TPF-C Technology Plan - Exoplanet Exploration Program - NASA

Chapter 6
super computers and is used to develop the shapes for the optics. Software development will be
in parallel with the experimental effort. High priority will be given to matching experimental
results with the numerical model of the concept.
SAO, working with Princeton, is studying a unique architecture for this concept. The study will
include devising a method to minimize the off-axis aberrations and optimize the stellar image
concentration. This study will work through mathematical simulations without producing
hardware.
Progress to Date
UH and NOAO have built the first phase testbed successfully using low-quality plastic optics.
Results from this testbed qualitatively verified the concept and were comparable to the simulated
predictions. Figure 6-7 shows a picture of the detector output from this testbed as well as a
photo of the optics. The second phase testbed is now underway. The first phase testbed is
disassembled while updated component fixtures are being designed and fabricated. Optics have
been ordered and are due Summer 2005. A MEMS deformable mirror has been ordered and the
electronics and control software are underway. Simulations are continuing.
Figure 6-7. Detector output and optical components.
SAO, partnering with Princeton, started on contract in May 2004. To date, they have developed
a refractive design with simulated performance that meets requirements within a narrow
waveband. Figure 6-8 shows the design. Modeling is continuing with efforts focusing on
optimizing the shape of the optics versus performance and fabrication.
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