Common optical system parameters and
metrics for EOIR sensors.
Name |
Dimension |
Type |
Description |
Effective
focal length |
SmallDistanceUnit |
Real Number |
The effective focal length as defined by the user
for the EOIR sensor band. |
F number |
Unitless |
Real Number |
Optical system F-number as defined by the user for
the EOIR sensor band. |
Diffraction wavelength |
SmallDistanceUnit |
Real Number |
The wavelength used internally for diffraction
calculations as defined for the EOIR sensor band. |
Airy disk
diameter |
AngleUnit |
Real Number |
Diameter of the bright central lobe of the
diffraction point spread function. |
Rayleigh
resolution |
AngleUnit |
Real Number |
Limiting resolution of the optical system as
defined by Rayleigh's resolution criterion. |
Sparrow
resolution |
AngleUnit |
Real Number |
Limiting resolution of the optical system as
defined by Sparrow's resolution criterion. |
Ensquared energy |
Unitless |
Real Number |
Fraction of power in a point source which falls
within the boundaries of a pixel centered on the point source. |