MAGNIFICATION VARIATION BY PRECESSION AND RECESSION
Original Publication Date: 1981-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
This disclosure is directed to the optical system of a photocopier which utilizes a scanning mirror to scan the information content of a stationary document lying in an object plane. The figure shows an optical system 10 which includes a scan mirror assembly 12 which includes a suitable linear light source (not shown). A second mirror 14 moves at a rate generally 1/2 that of the velocity of mirror 12 in order to maintain object conjugate. The reflected images from a document 16 are transmitted along optical path 18 and focused by lens 20 onto photoreceptor 22 via mirrors 24, 25. For this type of system, in a 1X magnification mode, the scan velocity (V) will equal the velocity of photoreceptor 22 and the exposed image length (L) on the photoreceptor will equal the document length (L),i.e. mag = L = 1.0.