El il·luminància metre's operant teoria i aplicació tecnologia són revelats.
El il·luminància metre és an automàtica impressió òptica fibra i an òptica prova instrument per mesurar el intensitat de llum artificial i llum natural. It resold el problema de continu/mesura de llum intensitat i automàtica enregistrament. It és composed of a fotodetector, an automatic gear shifting amplificador circuit, a corba enregistrament dispositiu, a digital impressió dispositiu i an instantani digital display dispositiu. The curve recording device adopts the optical fiber frictionless recording method, and the photodetector is composed of a filter and a blue silici photocell, so that the visible spectrum response curve conforms to the human visual spectrum curve stistid by the International Commission on Illumination (CIE).
A pocket electronic illuminance meter belongs to the technical field of illuminance measurement and is suitable for measuring illuminance during agricultural production, daily life, and outdoor travel. It adopts a photoresistor as a photoelectric conversion device, which 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 connected in series at the output end of the DC power supply. The utility model avoids the use of a photometric head, and the DC power supply only uses a 3V battery. The decoder, display driver and display are integrated on an integrated circuit card, making it simple in structure, small in size, easy to move, and has the advantages of sensitive response. The utility model relates to an ultraviolet radiation illuminance meter, which belongs to optical testing instruments. It is characterized by two one-way cut-off optical filters and two identical photoelectric receivers to form a double-light detector. The circuit part adopts double-way amplification, so that the radiation value of the required test band can be accurately measured, and the stray light cut-off is very strong.
The test principle of the illuminance meter: the illuminance is the area density of the luminous flux received on the illuminated plane. The illuminance meter is an instrument used to measure the illuminance on the illuminated surface, and it is one of the most widely used instruments in illuminance measurement.
The structural principle of the illuminance meter: The illuminance meter consists of two parts: a photometric head (also known as a light rebre probe, incluint a receiver, a V(λ) pair filter, and a cosine corrector) and a reading display.
