The principle of illuminance meter and the application of the technology revealed
Many people may not really understand the illuminance meter, and even do not know its principle, as well as its application technology, take a look below:
The illuminance meter is a kind of automatic printing optical fibre, which is an optical test instrument for measuring the intensity of artificial and natural light, and it solves the problem of continuous measurement of light intensity and automatic recording. It is composed of a light detector, an automatic shift amplification circuit, a curve recording device, a digital printing device and an instantaneous digital display device, in which the curve recording device adopts the frictionless recording method of optical fibre, and the light detector is composed of a filter and a langsilicon photoelectric cell, so that the visible spectral response curve is in line with the visual spectral curve of the human eye as stipulated by the International Commission on Illumination (CIE).
The pocket electronic illuminance meter belongs to a kind of illuminance measurement technology field, which is suitable for measuring illuminance in agricultural production, daily life and outdoor travelling. It adopts a photoresistor as a photoelectric conversion device, and it contains a DC power supply, a voltage conversion circuit, a switch, a photoresistor, a test circuit, an A/D converter, a decoder, a display driver, and a display in series in turn at the output of said DC power supply. The utility model avoids the use of photometric head, the DC power supply can be used only with a 3V battery, the decoder, the display driver and the display are integrated on an integrated circuit card, making it simple in structure, small in size, easy to move, and also has the advantages of sensitive response. A kind of ultraviolet radiation illuminance meter, belongs to optical test instrument. It is characterised by two unidirectional cut-off optical filters and two identical photoelectric receivers constitute a double optical circuit detector, the circuit part of the double amplification, so as to be able to accurately measure the radiation value of the required test band, stray light cut-off is very strong!
Illuminance meter test principle: illuminance is the illuminated plane to receive the luminous flux of the surface density. Illuminance meter is used to measure the illuminance of the illuminated surface of the instrument, is one of the most used instruments in the measurement of illuminance.
Illuminance
The structural principle of illuminance meter: illuminance meter by the photometric head (also known as the light probe, including the receiver, V (λ) on the filter, cosine corrector) and reading display two parts.
