FIELD: optics.
SUBSTANCE: the zoom lens drive has a step-by-step motor coupled through a reduction gear to a cylinder cam with shaped grooves on the generating line, two carriages kinematically linked with the cam, return spring with one end fastened on the cam, and with the other - on the drive body, and a control unit whose outlet is connected to the four windings of the step-by-step motor. Each carriage is provided with a backlash take-up spring fastened with its ends on the carriage and drive body respectively. On the axle of rotation of the cylinder cam, having a lug on the end face surface, installed is a cam rotation limiter made in the form of cams. The first cam has a lug engageable with the lug of the cylinder cam, and the latter is installed with a stop against metal-rubber shock absorber located on the drive body.
EFFECT: reduced mass and dimensional characteristics of the zoom lenz drive.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ZOOM LENS DRIVE | 2003 |
|
RU2260827C2 |
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|
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