diylabs fresnel/mirror question

[slickhorn]

Has anyone attempted a split fresnel solution using Alan's 12.2" fresnels?

If so, will the trimmed fresnels cover the full 12" of a 15" LCD, or is there still a portion of the LCD that is unusable?

Are the fresnels plastic? Material is not specified, but I doubt they're glass...

Also, are the mirror panels Alan sells a first surface mirror?

Is his glass panel low e or IR blocking glass, or just generic glass? He doesn't list any specs...

 

[jcbklyny]

I havent done this myself... and I could be wrong, but I think I remember reading that people got alot more out of their panel but there was still a tiny portion of the screen that didnt show.

And I cant see how a 13" x 13" glass panel could be first surface of any quality if it's only 9 bucks!

 

[cruser]

slickhorn
i am about to split alans 12.2 fresnel right now
the largest area it will alow the lcd to display is 11 7/8 "
the fresnels are plastic

 

[slickhorn]

Thanks Cruser!

loss of 1/8" I can live with! Thanks!

Like most, I'm a fan of pics if you've got the time to take 'em! ;-)

 

[cruser]

i will post some pics of the spliting prosess in about 20 minutes
the whole thing only takes like 2 minutes but im waiting for my buddy to stop by its his fresnel

 

[cruser]

heres a pic before i started

 

[cruser]

this one is after i cut the edges

 

[cruser]

next i cut the corners

 

[cruser]

and finaly lift the top off

 

[cruser]

if you can get a router table its a piece of cake takes less than 2 minutes

 

[slickhorn]

awesome pics!

I'll borrow my uncle's shop. Thanks for posting those!

 

[doughboy]

I split the 12.2 fresnel with a dremel and a cutting wheel. Cut off most of the excess platic around the edge and then dremeled any area that was not completely split. Took me about 20 minutes. May not be the straightest or easiest, but got the job done.

An externally hosted image should be here but it was not working when we last tested it.