startest: Star test simulator

In mlpeck/zernike: Zernike Polynomials

Star test simulator

Description

Simulates a star test.

Usage

startest(wf=NULL, zcoef=NULL, maxorder=14L, phi=0,
	lambda = 1, defocus=5, cp=NULL,
	obstruct=NULL, npad = 4, 
	gamma=2, psfmag=2, displaymtf=TRUE, displaywf=FALSE)

Arguments

wf	A matrix of class pupil containing wavefront values
zcoef	Vector of Zernike coefficients
maxorder	maximum Zernike polynomial order
phi	Angle to rotate wavefront
lambda	Wavelength, in same units as coefficients
defocus	Amount of defocus in waves
cp	pupil parameters
obstruct	Obstruction fraction
npad	Pad factor for FFT
gamma	Gamma value for graphics display
psfmag	Magnification factor for in focus PSF display
displaymtf	Logical: Display MTF?
displaywf	Logical: Display calculated wavefront?

Details

If wf is NULL the wavefront is calculated from the the Zernike coefficients (which should be non-NULL).

Value

A list with the following components:

psf	The in focus point spread function.
otf	The complex optical transfer function, a complex matrix of size pupilsize.
mtf	The modulation transfer function, a real matrix of size pupilsize.

Author(s)

M.L. Peck [e-mail]

References

Born, M. and Wolf, E. 1999, Principles of Optics, 7th Edition, Cambridge University Press.

Suiter, H. R., 1994, Star Testing Astronomical Telescopes, Willman-Bell, Inc.

See Also

Zernike, pupil.

mlpeck/zernike documentation built on Aug. 21, 2024, 8:32 p.m.