For 10 points, identify these phenomena, the deviations from a predicted image which can come in spherical or chromatic varieties.
The Strehl ratio gives the ratio of the Gaussian point with this phenomenon present to the point without it, and, with additional terms, Zernike polynomials can be used to test for them. Tilt and piston are two types, and another form may result from a low Abbe number or if the refractive index varies for different wavelengths. One of the simpler cases may result if the shape of a lens is not consistent. For 10 points, identify these phenomena, the deviations from a predicted image which can come in spherical or chromatic varieties.
The Strehl ratio gives the ratio of the Gaussian point with this phenomenon present to the point without it, and, with additional terms, Zernike polynomials can be used to test for them.
optical {aberrations}