TV102 Laser Image

Just thought I would shoot my laser collimater through the lens of my TV102. Looks like the outer lense is crown glass while the inner is SD glass. There is no light path visible throught the inner glass - could it be a flourite type glass element?

Thoughts?

Attached Image:

Danny Vettoretti said:

Just thought I would shoot my laser collimater through the lens of my TV102. Looks like the outer lense is crown glass while the inner is SD glass. There is no light path visible throught the inner glass - could it be a flourite type glass element?

Thoughts?

You really need to do it with a brighter green laser. If that doesn't show, then the element is fluorite (not fluor-crown). However, I understand there are some, perhaps lesser, varieties of fluorite that show a faint path.

Clear skies, Alan

I thought the TV102 was a doublet.