RESEARCH OF LEDS AS PHOTOSENSORS

Abstract

In devices for measuring photovision applied sensors on the basis of photoresistors, photodiodes, vacuum and gas-filled photocells. These photosensors have to add filters and system filters. On the experimental data found that as of photosensors, you can use the LEDs. In laboratory tests, the LEDs of different colors of light react to individual optical radiation. LEDs are not sensitive to radiation with a wavelength longer than at which they emit light. Established that the maximum sensitivity of all LEDs a bit is shifted into the region of shorter wavelength than which the led emits. On the basis of led sensors can make the light meter, RGB-sensors, photosynthesis active radiation and measuring the near UV radiation. With the function of relative spectral luminous efficacy of monochromatic radiation for night vision coincides sensitivity of yellow led with a wavelength of 590 nm. With the function of relative spectral luminous efficacy of monochromatic radiation for daylight vision matches the sensitivity of red LEDs with a wavelength of 625 and 628 nm. To create RGB sensors need LEDs with operating wavelengths 660, 625 and 525 nm. There is no need to use corrective filters.