Enhanced Reliability MEMS Deformable Mirrors for Space Imaging Applications, Phase II

Space based astronomical imaging systems are inherently challenged by the need to achieve diffraction-limited performance with relatively lightweight optical components. Given the current constraints on fabrication methods, it is necessary to develop new methods of manufacture to increase reliability and prevent single actuator failures. These higher-quality deformable mirrors will enable diffraction-limited performance for many space-based optical systems such as space-based observatories, interferometric telescopes and coronagraphic instruments for programs such as EPIC, TPF-C, TPF-I and PECO. By providing wavefront control and correcting for static and thermally induced aberrations of larger optics in a space-based optical platform, the use of a space-qualified MEMS DM will result in a significant performance improvement. Producing a more reliable and robust MEMS DM will also have a significant benefit for non-space-based optical instruments. BMC has had success developing arrays up to 4096 elements for the Gemini Planet Imager and with further research can achieve fewer actuator failures during the manufacturing process and better reliability during use. Reliable, small stroke, high precision deformable mirrors and associated drive electronics have a few commercial applications. The following applications apply to all Boston Micromachines mirrors that benefit from new manufacturing processes developed which increase reliability. Space surveillance: BMC has success developing arrays up to 4096 elements for astronomy which can be used for space-based systems. These programs are funded by Department of Defense administrations with classified agendas. Optical communication: Lasercomm systems would benefit from this new architecture for long-range secure communication. Microscopy: The capabilities of non-adaptive optics-enabled Optical Coherence Tomography(OCT) and Scanning Laser Ophthalmoscopy(SLO) devices have reached their limits. By increasing reliability, users will be able to utilize high-resolution equipment for use in detecting disease in uncontrolled environments. Other modalities affected include two-photon excitation fluorescence (TPEF) and coherent anti-stokes Raman spectroscopy (CARS). Pulse-Shaping: Laser science strives to create a better shaped pulse for applications such as laser marking and machining, and material ablation and characterization. The use of a highly reliable, high-actuator count array for these purposes will enable new science and confidence that equipment is usable in non-ideal environments. More »