| 摘要 |
PROBLEM TO BE SOLVED: To effectively and accurately calculate the paraxial amount and the aberration amount of an optical system developed around a reference axis as which the optical path of an optional light beam leading to an image surface from an object side through the optical system is set. SOLUTION: The light beam is traced by relating respective introduced azimuths before and after twisting to the optical system to which optical data including a twisting angleψis given, and paraxial and aberrational analysis of the optical system is performed by using the result of the tracing of the light beam.
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