Infrared Isolation Effectiveness of Car Windows Film Tester

摘要：

This paper introduces the circuit and working principle of the infrared isolation effectiveness of car windows film tester. The circuit of the tester was constituted mainly by frequency modulating infrared light source,silicon photovoltaic cells,I/V convenor,A/D convenor and so on. The infrared wavelength range of the infrared light source is broader than the single infrared LED testing,which use two different wavelengths of infrared LED light sources to form composite wavelength light source. The methods which the circuit uses based on frequency domain is to suppress the interference of the stray light signal. When the light path is open,the actual measurement show that,the maximum difference is only 0.8% between the test result in sunlight and that in the darkroom. This paper also gives the test results and its analysis of which the 25 kinds of car windows films which are tested by the prototype machine.

关键词： car windows film infrared ray isolation effectiveness test suppress interference.

作者: Yongqing Wang Zhipeng Zhang Suoliang Zhang Hong Wang

作者单位: College of Electronic & Information Engineering,Hebei University.Hebei Baoding,071002 Central Iron & College of Electronic & Information Engineering,Hebei University.Hebei Baoding,071002

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 1803-1807

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）