Thermal, structural, and optical modeling tools are used to predict the optical performance of a Double Gauss lens assembly subject to laser loading as shown in Fig. 9.1. System specifications are listed in Table 9.1. A fraction of the laser load is absorbed by the optical elements via bulk volumetric absorption, resulting in thermal gradients in the lens assembly. The on-axis wavefront error, point spread function, modulation transfer function, and the change in focus is computed for laser powers of 40, 80, 120, 160, and 200 W. Nominally, each optical surface is spherical with surface curvatures listed in Table 9.2 and surface numbering shown in Fig. 9.2.
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