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So I have further developed a stainless steel rimless concept frame.
No glue, no parts to cut.
Super easy to assemble and un-assemble, as required.
No compression.
Solid mechanical assembly.
No parts protrude from lens front surface, so easy to clean or adapt a clip on.
I am at the advanced prototype stage and getting ready to actually produce some of these things.
https://youtu.be/1dxc7yC4VGs
Thats pretty neat. I like that it doesnt rely on plastic nuts or compression plugs. Looks like you could simply add a magnet to the end of it for a chemistrie style clip-on.
Thanks - the parts are stainless steel, i guess i could look into that possibility, whether a magnetic clip would work....Quote:
Originally Posted by Alex Camblor
But yes - there is no compression the set screw really links together the frame and the lens by simple threading. I am suprised how strong the assembly is.
That would require a custom post length for every job in order to get the magnet flush with the lens front, which does not practical.Quote:
Originally Posted by Alex Camblor
So the set screw cuts threads into the lens materiel on the inside of the hole the first time it is screwed in? Is there a minimum lens edge thickness to make this work?
100% exactly that. The threaded hole created is half in the frame, half in the lens.Quote:
Originally Posted by Kwill212
I think at 1.8 mm edge thickness up to 5mm there is no issue at all. Have tried a wide range of Rx and materials. No failures yet.
PC, 1.6 etc...
Obviously it works in CR39 but probably a poor choice...
The cool part is you can disassemble and reassemble as many times as you need, and the screw finds the same threads .