Off-Axis Blog

Controlling Quality in Off-Axis Parabolas (k, f, theta, OAD)

INTRODUCTION Controlling quality of off-axis parabolic mirrors requires tolerances that are both traceable to performance and verifiable by measurement. Primary aspheric parameters for off-axis parabolic (OAP) mirrors, include the conic constant (k), focal length (f), off-axis angle (OAA or“θ”) and off-axis distance (OAD). We defined these in our application note, “Specifying the Geometry of an Off-Axis Parabolic Mirror”. Getting the OAP configuration right may be…

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Posted: February 16, 2021

Specifying the Geometry of an Off-Axis Parabolic Mirror

This paper provides instruction on how to define the key geometric features of Off-Axis Parabolic Mirrors (OAPs) and describes the concept of axial offsets as a function of off-axis angle.

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Posted: January 20, 2021

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

 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
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