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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 4 — Apr. 12, 2006

Stress-mapping sensors for high-power adaptive micro-optics

Mohd Suffian B. Zamali and Joseph J. Talghader  »View Author Affiliations


Applied Optics, Vol. 45, Issue 7, pp. 1619-1626 (2006)
http://dx.doi.org/10.1364/AO.45.001619


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Abstract

Continuous deformable membrane mirrors are becoming more attractive for use in adaptive optics because they cause no diffraction in the reflected beam and ensure smooth and continuous phase variations across the mirrors. However, when such mirrors are used to correct a high-power incident wave front, the absorption in the coatings causes the temperature of the membrane to increase, thereby creating in-plane thermal stress due to the rigidly clamped boundaries. We present a technique to measure thermal stress in such nondeforming membrane structures. The directional stress and temperature effects are simultaneously measured and decoupled in micromachined membrane mirrors by using a group of three ion-implanted silicon resistors with different orientations. In stress measurements made with incident power, the sensors measure changes in compressive thermal stress to within 80-90 kPa.

© 2006 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(130.6010) Integrated optics : Sensors

ToC Category:
Optical Interference Coatings

History
Original Manuscript: April 29, 2005
Manuscript Accepted: August 13, 2005

Virtual Issues
Vol. 1, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Mohd Suffian B. Zamali and Joseph J. Talghader, "Stress-mapping sensors for high-power adaptive micro-optics," Appl. Opt. 45, 1619-1626 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-45-7-1619


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