| J.-Ch.Barriere, H.Blumenfeld, M.Bourdinaud, O.Cloue, C.Guyot, F.Molinie, P.Ponsot, J-C.Saudemont, J.-P.Schuller, Ph.Schune |
We have developed two different optical systems
in order to position detectors with respect to a
reference laser beam. The first system, a
telescope, permits the absolute positioning of
an element with respect to a reference laser beam.
The resolution is of the order of 10 microns in
translation and 50 micro-rad in rotation. It is
highly transparent (~90%) permitting several
elements to be aligned. A calibration procedure
has also been studied and is currently being
tested in order to obtain an absolute alignment
information. The second system is a highly
transparent (95%) two dimensional position sensor
which allows the accurate positioning (below
20 microns) of several (up to ten) elements to
which each sensor is attached, transversally to
a laser beam used as a reference straight line.
The present useful area of the first sensor is
20x20 mm2 and is 15x15 mm2 for the second. In both
case it can be further increased to meet the
experiment's requirement. |
