## What is a Ray?

This article explains:
• What a ray is
• Rays and wavefronts
• Coordinates, cosines, and propagation
• Refraction, reflection, and diffraction
• Amplitude. phase and optical path

Authored By: Ken Moore

Published On: December 2, 2015

## Understanding Paraxial Ray-Tracing

This article explains:
• What paraxial rays are
• What parabasal rays are
• Differences between them that can cause confusion

The article is accompanied by a ZIP archive containing the samples used and a macro. This can be downloaded from the final page of the article.

Authored By: Mark Nicholson

Published On: July 21, 2005

## What is an "Effective F-Number"?

This article explains:
• The meaning of F-Number for optical systems with non-circular stops
• The theoretical basis for the defined effective F-Number in Zemax

Authored By: Ronian Siew

Published On: December 29, 2015

## How to Model Corner-Cube Retroreflectors

Corner Cube retroreflectors are commonly used in a wide range of optical systems. This article describes various different ways in which these components can be modeled in Zemax OpticStudio. The treatment can be as detailed as the user needs, with effects due to face misalignment, roofline straddling, thin-film coatings, diffraction etc included as required.

Authored By: Mark Nicholson

Published On: December 14, 2015

## How to Debug a Double-Pass Lens File

This article describes an easy way to test whether a double-pass lens file is correctly set up, or not, and to identify where any errors are.

Authored By: Mark Nicholson

Published On: January 4, 2016

## How to Model a Scanning Mirror

This article explains:
• How to set up the coordinate breaks needed to make a scanning mirror
• How to use the Multiple Configuration Editor to sample multiple scan angles
• How to set up a galvanometer-style scanning mirror, where the mirror tilts about its vertex
• How to set up a polygon scanning mirror, where the mirror tilts about an offset point

The article is accompanied by a ZIP archive containing the sample Zemax OpticStudio files used. This can be downloaded from the final page of the article.

Authored By: Mark Nicholson

Published On: December 15, 2015

## How to Generate Cross-Section and Moment Data for an Extended Source using Geometric Image Analysis

This article describes how to use the Geometric Image Analysis feature to generate cross-section plots of and moment data (centroid, RMS width) for an extended source. This feature may also be used to generate results for a point source (in the limit where the source size is set to zero), allowing Geometric Image Analysis to supplement results provided by the Spot Diagram.

Authored By: Sanjay Gangadhara

Published On: December 15, 2015

## What Does the Sampling Correspond to in Wavefront-Based Calculations?

This article describes how to interpret the sampling used in wavefront-based analyses such as the Wavefront Map, the PSF and the MTF.

Authored By: Ken Moore

Published On: December 15, 2015

## How to Draw Specific Rays in Zemax Layouts

This article explains:
• How to draw desired rays in the Zemax OpticStudio Layouts via the RAYLIST
• What the RAYLIST is
• The difference between IMPLICIT and EXPLICIT methods for defining rays in the RAYLIST
• How to use each format with visual aids

Authored By: Dan Hill

Published On: October 14, 2015

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

This article explains how to create a log of usage for both red network hardkeys and network softkeys.  Additionally, it covers the most important controls and settings used by the network administrator for the network softkeys, including license check out.

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

CONTENTS:

Authored By: Alissa Wilczynski

Published On: October 4, 2016

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