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The spectral character circuit of light filter

2017-02-27 21:14  
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The spectral character circuit of light filter
The sensor consists of the shell, light filter, heat electric element PZT, FET pipe, resistor and diode,etc. The light filter is installed at the window, which forms a infrared window. The light filter is a multi-film interference filter of 6μm, this filter has a high reflection ratio on sunlight and daylight lamp light that the short wave is under 5μm, but it has a high penetration on the infrared ray source(10μm) which is emitted by human bodies and higher than 6μm, the spectral characters are as shown in figure 26-62.