×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

reflective circular polarizer

reflective circular polarizer

reflective circular polarizer

(OP)
Has anyone come across a sheet polarizer that transmits one direction of circularly polarized light while reflecting the other? 3M makes one (DBEF) for linearly polarized light and I've heard that Merck makes one for circularly polarized light but I haven't been able to find any.

thnaks in advance

RE: reflective circular polarizer

contact Reveo

www.reveo.com

They make a broadband, reflective circular polarizer using cholesteric liquid crystal polymers.  I think they can use both glass and plastic substrates.

Good luck,

Steve

RE: reflective circular polarizer

(OP)
Not exactly what I was looking for (it's not in sheet format like a plastic polarizer) but probably just as relevant. Big help. Thanks.

RE: reflective circular polarizer

You could also make your own, if you are so inclined.  Just buy sheets of DBEF and sheets of plastic quarter-wave retarder film.  This is a standard item from lots of companies (I evaluated pieces from American Polarizer and they were pretty good).

I know that Reveo was working on making large-format plastic sheets of the circular polarizing film, but I lost track of their progress.  

good luck,

Steve

RE: reflective circular polarizer

(OP)
I've actually done this. A piece of DBEF between two retarders more or less does what we need. However, the error in most wave sheets means that the polarization state of both the reflected and transmitted light is not very 'clean' after passing through two retarders. If you take two pieces of retarder and place them between two linear polarizers in an orientation that extinguishes the light, then the extinction is never as good a only two crossed polarizers- same issue.
 Ideally, we'd find the material in question that performs the desired operation in one step. I'm looking for the stuff after seeing the material referenced in a patent. The guy said Merck made it, I've tried evry possible way to get in touch with someone knowledgable at Merck with no luck...
thanks again.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close