H
Business

Optical Solutions Beyond Earth

Extreme heat and impact resistance optical technology required in space environments.
Green Optics develops lightweight, high-strength optical components optimized for launch vehicles, satellites, and space exploration systems.

Space Industry Products

01
For research on small satellites and the execution of various missions such as communication, Earth environment monitoring, military purposes, and space environment observation, the commercialization of ground telescope development and lightweight/miniaturization technologies for space optical systems is expected to continue expanding.
Ø 500 mm Telescope
The World’s first Newtonian Telescope that selectively observe the EO and IR(Infrared) Region, capable of detecting objects existing in space below 15th magnitude with a wide angle of 2.0˚ x 2.0˚
Ground-based Telescope
Ground-based telescopes made lighter through light weight reduction work. Light weight reduction technology is becoming widespread because faster rotation speeds facilitate image acquisition.
Mechanical Structure
Satellite Camera
As the satellite market scale rapidly increases, the light weight technology of optical system becomes essential, and lightweight mirrors are utilized as satellite optical payloads, performing various missions for ground or space observation.
02
Ø 1600mm Telescope Primary/Secondary Mirror Manufacturing
Unpacking
M1, Non Coating
Install Jig
Rotation
Loading To Sputter
Sputtering
Finished Mirror
Unloading
Packing
Primary Mirror, Zerodur
  • Aperture Ø 1600 mm(Concave Parabolic)
  • Surface Errors RMS < 7.5 nm
  • Coating Protected Silver, %R > 98%
  • Waveband Visible & MWIR
03
Space Observation Telescope Development Using Off-axis Freeform Three-Mirror System
Parameter Measurement
  • Aperture Diameter Ø 300 mm
  • Focal Length 1200 mm
  • Focal Ratio 4
  • Field of View 1.07°(H) x 1.07°(V)
LAF-TMS (Linear-Astigmatism-Free Three-Mirror System)
Mechanical Design
  • Telescope development conducted in collaboration with the Korea Astronomy and Space Science Institute
  • Optomechanical design and analysis through assembly/alignment conducted by KASI and Green Optics
  • First telescope case applying LAF-TMS (Linear-Astigmatism-Free Three-Mirror-System) design
  • Primary mirror: Ø 385 mm / Secondary mirror: Ø 123 mm / Tertiary mirror: Ø 156 mm
  • Aligned within RMS < 120 nm and 2 pixels across the entire field
04
Polishing and Measurement Results
Req. PM SM TM
PV 135 nm 121.7 nm 97.5 nm 110.8 nm
RMS 20 nm 14 nm 6.3 nm 15 nm
05
MSF analysis (Mid-Spatial frequency impact analysis plays a crucial role in LSB observation)
PSF simulation
EE simulation
06
Assembly Alignment and Results (uniformly aligned across entire FOV 1.07º x 1.07º)
06
Observation Results: NGC 5907 (compared with Subaru telescope) / M101 (compared with Dragonfly telescope)
  • NGC 5907 celestial observation results confirmed the possibility of LSB (> 28 mag/arcsec²) celestial observation with a 300 mm class aperture
  • Successfully observed the same dark brightness as the 8.2 m aperture Subaru telescope