Stefan, Keiko (Thanks to Yamakoh, Tanaka-kun, and Taya-san)

To check the beam spots on MCI and MCO again, the through beam from PMC was quickly aligned to STM1 thru the IMC. The input beam was checked with the laser leveler in the PSL room with the mark. Then the spot at the MCI iris is roughly aligned. This way the beam hit the STM1 at the center in YAW, slightly low in PIT.

Attached pictures are some records for the IMC beam spot checking on MCI. There is the iris just before MCI, where the input beam from PSL comes (see the first picture).  The second picture shows the beam spot after transmitting the MCI mirror, and the iris is seen over the mirror. So the spot is assume somewhere inbetween the iris and the spot, where slightly (~1cm) off to the +Y direction in yaw.  We tried to place the camera on the beam axis between MCI and O.

The third picture is taken from a place roughly where the beam is transmitting, looking at the input beam spot at the iris with the laser card. This image also indicates the spot would be off to +Y in yaw (although it's really difficult to tell).

Note: The input power was 200mW from the PSL, and nothing was really visible by the IR viewer on the mirror surfaces.