HartWfsSTP (Hartman Wavefront Sensor Special Tilt Processing) is an advanced version of HarmannWfsDft that allows for special handling of tilt placed in the tilt register of the reference wave. If stpFlag = 0, tilt from the reference wave is handled in the code by a series of grid shifts before and after the DFT's. If stpFlag = 1, tilt in the reference wave is ignored. If stpFlag = 2, tilt from the reference wave is put into the field (like HartmannWfsDft). HartmannWfsDft models a Hartmann wavefront sensor. For each incident wavefront, the field over each subaperture is propagated to the detector plane (at the common focal plane of the subaperture lenslets) using an DFT, then the fields from all the subapertures are superposed, and the resulting intensity computed. HartWfsSTP can model any number of subapertures, in any geometry. Subaperture geometries are generally created using AoTool, as part of setting up an adaptive optics geometry. If multiple wavefronts are received simultaneously they are assumed to be mutually incoherent, so their intensities add. The intensity is then integrated over the exposure interval, then, after an optional delay used to model readout time, it becomes available as an output. HartWfsSTP does not itself add sensor noise; for that one would run it's output through a SensorNoise block. Like all WaveTrain optical sensors, HartWfsSTP works with both pulsed and continuous wave illumination. HartWfsSTP is a subclass of the class IntensitySensor, from the WaveTrain class library.

Parameters
wavelength	float	Wavelength at which sensor is sensitive (m)	1.0e-06
nxyPupil	int	Used ONLY with Wavesharing (see WT User Guide)	512
dxyPupil	float	Used ONLY with Wavesharing (see WT User Guide)	0.01
nxyDetector	int	Number of sample points across FULL sensor plane	512
dxyDetector	float	Spacing of sample points in sensor plane (m)	10.0e-06
subapWidth	float	Width of subapertures in the pupil plane (m)	0.1
detectorPlaneDistance	float	(m) Usually equal to focalDistance, but allowed to differ.	1.0
focalDistance	float	Focal length of lenslets (m)	1.0
magnification	float	Magnification of lenslet array	1.0
overlapRatio	float	Controls overlap of propagated subaperture fields (0.0->abutting)	0.0
xSubap	Vector<float>	X-coordinates of the subap centers in the pupil plane (m)	Vector()
ySubap	Vector<float>	Y-coordinates of the subap centers in the pupil plane (m)	Vector()
xSlope0	float	X slopes to be output prior to the first complete sample (rad)	0.0
ySlope0	float	Y slopes to be output prior to the first complete sample (rad)	0.0
stpFlag	int	0 = handle ref wave tilt by shifting grids; 1 = ignore ref wave tilt; 2 = place ref wave tilt into field	0
Inputs
incident	WaveTrain	Incident light	WaveTrain()
on	bool	on/off switch (on=true, off=false)	true
exposureInterval	double	Time between start of successive exposure windows (s)	0.001
exposureLength	double	Length of each exposure window (s)	0.000001
sampleInterval	double	Time between samples within one exposureLength (s)	0.0
Outputs
integrated_intensity	Grid<float>	Temporally-integrated intensity at focal plane (J/m^2)
slopes	Vector<float>	Subaperture wavefront x-slopes followed by y-slopes (radians of tilt angle)
Subsystems
Last Saved: Thu Jan 24 13:45:42 MST 2008 by TVE version 2007B