Abstract: A document imaging system is disclosed which utilizes a tungsten halogen document illumination lamp in conjunction with a arsenic triselenide photoreceptor. The spectral sensitivity of the lamp and photoreceptor are matched by inserting a yellow filter into the optical path. The filter matches the spectral intensity at the blue end of the wavelength spectrum.

Abstract: A corona generating device for producing uniform charge along the length of the generating device is described which comprises a plurality of separate parallel coronode wires supported between insulating end block assemblies with the coronode wires being closely spaced relative to the adjacent wire such that when energized, each wire is placed within the electrostatic fringe field of the adjacent wire. In a preferred embodiment the device comprises a pair of parallel coronode wires formed from a single U-shaped wire with a closed end portion wrapped around an arcuate insulating end post in a first end block assembly, and an arcuate insulating end post in the second end block assembly around which the ends of the coronode wire may be wrapped, and insulating block adapters at both ends of the device having wire positioning slits therein, the end post being larger in diameter than the width of said slits in said end block adapters whereby the pair of wires is urged against opposite sides of the slit.