An imaging objective suitable for rgb‑d cameras

Abstract

An imaging objective lens suitable for RGB-D cameras disclosed by the present invention has a first lens, a first spacer, a second lens and a third lens that are bonded sequentially from the object side to the image side in the lens barrel to form an imaging lens . The imaging objective lens adopts a three-piece spherical mirror structure, and each lens has one mirror surface as a plane and the other surface as a spherical surface, with low processing cost. At the same time, the second lens and the third lens are closely bonded without spacers, and the structure is compact. It is compact, and the radius of the three lenses is the same, and the assembly process is simple. In the wide spectral region from visible light to near-infrared, the imaging clarity is high, the optical performance is excellent, and it can reach a large field of view of 65°, and the distortion is less than 3.2%. A depth imaging system that can be applied to infrared auxiliary lighting to achieve friendly and easy-to-use natural human-computer interaction.

Description

technical field [0001] The invention relates to an imaging objective lens suitable for RGB-D cameras, which is suitable for the fields of depth imaging and human-computer interaction. Background technique [0002] With the continuous popularization and development of computer technology, friendly and easy-to-use natural human-computer interaction will become a major trend in the development of human-computer interaction. Depth imaging technology, as an important input technology in natural human-computer interaction technology, makes non-contact gesture and gesture interaction possible. The RGB-D camera is the key device for depth imaging. The system uses it to obtain the three-dimensional depth information of the scene. Therefore, its imaging quality directly affects the accuracy and resolution of depth imaging, which in turn affects the human-computer interaction experience. [0003] Existing imaging lenses only optimize image quality for the visible light region, and per...

AI Technical Summary

Problems solved by technology

RGB-D camera is the key equipment for depth imaging, the system uses it to obtain the three-dimensional depth information of the scene, so its imaging quality directly affects the accuracy and resolution of depth imaging, and then affects the human-computer interaction experience

[0003] Existing imaging lenses only optimize image quality for the visible light region, and perform poorly in the near-infrared region. It is necessary to add an infrared cut filter in front of the image sensor to eliminate the influence of infrared light

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