Water-air dual-purpose panoramic lens

Abstract

The invention provides a water and air dual-purpose panoramic lens which can capture high-quality panoramic images in air and underwater environments. Through an optical design method, the panoramic lens with the field angle exceeding 180 degrees in the air environment and the underwater environment is designed by adopting a full spherical surface, and the panoramic lens has high imaging resolution in both the air environment and the underwater environment. According to the invention, the spherical design of 10 pieces of glass is adopted, the F number is 2, the angle of view in the air and underwater environment exceeds 180 degrees, the angle of view in the air can reach 200-240 degrees, and the angle of view in the underwater environment can reach 180-210 degrees. The designed lens is good in MTF in the full view field range of two environments, the MTF at the position of 400 lp / mm is higher than 0.1, the resolution ratio is high, and high-quality panoramic images can be captured in diversified environments. The designed panoramic lens can meet diversified use requirements of users, and is simple to process and low in manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of optical design, in particular to a water-air dual-purpose panoramic lens. Background technique [0002] Traditional camera lenses have limited spatial bandwidth products, and the field of view is usually less than 180°, which can only capture part of the target scene in the surrounding environment. In order to capture the surrounding environment as a whole, the design of 360° panoramic imaging system has become a hot research topic. Panoramic lens is the core component of panoramic imaging technology, which can capture a hemispherical field of view greater than 180° in vertical and horizontal directions at one time. [0003] A panoramic imaging lens is proposed in the document "Design and assessment of a 360°panoramic and high-performance capture system with two tiled catadioptric imaging channels, Applied Optics, 2018." The lens structure is as follows figure 1 shown. The panoramic lens includes seven...

AI Technical Summary

Problems solved by technology

The panoramic lens only guarantees a field of view greater than 180° in the air, while the refractive index of water is greater than that of air, and the underwater field of view cannot be guaranteed to reach 180°

Although a certain number of aspheric surfaces are used to correct aberrations to improve the imaging resolution of the panoramic lens in the air, it is expensive and expensive

And in the design process, only the imaging resolution in the air was considered, and the underwater imaging resolution of the lens was not optimized, so it was impossible to capture high-quality panoramic images underwater

[0004] In summary, the existing panoramic lens only has a field of view of 180° in the air, and the refractive index of water is greater than that of air, so the underwater field of view of the lens cannot reach 180°, that is, it cannot realize panoramic imaging underwater

In addition, the existing panoramic lens only considers the imaging resolution in the air during the design process, without optimizing the underwater imaging resolution of the lens, it is impossible to capture high-quality panoramic images underwater

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