Paraxial lens design of anamorphic lenses with a fixed anamorphic ratio

A design method of anamorphic optical system

“…Currently, most anamorphic systems are designed to add an anamorphic accessory that has no optical focal length of its own on the basis of a conventional optical system. The anamorphic attachment consists of a pair of two unfocused column lenses, which are usually placed in front (common configuration for fixed-focus anamorphic systems) behind (common configuration for zoom optical systems) and in the middle (not fundamentally different from the above two configurations of the optical system) 10 .…”

Design of a miniature anamorphic lens with a freeform front group and an aspheric rear group

“…Many efforts have been devoted to exploring the structures of anamorphic lenses of this kind, resulting in three basic types: the front anamorphic attachment type, the middle anamorphic attachment type, and the rear anamorphic attachment type. [1][2][3][4][5][6][7][11][12][13][14][15][16] Among the three types, the front anamorphic attachment type brings the least aberration and is the conventionally preferred type in fixed-focal systems. 11,12 Yuan and Sasián 12,13 studied aberration properties for anamorphic lenses using cylindrical or toroidal elements and proposed a set of aberrations formulas, fD i g, for the design process.…”

“…Zhang et al 14 studied the thin lens aberration properties for anamorphic lenses and put forward a paraxial lens design method, and they also studied the condition when the anamorphic ratio is related to object distance and derived the formula to obtain a constant ratio in thin lens approximation. 15 Different structures of anamorphic lenses using double curvature elements were widely analyzed and discussed by Dodoc 16 in 2019. Most recently, a big data technique was utilized to explore the feasible solution space for anamorphic lenses.…”