Abstract
Miniaturization is an essential trend in the design of portable devices. Motor-driven lens technology is a traditional way to achieve autofocus and optical zoom functions. This approach usually requires considerable space and consumes significant power. Reflective optics is a methodology that not only can fold the optical path, but it has the advantage of low chromatic aberration. In this paper, we use a deformable mirror as a reflecting element in an optical zoom system. For its low Young’s modulus and residual stress, we choose polydimethylsiloxane as a deformable membrane that can provide a large stroke. The optical zoom module consists of a pair of micromachined deformable mirrors. The thickness of this module is 10 mm, which enables optical zoom. The smallest effective focal length is 4.7 mm at a full field angle of 52°, and the -number is 4.4. The largest effective focal length of the module is 9.4 mm, and the -number is 6.4.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Yu-Hung Lin, Yen-Liang Liu, and Guo-Dung J. Su
Appl. Opt. 51(11) 1804-1810 (2012)
Hsin-Ta Hsieh, Hsiang-Chun Wei, Meng-Hsuan Lin, Wei-Yao Hsu, Yuan-Chieh Cheng, and Guo-Dung John Su
Opt. Express 18(11) 11097-11104 (2010)
Hui Zhao, Xuewu Fan, Gangyi Zou, Zhihai Pang, Wei Wang, Guorui Ren, Yunfei Du, and Yu Su
Appl. Opt. 52(6) 1192-1210 (2013)