摘要:
Methods, apparatuses and systems for sensing are disclosed herein. An example sensor may include an omnidirectional reflector, a calibration source located inside the omnidirectional reflector and configured to generate one or more calibration beams, a first filter configured to filter one or more first beams including any of a first portion of the incoming beams collected and concentrated by the omnidirectional reflector, and a first detector configured to detect the filtered one or more first beams.
摘要:
There is provided a light receiver which corrects measurement of ultraviolet rays on the basis of measurement of visible right and infrared rays. The light receiver is a light receiver (1) including a first light-receiving element (PD1) and a second light-receiving element (PD2), and a UV cutoff filter (11) in which transmittance of light in an ultraviolet region is lower, in which light after passage through the UV cutoff filter (11) enters the first light-receiving element (PD1), and the first light-receiving element (PD1) and the second light-receiving element (PD2) are switchable between a photodiode (PD_uv) having sensitivity to the ultraviolet region and a photodiode (PD_clear) having sensitivity to a visible light region and an infrared region. Unevenness in incident light is calculated from photocurrents in photodiodes (PD_ir+PD_vis) of the first light-receiving element (PD1) and the second light-receiving element (PD2).
摘要:
Ambient light sensing and proximity sensing is accomplished using pairs of stacked photodiodes. Each pair includes a shallow diode with a shallow junction depth that is more sensitive to light having a shorter wavelength and a deeper diode with a deeper junction depth more sensitive to light with longer wavelengths. Photodiodes receiving light passed through cyan, yellow, and magenta filters and light passed without a color filter are used to generate red, green, and blue information through a subtractive approach. The shallow diodes are used to generate lux values for ambient light and the deeper diodes are used for proximity sensing. One or more of the deep diodes may be used in correction to lux determinations of ambient light.
摘要:
Optical characteristic measuring systems and methods such as for determining the color or other optical characteristics of teeth are disclosed. Perimeter receiver fiber optics preferably are spaced apart from a source fiber optic and receive light from the surface of the object/tooth being measured. Light from the perimeter fiber optics pass to a variety of filters. The system utilizes the perimeter receiver fiber optics to determine information regarding the height and angle of the probe With respect to the object/tooth being measured. Under processor control, the optical characteristics measurement may be made at a predetermined height and angle. Various color spectral photometer arrangements are disclosed. Translucency, fluorescence, gloss and/or surface texture data also may be obtained. Audio feedback may be provided to guide operator use of the system. The probe may have a removable or shielded tip for contamination prevention. A method of producing dental prostheses based on measured data also is disclosed. Measured data also may be stored and/or organized as part of a patient data base. Such methods and implements may be desirably utilized for purposes of detecting and preventing counterfeiting or the like. Low cost and small form factor spectrometers, and methods for manufacturing the same, also are disclosed.
摘要:
Systems and methods are provided for calibrating spectral measurements taken of one or more targets from an aerial vehicle. Multiple photo sensors may be configured to obtain spectral measurements of one or more ambient light sources. The obtained spectral measurements of the one or more ambient light sources may be used to calibrate the obtained spectral measurements of the target.
摘要:
Systems and methods are provided for calibrating spectral measurements taken of one or more targets from an aerial vehicle. Multiple photo sensors may be configured to obtain spectral measurements of one or more ambient light sources. The obtained spectral measurements of the one or more ambient light sources may be used to calibrate the obtained spectral measurements of the target.
摘要:
Background composition concentration data representative of an actual background composition of a sample gas can be used to model absorption spectroscopy measurement data obtained for a gas sample and to correct an analysis of the absorption spectroscopy data (e.g. for structural interference and collisional broadening) based on the modeling.
摘要:
A method and apparatus for simulating light. A first light from a first filterer is output to a solar cell. The first light output by the first filterer has a coarse spectrum that simulates the light in a selected environment. A second light from a second filterer is output to the solar cell while the first light is output by the first filterer. The second light output by the second filterer has a fine spectrum selected for a group of junctions in the solar cell.
摘要:
Embodiments of spectral filters with dye-impregnated nano-spheres are described herein. Other embodiments may be described and claimed. In some embodiments, a spectral filter comprises a host material that includes a plurality of nano-particles embedded within. The particles include a dye having an absorption band of wavelengths and have a size selected to resonate at a range of wavelengths that is within the absorption band. The particles may be selected to resonate in either a plasmon mode or a whispering-gallery mode.
摘要:
The invention relates to photonic crystals which have units having a refractive index of greater than 3 and units having a refractive index of less than 1.6 in a periodic sequence and separations of the individual units of from 1 to 20 μm, and also to the use of these photonic crystals.