Abstract: The present invention relates to the field of optical devices, and discloses an optical display device and an AR display device. The optical display device includes an image source, a first dispersive prism, a second dispersive prism, and a first lens. The image source is disposed on a side of a first surface of the first dispersive prism, and the first lens is fitted closely with a second surface of the first dispersive prism. A first surface of the second dispersive prism is fitted closely with a third surface of the first dispersive prism. The first surface of the first dispersive prism is on a side close to eyes of a wearer. A first half-transparent half-reflective film is disposed on a surface on a side of the first lens away from the first dispersive prism.

Abstract: The present invention relates to the field of optical devices, and discloses an optical display device and an AR display device. The optical display device includes an image source, a first dispersive prism, a second dispersive prism, and a first lens. The image source is disposed on a side of a first surface of the first dispersive prism, and the first lens is fitted closely with a second surface of the first dispersive prism. A first surface of the second dispersive prism is fitted closely with a third surface of the first dispersive prism. The first surface of the first dispersive prism is on a side close to eyes of a wearer. A first half-transparent half-reflective film is disposed on a surface on a side of the first lens away from the first dispersive prism.

Abstract: A projection lens, comprising: a first lens, a first glued lens, a second glued lens and a sixth lens, the first lens has a negative focal power; the first glued lens comprises a second lens and a third lens, the second lens is located between the first lens and the third lens, the second lens and the third lens are glued to each other on opposing surfaces thereof, and the first glued lens has a positive focal power; the second glued lens comprises a fourth lens and a fifth lens, the fourth lens is located between the third lens and the fifth lens, the fourth lens and the fifth lens are glued to each other on opposing surfaces thereof, and the second glued lens has a negative focal power; the sixth lens has a positive focal power.

Abstract: Disclosed are a projection lens group and a projection device. The projection lens group is used to project light, and includes a first lens group and a second lens group, wherein the first lens group and the second lens group are sequentially arranged in a propagation direction of the light, the first lens group has a positive focal length, the second lens group has a negative focal length. A focal length of the first lens group denoted by f1, and a focal length of the second lens group denoted by f2 satisfy: 120.0 mm<f1<128.0 mm, and ?47.0 mm<f2<?40.0 mm. In the present solution, a projection image can be projected with a shorter distance.

Abstract: Disclosed are an AR projection assembly and an AR device, and the AR projection assembly comprises: an image displaying source, the image displaying source including a Micro-LED single-color displaying element and a Micro-LED dual-color displaying element; a light combining element, the light combining element being disposed on light emitting paths of the Micro-LED single-color displaying element and the Micro-LED dual-color displaying element and configured to combine single-color light given off by the Micro-LED single-color displaying element and dual-color light given off by the Micro-LED dual-color displaying element into a full-color image; a lens assembly, the lens assembly including a first lens, a second lens and a third lens which are disposed in sequential proximity to the light combining element on a light emitting path of the light combining element, the first lens and the third lens having a positive focal length, and the second lens having a negative focal length.