Trends in Space-Based Telescopes: From CubeSat Payloads to Deep Space Observatories
Trends in Space-Based Telescopes: From SmallSat Payloads to Deep Space Observatories
Emerging Needs: Freeform Optics, SiC Mirrors, Lightweight Designs
As space exploration advances, the demands on optical payloads are rapidly evolving. From compact CubeSats to flagship deep space observatories, today’s space-based telescopes require innovations that balance high performance with extreme environmental resilience. Key trends are reshaping optical design—most notably the adoption of freeform optics, silicon carbide (SiC) mirrors, and lightweight optical structures.
The Push for Compact, High-Performance Payloads
SmallSats and CubeSats have transformed the landscape of satellite-based imaging and sensing. These platforms require optical systems that deliver high-resolution performance in tight mass, volume, and power constraints.
Designers are now embracing:
- Freeform Optics: By moving beyond rotationally symmetric elements, freeform surfaces enable compact, off-axis designs that reduce the number of optical elements while correcting aberrations more effectively.
- Folded Optical Paths: Fold mirrors allow for longer effective focal lengths in small envelopes—ideal for maximizing resolution in SmallSat telescopes.
Material Innovation: Silicon Carbide (SiC) for Precision Mirrors
For both near-Earth and deep-space missions, mirror substrate material is critical. Silicon carbide (SiC) is increasingly favored due to its:
- High stiffness-to-weight ratio
- Low coefficient of thermal expansion (CTE)
- Excellent thermal conductivity
