Motionless system to measure relative angular emission intensity of decaying or modulated light emitting diodes

作者：Radziwon M^*; Hernandez Sosa G; Lackner C; Sitter H; Simbrunner C

来源：Review of Scientific Instruments, 2014, 85(10): 103103.

DOI：10.1063/1.4897191

In this paper, a measurement system is presented which enables fast and accurate determination of the relative angular emission intensity of light emitting devices, taking into account their specific features such as low light output, narrow spectral distribution, high spatial luminous intensity ratios, and small dimensions. Application of logarithmic sensors allows for fast measurement of relative emission by simple analog circuitry, while locating 18 of them on a fixed ring around the emitter allows a motionless measurement system. As a result, the proposed system can determine the relative angular emission in less than 100 ms with a resolution of 5 degrees for symmetric emitters.

• 出版日期2014-10