Abstract:
A device (20) determines an optical intensity of light emanating from a sample (22) situated under periodically varying ambient light (34). The device (20) includes a selectively illuminating light source (26a, 26b) that can be switched between on and off states that illuminates the sample (22). A detector (36) detects the optical intensities of the sample (22) a first plurality of times with the effects of the illuminating light source (26a, 26b) to produce a plurality of collective light intensity measurements, and a second plurality of times without the effects of the light source (26a, 26b) to produce a plurality of ambient light intensity measurements. A processor quantitatively determines, based upon the multiple collective intensity measurements and the multiple ambient light intensity measurements, the intensity amount of each of the collective light intensity measurements that results from the illuminating source (26a, 26b).
Abstract:
Die Erfindung betrifft ein System zum Erfassen elektromagnetischer Strahlung mit einem Sensor, mit einer Auswerteeinheit, die mit dem Sensor verbunden ist, wobei der Sensor die elektromagnetische Strahlung erfasst und an die Auswerteeinheit weiter leitet, die mit einem Erkennungsmittel verbunden ist, wobei das Erkennungsmittel einen Signalanteil der elektromagnetischen Strahlung, der eine festgelegte Wiederholfrequenz aufweist, aus der vom Sensor erfassten elektromagnetischen Strahlung als Störsignal erkennt und gegebenenfalls aus der erfassten Strahlung entfernt.
Abstract:
The invention relates to a method and a device for determining a light signal additive to sunlight. The device according to the invention comprises: means (2) for collecting light coming from an object, the collected light comprising solar light (5) reflected by the object (4) and an additive light signal (6); means (10, 15, 17) for measuring, for at least first and second atmospheric absorption lines, a signal that depends on the intensity of the collected light at a wavelength of the line; means (11) for determining, from the measured signals, a signal that depends on an intensity of the additive signal at a wavelength of the first line. The invention also relates to a method employed in a device according to the invention. The device or the method according to the invention does not require measurement on reference sunlight without the additive signal close to the first line. Application more particularly to the measurement of a fluorescence signal emitted by vegetation.
Abstract:
The present invention provides systems and methods for attenuating the effect of ambient light on optical sensors and for measuring and compensating quantitatively for the ambient light.
Abstract:
Disclosed herein is a point-of-purchase (POP) spectrophotometer for open-viewing of a color sample. The POP spectrophotometer includes a housing assembly containing an illumination optical system and an imaging optical system in desired orientation. Also provided is at least one of a second illumination optical system, a sheen detection system, and a camera system. The housing assembly includes a chassis in secure arrangement with a plurality of supports that define a target plane having a target location and that space the chassis therefrom. The chassis is configured to position the illumination, imaging, sheen detection, and/or camera systems in desired orientations relative to the target location and each other. The POP spectrophotometer can include an alignment device and/or targeting optics for facilitating user-identification of the target location, and means can be provided to enhance insensitivity to ambient light and/or depth variation of the color sample.
Abstract:
Disclosed herein is a point-of-purchase (POP) spectrophotometer for open-viewing of a color sample. The POP spectrophotometer includes a housing assembly containing an illumination optical system and an imaging optical system in desired orientation. Also provided is at least one of a second illumination optical system, a sheen detection system, and a camera system. The housing assembly includes a chassis in secure arrangement with a plurality of supports that define a target plane having a target location and that space the chassis therefrom. The chassis is configured to position the illumination, imaging, sheen detection, and/or camera systems in desired orientations relative to the target location and each other. The POP spectrophotometer can include an alignment device and/or targeting optics for facilitating user-identification of the target location, and means can be provided to enhance insensitivity to ambient light and/or depth variation of the color sample.
Abstract:
Die Erfindung betrifft ein System zum Erfassen elektromagnetischer Strahlung mit einem Sensor, mit einer Auswerteeinheit, die mit dem Sensor verbunden ist, wobei der Sensor die elektromagnetische Strahlung erfasst und an die Auswerteeinheit weiter leitet, die mit einem Erkennungsmittel verbunden ist, wobei das Erkennungsmittel einen Signalanteil der elektromagnetischen Strahlung, der eine festgelegte Wiederholfrequenz aufweist, aus der vom Sensor erfassten elektromagnetischen Strahlung als Störsignal erkennt und gegebenenfalls aus der erfassten Strahlung entfernt.
Abstract:
The present invention provides systems and methods for attenuating the effect of ambient light on optical sensors and for measuring and compensating quantitatively for the ambient light.
Abstract:
A device (20) determines an optical intensity of light emanating from a sample (22) situated under periodically varying ambient light (34). The device (20) includes a selectively illuminating light source (26a, 26b) that can be switched between on and off states that illuminates the sample (22). A detector (36) detects the optical intensities of the sample (22) a first plurality of times with the effects of the illuminating light source (26a, 26b) to produce a plurality of collective light intensity measurements, and a second plurality of times without the effects of the light source (26a, 26b) to produce a plurality of ambient light intensity measurements. A processor quantitatively determines, based upon the multiple collective intensity measurements and the multiple ambient light intensity measurements, the intensity amount of each of the collective light intensity measurements that results from the illuminating source (26a, 26b).