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Webbs Mirrors - NASA Science A James Webb Space Telescope primary mirror segment blank This image shows the back of the mirror blank, which is carved out in this pattern to make the mirror segment light, yet maintain its integrity
JWST Telescope - JWST User Documentation The primary mirror serves as the aperture stop for most JWST observing modes, with the exceptions of coronagraphy and aperture masking interferometry (AMI) The unobscured collecting area of the primary mirror is 25 4 m 2
Optical Telescope Element - Wikipedia Another optics testbed is called JOST, which stands for JWST Optical Simulation Testbed, and uses an MEMS with hexagonal segments to simulate the degrees of freedom of the primary mirror alignment and phasing
Mirrors | ESA Webb The James Webb Space Telescope uses two mirrors to perform science operations The telescope’s primary mirror is made of 18 hexagonal-shaped mirror segments, each 1 32 metres in diameter and weighing approximately 20 kilograms
Behind James Webb Space Telescopes iconic mirror | Space Webb's primary mirror spans 21 feet, 4 inches (6 5 meters) across and is made up of 18 hexagonal mirror segments measuring 4 3 feet (1 32 m) in diameter Webb also has a small secondary
JWST Primary Mirror - Universe Watcher The James Webb Space Telescope's primary mirror enables groundbreaking scientific capabilities Its design allows for observation of the earliest galaxies, formed over 13 billion years ago, by detecting their infrared light stretched by the expanding universe
About — JWST Images The James Webb Space Telescope’s primary mirror consists of 18 hexagonal mirror segments made of gold-plated beryllium that combine to create a 6 5-meter-diameter (21 ft) mirror
JWST Mirror Technology Development Results JWST requires a Primary Mirror Segment Assembly (PMSA) that can survive launch, deploy and align itself to form a 25 square meter collecting area 6 5 meter diameter primary mirror with a 131 nm rms wavefront error at temperatures < 50K and provide stable optical performance
JWST Mirror Production Status - svc. org The JWST mirrors are constructed from lightweight beryllium substrates and the primary mirror consists of 18 hexagonal mirror segments each approximately 1 5 meters point to point
Testing the James Webb Space Telescope Primary Mirror The JWST 6 5 m diameter primary mirror is nearly a parabola with a conic constant of -0 9967 and radius of curvature of 15 880 m at 30K The primary mirror is divided into 18 segments with 3 different prescriptions