Projection lens arrangement and method of using same

Details Projection lens arrangement and method of using same Projection lens arrangement and method of using same

1996-06-07

1997-12-16

Pham, Hoa Q.

Optical: systems and elements

Lens

With field curvature shaping

359708, 359713, G02B 1318

Patent

active

056991959

ABSTRACT:
The projection lens arrangement includes a projection lens assembly having a plurality of lens elements aligned in a common optical path, and arranged in a generally Tessar configuration. One of the lens elements is movable along the optical path in a linear fashion. Another one of the lens elements is movable along the optical path in a non-linear manner, wherein the two lens elements move along the optical path substantially concurrently. The movement of the non-linearly moving element is slaved to the movement of the linearly moving element. A field lens element directs the flux from an image display unit to the entrance pupil of the projection lens assembly.

REFERENCES:
patent: Re35310 (1996-08-01), Moskovich
patent: 4285579 (1981-08-01), Yamada
patent: 4394073 (1983-07-01), Wakamiya
patent: 4674844 (1987-06-01), Nishioka et al.
patent: 4900139 (1990-02-01), Kreitzer
patent: 4963007 (1990-10-01), Moskovich

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