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7471385 |
Systems and methods for selecting a reference database for determining a spectrum of an object based on fluorescence of the object
To determine the spectra of objects that have different degrees of fluorescence, a plurality of reference databases are provided, each reference database being suited to a different degree of...
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7450226 |
Gray balance calibration of an imaging system
A calibration system includes a printer capable of being calibrated and a printable calibration sheet. The printable calibration sheet includes at least one calibration reference segment printed on...
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7417735 |
Systems and methods for measuring color and contrast in specular reflective devices
Disclosed herein are systems and methods for measuring color and contrast in specular reflective devices such as interferometric modulators. To make color and contrast determinations, light...
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7385701 |
Standard plane sample and optical characteristic measurement system
A standard plane sample which supplies an optical characteristic measuring device with reference data. The standard plane sample including a sample portion that is measured by the optical...
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7193701 |
Gray optical standard
A system for providing and using a gray optical standard is disclosed, the standard generally comprising a housing having a cavity and an at least partially transparent portion adjacent to the...
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7072035 |
Verification device for optical clinical assay systems
A device and method for verifying correct performance of an optical clinical assay system is provided.
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6998185 |
Dye-based fuel indicator system for fuel cells
A means for determining the concentration of a hydrogen-rich fuel in a fuel solution within the anode reservoir of a fuel cell. The fuel concentration is determined using a dye mixture responsive...
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6926407 |
Apparatus and method for measuring a hue of a predetermined primary color in reflected light
The invention provides an apparatus for measuring a hue of a predetermined primary color included in light reflected from a surface. The apparatus has a diffuse light source for creating incident...
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6721054 |
Method and apparatus for determining the reflectance of translucent objects
A method for accurately measuring the reflectance of translucent objects by illuminating small areas of the object is disclosed. The method involves determining the lateral diffusion error by use...
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6459485 |
Optical system
An optical system used in an optical measuring apparatus for measuring optical characteristics of, for example, a liquid crystal display panel (LCD panel) guides rays emitted from the LCD panel and...
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6437863 |
Method and apparatus for detecting and measuring conditions affecting color
A method and apparatus for determining the condition of a test subject based on color uses a color measuring instrument to detect change in a color factor indicative of a condition such as a...
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6271920 |
Methods and apparatus for color calibration and verification
Methods and apparatus for calibrating a color measuring instrument with a color standard and verifying the color standard and calibration are provided. One method includes providing a color...
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6128090 |
Visual control strip for imageable media
A visual control strip for imageable media such as a printing plate, a photographic film or a printable substrate is described wherein the visual control strip is to be applied to the imageable...
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6088095 |
Model-based spectral calibration of color scanners
A target-less calibration system for calibrating a scanner for a particular input medium without using a dedicated calibration target on that medium is disclosed. The system employs the...
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6061128 |
Verification device for optical clinical assay systems
A device and method for verifying correct performance of an optical clinical assay system is provided.
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6002482 |
Disposable calibration device
A combined infection shield and calibration or reference target for use with a measuring instrument includes a removable calibration/reference layer. The removable calibration/reference layer has...
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5936727 |
Wavelength standard
In an optical wavelength standard, a concrete matrix embeds wavelength reference material. The concrete matrix is formed from a powdered halogenated polymer (e.g., PTFE) which is mixed with...
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5895836 |
Greyscale calibration method in digital printing
The method of the invention allows adjustment of the Greyscale of a digital print in addition to adjusting the individual colors thereof, which have a tendency to vary as the respective inks are...
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5592290 |
Method for correcting instrumental error of spectroscope of optical analyzer
A method for correcting an instrumental error due to wavelength error of a spectroscope of an optical analyzer for measuring an optical density reflected from or transmitted through a dry analysis...
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5568266 |
Colorimeter and colorimetrical control device
A colorimeter is provided in which a measuring pipe diverts a sample of a substance off of a production line into a measuring chamber. A series of cut-off valves control the quantity of the sample...
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5508803 |
Method and apparatus for monitoring lithographic exposure
A lithographic mask with an exposure monitor for imaging a gray scale feature. The exposure monitor has abutting regions of differing optical density disposed on the mask for imaging the gray scale...
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5416613 |
Color printer calibration test pattern
A method of calibrating the response of the printer to an image described in terms of colorimetric values, including the steps of: a) setting printer parameters; b) deriving a printer response...
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5381227 |
Standard materials and methods for instrumental measurement for ASTM color of petroleum products using said standard materials
A set of standard materials, which comprises at least two kinds of standard materials, for calibration of a photoelectric colorimeter used for the instrumental measurement of petroleum products for...
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5371599 |
Rapid color shading process
A process for shading paint to match the color of a standard color paint which process involves the use of transparent film to optically simulate the effect of reading color through the...
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5323002 |
Spatial light modulator based optical calibration system
A method and system for calibration of optical systems is disclosed. The system consists of a reference source (12), a spatial light modulator (26) for transmitting the reference source signal...
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4795254 |
Durable working matte/glossy color standard and method of making same
A color reference standard and method of making same are disclosed. A transparent film having a matte surface and a spectral optical modulator are selected. The spectral optical modulator,...
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4755050 |
Standard for monitoring the calibration of an optical line width measuring machine
According to the invention there is provided a standard for monitoring the calibration of optical line width measuring machines which includes an opaque sheet having two spaced apart slots....
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4731209 |
Method of making standard color models used for judging beef
Colors of sections of several beef carcasses are measured and the colors are classified into a predetermined number of grades of tone. Colored silicon plastic sol is poured in a glass cell for each...
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4715715 |
System for measuring the color of a material
A system is provided for measuring the color of a sample material, and the system includes means for illuminating the sample and a sensor to measure light from the sample. The system also includes...
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4569594 |
Color value measurement
A sample to be measured, a black reference and at least one reference having a color similar to that of the sample are exposed successively and cyclicly to the same incident light beam, the light...
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4568184 |
Reader card for densitometric test analysis
A reader card for use in densitometric test analysis wherein a film having data recorded as spots thereon is supported by and retained on a base card, the reader card further having an area for use...
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4523852 |
Color comparison reference standard and method for using same
An improved method for visually comparing the results of colorimetric analytical tests to a color reference standard, enabling substantially improved quantitation to be achieved for such tests, is...
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4422759 |
Photographic accessory
A photographic accessory, for application to a body surface and other medical and scientific uses, having dimensional graduations and color patches to facilitate correlation of photographic data...
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4259020 |
Automatic calibration control for color grading apparatus
Apparatus for color grading of products such as fruits, vegetables, et cetera, employing a light source for illuminating the product and means for detecting and comparing the reflectance to measure...
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4093385 |
Color gradient analyzer
A color gradient analyzer having a photo-electric convertor and a rotational filter having a plurality of optical color filters provides the information of an object. The output of said...
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4059357 |
Densitometer calibrated reference standard
A standard for calibrating a densitometer or the like is disclosed consisting of an optically transparent substrate supporting a plurality of spaced bands of different predetermined optical...
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4056485 |
Stable colored reference standard for enzymatic determinations
A stable, colored reference standard suitable for use in diagnostic determinations involving enzymatic reactions in which colorless 2-(p-iodophenyl)-3-(p-nitrophenyl)-5-phenyltetrazolium chloride...
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4050450 |
Reflection standard for fiber optic probe
A flexible fiber optic probe or catheter insertable into the cardiovasular system for monitoring blood oxygen saturation or the like is provided with an improved standard for the calibration of the...
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4035085 |
Method and apparatus for comparing light reflectance of a sample against a standard
Fluorinated aliphatic long chain addition polymers comprised of at least one monomer having at least one fluorine atom attached to a chain carbon atom are used in various environments for their...
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4029419 |
Textile color analyzer calibration
A spectrophotometer is operative to measure or analyze the colors of materials such as textiles. A test sample is held by a holder and is illuminated by polychromatic light. Diffuse light reflected...
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3956201 |
Article of manufacture having thereon a stable reflective coating containing fluorinated aliphatic ring chain addition polymers
Fluorinated aliphatic long chain addition polymers comprised of at least one monomer having at least one fluorine atom attached to a chain carbon atom are used in various environments for their...
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3951721 |
Method of forming a mechanically strong reflective surface
A reflecting surface is formed on an inner base plate of an integrating sphere. A fabric is bonded to an under coat layer of said base plate and furthermore a reflecting layer is formed on said...
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3936188 |
Color sorting of irradiated materials and a calibrated color comparison array
Methods of isolating quartz, quartzite, glass or silicate materials having selected aluminum contents are described. The non-destructive method comprises subjecting the materials to ionizing...
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3832070 |
CALIBRATION SYSTEM FOR REFLECTION DENSITOMETERS
In a reflection densitometer calibration system, a calibration standard comprises a paper sheet having color zones printed thereon, including the colors white, black, and shades of blue, red and...
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3799668 |
COLOR STANDARD AND METHOD OF CALIBRATING A MULTI-COLOR ELECTROPHOTOGRAPHIC PRINTING MACHINE
A color standard and method of use therefore in which a multi-color electrophotographic machine is calibrated for controlling the color balance and image density of a copy being reproduced therein.
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3773425 |
VISUAL COMPARATOR SYSTEM
The invention of the Visual Comparator System herein disclosed consists of two axially transparent and/or translucent samples, one of which is usually a reference sample and one a test sample, a...
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3759619 |
MEASUREMENT OF COLOUR OF SPHERICAL OS QUASI-SPHERICAL SURFACES
The color of a substantially spherical surface, such as that of a fruit, is measured by rotating the object about a vertical axis and projecting on the surface of the object, downwardly at 45°, an...
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3609045 |
APPARATUS FOR STORING AND VISIBLY COMPARING THE OPTICAL PROPERTIES OF MINATURE SAMPLES
Apparatus for storing a plurality of samples having known optical properties and for displaying and samples in a manner wherein the latter may be readily compared with an unknown sample for...
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3520626 |
COLOR WHEEL FOR COLOR COMPARATORS
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3493774 |
METHODS OF DETERMINING THE QUALITY OF MEAT AND DEVICES FOR CARRYING OUT SAID METHODS
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