Underwater multi-mode night vision apparatus

Details Underwater multi-mode night vision apparatus Underwater multi-mode night vision apparatus

1995-01-03

1997-05-06

Gregory, Bernarr E.

Radiant energy

Infrared-to-visible imaging

359895, H01L 3100

Patent

active

H00016454

ABSTRACT:
An underwater night vision apparatus employing a night vision device for enhancing images illuminated solely by ambient light and an LED illuminator for provision of invisible infrared light to supplement ambient light. A catadioptric lens is used to increase optical efficiency and becomes the cover of a recessed compartment in the apparatus and in the optical path between the lens and the night vision device. The compartment fills with non-turbid seawater when the lens is changed underwater. The entrapped seawater constitutes a lens which contributes to the overall image enhancement.

REFERENCES:
patent: 3787688 (1974-01-01), Stone
patent: 5055892 (1991-10-01), Gardner et al.
patent: 5331459 (1994-07-01), Dor

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