THORLABS MDFM-MF2 Assembly Manual page 5

Olympus MF2 Filter Cube Assembly Manual
Coating
See Edge
Observed to
Transmission
the Edge
Reflective
Uncoated Side
(Coated) Side
Figure 5. Dichroic mirror orientation
When held at an angle, the coated side will appear uniform in reflection all the way to the edge. The
uncoated side, when held at the same angle, will not have a uniform reflection near the edge. There will
be a band of transmission that appears through the uncoated substrate. It is important to determine the
coated and uncoated sides of the dichroic mirror as there is only one orientation that will work with the
Filter Cube.
Step 5
Place the dichroic mirror under the retaining clip, making sure the mirror seats properly in the recess.
The reflective surface of the dichroic mirror should face UP.
Reflective
(Coated) Side
Figure 6. The dichroic mirror mounted in the emitter half cube
Slowly tighten the retaining clip screws until snug. Caution: Do not over tighten the retaining clip
screws as this may damage the dichroic mirror.
21396-D02 Rev A, August 27, 2010 Page 5 www.thorlabs.com