Abstract:
A spectrophotometric system includes a zoom lens assembly that is mounted for axial translation relative to an integrating sphere. The zoom lens assembly includes first and second focusing lens mounted to an axially movable lens carrier. The lens carrier is positioned intermediate first and second sets of mirrors for reflecting/directing SCE and SCI beams toward fiber ports. A reference beam is also emitted from the integrating sphere and transmitted to a processor, thereby resulting in simultaneous tri-beam measurements. The disclosed spectrophotometric systems may also include an aperture plate detection assembly and/or a sample holder assembly that incorporates a dampening gas spring. The aperture plate detection system includes a detection disk that may include a plurality of pre-positioned sensors that interact with an activating ridge formed on the aperture plate for identification thereof.
Abstract:
A method to change the color of hair. The method includes measuring an initial reflectance spectrum [Fig 1a (10)] of a sample of the hair and analyzing a contribution of a plurality of 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 (12) having a sampling port (14) and an inner surface (16) and a window disposed (18) near the sampling port. The window is configured for being placed in close contact with the sample. The system also includes a light source (20) configured to project light onto the sample via the window and a light detector (22) configured to analyze light reflected from the inner surface (16) to produce the reflectance spectrum of the sample.
Abstract:
Apparatus and method for identifying a the presence of a gas (7) is described. The gas detector includes an infra red source (2) emitting radiation into a chamber (5) containing the gas to be analysed. The radiation (8) is absorbed by the gas and the resulting radiation (8') is detected by a suitable infra red detector (4). The spectrum produced by the detector (4) will be characteristic of the gas (7) in the chamber (5), hence allowing the detection of a given gas from within a mixture of gases (7).
Abstract:
An individualized modeling equation for predicting a patient's blood glucose values is generated as a function of non-invasive spectral scans of a body part and an analysis of blood samples from the patient, and is stored on a central computer. The central computer predicts a blood glucose value for the patient as a function of the individualized modeling equation and a non-invasive spectral scan generated by a remote spectral device. If the spectral scan falls within the range of the modeling equation, the predicted blood glucose level is output to the patient. If the spectral scan falls outside the range of the modeling equation, regeneration of the model is required, and the patient takes a number of noninvasive scans and an invasive blood glucose level determination. The computer regenerates the individualized modeling equation as a function of the set of spectral scans and corresponding blood glucose values.
Abstract:
A method and apparatus for irradiating a specimen with a beam of radiation are provided. The method comprises the steps of providing an integrating sphere, a radiation source radiatively communicating with the sphere, and a specimen, the integrating sphere radiatively communicating with the specimen through an aperture in the sphere. The apparatus comprises a radiation source, an integrating sphere in radiative communication with the radiation source, and a specimen holder in radiative communication with the integrating sphere. The disclosed apparatus and method allow the irradiance of a beam of radiation impinging on the specimen to be maintained at a uniform level across the width of the beam to allow quantitative specimen evaluation.
Abstract:
The present invention is for use in the spectroscopic field as applied to the measurement of concentrations of substances of interest in a variety of samples of uniform and non-uniform shape and composition including biological tisues and fluid samples. It incorporates the use of an integrating cavity which is capable of recovering scattered light from a given sample and re-illuminating the sample with that light thereby enhancing the potential for light absorption, which in turn, provides a stronger signal for measurement of light absorption. Samples can be as large as the interior space of the cavity, and preferably the cavity volume and shape are approximately equal to the volume and shape of the sample.
Abstract:
A measuring instrument for reflectometric measurements, comprising a spherical measuring chamber (1) provided with a light source (2) and with a specimen aperture (3); a measuring channel (4) which has been provided with optics (5), with a photometer (6), with an optional stop (7) and with an optional filter (8); a reference channel (14) provided with optics (15), with a photometer (16), with an optional stop (17) and with an optional filter (18); an d a signal processing and calculating device (20s, 20c) for processing and comparing with each other the light intensity values observed by means of the photometers in the measuring and reference channels. As taught by the invention, the measuring instrument comprises at least one visible light light source (2s) which emits substantially light having a wavelength mainly over about 380 nm, and a UV light source (2u) which emits substantially light in the UV range having a wavelength mainly under about 380 nm, advantageously 300 to 380 nm.
Abstract:
Apparatus for detecting and mapping defects in the surfaces of polycrystalline materials to distinguish dislocation pits from grain boundaries includes a laser (16) for illuminating a wide spot on the surface (20) of the material (14), a light integrating sphere (22) with apertures (24, 26) for capturing light scattered by etched dislocation pits in an intermediate range away from specular reflection while allowing light scattered by etched grain boundaries in a near range from specular reflection to pass through, and optical detection devices (40, 50) for detecting and measuring intensities of the respective intermediate scattered light and near specular scattered light. A center blocking aperture (44) or filter can be used to screen out specular reflected light, which would be reflected by nondefect portions of the polycrystalline material surface. An X-Y translation stage (12) for mounting the polycrystalline material and signal processing and computer equipment accommodate raster mapping, recording, and displaying of respective dislocation and grain boundary defect densities.
Abstract:
조명장치에 의해 촬영된 복수의 상이한 근적외영역에 있어서의 피사체의 얼굴 화상을 이용하여 피사체의 피부 또는 모발의 해석을 실시하는 화상해석장치로서, 피사체의 피부 또는 모발에 외용제를 도포하기 전후에 있어서의 상기 얼굴 화상을 취득하는 화상취득수단과, 상기 화상취득수단에 의해 취득한 화상에 휘도보정을 실시하는 휘도보정수단과, 상기 휘도보정수단에 의해 얻어진 상기 외용제를 도포하기 전후의 화상의 차분량을 상기 복수의 상이한 근적외영역마다 취득하는 차분량 취득수단과, 상기 차분량 취득수단에 의해 얻어지는 차분량에 기초하여 피사체의 피부 또는 모발을 해석하는 해석수단과, 상기 해석수단에 의해 얻어진 해석결과를 표시하는 화면을 생성하는 화상형성수단을 구비하는 것을 특징으로 한다.