Abstract:
An optical measurement system (100) includes an integrating sphere (110) having a reflecting surface (110a) on its inner wall and having a first window (132). The optical measurement system further includes a support member (120) for supporting a light source at a substantially central position of the integrating sphere, and a first baffle (136) arranged on a line connecting the first window and the light source supported by the support member. The support member is connected, in a region opposite to the first window with respect to the light source, to the inner wall of the integrating sphere.
Abstract:
Disclosed is a method for correcting the temperature sensitivity of the amount of light L emitted by a light emitting diode (LED) and measured in a light detector, said LED being operated in a pulsed mode with an essentially constant pulse duration tP. According to the inventive method, a predetermined parameter X that has a predetermined ratio to the temperature T of the LED is used while a corrective factor K is determined from said parameter X, preferably using a calibration table, most preferably a closed, predetermined function, with the aid of which the measured emitted amount of light L is corrected by the temperature-dependent variations of the emitted amount of light. The parameter X is determined from at least two output signals of the LED which are correlated in a predetermined manner.
Abstract:
Es wird eine optoelektronische Vorrichtung vorgestellt, welche wenigstens einen optoelektronischen Sender und wenigstens einen optoelektronischen Empfänger aufweist. Die optoelektronische Vorrichtung weist ferner eine Speichereinrichtung mit wenigstens einem nicht-flüchtigen Speicher auf, der dazu angepasst ist, einen individuellen Datensatz zu speichern. Ferner ist eine Datenschnittstelle vorgesehen, die dazu angepasst ist, den individuellen Datensatz zumindest teilweise aus dem nicht-flüchtigen Speicher der Speichereinrichtung auszulesen.
Abstract:
A calibration method comprising, for each of one or more light sensors: (a) under influence of one or more substantially non-zero illumination levels in the target environment, using the light sensor to measure the sensed light level corresponding to each of these one or more illumination levels; (b) receiving a template light level value corresponding to each of the one or more illumination levels, representing the light level at a target location in the target environment substantially removed in space from the location of the light sensor, each of the one or more template light level values being assumed for the environment rather than measured by a light meter; and (c) determining a relationship between the sensed light level and the light level experienced at the target location, based on an evaluation of the one or more sensed levels relative to the one or more template light level values.
Abstract:
The present invention provides methods and systems for measuring optical power that require neither alterations to the optical fiber nor physical contact with the optical fiber, the system including an optical fiber configured to propagate an optical signal, wherein the optical fiber includes a core and at least a first cladding layer, wherein a portion of the optical signal scatters out of the optical fiber along a length of the optical fiber to form scattered fiber light; a detector system configured to receive the scattered fiber light along the length of the optical fiber and to output a detection signal based on the received scattered fiber light; and a processor configured to receive the detection signal and to determine a power value of the optical signal based on the received detection signal.