Lot 6 camera projector lenses glass mult. size convex & flat cabochons? magnify?

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Lot 6 camera projector lenses glass mult. size convex & flat cabochons? magnify?
Let me first apologize for the fact I have no earthly idea what these things fit. Used or new, their age or manufacturer.  What I do know is that I found a bunch of them of various sizes, shape and form at an estate sales of a man who worked in radio and TV repair and on projectors on the side. I would appreciate any information you are willing to share because this is only the beginning.
The largest is convex on both sides Weighs 1 pound 1.5 oz
The smaller to the right is 1 side convex
The 3rd is blue with copper coloring around 1 side and looks wavy like old glass, it came in the package below showing 405/2217
Lower left is opened package 8-006 2 sided convex
Then there is another 8-006 unopened
Lastly an 8-011 unopened made in Japan I think 2 sided convex
These items have no known issues, due to uniqueness there are no returns.