Space-Based optics

Satellite-based observatories and optics program rely on 4D to ensure successful performance in the challenging conditions of space. The current designs for space-based optics include more aspheric elements for weight and size reduction, segmented optics that can be folded into spacecraft, and a variety of exotic materials that must be tested at the functional wavelength. Many mission-critical optical systems are also tested at cryogenic conditions inside environmental chambers to verify their post-launch characteristics.

4D PhaseCam Twyman-Green interferometers measure small and large concave elements and primary and secondary mirrors. PhaseCam systems can measure over long path distances despite air turbulence, and into environmental test chambers despite the heavy vibration from pumps associated with the chambers.

AccuFiz Fizeau interferometers measure flat, concave and convex spherical optics, and can measure through view ports to test optics at cryogenic temperatures in vacuum chambers.

4D is proud to be one of the primary metrology partners in the development of the James Webb Space Telescope, and on dozens of other projects to explore space and understand our planet.