A study of blue-ray pickup head optical system with liquid crystal optics module

Chih-Ta Yen; Yi-Chin Fang; Chen-Mu Tsai

doi:10.1117/12.896807

4 October 2011 A study of blue-ray pickup head optical system with liquid crystal optics module

Chih-Ta Yen, Yi-Chin Fang, Chen-Mu Tsai

Proceedings Volume 8172, Optical Complex Systems: OCS11; 817211 (2011) https://doi.org/10.1117/12.896807
Event: SPIE Optical Systems Design, 2011, Marseille, France

Abstract

A new optical design inclusive of Blue-Ray Pickup head system and liquid crystal optics is proposed in this paper. With electrode pattern and the differential biased circuit, the gradient of the electric field distribution inside the liquid crystal sample cell are able to vary through the adjustment of driving voltage. Optical power of liquid crystal lens can be determined by changing the polarity of gradient within the sample cell which posses the homogeneous alignment, then deliver convergence or divergence of specific light beams. This design is capable of correcting aberrations fast with liquid crystal optics scheme when any misalignment errors occur. According to specification from Blue-ray Disc White paper, there are several kinds of pick up head system with LC liquid optics are designed and discussed in this paper. Different tolerance such as de-focus, tilt, de-center and their related compensation are further analyzed in this research. The simulation results show that optical design using liquid crystal optics with aperture stop setup as a compensation device can eliminate up to 46% compared to traditional ones.

Citation Download Citation

Chih-Ta Yen, Yi-Chin Fang, and Chen-Mu Tsai "A study of blue-ray pickup head optical system with liquid crystal optics module", Proc. SPIE 8172, Optical Complex Systems: OCS11, 817211 (4 October 2011); https://doi.org/10.1117/12.896807

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KEYWORDS

Liquid crystals

Monochromatic aberrations

Objectives

Optical design

Head

Crystal optics

Lens design

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