×
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

Jobs

PRODUCTION OF LENSE USING PMMA.

PRODUCTION OF LENSE USING PMMA.

PRODUCTION OF LENSE USING PMMA.

(OP)
pls could somebody give me some tips on the production of lense using polymethylmethacrylate as the base polymer?and a well formulated table will be appreciated

RE: PRODUCTION OF LENSE USING PMMA.

I've worked with PMMA and it's fine for some things. Keep in mind that if you are casting you will be working with a finished material that is not fully cross linked, which can lead to free radicals and interactions with oxygen. If you are injection molding then you need to find an optical grade PMMA. Tooling with these materials is very expensive and it is difficult/expensive to hold tolerances comparable glass optics. Have you considered using an optical grade silicone? I've found that some of the new injection moldable optical silicones have superior properties to thermal plastics and they are less expensive to tool. These materials are also great for prototyping. Clarity is same as PMMA, temperature range is up to 200 C and over, yellowing in UV is not a problem. I could go on and on.

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!


Resources