Apq

Intensity at point Q' (diffraction PSF)

Eq. (3.435)

Io

Intensity at point Q'0 on the principal ray (diffraction PSF)

Eq. (3.437)

Symbol

Meaning

Where defined

Io

Intensity at point Q0 on the principal ray in the absence of aberrations (Strehl Intensity Ratio)

Eq. (3.458)

I (suffix)

Pertaining to the image (Fourier transform theory)

Eq. (3.504)

i

Fourier transform of intensity function I

Eq. (3.505)

Jo, Ji

Bessel functions of the zero and first orders

Eq. (3.440), Eq. (3.441)

k

A constant (2n/A) in the diffraction integral

Eq. (3.434)

(l+n)k(m+n) ,n

Coefficients of the Hamilton Characteristic Function

Eq. (3.14), Eq. (3.16)

kpl

Dimensionless profile constant for an aspheric (Schmidt) plate

Eq. (3.238)

kz

"Ripple" amplitude (for Strehl Intensity Ratio)

Eq. (3.479)

Lw

Fraction of the total energy enclosed within the diffraction angle w

Eq. (3.448)

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