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How Do I Monitor and Control Usage of the Network Key?

This article is for server administrators using a Zemax OpticStudio or Lensmechanix network softkey or red USB hardkey. It covers logging license usage, password protection, user and computer restrictions, as well as the detachable license feature to use a license seat when not connected to the network. You will need to complete the steps to setup the network license on the server first, per the article How to Install the Network License Version of OpticStudio

This article is not intended to address monitoring usage of black USB network dongles. For information on monitoring black USB network keys, please visit this page.


Introduction to the Sentinel Admin Control Center

Viewing user sessions and checked out licenses


License seat check out on the client

Q&A for Softkey and Red USB Network Licenses

Addendum: Restarting the Sentinel LDK License Manager Service to fix issues

Authored By: Alissa Wilczynski

Published On: October 4, 2016

What Are The S and P Polarization States?

Question: What are the S and P polarization states, and how do I enter a beam that is s-polarized?

Authored By: Mark Nicholson

Published On: August 1, 2007

What Happens if a License is Lost, Stolen or Damaged?

This article describes Zemax policy on replacing lost, stolen, or damaged softkeys and hardkeys.

Authored By: Kristen Norton

Published On: June 20, 2017

Why is the Nominal Criteria Different From the Value Reported Elsewhere?

This article will talk about what the nominal criteria is and how we arrive at that value.

Authored By: Dan Hill

Published On: March 21, 2007

How to Submit Vendor Data To Be Distributed With Zemax

This article describes the format and process for materials manufacturers to submit material data for inclusion in OpticStudio.

Authored By: Mark Nicholson

Published On: January 9, 2017

Why Do Rays Trace Behind a Fold Mirror Surface?

This article explains:
  • Why rays sometimes appear to trace behind fold mirror surfaces
  • How to fix this problem
  • The benefits of the “Add Fold Mirror” tool

Authored By: Andrew Locke

Published On: October 14, 2015

What Does "Not Enough Segments Allocated to Trace All Possible Ray Paths" Mean?

This article describes the reasons for the following error messages:

  • Not Enough Segments Allocated to Trace All Possible Ray Paths!
  • Not Enough Intersections Allocated to Finish Ray Trace!

This article explains why these errors should NOT be ignored, how they may be fixed, and outlines the difference between a segment and an intersection.

Authored By: Dan Hill

Published On: October 14, 2015

How to Create Apertures and Off-Axis Mirrored Sections in Non-Sequential Mode

This article explains:
  • How to create off-axis parabolic mirror in Non-Sequential mode.
  • How to vignette rays which fall outside a defined aperture in Non-Sequential mode.  A slit aperture is used as an example.



Authored By: Dan Hill

Published On: December 16, 2015

What are the .SES and .CFG Files?

This article explains what the the session (.SES) and configuration (.CFG) files are, and what they do.

Authored By: Dan Hill

Published On: August 2, 2006

What Are The Ray And Field Coefficients in the Coatings Calculation?

Question: When doing polarization ray-tracing through thin-filmcoatings, Zemax reports reflection, transmission and phase data using"ray" and "field" coefficients. What are these, how are they different,and which one should I use?


Authored By: Mark Nicholson

Published On: May 1, 2006

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