Correct. We can see the flashes clearly on our new ETM camera, but we see absolutely nothing on the ITM.
Unfortunately, the camera is in the path of the green beam, so we'll have to figure out a more permanent plan. Right now the laser at the end is shuttered.
Measuring the power now....
Pretty fancy work actually...I wouldn't have guessed that you need to look at the back of the ETM. Does this mean that we can't see the flashes from inside the arm cavity? If so, its a pretty remarkeable statement about the wide angle scatter of the new mirrors. Do we really have 1W going into the MC?