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AN OPTICAL SYSTEM Disclosure Number: IPCOM000023270D
Original Publication Date: 1977-Apr-30
Included in the Prior Art Database: 2004-Mar-29

Publishing Venue

Xerox Disclosure Journal


An exposure station used in an electrophotographic printing machine and including lamps 25 moving across platen 26 to illuminate original document 24 disposed face down thereon. Lens 18 and filter 22 move in synchronism with lamps 25. The light rays reflected from original document 24 are transmitted through platen 26 onto mirror 70. Mirror 70 reflects the light rays through lens 18 and filter 22 onto mirror 72. Mir-ror 72 reflects the light image through screen 28 onto the charged portion of photoconductive surface 12. Lens 18 has an opaque member 20 interposed therebetween. Opaque member 20 is a flat sheet having a plurality of spaced holes or slots therein. As shown in Figure 1, opaque member 20 is interposed between the front component l8a and back component 18b of lens l8- The size of the holes or slots in opaque member 20 may be equal to one another or variable to adjust the intensity pat-tern.