×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Optical properties of Acrylic at elevated temperatures

Optical properties of Acrylic at elevated temperatures

Optical properties of Acrylic at elevated temperatures

(OP)
I am in a situation where I have a 40mm thick piece of Acrylic between two polarizers.  My problem is that the acrylic turns birefringent at around 35 deg C, and optical performance is badly degraded.  I have contacted Ineos about Perspex, but it is not available in the right thickness in the US.  DOes anyone know of a material with similar optical performance (>90% transmissivity, ~1.5 refractive index, with superior thermal characterisitcs.

Thanks
Andy

RE: Optical properties of Acrylic at elevated temperatures

Try ATOHAAS North America Inc  800 523 1532 or 215 785 8290.

Other possibilities:   Cyro Industries 203 795 6081

                            ICI Acrylics    800 386 2175

Good Luck
 

RE: Optical properties of Acrylic at elevated temperatures

Why you do not take e.g. from the company BULKHEAD to glass in Mainz. With plastics you have always the problem with the high thermal expansion.
Sincerely
Heinz Federau
federau@web.de

RE: Optical properties of Acrylic at elevated temperatures

Try TOPAS from TICONA. It is a cyclo-olefinic copolymer with excellent optics and a high glass transition temperature and a low thermal expansion, so I assume this would solve your birefringence problems.

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

White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each person’s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. 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