Abstract:
An embodiment of a method for processing light sensor signals comprises illuminating a clear sensor (CS) and a color sensor (RS, GS, BS) of a light sensor system with a test light having a test spectrum. Therein the color sensor (RS, GS, BS) comprises an optical filter and is designed to sense light with a wavelength within a pass band of the filter and the test spectrum has components outside of the pass band. A clear test signal which is generated by the clear sensor (CS) and a color test signal which is generated by the color sensor (RS, GS, BS) are received. Then a first transmission value (T) is determined based on the clear test signal and on the color test signal. Finally, a compensation factor (Kr, Kg, Kb) is calculated based on the first transmission value (T) and on a nominal transmission value (Tn) of the filter.
Abstract:
Controlled optical sensor device (10; 100) comprising an optical emitter (21) generating optical radiation (23), in particular in the visible or infrared field, and an optical receiver (22) to detect said optical radiation (23) upon interaction with a medium to be measured (24), a driving current (CTU; Ip) of said optical emitter (21) setting the intensity of said radiation (23) being controlled by driving means (50, 40). According to the invention, this device comprises a circuit (30) for conditioning the output signal supplied by the optical receiver (22) including an amplifier (31) to which said output signal (52) of the optical receiver (22) is supplied as input voltage (Vin) of the amplifier (31), said amplifier (31) including a feedback network (310) configured to determine a gain (G) of the amplifier (31) and to supply a reference voltage (Vref), said amplifier (31) being configured together with said feedback network (31) to supply an output signal (Vo) of the amplifier (31) which is a function of the difference between the reference voltage and the difference, multiplied by the gain (G), between said reference voltage (Vref) and said input voltage (Vin) of the amplifier (31).
Abstract:
A radiation sensor is provided comprising: first and second pixels; and a radiation absorption filter positioned over the first pixel. The combined spectral response of the absorption filter and the first pixel have a first pixel pass-band and a first pixel stop-band. The radiation sensor further comprises an interference filter positioned over both the first and second pixels. The interference filter has a first interference filter pass-band substantially within the first pixel pass-band and a second interference filter pass-band substantially within the first pixel stop-band.
Abstract:
Systems and methods for simultaneous optical testing of a plurality of devices under test. These systems and methods may include the use of an optical probe assembly that includes a power supply structure that is configured to provide an electric current to a plurality of devices under test (DUTs) and an optical collection structure that is configured to simultaneously collect electromagnetic radiation that may be produced by the plurality of DUTs and to provide the collected electromagnetic radiation to one or more optical detection devices. The systems and methods also may include the use of the optical probe assembly in an optical probe system to evaluate one or more performance parameters of each of the plurality of DUTs.
Abstract:
A system and/or a method read, measure and/or control intensity of light emitted from a light-emitting diode (LED). A light detector may be located in a position adjacent to the LED for reading and/or measuring the intensity of light emitted from the LED. The LED and the light detector may be located in a cavity which may limit exposure of the LED and the light detector to ambient light. The cavity may have an aperture for allowing light emitted from the LED to exit the chamber to illuminate an environment in which the chamber is located. The aperture may be located between the cavity and a compartment, and the LED may emit light through the aperture into the compartment. An additional detector may be located in the compartment and/or may extend from the cavity through an additional aperture into the compartment.
Abstract:
The present invention relates to a spectral detection device (100) for detecting spectral components of received light, wherein the spectral detection device (100) comprises a filtering structure (110) arranged to filter the received light and output light with a wavelength within a predetermined wavelength range; and a light sensor (120) arranged to detect the light output by the filtering structure (110), wherein the filtering structure (110) is variable to allow a variation of the predetermined wavelength range over time. The arrangement enables a compact spectral detection device that may be provided at a low cost.