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Fabian F. Voigt edited this page Mar 11, 2019 · 1 revision

Setting the L3 to L4 distance

Overview: Collimating the 1:1 relay between galvo and ETL

Excitation path The next step is to set the distance between L3 and L4 correctly. For this, an alignment collimator and a shear plate can be used.

Collimating the 1:1 relay between galvo and ETL

L3 and L4 form a 1:1 pupil relay between the tunable lens and galvo scanner. The flint (negative) elements should face each other.

Take M5 out again and put the alignment collimator up so that the beam enters L3 and gets reflected by M4 along the raised FLS-40 rail. Excitation path

Then, put in the lens mount carrying L3 and attach / place a shearing interferometer in the beam path. Excitation path Excitation path

Another way of adding a collimator to set the L4 to L3 distance: Excitation path

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