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: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. At least one of the first lens to the seventh lens is a glass lens. The third lens has positive refractive power, and an image-side surface of the third lens is a convex surface. An object-side surface of the seventh lens is a convex surface, and an image-side surface of the seventh lens is a concave surface. A maximum field-of-view FOV of the optical imaging lens assembly satisfies FOV?134.56°. An effective half-aperture DT62 of an image-side surface of the sixth lens and an effective half-aperture DT72 of the image-side surface of the seventh lens satisfy 0.54?DT62/DT72.

Abstract: The present disclosure discloses an optical imaging lens assembly including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. At least one of the first lens to the seventh lens is a glass lens. The third lens has positive refractive power, and an image-side surface of the third lens is a convex surface. An object-side surface of the seventh lens is a convex surface, and an image-side surface of the seventh lens is a concave surface. A maximum field-of-view FOV of the optical imaging lens assembly satisfies FOV?134.56°. An effective half-aperture DT62 of an image-side surface of the sixth lens and an effective half-aperture DT72 of the image-side surface of the seventh lens satisfy 0.54?DT62/DT72.

Abstract: A method, a device, and a system for implementing a video call are provided. The method includes: when a video call initiated by a calling party is received, performing media negotiation with the calling party and initiating the video call to a called party; and after the called party makes a response, performing media negotiation with the called party and completing establishment of a video voice channel between the calling party and the called party; and when an indication of the calling party and/or the called party is received, processing a video according to the indication. With the method, device, or system of the present invention, the calling and called users can change video contents viewed by the other party or by himself/herself, which provides the capability of actively controlling the video contents for the calling and called users that conduct a video call and improves the users' interactive capability during the video call.

Abstract: A method, a device, and a system for implementing a video call are provided. The method includes: when a video call initiated by a calling party is received, performing media negotiation with the calling party and initiating the video call to a called party; and after the called party makes a response, performing media negotiation with the called party and completing establishment of a video voice channel between the calling party and the called party; and when an indication of the calling party and/or the called party is received, processing a video according to the indication. With the method, device, or system of the present invention, the calling and called users can change video contents viewed by the other party or by himself/herself, which provides the capability of actively controlling the video contents for the calling and called users that conduct a video call and improves the users' interactive capability during the video call.