Kataoka, Ohishi, Kokeyama
We installed PR2 and BS cameras. Attached photos are the images with illumunation.
Unfortunately, we cannot see anything on PR2 although we are sure that the laser is hitting on it, when no illumination. Our laser is too dark / our cameras are too insensitive to see the single trip light. We can see the spot on only MCO mirror (the 3rd last attachment), which is inside the IMC. That's the inly spot we can see by camera right now. So I don't think cameras attached on the EX/EY viewports can help the 3km alingment. They should be placed to catch the direct light in the end station if we want to use them for the initial alignment. Or maybe we can test if we can see anything when the laser is scattered a lot by hitting the suspension frame.
> They should be placed to catch the direct light in the end station if we want to use them for the initial alignment
So, please read [kagra-ioo 03146] and [kagra-ioo 03147], for example. I will install a viewport window (ICF152) for camera to catch the direct light at each end, anyway. It would be nice to install cameras on the viewports...
Yes, I recognize one more set of camera is coming to each end station. Now they are not optional anymore and we do need them, I meant.