## What is Virtual Propagation?

Question: What does it mean to do a virtual propagation of rays?

Authored By: Mark Nicholson

Published On: December 29, 2015

## Why is it called Zemax?

Question: Why is the company and the original optical design program called Zemax? What does Zemax mean?

Authored By: Ken Moore

Published On: September 30, 2015

## How to Convert FWHM Measurements to 1/e-Squared Halfwidths

Sometimes, manufacturers provide Gaussian beam data as Full Width Half Maximum (FWHM) measurements.  This article describes how to convert FWHM measurements to 1/e^2 halfwidth measurements, which are used by Zemax.

Authored By: Dan Hill

Published On: April 4, 2007

## How to Specify Intermediate Field Points

This article explains what the optimum values for the intermediate fields should be relative to the maximum field.

Authored By: Name-Hyong Kim

Published On: April 3, 2007

## How to Determine Which Material Catalog is Being Used

This article explains how to determine which material catalog is being used as the source of the material data for a specific surface/object. This is especially important when multiple material catalogs are loaded containing one or more materials with the same name.

Authored By: Andrew Locke

Published On: September 17, 2015

## Introduction to the OpticStudio Demo

This article describes how to use the OpticStudio demo to explore the capabilities of the software prior to purchase.

Authored By: Akash Arora

Published On: October 2, 2014

## How to Locate Geometry Errors

• The various reasons for Geometry Errors (Error 10561) when using Zemax in Non-Sequential mode
• How to diagnose these errors

Authored By: Dan Hill

Published On: August 4, 2015

## Can I Change the {Data} Folder?

This article explains the operation of the {Data} folder that Zemax OpticStudio creates on first use.

### IMPORTANT NOTE: This applies primarily to OpticStudio 16.5 Sp5 and lower.

In OpticStudio 17, we now offer the option to change the primary {DATA} folder and also moved the DLL, Extend and UDO folders to within the {DATA} folder by default instead of the Opticstudio installation folder (normally Program files\Zemax OpticStudio). Details on this new functionality are covered in the built in help of OpticStudio 17.

Authored By: Mark Nicholson

Published On: September 11, 2015

## What is the Zexport.msg file?

This article explains what the Zexport.msg file is and what it is used for.

Authored By: Andrew Locke

Published On: August 24, 2006

## What is this Knowledge Base For?

This article explains what the Knowledge Base is and what it is used for.

Authored By: Mark Nicholson

Published On: September 16, 2015

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