Briana Chen - posted 10:33, Wednesday 03 July 2024 - last comment - 13:06, Wednesday 03 July 2024(11705)
Weird fiber collimator packaging
One of the 650-1050 nm CFC5A-B fiber collimators (new) from Thorlabs does not have the front yellow covering on it. The one that did not have the covering (left in picture) is labelled #1 on top of the mount.
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That is just protective Kapton tape. It will work just fine. It may just be a little more dusty than it should be. You can try the new football-shaped air puffer on it.