I look foward to the day when you put in the numbers and it decides what to do and does it. Actually no, becuase then the ATMer is obsolete :) I will continue...
Hey everyone. I've heard of strain testing using two polarized sun glass lenses by using a flashlight / lens / blank / lens / eye sandwhich. I've also heard...
... I obtain my "off the shelf" null lens elements from the CVI Laser corp; although a bit more expensive than most catalog sources, CVI garauntees lambda/10...
Tom: Check the photos section under "Curve generator" for pics I have uploaded of an older vintage Strasbaugh 7M. This example was built in 1973, has a 24"...
It's the sun, reflection at large angle, glass, lens, eye. The thing that happens is that at large angles, the light polarizes and that is one of the two...
Hi, Sorry for the double post, people also in telescopes will get this twice How do i make a 10" f/6 curve template? Apart from drawing a 120" circle and ...
Yep, the basic procedure is to take a long piece of rod of some kind and put a pencil at the appropiate place - making the pencil rigid to the rod is more...
Hello gents, I took all your info about "my first ronchi test" and have proceeded carefully, I'm at a stoping point because it looks like I'm on the edge of...
Perhaps you could think more and obey less. You need to understand that glass has TWO different light speeds: one speed for light waves polarized parallel to...
What you need is a source of polarized light. How you get it does not matter. I like to use skylight filtered by a large polaroid filter. You can get a...
Some of the help you get here will be contradictory. This forces you to THINK to sort out the truth from the orthodox dogma (which occasionally may be true). ...
Mitch, You can not use a CRT based computer screen. You can only use LCD type screens because they work by polarizing the light comming from the light behind...
www.atmsite.org exists to host atm related material that has no other home on the www. The original intent was to host material that atm's had put up on a web...
I'm trying to find a site that describes using a projector+polarizer+mirror blank-+--(standing at a distance)handheld polarizer+eye system, anyone recall that?...
I always thought that the strain produces a rotation of the polarization of hte light directly. Changing the speed won't make the polarization display that...
Amen on microcrud's misuse of HTML coding! I pride myself in stating that my website is Microsoft code form free. Microsoft coding can take a page with less...
If you put a piece of most clear plastics (birefrigent) in a polarizer setup and then bend it you'll see the strain patterns move, those are the areas where...
If path length were the cause of the change of polarization, you'd see it quite well with ordinary plate glass as the one side has a nice wave pattern in it...
Only with LCD monitors, a CRT display does not produce polarized light. If you have a widescreen home theatre LCD TV then you are laughing since you will have...
Bob, I'm not saying it's path length, I'm saying it's birefringence. Where the (structured amorphous) glass is under stress there's a preference for (long)...
Hi, How do i make a 10" f/6 curve template? Apart from drawing a 120" circle and cutting a part out of that. Is there anywhere i can get a printout Instead of...
Take a 10"+ piece of sheet metal abour 3" wide (preferably aluminum aroud 16 guage). scribe a 60" radius curve. Cut curve with shears (tin- snips). Place a...
Hello ATMs, I am new here! ... other ... Hmm.. would a wiki be a better option for storing such material. Wikis allow any body to edit and add new content in a...
Hi, Talquence. Shouldn't this be 120" for a 10" f/6? (Focal length 60", Radius 120") Also, Avnish, I've never made a secondary myself, but have been told that...
Dave Tabor Your right of course. When I'm awake I catch little errors like that. However ..... As for diagonal mirrors; quite q bit of the float glass in the...
