Abstract:
A light sensor arrangement comprising a stack having a light sensor (1), an optical filter (3), and a mask (2) between the light sensor (1) and the optical filter (3). In particular, the light sensor (1) comprises a light sensitive surface (11). The mask (2) comprises an upper opaque base (M3) facing away from the light sensitive surface (11) and having first apertures (AM3) each confining an optical path in the mask (2), respectively. The mask (2) further comprises a lower opaque base (M1) facing the light sensitive surface (11) and having second apertures (AM1), each confining the optical path in the mask (2), respectively. The upper and lower base (M1, M3) are made from metal. The optical paths are designed for allowing incident light to reach the light sensitive surface (11) when having an angle of incidence from an allowed interval of angles (INT) determined by the size of the first and second apertures (AM1, AM3) and defined with respect to an optical axis (OA) of the optical paths, respectively. A spectrometer is shown comprising at least light sensor arrangements of the afore-mentioned kind.
Abstract:
A spectrometer can include a plurality of semiconductor nanocrystals. Wavelength discrimination in the spectrometer can be achieved by differing light absorption and emission characteristics of different populations of semiconductor nanocrystals (e.g., populations of different materials, sizes or both). The spectrometer therefore can operate without the need for a grating, prism, or a similar optical component. A personal UV exposure tracking device can be portable, rugged, and inexpensive, and include a semiconductor nanocrystal spectrometer for recording a user's exposure to UV radiation. Other applications include a personal device (e.g. a smartphone) or a medical device where a semiconductor nanocrystal spectrometer is integrated.
Abstract:
The present disclosure relates to methods and systems for obtaining image information of an organism including a set of optical data; calculating a growth index based on the set of optical data; and calculating an anticipated harvest time based on the growth index, where the image information includes at least one of: (a) visible image data obtained from an image sensor and non-visible image data obtained from the image sensor, and (b) a set of image data from at least two image capture devices, where the at least two image capture devices capture the set of image data from at least two positions.
Abstract:
An imager contains an image sensor with laterally varying spectral response. The imager is scanned over a scene or object to form a spectral image. The spectral responses are repeated at different positions in the field of view so as to reduce the effect of scene nonidealities, such as angle dependence or temporal variation, on the spectral image data. A part of the image sensor may be used for conventional two- dimensional imaging. This part of the image sensor may be used to estimate the scene geometry and scan movement, enabling further improvement in the spectral integrity.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Farbkalibrierung eines Farbmonitors mit LED- Hintergrundbeleuchtung, bei dem mindestens ein Bereich eines am Farbmonitor (1) dargestellten Bildes aus der Entfernung ortsaufgelöst mit einem als Bild- oder Zeilensensor ausgebildeten Farbsensor (7) vermessen wird, ortsaufgelöst Abweichungen gemessener Farbwerte von Soll-Farbwerten bestimmt werden, und eine LED- Hintergrundbeleuchtung des Farbmonitors (1) zur lokalen Korrektur der Abweichungen angesteuert wird. Bei Integration des Farbsensors (7) in die Fernbedienung (2) eines Farbfernsehgerätes richtet der Benutzer lediglich die Fernbedienung (2) geeignet auf das Fernsehgerät aus, wodurch der Farbsensor (7) ein Testbild (3) des Farbfernsehgerätes erfasst und zur Bestimmung von Farbkorrekturen auswertet. Das Verfahren ermöglicht eine einfache Farbkalibrierung eines Farbfernsehgerätes ab Werk oder direkt beim Anwender.
Abstract:
A spectrometer can include a plurality of semiconductor nanocrystals. Wavelength discrimination in the spectrometer can be achieved by differing light absorption and emission characteristics of different populations of semiconductor nanocrystals (e.g., populations of different materials, sizes or both). The spectrometer therefore can operate without the need for a grating, prism, or a similar optical component. A personal UV exposure tracking device can be portable, rugged, and inexpensive, and include a semiconductor nanocrystal spectrometer for recording a user's exposure to UV radiation. Other applications include a personal device (e.g. a smartphone) or a medical device where a semiconductor nanocrystal spectrometer is integrated.
Abstract:
Examples of an imaging sensor include a two-dimensional staring sensor with spectral filter strips for multispectral overhead imaging. The sensor may also include a panchromatic sensor with block or strip filters. The sensor may be used to collect multispectral color image data at a sampling resolution from overhead imaging platforms such as airplanes or satellites. The sensor can be used to provide video images. If a panchromatic sensor is included, the sensor may be used to collect panchromatic image data. Examples of methods for processing the image date include using the panchromatic image data to perform multi-frame enhancement or panchromatic sharpening on spectral images to improve their quality and resolution.