Pixel size and pitch measurements of liquid crystal spatial light modulator by optical diffraction

Pramana

Ravinder Kumar Banyal¹  B Raghavendra Prasad1¹ 

[1] Indian Institute of Astrophysics, Koramangala 2nd Block, Bangalore 560 034, India$$

关键词: Liquid crystal displays;    spatial light modulator;    optical diffraction.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We present a simple technique for the determination of pixel size and pitch of liquid crystal (LC) based spatial light modulator (SLM). The proposed method is based on optical diffraction from pixelated LC panel that has been modeled as a two-dimensional array of rectangular apertures. A novel yet simple, two-plane measurement technique is implemented to circumvent the difficulty in absolute distance measurement. Experimental results are presented for electrically addressed twisted nematic LC-SLM removed from the display projector.

【 授权许可】

Unknown