Segmented Active / Adaptive Thin Shell Mirror
conference paper
Current ELTs use comparatively thick segmented mirrors with a support structure / warping structure of significant mass. In this publication we present a method to develop Segmented Thin Shell Mirrors that are intended to be supported by multiple actuators mounted on a backing structure. This enables active and or adaptive segmented mirrors for a variety of applications. Starting with a circular Adaptive Secondary Mirror face sheet, the pre and post waterjet cutting surface form error was measured and compared. The difference between the two is 17.7 µm peak-to-valley and 3.7 µm rms. The error is gradual and can easily be compensated by pre-loading the actuators that support and actively deform the mirror.
TNO Identifier
1001167
Source title
SPIE conferentie SPIE Astronomical Telescopes & Instrumentation, Yokohama, Japan
Pages
1-7
Files
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