Optical system and head mounted display
AssigneeGoertek Optical Technology Co., Ltd.
InventorsQi Sun, Bogang Zhao
Life of this patent
Estimating the term…
Abstract
An optical system and a head mounted display are disclosed. The optical system comprises: a third lens, a second lens and a first lens arranged successively along a propagation direction of incident light. There are three Fresnel surfaces in the optical system, and two of the Fresnel surfaces are arranged adjacent to each other. The third lens has a positive focal power. A field of view of the optical system is ≥100 degrees. The present disclosure provides a solution of optical structure with short-focus, high light efficiency and large FOV. The optical system according to the present disclosure can be applied in, for example, a head mounted display.
Claims17
An optical system, comprising:
- a third lens (3), a second lens (2) and a first lens (1) arranged successively along a propagation direction of incident light;
- wherein there are three Fresnel surfaces in the optical system, and two of the Fresnel surfaces are arranged adjacent to each other;
- the third lens (3) has a positive focal power;
- a field of view of the optical system is ≥100 degrees;
- an effective focal length f1 of the first lens (1) is 30 mm≤f1≤40 mm;
- an effective focal length f2 of the second lens (2) is 40 mm≤f2≤460 mm;
- and
- an effective focal length f3 of the third lens (3) is 65 mm≤f3≤115 mm.
Dependencies are inferred from the claim text.