Focusable, color corrected, high performance projection lens sys

Details Focusable, color corrected, high performance projection lens sys Focusable, color corrected, high performance projection lens sys

1998-08-20

2000-10-31

Sugarman, Scott J.

Optical: systems and elements

Lens

With field curvature shaping

359649, G02B 300

Patent

active

06141154&

ABSTRACT:
Focusable, color corrected, high performance projection lens systems are provided which include three lens units (U1, U2, U3), the first lens unit being composed of two subunits (U.sub.S1, U.sub.S2). The lens systems can have f/190 's less than 1.0, total fields of as much as 90.degree., low vignetting losses, and MTF values greater than 0.5 at 10 cycles/mm through 0.85 of the full field. By varying the space between the first and second lens units, these performance levels can be maintained as the lens system is focused over a range of conjugates of approximately .+-.7.5% from a center value of about 4 meters. The lens systems can be used in such demanding applications as flight simulators.

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