06 Feb 2006 New Scale demonstrates 4 mm range, 10 micrometer repeatability in a tiny 10 x 12 mm module; combined optical zoom / auto focus modules are forthcoming. 4 mm range, 10 micrometer repeatability in a tiny 10 x 12 mm module; combined optical zoom / auto focus modules are forthcoming.
A new optical zoom module for mobile phones uses the patented SQUIGGLE motor to achieve greater than 4 mm lens travel with better than 10 micrometer closed-loop repeatability. This demonstration module validates the piezoelectric motors unique ability to deliver both optical zoom and auto focus movement in a tiny package for next-generation handsets.
As phone cameras designers move to 3MP (mega pixel) and 5MP CMOS image sensors, both auto focus and optical zoom will be required to deliver the image quality they want from those sensors. The linear SQUIGGLE motor is uniquely suited to provide both the range and repeatability required for this, in a tiny package.
The module incorporates a piezoelectric SQUIGGLE motor, a smooth linear guide, preload springs, limit stops, and a position sensor. Its 10 mm x 12 mm cross section is only slightly larger than the 8 mm diameter lens. Its 18 mm length reflects the typical optical and physical properties of the lens elements and image sensor. Actual dimensions will be determined by the customer's choice of optics and image sensor.
Single-chip controllers are under development by leading ASIC manufacturers and will be available by the second quarter of 2006.
Compared to stepper motors and voice coils, SQUIGGLE motor-based modules scale to the smallest possible size, independent of the optics and image sensor. The simple and low-cost design eliminates gears, cams and barrels, and provides better robustness to mechanical shock and temperature extremes. SQUIGGLE motors have higher efficiency and longer battery life, holding the lens in position with zero power and high rigidity.
About the SQUIGGLE Motor
The patented SQUIGGLE motor design uses a threaded nut and screw to create precise linear movement in a very small space. Piezoelectric ceramics create ultrasonic vibrations in the nut, causing the screw to rotate and translate with high precision. SQUIGGLE motors are smaller, more precise, less expensive, and more efficient than conventional electromagnetic motors. In addition, they use 90 percent fewer parts and require no gear reduction, which eliminates many failure modes. This ceramic motor is fundamentally compatible with high magnetic fields including MRI chambers. SQUIGGLE motors are used in nanotechnology research, microelectronics, optics, lasers, biotechnology, medical devices, aerospace and defense, fluid control, and office/consumer products including mobile phone cameras.
About New Scale Technologies, Inc.
New Scale Technologies, Inc
www.newscaletech.com makes miniature ceramic motors that enable our customers to create smaller products and research tools. Our piezoelectric SQUIGGLE motors are smaller, more efficient and more precise than conventional motors. With only seven parts and no gears, this patented piezoelectric motor design uses ultrasonic vibrations to create precise linear motion. New Scales miniature motors are compatible with extreme environments including vacuum, very low (sub-Kelvin) temperatures, and high magnetic fields.
SQUIGGLE is a registered trademark of New Scale Technologies, Inc.
For more information contact:
Fred Haas, Sales Manager, New Scale Technologies
Phone 585-924-4450 x 112
fhaas@newscaletech.com |
