High pressure and high speed optical enclosure system

Details High pressure and high speed optical enclosure system High pressure and high speed optical enclosure system

1980-04-23

1981-10-20

Griffin, Donald A.

G03B 1708

Patent

active

042957214

ABSTRACT:
A fluid tight camera housing system for deep underwater use wherein the camera focal length is unaffected by external hydraulic pressure. The housing system comprises an external housing cylinder capped at the rear by a lipped plate or dome. The lipped portion is grooved for an O-ring seal which slips into the housing, sealing against its internal wall. The front end of the external housing cylinder is capped with a pressure resistant negative correcting lens system in a ring mount lipped and grooved for an O-ring seal. The outer optical element has an O-ring or other seal between it and the lens mount. Internally, a camera chassis and a primary focusing lens are connected to an internal cylinder, which is connected to the pressure resistant correcting lens system. The internal cylinder centers the camera on the optical axis and holds it independently of the external housing cylinder and rear plate. By mounting the camera to the internal cylinder and the internal cylinder to the pressure resistant lens mount, the distance and axial alignment (bore sighting) between the primary focusing lens and film focal plane, the distance and axial alignment (bore sighting) between the correcting lens and primary lens, and the distance and axial alignment (bore sighting) between individual correcting lens members is not affected by stress on the external structure due to hydraulic pressure.

REFERENCES:
patent: 685463 (1901-10-01), Walkins
patent: 2001683 (1935-05-01), Jackman
patent: 2256133 (1941-09-01), Barnes
patent: 3001462 (1961-09-01), De Wouters D'Oplinter
patent: 3019715 (1962-02-01), Arnold et al.
patent: 3788730 (1974-01-01), Greenleaf

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