Composites One
Published

James Webb Space Telescope primary mirror fully assembled

The mirror consists of 18 primary mirror segments, each 1.3m wide and mounted on a composite backplane structure. The telescope will be launched in 2018.

Share

NASA reports that the 18th and final primary mirror segment is installed on what will be the biggest and most powerful space telescope ever launched. The final mirror installation at NASA’s Goddard Space Flight Center in Greenbelt, MD, US, marks an important milestone in the assembly of the agency’s James Webb Space Telescope.

Using a robotic arm reminiscent, the team meticulously installed all of Webb's primary mirror segments onto the composite telescope structure. Each of the hexagonal-shaped mirror segments measures just over 4.2 ft/1.3m across — about the size of a coffee table — and weighs approximately 88 lb/40 kg. Once in space and fully deployed, the 18 primary mirror segments will work together as one large 21.3-ft/6.5m diameter mirror.

“Scientists and engineers have been working tirelessly to install these incredible, nearly perfect mirrors that will focus light from previously hidden realms of planetary atmospheres, star forming regions and the very beginnings of the Universe,” says John Grunsfeld, associate administrator for NASA’s Science Mission Directorate in Washington. “With the mirrors finally complete, we are one step closer to the audacious observations that will unravel the mysteries of the Universe.”

"Completing the assembly of the primary mirror is a very significant milestone and the culmination of over a decade of design, manufacturing, testing and now assembly of the primary mirror system," says Lee Feinberg, optical telescope element manager at Goddard. "There is a huge team across the country who contributed to this achievement."

While the primary mirror installation may be finished on the tennis court-sized infrared observatory, there still is much work to be done.

"Now that the mirror is complete, we look forward to installing the other optics and conducting tests on all the components to make sure the telescope can withstand a rocket launch," says Bill Ochs, James Webb Space Telescope project manager. "This is a great way to start 2016!"

The mirrors were built by Ball Aerospace & Technologies Corp., in Boulder, CO, US. Ball is the principal subcontractor to Northrop Grumman for the optical technology and optical system design. The installation of the mirrors onto the telescope structure is performed by Harris Corp., a subcontractor to Northrop Grumman. Harris Corp. leads integration and testing for the telescope.

“The Harris team will be installing the aft optics assembly and the secondary mirror in order to finish the actual telescope,” says Gary Matthews, director of Universe Exploration at Harris Corp. “The heart of the telescope, the Integrated Science Instrument Module, will then be integrated into the telescope. After acoustic, vibration and other tests at Goddard, we will ship the system down to Johnson Space Center in Houston for an intensive cryogenic optical test to ensure everything is working properly.”

The James Webb Space Telescope is the scientific successor to NASA's Hubble Space Telescope. It will be the most powerful space telescope ever built. Webb will study many phases in the history of our universe, including the formation of solar systems capable of supporting life on planets similar to Earth, as well as the evolution of our own solar system. It’s targeted to launch from French Guiana aboard an Ariane 5 rocket in 2018. Webb is an international project led by NASA with its partners, ESA (European Space Agency) and the Canadian Space Agency.

Nanoparticles filled epoxy adhesives
Ad showing Janicki CNC Mill machining part in tool
Park Aerospace Corp.
Fire Retardant Epoxies
Vacuum and Controlled Atmosphere furnaces
Wickert Hydraulic Presses
Composites One
Integrico Equipment Auction
Airtech
CompositesWorld
Alpha’s Premier ESR®
HEATCON Composite Systems

Related Content

Feature

A new era for ceramic matrix composites

CMC is expanding, with new fiber production in Europe, faster processes and higher temperature materials enabling applications for industry, hypersonics and New Space.

Read More
Trends

Cryo-compressed hydrogen, the best solution for storage and refueling stations?

Cryomotive’s CRYOGAS solution claims the highest storage density, lowest refueling cost and widest operating range without H2 losses while using one-fifth the carbon fiber required in compressed gas tanks.

Read More
Plant Tours

Plant tour: Joby Aviation, Marina, Calif., U.S.

As the advanced air mobility market begins to take shape, market leader Joby Aviation works to industrialize composites manufacturing for its first-generation, composites-intensive, all-electric air taxi.

Read More
Aerospace

The state of recycled carbon fiber

As the need for carbon fiber rises, can recycling fill the gap?

Read More

Read Next

Cyanate Ester

Composites stabilize space-based telescope

Composite Primary Mirror Backplane Support Structure to hold James Webb Space Telescope’s thermal stability within extremely tight 38-nm dimensional tolerance.

Read More
CAMX

VIDEO: High-rate composites production for aerospace

Westlake Epoxy’s process on display at CAMX 2024 reduces cycle time from hours to just 15 minutes.

Read More
Design/Simulation

Modeling and characterization of crushable composite structures

How the predictive tool “CZone” is applied to simulate the axial crushing response of composites, providing valuable insights into their use for motorsport applications.

Read More
Composites One