Abstract:
L'invention concerne un dispositif d'imagerie multispectrale comportant : - un détecteur DET photosensible formé d'une matrice de pixels, - un réseau de microlentilles ML1, ML2, ML3 répliquant cette matrice de pixels, - un module de filtrage MF formé d'une matrice de filtres élémentaires λ1, λ2, λ3 répliquant cette matrice de pixels, Le dispositif est remarquable en ce que le réseau de microlentilles étant agencé directement au contact du détecteur DET, le module de filtrage MF est réalisé sur un substrat SS qui est rapporté au contact du réseau de microlentilles.
Abstract:
Color calibration for digital pathology is provided. A standard glass slide is prepared with a specimen having zero or more stains. The specimen is scanned a first time using a hyperspectral imaging system to produce a first digital image having XYZ color values. The specimen is scanned a second time using a digital pathology imaging system to produce a second digital image having RGB color values. The first and second digital images are then registered against each other to align the digital image data. Individual pixels of the first and second images may be combined in the registration process so that the first and second digital images have substantially similar pixel sizes. A lookup table is generated to associate XYZ color values to RGB color values. Once the lookup table has been generated, it can be used to present RGB color on a display using the corresponding XYZ color.
Abstract:
We disclose an array of Infra-Red (IR) detectors comprising at least one dielectric membrane (2, 3) formed on a semiconductor substrate comprising an etched portion; at least two IR detectors (4, 5), and at least one patterned layer (7) formed within or on one or both sides of the said dielectric membrane for controlling the IR absorption of at least one of the IR detectors. The patterned layer comprises laterally spaced structures.
Abstract:
Online calibration of laser performance as a function of the repetition rate at which the laser is operated is disclosed. The calibration can be periodic and carried out during a scheduled during a non-exposure period. Various criteria can be used to automatically select the repetition rates that result in reliable in-spec performance. The reliable values of repetition rates are then made available to the scanner as allowed values and the laser/scanner system is then permitted to use those allowed repetition rates.
Abstract:
The present invention relates to an optical module (10), comprising an inside volume and an optical housing enclosing said inside volume, said optical housing being, except for one or more input optical ports (1), completely non-transparent, such that light can enter said inside volume solely through said one or more input optical ports, said inside volume further comprises one or more diffractive elements (6), wherein the diffractive elements transform a portion of an input optical signal into an output optical signal according to the spectral and spatial transformation information, the input optical signal propagating within the optical housing from one or more input optical ports, the output optical signal propagating within the optical housing to an optical output region of the optical element, and at least one photo detector (12) is positioned for receiving at least a portion of the output optical signal from at least a portion of the optical output region, wherein said one or more diffractive elements are a grating assembly composed of several gratings, wherein each grating is designed for a specific wavelength range and optimum wavelength within said range, and wherein said at least one photo detector is a 2D image sensor.
Abstract:
The present disclosure provides a method of providing a hyperspectral image of a scene comprising a point (p). The method comprises providing an imaging device (10, 10') comprising a two-dimensional image sensing unit (12, 13, 14) having a spectral characteristic, which varies along at least one direction in a plane parallel with an image sensor (13), acquiring a first two-dimensional image (11) of the scene, the first image comprising the point (p), wherein the spectral content of the scene varies along the direction as a consequence of the varying spectral characteristic of the image sensing unit (12, 13, 14), moving the imaging device (10, 10') and the scene relative to each other, acquiring a second two-dimensional image (I2) of the scene, the second image comprising the point (p), wherein the spectral content of the scene varies along the direction as a consequence of the varying spectral characteristic of the image sensing unit (12, 13, 14), identifying the point (p) in the second image (I2) as a second pixel at a position (x2, y2) depicting the point (p), providing a spectral vector (S(p)) of the point, and providing an updated spectral vector (S'(p)) of the point based on an applicability vector (A(p)) of the point (p), the spectral vector (S(p)) of the point, a spectral value (z2(p)) of the second pixel and an applicability vector (B(p)) of the second pixel.
Abstract:
An interferometer system comprising an optical detector including a substrate and a two-dimensional array of pixels disposed on the substrate is provided. The interferometer system may further comprise an interferometer disposed proximate the optical detector without an optical element between the interferometer and the optical detector. The interferometer may include a first plate positioned proximate the substrate and extending over the two-dimensional array of pixels, a second plate spaced apart from the first plate, the first and second plates defining an optical gap between them, and at least one actuatable spacer positioned between the first plate and the second plate and configured to space apart the first and second plates from one another and to selectively alter a thickness of the optical gap.
Abstract:
Increased sensitivity of spectrometers through reducing noise in independent voltage signals via a differential voltage analyzer utilizing a reference wavelength from a wavelength region in which the optical absorption of the sample is negligible. In an embodiment, a grating permits selection of a reference wavelength. In another embodiment, filters permit selection of a reference wavelength. In yet another embodiment, both a grating and a filter permit selection of a reference wavelength. In an aspect, the differential voltage analyzer reduces noise by minimizing a differential voltage between the independent voltage signals and the reference voltage signal by adjusting the value of a cancellation coefficient.