Fabrication and metrology of off-axis freeform mirrors for the K-DRIFT G1 telescope

Résumé fourni par la source

We fabricated and tested three freeform mirrors for the KASI Deep Rolling Imaging Fast Telescope, a confocal off-axis three-mirror system with a 300 mm entrance pupil diameter. To reduce weight, lightweighting design was applied to the primary and tertiary mirrors, resulting in weight reductions of 73.2 % and 73.9 %, respectively. The secondary mirror (SM) was not subject to the lightweighting process. Surface profiles were measured using Coordinate Measuring Machines (CMMs) during grinding. For polishing and finishing, CGH was used for the primary and tertiary mirrors (PM, TM), while LuphoScan was used for the secondary mirror (SM). All mirrors met the required surface accuracy of 20 nm RMS and 100 nm PV.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.