Abstract:
This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes a number of apertures, and devices for opening and shutting the apertures. A light directing arrangement includes at least one light turning feature. The display lighting system is configured to emit visible light and infrared (IR) light through at least a first opened one of the plurality of apertures. The light turning feature is configured to redirect IR light emitted through the opened aperture into at least one lobe, and to pass visible light emitted by the display lighting system through the opened aperture with substantially no redirection.
Abstract:
The invention provides a method for measuring light scattered on a sample in a medium, in particular a fluid medium, that comprises the following steps: providing a rotatably arranged measuring cell with a substantially circular cross-section in a plane perpendicular to the axis of rotation for receiving the medium and the sample, rotating the measuring cell, preferably at least once by substantially 360°, about the axis of rotation, in particular by means of a drive, emitting a laser beam by means of a laser onto the sample located within the measuring cell in the plane perpendicular to the axis of rotation at different angles of rotation of the measuring cell, the measuring cell maintaining its position in the direction of the axis of rotation, detecting scattered light signals by means of at least two detectors arranged in a circle and concentrically to the centre of rotation of the measuring cell and fixed within set, different angular ranges at different angles of rotation of the measuring cell, and determining a corrected signal value for each detector on the basis of the scattered light signals detected at different angles of rotation of the measuring cell for each detector. Furthermore, the invention provides an apparatus for measuring light scattered on a sample according to the method comprising a laser, a measuring cell and a detector.
Abstract:
To create a broad band spectrometer, a plurality of individual antenna based bolometers are fabricated on the surface of a single spectrometer chip, each bolometer having an individual antenna which is sized differently from all others, thus being responsive to a generally unique frequency of radiation. Each antenna is coupled to a related transistor, which is easily formed using CMOS technology. The antennas are connected to opposite sides of a transistor gate, thus creating a termination resistor for the particular antenna. Multiple outputs from the various antennas are then coupled, thus providing responsiveness to electromagnetic radiation of a very broad spectrum.
Abstract:
High efficiency method of detecting incident photons including illuminating a laser driven gaseous vapor with electromagnetic radiation enabling the excitation of an atom of the vapor upon absorption of an incident photon by the atom, introducing the incident photons into the vapor which is constituted to absorb the incident photons which in response, generates atomic fluroescence to in turn produce a long steam of secondary photons upon the absorption of an incident photon by an atom of the vapor and detecting the long stream of secondary photons with an ordinary low efficiency photo-detector.
Abstract:
An optical filter and detector, and a related method for its operation, in which signal photons are admitted into a detector cell and selectively excite atoms or molecules of a vapor to a selected metastable state. An illuminating laser then photoionizes a large proportion of the excited atoms or molecules, and the resulting free electrons are collected as a measure of the number of incident signal photons. The initial excitation step to a metastable state is highly sensitive to the wavelength of the signal photons and therefore acts as a narrowband filter.
Abstract:
This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes a number of apertures, and devices for opening and shutting the apertures. A light directing arrangement includes at least one light turning feature. The display lighting system is configured to emit visible light and infrared (IR) light through at least a first opened one of the plurality of apertures. The light turning feature is configured to redirect IR light emitted through the opened aperture into at least one lobe, and to pass visible light emitted by the display lighting system through the opened aperture with substantially no redirection.
Abstract:
A method and an apparatus for detecting the wavelength of a laser beam by utilizing an optogalvano effect based upon atoms or molecules in the plasma. Atoms or molecules in the plasma are irradiated with a laser beam. The impedance of the plasma at this moment is detected to determine whether the wavelength of the laser beam is in agreement with a predetermined absolute wavelength. The result of detection is used for controlling the wavelength of the laser beam.