Variable focus camera for borescope or endoscope

Details Variable focus camera for borescope or endoscope Variable focus camera for borescope or endoscope

1991-07-24

1993-03-09

Millin, Vincent

Surgery

Truss

Perineal

359823, 359826, 92 92, A61B 104

Patent

active

051918790

ABSTRACT:
A variable focus camera system for a borescope or endoscope has a camera or imager disposed within an imager sleeve and a braid and bladder assembly attached between the distal end of the imager sleeve and a lens assembly. A controlled pressure is applied through a pressure conduit into a confined volume defined by the imager sleeve, the braid and bladder assembly, and the lens assembly. The braid and bladder assembly expands axially but not radially, when pressure is applied, and changes the relative position of the imager and lens between a far focus and a near focus position.

REFERENCES:
patent: 4620769 (1986-11-01), Tsuno
patent: 4777524 (1988-10-01), Nakajima et al.
patent: 4794912 (1989-01-01), Lia

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