Borofloat 33 反射鏡，MAX R 488nm-514.5nm

The coating is doing exactly what it should—my 488nm beam is bouncing back with almost zero loss, and the mirror surface stays cool even after a long alignment session. I wasn't expecting such a clean spectral range for this price, but it's held up through dozens of test runs.

Swapped this in for the stock mirror on my 514nm argon setup and the reflection is noticeably tighter, barely any scatter. Runs cool too, which tells me the coating really is absorbing almost nothing. Alignment held up fine after a full evening of beam time.

Installed this mirror in my argon laser line and the reflectivity at 488nm is spot on—virtually zero loss. The narrowband coating delivers exactly as specified.