Documentation

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Main Collimator

[Main Collimator]

Basic Data

ManufacturerOptical Surfaces Ltd. (UK)
Ident. 61114-1
DateJune 1998
Substrate Zerodur
Description Off-axis paraboloid cut from parent parabola
Focal length1501 mm
Wavefront0.068 lambda p-V, 0.011 lambda rms @ 633 nm
CoatingBalzers Silflex VIS

Layout of parent parabola

The Main- and Transfer Collimators were cut from a single parent parabola: [Parent Parabola]

Wavefront aberrations

The interferogram and its analysis gives a wavefront aberation of 0.068 lambda p-V, 0.011 lambda rms @ 633 nm over the full aperture.

Interferogram (100 % pupil):
[Main Collimator Interferogram]

Coating

Balzers Silflex VIS The following picture shows the reflectivity measured on the witness piece:

[Coating Reflectivity]

[Rainbowline]

[INDEX]

[Rainbowline]

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FEROS homepage / A.Kaufer@lsw.uni-heidelberg.de
Last modified: Fri Jan 26 12:20:27 MET 2001