gloss of a colour standard comprising the following steps: A) experimentally determining reflection spectra R(exp) of the colour standard, comprising a first reflection spectrum and a second reflection spectrum, with an integrating sphere colour measurement instrument, wherein said first reflection spectrum is obtained at (A1) d/8 - geometry with the specular component included, and said second reflection spectrum is obtained at (A2) d/8 - geometry with the specular component excluded, and B) converting reflection spectra data of the experimentally determined reflection spectra R(exp) of the colour standard to gloss values by: B1) acquiring the difference reflection spectrum ΔR of the experimentally determined reflection spectrum R(exp) with the specular component included (A1) and the reflection spectrum R (exp) with the specular component excluded (A2), and B2) determining the gloss values corresponding to said difference reflection spectrum ΔR with the assistance of previously prepared calibration curves, representing the functional relationship between the difference reflection spectrum ΔR and the gloss values measured at one or more gloss angles.
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:
Systems, methodologies, media, and other embodiments associated with color measuring are described. One exemplary system embodiment includes a spectrophotometer (100), one or more light sources (110) for illuminating an interior of the spectrophotometer (100), and a digital camera (105) configured at a port (125) of the spectrophotometer and being configured to measure light components from a sample (115). In the present invention, segmentation logic is provided for the spectrophotometer that is configured to employ computational image segmentation to characterize specular reflection from a sample and to characterize a selected patch or portion from the test sample, such as a selected color in a multicolor pattern. In accordance with the present invention, the spectrophotometer (100) and the included digital camera (105) may be color-characterized in situ.
Abstract:
Systems, methodologies, media, and other embodiments associated with color measuring are described. One exemplary system embodiment includes a spectrophotometer, one or more light sources for illuminating an interior of the spectrophotometer, and a digital camera configured at a port of the spectrophotometer and being configured to measure light components from a sample. In the present invention, segmentation logic is provided for the spectrophotometer that is configured to employ computational image segmentation to characterize specular reflection from a sample and to characterize a selected patch or portion from the test sample, such as a selected color in a multicolor pattern. In accordance with the present invention, the spectrophotometer and the included digital camera may be color-characterized in situ.
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.