Abstract:
Disclosed is a sensor shield (6, 6a,6b) for use in a multi-shelf merchandise display unit (1) including a plurality of sensors (5,5a,5b) mounted on a wall (4) of the unit (1) and opposite a source of illumination (2), in which each sensor (5,5a,5b) corresponds to a single shelf (3,3a,3b) and in which the shelves (3,3a,3b) are at least semi-porous to the illumination. The shield (6, 6a,6b) comprises i) a plate having a length that is sufficient substantially to reduce or prevent incident illumination from the shelf (3,3a,3b) above reaching the sensor (5,5a,5b); and ii) means (26) n to attach the plate to casing of or around the sensor (5,5a,5b) or the wall (4) of the unit (1). The plate is opaque to the illumination detected by the sensor (5,5a,5b). Also disclosed is a method to reduce the interference of light in a multi-shelf merchandise display unit (1) from shelves (3,3a,3b) above a shelf (3,3a,3b) on which stock levels are being measured and a method for monitoring stock levels in a retail display cabinet by measuring light entering the retail display cabinet.
Abstract:
An apparatus comprises a transparent substrate (3), at least one sensor (5) for the detection of electromagnetic radiation (31), and for each sensor a corresponding mirror having a reflective surface (11). The reflective surface (11) is shaped so that electromagnetic radiation (31) incident on the transparent substrate (3) at a specific angle, passing through the transparent substrate (3) and being reflected by the reflective surface (11) is directed towards the sensor (5). The sensor (5) comprises a two dimensional material like graphene and may be a quantum dot functionalised graphene field effect transistor. The present invention enables the incident electromagnetic radiation (31) to be focussed onto the at least one sensor (5) without the use of additional optical components like lenses or microlenses. This may enable focussed images to be obtained by the apparatus.
Abstract:
A photocell receptacle (100) includes a base (110) configured to be fixedly mounted to a housing (102) of a light fixture (104). The base has an opening (214) providing access to the interior of the housing of the light fixture. The base has a base locking feature (230). The photocell receptacle includes a cap (112) having a cap locking feature (270). The cap locking feature operably engaging the base locking feature to secure the cap to the base. The cap is variably positionable at different angular positions relative to the base. The cap has contact channels (258) holding electrical contacts (260) configured to be electrically connected to corresponding contacts (264) of a photocell (106).
Abstract:
This invention is directed to reliably condensing weak light by a sensor arranged at a position spaced apart from a processing position. The optical processing head includes a light guide that guides light for irradiating a processing position. The optical processing head further includes a light transmitter that has one end arranged near the distal end of the light guide and the other end connected to a photodetector, condenses reflected light traveling from the processing position, and transmits it to the photodetector. The optical processing head includes at least one light transmitter as its feature.
Abstract:
Disclosed is a sensor shield (6, 6a,6b) for use in a multi-shelf merchandise display unit (1) including a plurality of sensors (5,5a,5b) mounted on a wall (4) of the unit (1) and opposite a source of illumination (2), in which each sensor (5,5a,5b) corresponds to a single shelf (3,3a,3b) and in which the shelves (3,3a,3b) are at least semi-porous to the illumination. The shield (6, 6a,6b) comprises i) a plate having a length that is sufficient substantially to reduce or prevent incident illumination from the shelf (3,3a,3b) above reaching the sensor (5,5a,5b); and ii) means (26) n to attach the plate to casing of or around the sensor (5,5a,5b) or the wall (4) of the unit (1). The plate is opaque to the illumination detected by the sensor (5,5a,5b). Also disclosed is a method to reduce the interference of light in a multi-shelf merchandise display unit (1) from shelves (3,3a,3b) above a shelf (3,3a,3b) on which stock levels are being measured and a method for monitoring stock levels in a retail display cabinet by measuring light entering the retail display cabinet.
Abstract:
Disclosed is a solar sensor comprising a first modulator (1) that is permeable to electromagnetic waves within a certain spectrum, an additional modulator (2) which is no more than slightly permeable to the electromagnetic waves within said spectrum, and a photo detector (3) which receives the electromagnetic waves and is covered by the first modulator. The additional modulator is disposed on the outside of the first modulator, partially covers the first modulator, and is provided with a belt-shaped area (2a), the width (w) of which varies.