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Proceedings Paper

Investigation of optical information for a single micro grating device combined with MATA by SMart process
Author(s): Chien-Chung Tsai; Yi-Chao Huang; Tsa-Hsien Yang; Jen-Chieh Chen
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Paper Abstract

The concentric circles type and saw-tooth type of micro grating device based upon the diffraction theory are proposed in this study. The geometry dimension of micro optical device is 200 × 200 μm2, the interval of grating is 4 μm, and the depth is 0.75 μm. The Micro Array Thermal Actuator, MATA, is applied to drive the micro grating device, and the pre-elevating structure is designed to lift the micro grating device by the residual stress of polysilicon combined with metal. The micro grating device is fabricated by Surface Micromachining for applications and research technology platform, SMart, common process. The incident ray of He-Ne laser focused by a lens which focal length is 250 mm is applied to be the light source for the experiment, and then analyzes the optical information of the outgoing ray. From the experimental results, the basic optical features are examined based upon the concentric circles type and saw-tooth type of micro grating device, respectively. The outgoing ray angle of central spot is 60° in theory. The measurements are 59.475° for the concentric circles type and 59.88° for the saw-tooth type. The outgoing ray angle of the first stripe is 46.9° in theory, and 46.81° for the concentric circles type and 46.67° for the saw-tooth type are measured from the experiment. The variation of outgoing ray angle is smaller than 1% compared the measurement results with theory of diffraction on the central spot and first stripe characteristics. The work successfully demonstrates the micro grating device with highly accurate performance by the verification of optical information. All of the efforts will be contributed to Controlled Blazed Diffraction micro grating device, CBDMG, and that will be the main device of Integrate Opto-Electronics applied on display to develop in the future.

Paper Details

Date Published: 23 January 2006
PDF: 9 pages
Proc. SPIE 6114, MOEMS Display, Imaging, and Miniaturized Microsystems IV, 61140O (23 January 2006); doi: 10.1117/12.645040
Show Author Affiliations
Chien-Chung Tsai, Ming Hsin Univ. of Science and Technology (Taiwan)
Yi-Chao Huang, Ming Hsin Univ. of Science and Technology (Taiwan)
Tsa-Hsien Yang, Ming Hsin Univ. of Science and Technology (Taiwan)
Jen-Chieh Chen, Ming Hsin Univ. of Science and Technology (Taiwan)


Published in SPIE Proceedings Vol. 6114:
MOEMS Display, Imaging, and Miniaturized Microsystems IV
Hakan Ürey; David L. Dickensheets; Bishnu P. Gogoi, Editor(s)

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