REVISION DATE: 01-Jul-2019 18:17:00

BS1+splitter+shortFO+Lu via sphere+incandescent through 2x polarizers. The idea was to check the polarization ability of the optics to extinguish all signal when the optical axes were crossed. The Melles Griot specs say the polarizers are good for 350-650 nm range, so one might expect their ability to polarize light past 650 nm to decrease. There was really only 2 net-signals measured, with the 2 optical axes parallel and with the axes crossed. I had to increase the exposure time when they were crossed. The interesting thing I saw was Mike Kehoes IR artifact pop out with the polarizers crossed!

June 2019 Ken asked or the ratio of the crossed and uncrossed data. So I added figure 6 below.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5