Encircled/Ensquared Data

Navigation: Displaying and Manipulating Data (Charts) > New (LightningChart) Charts > Encircled/Ensquared Data

Page Contents

Description

Navigation

Controls

Application Notes

•Write data to file/output window

•Plotting data

Related Topics

Description

This feature computes the encircled/ensquared energy values for an analysis dataset, typically from an irradiance calculation. These values are commonly used as a performance metric to determine the fractional amount of energy contained in a certain diameter on an image plane.

Navigation

The Encircled/Ensquared Energy calculation is accessed by right mouse clicking in the 3D chart view and selecting "Encircled/Ensquared Data" from the list menu.

Controls

Control	Inputs / Description	Defaults
Type and Sampling
Encircled/Ensquared	Select encircled (circular area) or ensquared (square area) for calculation.	Encircled
Number of Sample Points	Resolution of sampling.	11
Center Point
At center point	Set center of calculation to center of window.	Not selected
At peak value	Set center of calculation to peak value in window.	Selected
Data Table
Tabulated values	Radius, Value, Fraction	N/A

Update Table	Accept settings and keep dialog box open.
Dismiss	Dismiss this dialog box
Help	Access this Help page.

Application Notes

Writing data to file/output window

Right mouse-clicking in the data spreadsheet area allows selection of two data output options. The option "Write to File" creates a *.dat file in a specified directory with a header containing the calculation type (Encircled/Ensquared), number of samples, center point specification followed by the three-column dataset. The option "Write to Output Window" prints the same information to FRED's output window.

Plotting data

Right mouse-clicking in the data spreadsheet area allows selection of a Plot option to graphically display the fraction encircled/ensquared energy vs. radius using FRED's chart viewer.