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Search - Micromachined Mirrors (Microsystems)

Micromachined Mirrors - Microsystems
Author: Robert Conant

Micromachined scanning mirrors are interesting for a wide variety of applications because of their potential low cost, high speed, low power consumption, and reliability. These mirrors can offer significant advantages over macro-scale mirrors, but the fundamental limitations of scanning mirrors have not been widely discussed. — Miniaturization in... more » electronic systems has led to radical improvements in computers and communications, and micromachining technologies promise to generate such improvements in miniaturized mechanical and optical systems, including specifically higher-speed, smaller, lower-cost scanning mirrors. Micromachined Mirrors provides an overview of the performance enhancements that will be realized by miniaturizing scanning mirrors like those used for laser printers and barcode scanners, and the newly enabled applications, including raster-scanning projection video displays and compact, high-speed fiber-optic components.

There are a wide variety of methods used to fabricate micromachined mirrors - each with its advantages and disadvantages. There are, however, performance criteria common to mirrors made from any of these fabrication processes. For example, optical resolution is related to the mirror aperture, the mirror flatness, and the scan angle. Micromachined Mirrors provides a framework for the design of micromirrors, and derives equations showing the fundamental limits for micromirror performance. These limits provide the micromirror designer tools with which to determine the acceptable mirror geometries, and to quickly and easily determine the range of possible mirror optical resolution and scan speed.

Micromachined Mirrors presents descriptions of mirrors made from two fabrication processes - the surface-micromachining process and the staggered torsional electrostatic combdrive (STEC) high-aspect ratio micromachining process. The mirrors made using these two processes are evaluated for scan speed, optical resolution, ease of manufacture, and reliability.

Micromachined Mirrors also presents an example application of surface-micromachined mirrors: a raster-scanning projection video display. This demonstration shows the advantages of micromachined mirrors (small high-speed scanners) with special attention paid to the major drawback of surface-micromachined mirrors (lower resolution due to dynamic deformation). The successful demonstration of this simple prototype video display helps clarify the importance of the critical performance characteristics to consider when designing micromachined mirrors.

ISBN-13: 9781402073120
ISBN-10: 1402073127
Publication Date: 12/31/2002
Pages: 160
Edition: 1
Rating:

0 stars, based on 0 rating

Publisher: Springer
Book Type: Hardcover
Members Wishing: 0
Reviews: Amazon | Write a Review

Genres:

Science & Math >> General
Science & Math >> Physics >> Optics
Engineering & Transportation >> Professional Science >> Physics >> Optics
General
Mechanical >> General
Mechanical >> Machinery
Computer Technology >> Imaging Systems
Computer Technology >> Scanning Systems
Electrical & Optical >> General
Electrical & Optical >> Optics >> General
Machinery

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