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Reconfigured Schmidt Triplet for ZTF-R: Enhanced Design for Optimal Imaging Quality

Refigured Schmidt singlet and Grubb-Parsons doublet for ZTF-R ensure superior image quality with improved design features. This reoptimization process enhances imaging performance, providing a stable and accurate solution for astronomers. The new design minimizes aspheric coefficients and allows flexibility in installation position, while maintaining optimal image quality across the field.

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Reconfigured Schmidt Triplet for ZTF-R: Enhanced Design for Optimal Imaging Quality

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  1. Schmidt Triplet for ZTF R. Dekany 16 April 2013

  2. Add refigured Schmidt singlet to existing Grubb-Parsons doublet

  3. Features of latest design April 15 • Singlet remains plane parallel • Earlier quotes called for grinding a radius to one of the two existing plane surfaces • New aspheric coefficient is about 70x smaller than the existing coefficient • … if original design is simply optimized Schmidt • Therefore, the ‘refiguring’ process for the singlet is fundamentally taking out much of the asphere • Insensitive to axial location for installation • Could be either inside or outside existing doublet • Relatively insensitive to axial location • 10 mm lateral misplacement barely affects image quality

  4. Image quality(g’ shown) • Evaluated assuming • g’ filter on inner 4 CCDs • R filter on outer 8 CCDs • … but it makes little difference after reopimizing • Field curvature under control • Same design IQ out (beyond) corner of 16 CCD FPA

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