Faster LASL Lens Design Program.
The following improvements have made the LASL lens design system much faster, though less versatile, and have maintained the calculation accuracy: an increment-vector damping technique optimized by a search procedure, analytic differentiation, simultaneous design on all variables, reliable convergence criteria, vignette control by biased violation errors, bounds for the variables, and an enlarged weighting procedure. The designing system optimizes the sizes and positions of many-ray image spots without consideringthe classical aberrations. As a sample problem the symposium lens has been redesigned.
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