Projection objective of fixed focal length for digital...

Details Projection objective of fixed focal length for digital... Projection objective of fixed focal length for digital...

G - Physics

03

B

G03B 21/14 (2006.01) G02B 9/64 (2006.01) G02B 13/08 (2006.01) G03B 21/32 (2006.01)

Patent

CA 2590884

The invention proposes a projection objective of fixed focal length for digital projection with the following arrangement of the lenses in the sequence from the image (enlargement side) to the object (reduction and illumination side): - a first, negative lens (1), - a second, negative lens (2), - a third lens (3), - a fourth, positive lens (4), - a fifth lens (5), - a sixth, positive lens (6), - a seventh, negative lens (7), - an eighth, positive lens (8), - a ninth, positive lens (9). By means of such an objective, the quality requirements in the field of digital projection can be met with a minimal number of lenses.

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