COMPOSITE LENS AND DISPLAY SYSTEM CONTAINING IT Russian patent published in 2018 - IPC G02B3/10 G02C7/06 G02B27/01 

FIELD: physics.

SUBSTANCE: composite lens can be used in virtual reality devices. The composite lens comprises a central portion of the lens having the first focal length and at least one peripheral portion of the lens surrounding the central portion and having the second focal length. The first focal length is greater than the second focal length. The central portion of the lens and at least one peripheral portion of the lens have coincident focal planes. Within the range α, which determines the value of the central part of the observed object, the following equality is performed: where Δ₀ - the distortion caused by the central part of the lens; Δ - the distortion caused by the peripheral part of the lens; - the focal length of the central part of the lens; ƒ' - the focal length of the peripheral part of the lens.

EFFECT: improving the image quality by using a composite lens that provides a higher resolution in the central part of the image and a lower resolution in the peripheral part of the image.

30 cl, 53 dwg, 2 tbl