There is a desire to have Spool cameras looking at the ITMs--One to show only Green light & one to show only IR light. Currently we only have one camera looking at the ITMs, we want to have (2) GigE Digital cameras with proper filters to look at the ITMs. This is to aid in alignment with the Green & IR lasers.
I received filters (from MidOpt Systems) this afternoon and measured transmission of Green & IR light through each of the filters. I had the laser point at an Ophir Power Meter, noted power, then placed filter in front of power meter and noted power. Here are the results:
IR laser set to ~0.474W
Transmission through the filters = power with filter (w/o filter)
- BP550-62 = 3.5 mW (0.474 W)
- LP550-62 = 0.448 W (0.492 W)
- BN532-62 = 0.390 W (0.493 W)
- LP920-62 = 0.475 W (0.487 W)
- Hoya R72 = 0.472 W (0.501 W)
Green laser set to ~100.5 mW
Transmission through the filters = power with filter (w/o filter)
- BP550-62 = 79.8 mW (101.1 mW)
- LP550-62 = 7.14 mW (100.9 mW)
- BN532-62 = 75.8 mW (101.2 mW)
- LP920-62 = 7.12 mW (100.6 mW)
- Hoya R72 = 6.83 mW (100.6 mW)
The links for the filters above give info on them and Transmission v. Wavelength charts. The Filters are M62 (62mm thread). They can be screwed on the output of our Butterfly electric zoom lens. These lens would then be installed on our Digital GigE cameras (with a beam expander in between?).
Next thing to be done would be to see if any of these filters will work.
A wiki showing information for cameras is on the H1 Camera Page.
