SimpleFieldSensor reports the temporally-integrated complex field of the incident wavetrain (see the WT User Guide for a discussion of this physical quantity). The complex grid of the WaveTrain is first interpolated from the propagation mesh onto the sample mesh specified by nxy & dxy; phase due to tilt and focus in the reference wave of the WaveTrain is then added to the sample grid. If multiple wavefronts are received simultaneously they are assumed to be mutually coherent, so their complex fields add. See the WT User Guide for detailed discussion of the treatment of interference in WaveTrain sensors.
See the WT User Guide for a detailed discussion of the triggering of sensor exposures. Note in particular that the input "sampleInterval" is only used to generate multiple samples within one "exposureLength". To obtain one sample per "exposureLength" (the typical practice), set "sampleInterval" to 0.0.
Like all WaveTrain optical sensors, SimpleFieldSensor works with both pulsed and continuous wave illumination. It has a single WaveTrain input, representing the incident light.

Parameters
wavelength	float	wavelength at which this sensor responds (m)	1.0e-06
nxy	int	Number of sample points across sensor	512
dxy	float	Spacing of sensor sample points (m)	0.01
Inputs
incident	WaveTrain	Incident Wavetrain to be sampled	WaveTrain()
on	bool	Flag indicating whether or not the sensor is on	true
exposureInterval	double	exposure interval	0.001
exposureLength	double	exposure length	0.000001
sampleInterval	double	Time between samples within one exposureLength (s)	0.0
Outputs
fld	Grid<Complex>	Temporally-integrated complex field
Subsystems
Last Saved: Thu Mar 15 11:53:56 MDT 2007 by TVE version 2008A