(FFT thickness 5000 10000 2048 5 20 1.7)

Computes and returns the FFT thickness using 2048 points between 5000 and 10000 1/cm (obtained by interpolation of the measured spectrum). The refractive index used in the method is 1.7, the thickness is searched between 5 and 20 microns.

(FFT thickness 2 5000 10000 2048 5 20 1.7)

Computes and returns the FFT thickness using 2048 points between 5000 and 10000 1/cm (obtained by interpolation of the measured spectrum). The refractive index used in the method is 1.7, the thickness is searched between 5 and 20 microns.This method first determines the highest point of the Fourier transformed data in the specified search interval, and then takes the peak average round this point, taking 3 points to the left and 3 points to the right in addition to the central point.

(FFT thickness 3 5000 10000 2048 5 20 1.7)

Computes and returns the FFT thickness using 2048 points between 5000 and 10000 1/cm (obtained by interpolation of the measured spectrum). The refractive index used in the method is 1.7, the thickness is searched between 5 and 20 microns.This method takes the weighted average of the whole thickness search range - each point in the search range is weighted with the value of the power spectrum.

(Largest difference in interval 400 700)

Returns the largest difference between simulated and measured values in the given interval, i.e. taking the absolute value of the difference.

(Largest difference position in interval 400 700)

Returns the spectral position of the largest difference between simulated and measured values in the given interval.

(L* D65 2°)

Returns the color coordinate L*, computed for the illumation spectrum D65 and an observation angle of 2°. Possible values for the color coordinates are L*, a*, b*, X, Y, Z, x, y, z, l, a and b. Illumination spectra can be A, D65 and C, and observation angles of 2° and 10° may be used in the expression.

(Maximum difference in interval 400 700)

Returns the largest value of the function simulated value - measured value in the given interval

(Maximum difference position in interval 400 700)

Returns the spectral position of the largest value of  the function simulated value - measured value in the given interval

(measured average 2000 3000 50)

This function returns the average of the measured spectrum between the spectral positions 2000 and 3000 (nm, eV, 1/cm or whatever spectral unit the object has at the moment), computed using 50 points.

(measured integral 2000 3000 50)

This function returns the integral of the measured spectrum between the spectral positions 2000 and 3000 (nm, eV, 1/cm or whatever spectral unit the object has at the moment), computed using 50 points.

(Measured interval maximum 400 700)

Returns the maximum of the measured data in the spectral interval [400, 700]

(Measured interval maximum position 400 700)

Returns the spectral position of the maximum of the measured data in the spectral interval [400, 700]

(Measured interval minimum 400 700)

Returns the minimum of the measured data in the spectral interval [400, 700]

(Measured interval minimum position 400 700)

Returns the spectral position of the minimum of the measured data in the spectral interval [400, 700]

(measured value at 540 nm)

This function returns the value of the measured spectrum at 540 nm.

(Minimum difference in interval 400 700)

Returns the smallest value of the function simulated value - measured value in the given interval

(Minimum difference position in interval 400 700)

Returns the spectral position of the smallest value of  the function simulated value - measured value in the given interval

(simulated value at 540 nm)

This function returns the value of the simulated spectrum at 540 nm.

(simulated average 2000 3000 50)

This function returns the average of the simulated spectrum between the spectral positions 2000 and 3000 (nm, eV, 1/cm or whatever spectral unit the object has at the moment), computed using 50 points.

(simulated integral 2000 3000 50)

This function returns the integral of the simulated spectrum between the spectral positions 2000 and 3000 (nm, eV, 1/cm or whatever spectral unit the object has at the moment), computed using 50 points.

(simulated interval maximum 400 700)

Returns the maximum of the simulated data in the spectral interval [400, 700]

(simulated interval maximum position 400 700)

Returns the spectral position of the maximum of the simulated data in the spectral interval [400, 700]

(simulated interval minimum 400 700)

Returns the minimum of the simulated data in the spectral interval [400, 700]

(simulated interval minimum position 400 700)

Returns the spectral position of the minimum of the simulated data in the spectral interval [400, 700]

(Thickness from fringes 1000 1600 0.05 20 3 2)

Analyzes the maxima of interference patterns in the spectral range 1000 to 1600 (spectral unit taken from the spectrum). The function returns the layer thickness of layer 3 in the layer stack which is assigned to the spectrum. Pairs of interference maxima are taken into account only if their height is larger than 0.05 and if the peaks are separated by at least 20 (spectral unit taken from the spectrum). The function averages over 2 pairs of peaks. This function should be applied only in the case of a single layer causing the interference pattern.

Whole range measured amplitude

Returns maximum-minimum of the measured data

Whole range measured average

Returns the average of the measured data

Whole range measured maximum

Returns the maximum of the measured data

Whole range measured minimum

Returns the minimum of the measured data