Science in China Series F: Information Sciences

, Volume 48, Issue 1, pp 107–116 | Cite as

Lane of parallel through carry in ternary optical adder



At the present 50 to 100 microseconds are necessary for a liquid crystal to change its state from opacity to clarity; 1.14 × 10−5 microseconds are however proved to be enough for light to pass through a clarity liquid crystal device. Rooted from this great difference in time, an optical adder was constructed with parallel through carry lanes (PTCL) composed of liquid crystals. Because all carries in PTCL process in parallel, the carry delay in the ternary optical computer’s adder is avoided. Eliminating the carry delay in adder of ternary optical computer by physical means, the PTCL is also applicable for other types of optical adders. Moreover a light diagram of the adder and one PTCL structure are provided.


optical computer ternary adder through carry lane 


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Copyright information

© Science in China Press 2005 2005

Authors and Affiliations

  1. 1.School of Computer Engineering and ScienceShanghai UniversityShanghaiChina
  2. 2.College of Computer Science & EngineeringNorthwestern Polytechnical UniversityXi’anChina

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