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MOONS has taken delivery of the two high-resolution H-band VPH diffraction gratings. These beautiful looking gratings were manufactured by Kaiser Optical Systems, Inc.  in US and represent a remarkable technical achievement. Only a handful of such large gratings for these wavelengths and resolutions have ever been manufactured, and MOONS made the task even more challenging as its large … Continue reading New year, new gratings

MOONS has reached a major milestone. After years of planning, photons are about to pass through many metres of fibre, millions of pounds of optics and finally arrive on the detectors. This will be the first test of the full light path of the instrument, and indeed the first time many of the different components … Continue reading The photons are coming

Last week, the MOONS team at UKATC fitted all the fixed optics into their mounts and subsystems. This is an exciting milestone towards the full assembly of the instrument! The two fixed optics assemblies inside MOONS splits the light up to the three cameras on each side of the main bench. It does this using … Continue reading Installing the Fixed Optics

The first test "lift and fit" of the fixed optics in MOONS cryostat has been successfully completed last week by the team at UKATC. The activity is being led by our optical engineer Martin Black. As with everything on this project the pieces of glass are large, and in turn, so are the parts needed to hold them. Fully … Continue reading Lifting and fitting fixed optics

After a shutdown in operations at the end of March due to the pandemic, the MOONS Cambridge team working on camera assembling, testing and alignment is now back in action, already making excellent progress (and sharing impressive photos!). After access to the clean room for the first time (with some restrictions) in mid-July, the team … Continue reading Cooling down of MOONS cameras!

All the parts for the MOONS Rotating Front End Structure, after manufacturing by CUNHOL (Portugal), are now at the IA (Lisbon) MOONS integration room and the entire main structure, including its retraction and screen mechanisms, have been fully integrated. The MOONS rotating front-end is a large assembly that will be mounted on the VLT Nasmyth rotator … Continue reading The powerful rotating front-end

The MOONS cryostat has arrived in Edinburgh – and it’s big. This is a key milestone for the project and allows much of the major assembly to really get under way. MOONS will be unique in providing wavelength coverage out to 1.8 microns, with a high multiplex. But this comes at a cost: to work … Continue reading Blue MOONS

A new milestone towards the MOONS completion has been achieved with the manufacturing and delivery of the high-resolution H-band silicon prisms. These large optical components, considered one of the main challenges of the instrument design due to their size and surface quality requirements, were designed by the INAF team in Arcetri, Florence. After a lengthy … Continue reading HR-H silicon prisms in the house

The first box of production FPUs finally arrived this week!  These will be inspected, then tested on the automated verification rig and compared against the factory end-of-line report.  Assuming they all perform as well as expected, subsequent batches will begin to roll in quickly. Installation onto the baseplate won't commence until fibres are delivered and … Continue reading First FPU delivery

MOONS recently took delivery of two of the largest optical components in the instrument: the main collimator mirrors for each spectrograph manufactured by KiwiStar Optics in New Zealand. Last week a team from Arcetri Observatory, Florence came to Edinburgh to install these two large optics within the not-insignificantly sized mounting structures that they had designed for … Continue reading Collimation