06019721 is referenced by 24 patents and cites 20 patents.

A focus mechanism having an actuator positioned near the rear of a handheld piece and that allows a lens element to be moved with respect to a stationary image sensor to achieve a range of focus. When implemented as a manual focusing feature of an intraoral dental camera or handpiece, the focus mechanism allows greater control of focus as the user's hand that grasps the actuator (e.g., ring) is not in close proximity to the distal end of the camera which is inserted into the patient's mouth. Maintaining the image sensor stationary also helps increase system reliability. In a particular embodiment, a variable profile cam allows high precision focus with the camera inside the patient's mouth, while still allowing enough focus travel for capturing a head shot or an image of the patient's smile or face when the camera is moved outside the patient's mouth.

Title
Camera with improved focus mechanism
Application Number
9/94234
Publication Number
6019721
Application Date
June 9, 1998
Publication Date
February 1, 2000
Inventor
Douglas A Golay
Coon Rapids
IA, US
David P Holmes
Santa Barbara
CA, US
Agent
Blakely Sokoloff Taylor & Zafman
Assignee
Integra Medical
CA, US
IPC
A61B 1/002
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