Visual optical system

Abstract

The present application discloses a visual optical system, which includes, along the optical axis from the human eye side to the image source side: a first element group with positive optical power; a second element group with optical power; a third element group with positive optical power; the first element group includes a first lens, a quarter-wave plate, and a reflective polarizing element; wherein, for the visual optical system, the effective focal length is f, the effective focal length of the first element group is F1, and the combined focal length of the second element group and the third element group is f23, and they satisfy: 1.5 < f / F1 + f23 / f < 6.0. Through the visual optical system of the present application, the first element group has positive optical power, which is beneficial to converging light rays and meets the actual application conditions. The quarter-wave plate can convert light rays between the circular polarization state and the linear polarization state. Combining with the transmission of polarized light rays in a specific direction and the reflection characteristics of the orthogonal direction by the reflective polarizing element, the optical path is folded, which is beneficial to realizing a short focal length and wide angle design within a limited TTL range.

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