×
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

F-Theta Lens and HeNe Issues

F-Theta Lens and HeNe Issues

F-Theta Lens and HeNe Issues

(OP)
I'm using Linos F-Theta lens, some with the PG coating, some without.  The laser source is 1064nm (Fiber) and the lenses are appropriate for the wavelength.  The issue is when using the guide laser, which - although it's not really - we refer to as the HeNe, as the mark moves closer to the boundry of the marking window, the guide laser traces the mark closer in both the X and Y axis to the center.  That is to say... If I am marking a 25mm square box near the top left, or any corner, of the marking window, when I test the mark w/ the galvos and the HeNe, the mark is traced closer in both directions to center.  Now, without any changes, the 1064nm laser is fired the actual ablated mark is further away in both directions from center.

I believe, because of very limited, very simple testing that the reason for this is that the Linos F-Theta lens is treating the visible HeNe light different than the IR 104nm light.  

This is trouble for visual setup, etc.  

Any ideas or suggestions would be greatly appreciated...

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



News


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