Determination of Optimum Birefringences of Optical Materials through Design, Manufacturing and In-Service Processes by Controlling a Consistent Mechanical Parameter Based on the Inverse Analysis (Proposal of a New Concept and its Fundamental Formularization)
A material shift in optical components from glasses to polymers has been facing a peculiar problem of larger birefringence characteristic. Birefringence causes an inherent error in optical systems. Here, an optimization ofvarious types of controllable factors is proposed toward elimination of such birefringence distributions. As a single parameter for evaluating birefringence through the design, manufacturing and in-service processes, we adopted stresses which can be converted from the stress-optical law or the Wertheim law. After formularization of the proposed method, its applicability was examined through a simple numerical simulationbased on the measured birefringence distribution of an injection-molded PMMA lens. It is shown that the problem can be solvedtoa certain levelby introducing the genetic algorithmalthough further controlling factors should be still considered.
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