07553020 is referenced by 8 patents and cites 16 patents.

A diagnostic instrument includes an illumination system for providing illuminating light and an imaging system for directing the illuminating light to a target and for transmitting light reflected from the target to a viewing location. The imaging system includes an electrically controllable variable focus liquid lens assembly for focusing the light reflected from the target at the viewing location. The liquid lens assembly includes at least one liquid lens including a housing filled with a first liquid, and a drop of a second liquid being in contact with the first liquid in a predetermined form. The lens further includes a first electrode insulated from the second liquid and a second electrode in electrical contact with the first liquid. A variable voltage control selectively applies a voltage to the first and second electrodes to vary the focus of the lens. An electronic imager is provided to capture the reflected target image.

Title
Medical diagnostic instrument with variable focus liquid lens
Application Number
11/541511
Publication Number
7553020 (B2)
Application Date
September 29, 2006
Publication Date
June 30, 2009
Inventor
Daniel C Briggs
Menphis
NY, US
Ervin Goldfain
Syracuse
NY, US
Agent
Stephen Rosenholm
Hiscock & Barclay
Assignee
Welch Allyn
NY, US
IPC
A61B 3/10
A61B 3/14
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