Common terms and explanations for illuminometers
Luminous tile ": The energy emitted by a light source into space per unit of time that produces a sense of light is called" luminous flux ", and its unit is" lumen ". Lumen watt "is the pronunciation of" lumen/watt ", which refers to the ratio of the luminous flux emitted by a light source to the electrical power consumed, that is, the luminous efficiency of the light source.
"Mcd": The spatial density of luminous flux, which is the luminous flux per unit solid angle, called luminous intensity, is a measure of the intensity of light emitted by a light source. Its Chinese name is "candela", and the symbol is "cd". The previous'm 'is the prefix, meaning one thousandth (just like a unit of length, the Chinese name is' meter', its symbol is'm ', and adding another'm' before it becomes' mm 'becomes one thousandth of a meter, which is also a millimeter), so the Chinese pronunciation of' mcd 'is' millicandela'.
Illuminance "refers to the luminous flux per unit area of an object illuminated by a light source. Simply put, it refers to the degree to which the object is illuminated. The unit is "lux", and its symbol is "Lx
Long wavelength ultraviolet (UVA): With a wavelength of 400-320nm, its biological effect is weak, and it has a significant pigmentation effect that causes erythema reaction. It can cause fluorescence reactions in some substances (such as sodium fluorescein, tetracycline, quinine sulfate, hematoporphyrin, pseudomonas aeruginosa, and substances produced by certain fungi). It can also cause phototoxic reactions and photoallergic reactions. Medium wave ultraviolet (UVB): Wavelength 320-275nm, it is the active part of the biological effects of ultraviolet radiation. The effect of erythema reaction is very strong, which can convert vitamin D into vitamin D, promote epithelial cell growth and melanin production, and inhibit allergic reactions. Short Wave Ultraviolet (UVC): Wavelength 275-180nm, with a significant effect on erythema reaction and significant killing and inhibitory effects on viruses
