Zernike Standard Coefficients
Calculates the Zernike Standard coefficients.
Sampling: Specify the density in the pupil to use for coefficient fitting. Larger grid sizes are more accurate, although the computation time increases.
Maximum Term: Specify the maximum Zernike coefficient to compute. Any value up to 231 may be specified.
Wavelength: The wavelength number to use for the calculation.
Field: The field number to use for the calculation.
Ref OPD To Vertex: Normally, ZEMAX references the OPD to the chief ray; which in effect subtracts out tilt from the wavefront phase. For interferometry, it is sometimes desirable to retain the wavefront tilt. Checking this option on will add tilt to the beam based upon the deviation of the chief ray from the image surface vertex. This option is only useful for field positions whose chief ray is reasonably close to the surface vertex, where the assumption that tilt is described by the deviation of the chief ray is valid.
Surface: Selects the surface at which the data is to be evaluated. This is useful for evaluating intermediate images.
Subaperture Data --> Sx, Sy, Sr: Defines a subaperture of the pupil to compute the Zernike data for. See the discussion in the ZEMAX User's Guide for more information.
Discussion: The Zernike Standard data displays the individual coefficients as well as the peak-to-valley, RMS, Strehl ratio, variance, residual RMS fit error, and maximum fit error.