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Ray tracing of Vegetation mirrors
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- Title Ray tracing of Vegetation mirrors
- Released 13/03/2013 2:57 pm
- Copyright ESA/QinetiQ Space
Ray tracing showing how light is reflected through Proba-V's Vegetation instrument. Its mirrors are arranged within a compact ‘three-mirror anastigmat’ (TMA) design, but need to be curved in just the right ‘aspherical’ shape. Achieving this required a manufacturing technique of nanometre-scale precision known as ‘single-point diamond turning’ by Belgium-based specialist AMOS. Whether it could be achieved at all was initially uncertain. In 2009 a prototype TMA telescope was produced through ESA’s General Support Technology Programme (GSTP), which helps to develop space hardware to flight readiness.