Wide field of view objective lens assembly

Details Wide field of view objective lens assembly Wide field of view objective lens assembly

1994-06-15

1996-04-16

Epps, Georgia Y.

Optical: systems and elements

Lens

Eyepiece

359648, 359418, 250214VT, G02B 2500

Patent

active

055088465

ABSTRACT:
An objective lens assembly provides up to 60 degrees field of view for the NVIS image intensifier goggle. A first lens subassembly positioned on the focal axis faces a external view and substantially corrects pupil aberrations in an aperture stop located after the first subassembly. A second lens subassembly is then located after the aperature stop on the focal axis. Color and field aberration corrections is provided while maintaining substantially high quality focus by a third lens subassembly. A lens element after the third lens subassembly on the focal axis flattens the image plane over the intensifier image format such that there results a format of up to 25 mm with a photocathode resolution for up to a 60 degree field of view.

REFERENCES:
patent: 3867018 (1975-02-01), Shoemaker
patent: 5204774 (1993-04-01), Owen, Jr. et al.

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