synth.interferogram: Synthetic Interferogram
In matwey/Rfringe: Rfringe

Description Usage Arguments Details Value Note Author(s) See Also Examples

Computes and displays a synthetic interferogram for a wavefront constructed from a vector of Zernike coefficients.

1 2	synth.interferogram(zcoef, zlist = zlist.qf, phi = 0, size = 255, obstruct = 0, iname = "")

`zcoef`	Vector of Zernike coefficients, with piston term as the first element
`zlist`	A list with named components `n, m, t` describing the contents of `zcoef`
`phi`	angular coordinate to rotate entire coordinate system
`size`	Size of matrix representing pupil
`obstruct`	central obstruction fraction
`iname`	short string for identification

It's important to note that zcoef is treated differently than in other functions that use the same variable name. The first element must be a piston (constant) term, which is stripped off and passed to pupil as the piston argument. The length of zcoef therefore should be one more than the length of zlist$n.

A size by size matrix of intensity levels in the simulated interferogram.

The relationship between wavefront phase and intensity is iwf <- cos(2 * pi * wf + pi), which is the value returned by synth.interferogram. The plot routine in this function plots the image on a 256 level grayscale.

M.L. Peck mpeck1@ix.netcom.com

Zernike, pupil.

zcoef <- c(0, 3, 3, rnorm(length(zlist.qf$n)-2, mean=0, sd = .01))

temp <- synth.interferogram(zcoef, iname="Random wavefront")

# lets see what it looks like in a star test

zcoef <- zcoef[-1]
zcoef[1:2] <- 0
fraunhofer(zcoef, displaywf=TRUE)