Optical Surfaces has supplied a motorised 155mm aperture UV-VIS-NIR
collimator system and interferometric alignment system to the Optical
Information Systems Group at the Deutsches Zentrum für Luft- und
Raumfahrt (DLR) in Berlin, Germany.
DLR is Germany's national research centre for aeronautics and space.
Its extensive research and development work in aeronautics, space,
transportation and energy is integrated into national and international
cooperative ventures. As Germany's Space Agency, the German federal
government has given DLR responsibility for the forward planning and
implementation of the German space programme as well as international
representation of Germany's interests.
Ilse Sebastian, Project Manager at DLR commented "The primary aims of
installing this new system in our class 100,000 clean room will be to
enable broad-band diffraction limited imaging for MTF measurement,
focusing and geometric calibration of single optics and focal planes,
fully integrated camera systems and imaging spectrometers at
wavelengths between 230 nm and 2.6 µm. Exact positioning of
targets at the collimator focus is achieved using x,y,z step motors
that deliver movement steps of better than 1 arc second.
Thermal sensors incorporated into the body of the collimator will allow
us to make measurements immune to operating temperature changes.
To monitor and verify that the system is consistently in alignment -
Optical Surfaces also designed and supplied a software-operated Laser
Unequal Pathlength Interferometer (LUPI) system to interface with the
collimator system". She added " We selected Optical Surfaces Ltd for
this important and challenging custom specified project because of its
considerable expertise and experience in producing complete collimator
assemblies based around high precision optics and its decades of
experience which ensure that in mounting the optics, performance is not
Dr Aris Kouris of Optical Surfaces Ltd commented "The DLR project
presented us with a series of challenges that required the considerable
optomechanical expertise of our design, development and production team
to solve". "The result of our collaboration with DLR has been to
produce a motorised broadband (UV to IR) collimator system which is
able to make geometrical calibration, focusing and MTF measurements on
optics, camera systems and spectrometers with multiple degrees of
freedom and unmatched accuracy".
For further information please visit http://www.dlr.de/en/