Figure 4: Optical aberrations and focal lengths of silicone lenses.
From: Design and fabrication of a passive droplet dispenser for portable high resolution imaging system
(a) The optical bench setup using a SHWS that has been used for optical characterization of the lenses. (b) Optical characteristics of the lenses are summarized using Zernike modes of various orders. Comparison among the silicone lenses and a commercial aspheric lens has been shown in a chart. Zernike modes 1, 2, 3 and 5 which are piston, tilt and tip, were not included as they do not represent true aberrations from the lenses. Higher Zernike modes with negligible values were also ignored. (c) Plot of magnitude (unit wavelengths) of spherical aberrations (Zernike mode 13) with lenses of various focal lengths. (d) Relationship between the dip numbers and the corresponding focal lengths of the lenses.
