Abstract:
An optical sensor system is provided which provides portions of the intensity spectrum of various types of natural and artificial light and combinations thereof. The illumination passes through a series of band pass filters or through a diffraction grating to be sensed by a plurality of photosensors sensing different portions of the spectrum. The photosensors are connected to a processing system which can determine the nature of the illuminants from characteristic areas of the intensity spectrum falling on the photosensors.
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 for use with a spectrometer includes a reflector for illuminating a sample volume disposed circumferentially about the light source 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 to facilitate calibration of the spectrometer.
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 for use with a spectrometer 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 to facilitate calibration of the spectrometer.
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 desktop color measurement system that includes an instrument capable of making color measurements. The system includes a host computer and a digital color sensor (DCS) in communication with the host computer. The DCS includes optical elements for making spectral measurements, and control electronics for controlling the optical elements. In a specific embodiment, the DCS is dedicated to the mechanics of acquiring the raw data. The host computer, which may be a personal computer, performs all the calculations needed to convert raw measurement values into spectral data and other color representations such as tristimulus values and density. This also allows the system to function as a calorimeter and a densitometer as well as a spectrophotometer. The DCS control circuitry includes non-volatile writable storage for information obtained during a factory calibration procedure, which information allows the user to recalibrate the DCS in the field.
Abstract:
A spectral densitometer system reads dosimeter cards. The cards contain bar codes with information for calibration of the system and for identification of the cards (serial numbers for each card). The densitometer has compartments optically and physically separated by a mechanism which contains a slide for receiving the cards and moving them into alignment with openings which expose the bar code to a bar code scanner in one of the compartments. The compartment containing the scanner also contains a source of illumination which projects through another opening and through a radiation sensitive patch. A scanning spectrophotometer in the other compartment reads the spectrum of the transmitted illumination. The system includes a computer, which may be a separate host computer, connected to the spectrophotometer and the bar code reader via communication ports. The computer computes the dosage based upon the wavelength measurements and the calibration information contained in the bar code. The bar code reading and spectral measurements are individual to each card thereby preventing mixups which are likely to occur if separate instruments for bar code reading and spectral measurements were used. The optical isolation provided by the slide mechanism prevents light leaks which can lead to false spectral measurements. The dosage readings are made automatically, rapidly and accurately with the integrated spectral densitometer and bar code reader of the system.
Abstract:
A robust spectrophotometer (also known as a color spectrometer or colorimeter) is self contained in a housing which is adapted to be held-held and has all of the electrical, optical and electro optic elements mounted on a board captured within the housing at one end of which light from a sample is restricted to an object area and projected after being dispersed spectrally, as with a reflection grating, to an image area at a photodetector via a lens which has an optical axis and converges the dispersed light at the image area. The dispersive element is mounted on an arm having a pivot laterally offset from the dispersive element's surface where a diverging beam of light from the object area is incident and is deflected to the image area. The geometry is such that the dispersive element may be rotated to a position where the beam is specularly deflected (zeroth order diffraction), and the spectrometer calibrated when the dispersive element is in the specular reflection/deflection position. The path from the object area is approximately perpendicular to the optical axis, and then is folded by mirrors to direct the beam to incidence on the dispersive element, from which the beam is deflected and focused by the lens, the focal length of which is such that the image and object areas are in conjugate relationship. Radiant or electroluminescent sources, for example, the screen of a CRT monitor, can directly illuminate the object area. A pivotal foot on the housing having an aperture may be used to facilitate alignment of the sample with the entrance opening to the housing of the spectrophotometer.
Abstract:
A handheld portable spectrophotometer is provided including keys for input of instructions by a user, an illuminator for illuminating a sample, and a spectral analyzer for separating light reflected from the sample into spectral components to produce a signal corresponding to the level of each spectral component. A processor is provided for executing the user instructions and for analyzing the signal. The results of the signal analysis are presented on a display. A power source is provided for providing power for operation of the handheld portable spectrophotometer.
Abstract:
A method giving a color tone-evaluating result which catches the deepness and transparency feelings of a coating film in an objective manner, and a device for use of this method. The evaluating results are obtained by projecting a luminous flux on a coating film, the high light saturation and/or high light excitation purity of the coating film are gotten on a basis of a high light part which is in an angle range of 5.degree. to 15.degree. against the regularly reflecting luminous flux in the reflecting light, and that, if necessary, the shade saturation and/or shade excitation purity are gotten on a basis of a shade part which is in an angle range exceeding 15.degree..
Abstract:
This invention relates to a optical fiber type colorimeter, and in particularly it refers to a colorimeter which uses optical fibers to transmit light to sample or reference matter. Scattered light reflected from matter surface is received by a optical fiber and then transmitted to a grating which splits light into spectrum. An A/D converter is connected to the driver circuit to communicated signal to computer for analysis of chromatic value, and determination of chrominace of sample, especially for analysis of some solid, products like textile, paper or brick. Since optical fibers are used in this invention, it enables more flexible installation of this invention. Moreover, precision of measurement is no longer affected by testing environment. The fabrication cost is lowered without the use of conventional reflective mirror.
Abstract translation:本发明涉及一种光纤型色度计,特别涉及使用光纤将光透射到样品或参考物质的色度计。 从物质表面反射的散射光被光纤接收,然后传输到将光分解成光谱的光栅。 A / D转换器连接到驱动电路,将信号传送到计算机,以分析色彩值,并确定样品的色度,特别是用于分析一些固体产品,如纺织品,纸张或砖。 由于在本发明中使用光纤,因此能够更灵活地安装本发明。 此外,测量精度不再受测试环境的影响。 在不使用常规反射镜的情况下,制造成本降低。