Originally Posted by rmohanr
Do you know the dimensions of them?
Is anybody have these and willing to give me dimensions? height, width/base, length etc
I am trying to get it done with Corning Glass (I don't if it is BK7). My friend has optical unit who used to make cinema scope lens for small villages in India. If I can get good workable dimensions then I can ask him to send me some prototypes.
Sizes of Prismasonic's prisms? Small. The rear prism is just 85mm high x 65mm wide. Front prism is about 125mm wide 85mm high. Too small for me and anyone with a recessed front lens (with the exception of optima and maybe a few others).
Take another look at diyaudio and see the optic prisms we are discussing there...
The set I've ordered are 170mm x 140mm...Not coated though...but I will take them to an optical store and see if they can coat them for me...If not, I have found a company that makes optic grade flat glass that IS optically coated, and for $25, I'll add another "element" to the new lens I am making...
Originally Posted by Steve Scherrer
What is the function of the antireflective coating? Does it merely absorb excess light that would normally reflect from the surface--or light coming in on a particular angle? Does it really affect the function of a prism? The only benefit for anamorphic lenses is if it actually increased the amount of light that goes through the lens. Does this occur? I wouldn't think so, but if someone has an explanation for how it works, let me know--thanks!
I have seen antireflective films on the market (like this one --> http://www.shopzilla.com/8N_-_cat_i..._oid--465956142
Would it function to reduce reflection and increase the efficiency of the prism?
Basically, those that did the DIY lens from diyaudio (myself included) experienced light reflections on the screen at some point. It can be caused by light out the ends of the prisms (the thick end of the front prism for HE) which needs to be blackened out. The other issue is sometimes a bright scene will cuase a reflection from the screen onto the surface of the front prism and reflect back onto the screen. Anti-reflection coatings prevent this.
I still do not have anti coating on my water prisms, but I know now that most reflections can be prevented from proper prism alignment...
I doubt the product you've provided a link for will work on a lens. It is like a contact adhesive, designed to be clear when applied directly on the surface and then viewed in the line of sight, not when light passes through and over distance like in front projection...