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The C5840-10 Near Infrared Camera is a 2/3-inch camera with high sensitivity in the visible to the1,650 nm near infrared region. It eliminates the non-linearity of the input and output that was a problem with conventional infrared vidicon cameras, as well as suppressing lag and drift. This camera is ideal for semiconductor lasers for optical communications, and for fiber testing and evaluation. The C5840-10 is configured so that the image converter and CCD element are coupled by an FOP (fiber optic plate). When infrared light strikes the photocathode of the image converter, photoelectrons proportionate to the volume of light are released. The photoelectrons are accelerated and collide with the phosphor screen of the output surface, producing visible light. The intensity of the fluorescence is proportional to the number of photoelectrons. The fluorescence passes through the FOP and is imaged by the CCD element. This series of actions is entirely linear, so the infrared light can be measured at gamma = 1. |
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