Abstract

We found that the bacteriorhodopsin (bR) film has a special property ofcomplementary suppression modulated transmission (CSMT). The yellow andthe blue beams can be suppressed mutually when both the beamsilluminate the bR film simultaneously. When the blue beam carrying animage with a bright-background noise illuminates on the bR film andthen a yellow beam with uniform intensity distribution illuminates thesame area, the bright-background can be removed due to the CSMT. In ourdemonstration, the pattern model is letters ``VLSI'' with ground noise ofsmall words and the ground noise is removed from the pattern by thenew optical filter.

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