Abstract:
Dual band filters and detectors are described herein. A detector can include a filter for filtering light from a scene to be imaged, the filter having at least one window that only allows light to pass there through that is within a medium wavelength infrared wavelength range and at least one window that allows light to pass there through that is not within a medium wavelength infrared wavelength range and an imager array that receives the filtered light that passes through the filter.
Abstract:
A first radiance meter that is provided so as to face an object in an atmosphere in which there is dust and measures the radiance of the object and a second radiance meter that is provided so as not to oppose the object and measures the radiance of the dust between the object and the first radiance meter are used to measure the temperature of the object on the basis of the object radiance that has been measured by the first radiance meter and the radiance of the dust between the object and the first radiance meter that has been measured by the second radiance meter.
Abstract:
A component measuring apparatus includes a plurality of light sources having different Wavelengths. The component measuring apparatus also includes an irradiation unit that applies lights emitted from the plural light sources to a measurement object, and a light receiving unit that receives at least one of light having transmitted through the measurement object and light having been scattered from the measurement object. The component measuring apparatus further includes a measuring unit that measures intensity of the light received by the light receiving unit per wavelength.
Abstract:
An additive manufacturing temperature controller/temperature sensor uses one or more spectrophotometric sensors to monitor temperature of successive layers and preferably localized sections of successive layers of a melt pool, and transients thereof, of an object being generated for the purpose of dynamic control of the additive manufacturing device and/or quality control of the generated object manufactured with the additive manufacturing device. Generally, the additive manufacturing temperature controller/sensor apparatus monitors temperature of a section of the object during manufacture as a function of wavelength, time, position, and/or angle to determine melt extent in terms of radius and/or depth.
Abstract:
There are provided an optical non-destructive inspection apparatus that can inspect a measurement object such as a wire bonding portion. The apparatus includes a focusing-collimating unit, a heating laser beam source, a heating laser beam guide unit, a first infrared detector, a second infrared detector, an emitted-infrared selective guide unit, and a control unit. The control unit controls the heating laser beam source, measures a temperature rise characteristic that is a temperature rise state of a measurement spot based on a heating time, on the basis of a ratio between a detected value from the first infrared detector and a detected value from the second infrared detector, determines a state of a measurement object based on the temperature rise characteristic, and changes at least one of wavelengths of infrared light beams guided to the first infrared detector and the second infrared detector based on a measured temperature during measurement.
Abstract:
An infrared (IR) imaging system is presented. The system includes a cooling chamber associated with a cooler generating a certain temperature condition inside the chamber. The cooling chamber has an optical window, and includes thereinside an IR detection unit including one or more detectors thermally coupled to the cooler and at least two cold shields thermally coupled to the cooler and carrying at least two imaging optical assemblies. The at least two imaging optical assemblies are enclosed by the cold shields in between the detection unit and the optical window and thereby define at least two different optical channels for imaging light from the optical window onto the one or more detectors of the detection unit.
Abstract:
A system for measuring temperature within a region to be tested includes a sensor means responsive to the temperature within the region for transmitting light energy along an optically-transmissive path and detector and amplifier means responsive to the light energy for producing an output signal which represents the intensity of the light energy. A signal processor electronically calculates a display signal from the output signal which represents the temperature within the test region. The signal processor performs this calcuation by solving Planck's equation, and a successive bisection technique is utilized to achieve extremely fine resolution of the temperature.
Abstract:
A wavelength discriminator designed to collect broadband, multiple wavelength input energy, to isolate specific narrow bands of interest, and to image such narrow bands of interest upon closely spaced, separate detectors. This discriminator comprises optical devices (22, 18) for directing incoming radiant energy of a certain quality and involving a wide range of wavelengths through first (26a) and second (26b) wavelength selective reflectors separated by a medium that transmits the wavelengths of interest. The wavelength selective reflectors in accordance with this invention are in a non-parallel configuration and disposed in a double pass geometrical arrangement wherein energy of a certain wavelength reflected from the second wavelength selective reflector (26b) passes back through the first wavelength selective reflector (26a), with the energy from the first and second wavelength reflectors thereafter being directed onto respective detectors (32aand 32b). An embodiment involving a third wavelength selective reflector (26c) grouped with the first and second reflectors may be utilized, wherein energy of a different wavelength reflected from the third wavelength selective reflector passes back through both the second and first wavelength selective reflectors, with the selected wavelengths thereafter falling upon three separate detectors (32a, 32band 32c) of the array.
Abstract:
A first radiance meter that is provided so as to face an object in an atmosphere in which there is dust and measures the radiance of the object and a second radiance meter that is provided so as not to oppose the object and measures the radiance of the dust between the object and the first radiance meter are used to measure the temperature of the object on the basis of the object radiance that has been measured by the first radiance meter and the radiance of the dust between the obj ect and the first radiance meter that has been measured by the second radiance meter.
Abstract:
Pyromètre bichromatique pour la détection de la température élevée d'un élément de surface d'un objet, comprenant deux photodiodes (18, 19) recevant le rayonnement de l'objet, chacune à large bande interdite et sensible au rayonnement dans un domaine de longueurs d'onde donné, ces domaines de sensibilité étant différents, et situés dans le visible ou proches du visible, et étant obtenu par le choix de la valeur de la bande interdite du matériau constitutif de chacune des photodiodes (18) et (19), qui est supérieure ou égale à celle du silicium (≧1,11e V). Détermination de la température de surfaces rapidement évolutives avec une grande précision.