Abstract:
The invention describes a light sensor (1) comprising a filter arrangement (11), which filter arrangement (11) comprises a number of spectral filters (F1, F2, . . . , Fn) for filtering incident light (L), wherein a spectral filter (F1, F2, . . . , Fn) is realized to pass a distinct component of the incident light (L), an aperture arrangement (12) for admitting a fraction of the incident light (L), and a sensor arrangement (13) realized to collect the admitted filtered light (L′), which sensor arrangement (13) comprises an array of sensor elements (130) for generating image-related signals (S, S1, S2, . . . , Sn) and which sensor array is sub-divided into a number of regions (R1, R2, . . . , Rn), wherein a region (R1, R2, . . . , Rn) of the sensor array is allocated to a corresponding spectral filter (Fi, F2, . . . , Fn) such that an image-related signal (S) generated by a sensor element (130) of a particular region (R1, R2, . . . , Rn) comprises information pertaining to the direction of origin and/or the spectral composition of the light passed by the corresponding spectral filter (F1, F2, . . . , Fn). The invention further describes a light sensor device (10) for determining the direction of origin and/or the spectral composition of light (L) incident at the light sensor device (10), a method of collecting incident light (L), and a method of determining the direction of origin and/or the spectral composition of incident light (L).
Abstract:
An infrared-sensor filter member includes an optical filter disposed in an opening portion of a second member and a first member. The infrared-sensor filter member includes a recess portion formed from a light-incident surface of the optical filter and the first member. At least a part of a bottom surface of the recess portion is formed by the light-incident surface and side walls of the recess portion, which are formed by the first member.
Abstract:
A hyperspectral imaging system having an optical path. The system including an illumination source adapted to output a light beam, the light beam illuminating a target, a dispersing element arranged in the optical path and adapted to separate the light beam into a plurality of wavelengths, a digital micromirror array adapted to tune the plurality of wavelengths into a spectrum, an optical device having a detector and adapted to collect the spectrum reflected from the target and arranged in the optical path and a processor operatively connected to and adapted to control at least one of: the illumination source; the dispersing element; the digital micromirror array; the optical device; and, the detector, the processor further adapted to output a hyperspectral image of the target. The dispersing element is arranged between the illumination source and the digital micromirror array, the digital micromirror array is arranged to transmit the spectrum to the target and the optical device is arranged in the optical path after the target.
Abstract:
A system for acquiring a hyperspectral image, including: a grey level image sensor; and a diffuser and dispersive element placed on the optical path between the sensor and a scene, this element including an array of individually-controllable liquid crystal cells, where each cell can receive a control voltage selected from among a series of at least three different control voltages.
Abstract:
Multispectral images, including ultraviolet light and its interactions with ultraviolet light-interactive compounds, can be captured, processed, and represented to a user. Ultraviolet-light related information can be conveniently provided to a user to allow the user to have awareness of UV characteristics and the user's risk to UV exposure.
Abstract:
A gas detection system comprising a case having a hollow chamber, a gas input port, a gas output port, a radiation emitting device, and a photo detector. The gas input port may be disposed on the case for a test gas flowing into the chamber. The gas output port may be disposed on the case for the test gas flowing out of the chamber. The radiation emitting device may be disposed on the case and operated in a surface plasmonic mode or a waveguide mode for emitting a narrow bandwidth thermal radiation light source with multi-peak wavelengths into the chamber, wherein the multi-peak wavelengths may comprise a first absorption wavelength and a second absorption wavelength of the test gas. The photo detector may be disposed on the case for detecting light intensity of the light source passing through the chamber to determine the concentration of the test gas.
Abstract:
Provided are methods and systems for concurrent imaging at multiple wavelengths. In one aspect, a hyperspectral/multispectral imaging device includes a lens configured to receive light backscattered by an object, a plurality of photo-sensors, a plurality of bandpass filters covering respective photo-sensors, where each bandpass filter is configured to allow a different respective spectral band to pass through the filter, and a plurality of beam splitters in optical communication with the lens and the photo-sensors, where each beam splitter splits the light received by the lens into a plurality of optical paths, each path configured to direct light to a corresponding photo-sensor through the bandpass filter corresponding to the respective photo-sensor.
Abstract:
A sensor apparatus for measuring characteristics of optical radiation has a substrate and a low profile spectrally selective detection system located within the substrate at one or more spatially separated locations. The spectrally selective detection system includes a generally laminar array of wavelength selectors optically coupled to a corresponding array of optical detectors. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
Abstract:
A multiband camera comprises: a band-pass filter having four or more optical filters; a microlens array having arrayed microlenses; a photoelectric conversion element including a plurality of pixels; and a measurement unit for measuring spectral intensity. The multiband camera satisfies the expression below, where Pl is a pitch between the microlenses, Ps is a pitch between the pixels, n is a number of pixels corresponding to one microlens, u is an effective dimension in a prescribed direction of the pixels, t is a dimension in the prescribed direction of a real image that the band-pass filter forms on a plurality of two-dimensionally arrayed pixels, Na is a number of microlenses arrayed in the prescribed direction, L is a distance from an exit pupil to the microlens, and f is a focal length of the microlens. [ Expression 14 ] ( 1 - f L ) nPs - 3 Ps - u - t Na ≤ Pl ≤ ( 1 - f L ) nPs + 3 Ps - u - t Na
Abstract translation:多频相机包括:具有四个或更多个滤光器的带通滤波器; 具有阵列微透镜的微透镜阵列; 包括多个像素的光电转换元件; 以及用于测量光谱强度的测量单元。 多频段相机满足下面的表达式,其中P1是微透镜之间的间距,Ps是像素之间的间距,n是与一个微透镜相对应的像素数,u是像素的规定方向上的有效尺寸,t 是带通滤波器在多个二维排列的像素上形成的实际图像的规定方向上的尺寸,Na是沿规定方向排列的多个微透镜,L是从出射光瞳到 微透镜,f是微透镜的焦距。 [表达式14](1-f L)nPs - 3 Ps - u - t Na≤Pl≤(1-f L)nPs + 3 Ps - u -
Abstract:
A system and method for detecting analytes using a conformal filter. A conformal filter, which may comprise a tunable filter, is configured to filter interacted photons conforming to a spectral shape correlated with an analyte of interest. Conformal filter configurations may be selected by consulting a modified look-up table associated with an analyte. An iterative methodology may be used to calibrate a conformal design for an analyte of interest, refine a previous conformal filter design for an analyte of interest, and/or generate a new conformal filter design for an analyte of interest.