Focal adjustment on a single-focus lens in a continuously...

Details Focal adjustment on a single-focus lens in a continuously... Focal adjustment on a single-focus lens in a continuously...

G - Physics

03

B

95/33.2

G03B 27/36 (2006.01) G03G 15/041 (2006.01)

Patent

CA 1089690

FOCAL ADJUSTMENT ON A SINGLE-FOCUS LENS IN A CONTINUOUSLY VARIABLE MAGNIFICATION SYSTEM Abstract of the Disclosure Method and apparatus for adjusting the position of a single-focus lens at two positions in a continuously variable reduction document copier machine. Adjustment is made at a 1:1 ratio by shifting the position of the lens on its carriage until focus is obtained. Adjustment is made at a nominal 0.647 reduction ratio by adjusting the position of the lens carriage until focus is obtained. Apparatus is disclosed which provides the second adjustment without affecting the position of the lens at the first adjustment position.

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