The US Air Force Academy of Physics has built FalconSAT-7, a membrane solar telescope to be deployed from a
3U CubeSat in LEO. The primary optic is a 0.2m photon sieve – a diffractive element consisting of billions of tiny
circular dimples etched into a Kapton sheet. The membrane its support structure, secondary optics, two imaging
cameras and associated control, recording electronics are packaged within half the CubeSat volume. Once in space
the supporting pantograph structure is deployed, extending out and pulling the membrane flat under tension. The
telescope will then be directed at the Sun to gather images at H-alpha for transmission to the ground. We will
present details of the optical configuration, operation and performance of the flight telescope which has been made
ready for launch in early 2017.
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