Introduction
Radiation Efficiency (ηe)
?? The radiation flux (power) of the radiation source is transmitted to the power consumption.
Comparison method
Measuring the ball measurement of ultraviolet light source radiation efficiency method
below is a comparative method: < / p>
The so-called comparative method is to compare the tensile light of the lamp with the test lamp with the standard lamp that is calibrated and known to UV radiation flux. The receiver of the ball is switched to the photoelectric multiplication tube (GD one 5 or SH2), and the corresponding filter of the ZWB series is added to the front of the receptacle to filter out visible light. Although the ZWB series filter can pass through the infrared energy, the photoelectron is not responding to the infrared line, so the receiver only receives the ultraviolet radiation portion of the light source. The specific measurement method is to ignite the lamp in the integration ball. When the lamp is stabilized, open the shutter of the Ball window, so that the measured light is irradiated onto the receiver, and a photovate value I1 is generated in the receptacle, Or voltage U1,). Then take the test light, replace the standard light, this standard lamp shall be determined by the national metering department on the spectrophotometer, which has been calibrated, and the total radiation flux of φ :. Take this standard lamp to ignite stable in the ball, then Open the window shutter to illuminate the standard lamp to the receptacle, generate a photocurrent I2. Then, the ultraviolet radiation flux φ measured twice and the ultraviolet radiation φ of known standard lamps, and the absolute radiant flux φ1 of the ultraviolet light source is measured in the ultraviolet band, that is,
Φ1 = I1 / I2 * φ2
After calculating the ultraviolet total radiant flux φ1 (watt) of the lamp, the ultraviolet radiation efficiency of the ultraviolet source can be calculated, that is, The input total electric power P1 of the light source is removed φ1 to obtain the radiation efficiency η of the UV source, namely:
η = φ1 / p1 (%)
Ultraviolet light source radiation efficiency η It is to indicate that when the electric power in the input light is 100 watts, the light radiation is a certain wavelength of ultraviolet power to how many watts. For example, 254 nm of low pressure mercury lamp, the ultraviolet radiation efficiency is 60%. The radiation efficiency η value is an important parameter to measure an ultraviolet light source. It shows that the size of the electro-optical conversion efficiency value of the ultraviolet light source is compared to the ultraviolet light source. An important indicator of quality and unity. Therefore, this measurement is very necessary to develop the light source