Off-Axis Blog

Athermal Superiority: SiC vs. Aluminum-Glass Telescopes for SmallSat Applications

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 INTRODUCTION Optical Telescope Assemblies (OTAs) implemented in silicon carbide (SiC) provide performance advantages for space applications but have been predominately implemented in the government sector. A new generation of lightweight and thermally-stable designs is commercially available, expanding the application of SiC to small satellites. One of the major challenges in satellite telescope design is the ability to maintain performance in the thermal environment of low-earth…

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Posted: October 15, 2017

Aspheric Optics Manufacturing

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Making aspheres with Robotic Polishing Aperture Optical Sciences Inc. applies two unique technologies, Zeeko robotic grinding and polishing and QED’s magnetorheological (MRF) polishing. Both technologies address the growing demand for high performance aspheric lenses and mirrors for industry and science. We offer MRF polishing through our partner Okamoto Optics and provide Zeeko Robotic polishing on optics up to 800 mm in diameter in our advanced fabrication facility in Central Connecticut. Making optical mirrors…

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Posted: March 26, 2017

Zero-Expansion Ceramic Mirrors

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INTRODUCTION Cordierite (2MgO-2Al2O3-5SiO2) is the name for a variety of low expansion ceramics that can be used for optical applications with some highly compelling advantages. Cordierite material can be made with a nearly zero expansion coefficient and has higher modulus and thermal conductivity when compared with traditional glass-ceramics. As a sintered material, lightweight structures can be efficiently machined in the “green” pre-sintered state and options…

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Posted: March 26, 2017
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