Re: Laser Beam Diameter

From: David K. Leigh (
Date: Sat Apr 08 2000 - 00:15:49 EEST

The physical diameter does not change (or shouldn't depending on optics). But, the effective diameter does. If you were to turn the laser on in 1 spot for a full second and measure the melted powder, it would be significantly larger than the measured spot size. There is no easy answer to the smallest size, but we've never been able to build 0.020" in the X-Y plane with repeatable success (there are exceptions depending upon orientation) or 0.008-0.010" in Z (living hinges).

David K. Leigh ph(254) 933-1000
Harvest Technologies fax(254) 298-0125

  ----- Original Message -----
  From: J Mitchell
  Sent: Friday, April 07, 2000 2:41 PM
  Subject: Laser Beam Diameter

  For a 50 Watt CO2 laser, used on the SLS, does the laser beam diameter change at a smaller laser power? Or is the beam diameter constant at 0.016" from 0 to 50 Watts?

  J Mitchell

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