K. Fujisawa, K. Nishimura, Y. Ono and S. Komatsu: Phase distribution measurement based on wave-front compensation: Extended phase modulation depth with blue-violet laser diode, Extended Abstracts (Optics and Photonics Japan 2009) (2009) 550-551. (26aE4)

It is useful to visualize phase distribution of transmitted light because there is much information about transparent object. We can measure phase distribution by wavefront compensation. Twisted nematic liquid crystal is used for spatial light modulator and double-pass method is adopted to keep intensity of light and extend phase modulation. In this paper, to extend more phase modulation depth, we use blue-violet laser diode.