Study of Measurement Technique of Anti-Infrared Radiation of Glasses

• Main Author: 何孟謙
• Other Authors: 陳德請
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/49s29n

碩士 === 逢甲大學 === 光電能源與視覺科技碩士在職專班 === 105 === Measurement technique of anti-infrared radiation of glasses (MTARG) is a novel method used to measure how much radiant energy a substance absorbs at three wavelengths of infrared spectrum. Transmittance (T) is defined as the fraction of incident light which is transmitted, ie, passes through the glasses. The MTARG device is an E-O transceiver that measure the transmittance of glasses comprises a transmitter, a receiver and processor (including display) that are combined and share common circuitry or a single housing. The transmitter consists of three optical transmitters, which may be fixed to single wavelength. Each optical transmitter consists of a light source, driver circuit, a light modulator and may also include an optical filter. In transmitter light sources, the wavelength of the hard carbon film IR source, InGaAs laser diode and GaAlAs /GaAs laser diode was 3~5μm, 1.55μm and 980nm,respectively. The receiver may consist of a filter followed by an InGaAs photodiode, amplifier and a de-multiplexer followed by the thermopile. The experimental results showed accuracy of transmittance was 0.1%.The specification of this device are: (1) detection wavelength range from 3μm to 5μm, (2) IR source working from 2.6V to 6.4V, (3) Transmittance measurement range from 0% to100% and (4) the reading circuit sensitivity 0.019 mV/℃.