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美国能源部桑迪亚国家实验室(Sandia National Laboratory)现已研制成一种警戒地区夜间电视监视用红外灯具。这种红外灯具只能发射出极近红外光(Very-near infrared),其波长范围为780～1100nm。换言之,它的输出人眼是看不见的,而只有电视摄象机才能够看得见。在没有惹人注目的照明设备条件下(这是警戒地区的特点),这种红外灯具可保证获得质量良好的电视图象。对于自作聪明的入侵者是看不见这种红外灯具的;另外,这种红外灯具也不会对邻近地区产生干扰。用于视野监视的闭路电视摄象机,其摄象管的灵敏波段为300～1100nm,也就是说摄象管能将这一波段范围的入射光变换成电视监视的显示信号,而红外灯具所发射的极近红外光则正好是在摄象管
The U.S. Department of Energy’s Sandia National Laboratory has now developed an infrared luminaire for night-time television surveillance in precautionary areas. This infrared light can only emit very-near infrared light (Very-near infrared), the wavelength range of 780 ~ 1100nm. In other words, the output of the human eye is invisible, and only the video camera can see. In the absence of eye-catching lighting (which is characteristic of the precautionary area), this infrared luminaire guarantees a good quality television image. For such a smart intruder can not see this infrared light; In addition, this infrared light will not interfere with neighboring areas. CCTV camera for field of vision monitoring, the sensitivity of the camera tube for the band 300 ~ 1100nm, which means that the tube can transform this range of incident light into television monitoring of the display signal, and infrared lamps Very near infrared light is emitted in the camera tube