Acta Optica Sinica, Volume. 9, Issue 9, 843(1989)
Symbolic substitution using shadow-casting
A new optical system for symbolic substitution is proposed. The system is composed of the lensless shadow-casting system comibined with optical logical array and optical image storage elements. The light-emitting diodes (IED) are used as both a light source and a control element in the operation, so that symbolic substitution is implemented by all-photoelectric manipulation. Experimental principle, procedure and result are given.
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XUE WEI, CHENNG LIXUE, LI CHONFEI, HONG JING. Symbolic substitution using shadow-casting[J]. Acta Optica Sinica, 1989, 9(9): 843