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Message ID: 186     Entry time: Mon Jun 5 16:41:59 2017
Author: Aidan 
Type: Laser 
Category: Hartmann sensor 
Subject: HWS long term measurement results. 

The data from the long-term measurement of the HWS is presented here. The beam envelope moves by, at most, about 0.3 pixels, or around 3.6 microns. The fiber-launcher is about 5" away from the HWS. Therefore, the motion corresponds to around 30 micro-radians (if it is a tilt). The beam displacement is around 4 microns.

The optical properties change very little over the full 38 days (about 2 micro-radians for tilt and around 2 micro-diopters for spherical power).

The glitches are from when the SLED drivers were turned off temporarily for other use (with the 2004nm laser).

Attachment 1: HWS_envelope_long_term.pdf  134 kB  | Hide | Hide all
HWS_envelope_long_term.pdf
Attachment 2: HWS_optical_parameters_long_term.pdf  153 kB  | Hide | Hide all
HWS_optical_parameters_long_term.pdf
Attachment 3: HWS_envelope_long_term_mm.pdf  140 kB  Uploaded Mon Jun 5 17:49:12 2017  | Hide | Hide all
HWS_envelope_long_term_mm.pdf
Attachment 4: IMG_9836.JPG  468 kB  Uploaded Mon Jun 5 17:54:59 2017  | Hide | Hide all
IMG_9836.JPG
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