Optical objective module
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United States of America Patent
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Issued Date -
Apr 8, 2010
app pub date -
Feb 17, 2006
filing date -
Mar 21, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to an objective module comprising an optical zoom lens group (2) and a focusing optical lens group (4), the combined optical axes forming the optical axis (7) of the objective, and an electrical drive for the two lens groups. According to the invention, the electrical drive of the cited lens groups is embodied in the form of two linear ultrasonic motors (9, 11), each of the two ultrasonic motors consisting of a piezoelectric plate (12) comprising two friction elements (14) which are pressed against the opposing front sides and form the mobile elements of the ultrasonic motors together with the pressure elements (15). Each of the mobile elements is elastically connected to the corresponding lens group. The ultrasonic motors are arranged in such a way that the direction of displacement of the mobile elements is parallel to the optical axis of the optical module.
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