Slab lens for air imaging and air imaging system

Abstract

The invention discloses a slab lens for air imaging, comprising a first optical waveguide lens array and a second optical waveguide lens array arranged in parallel, wherein each optical waveguide lensarray comprises a plurality of reflective lenses arranged in parallel, the reflective lenses in the first optical waveguide lens array is orthogonal to the reflective lenses in the second optical waveguide lens array, and the widths of the reflective lenses are reduced from the center to the edge of the optical waveguide lens array. An air imaging system is also disclosed, comprising a light source and a slab lens, wherein the slab lens is any of the above slab lenses for air imaging. The slab lens has the advantages: compared with an ordinary strip reflector, the diffuse spot is smaller after using this solution, so the spherical aberration is smaller, the imaging depth of field is larger, the imaging clarity is effectively improved, this design does not change the size of the original slab lens, and the slab lens can be directly replaced to the original air imaging equipment.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a flat lens for air imaging and an air imaging system. Background technique [0002] The flat plate lens for air imaging generally adopts a strip reflector or a dihedral reflector, and the strip-shaped light-transmitting body is coated with a reflective surface to form a strip-shaped reflector, and several strip-shaped reflectors are spliced ​​side by side to form a light The waveguide lens array, two optical waveguide lens arrays are stacked in an orthogonal manner to form a whole piece of optical imaging element, but in each existing optical waveguide lens array, the width of each strip-shaped reflector is equal, and the light source The distance from the reflective surface to each strip reflector is not equal, and a light spot will be formed after passing through each strip reflector, and all the light spots will be superimposed to form spherical aberration, and the spherical...

AI Technical Summary

Problems solved by technology

[0002] The flat plate lens for air imaging generally adopts a strip reflector or a dihedral reflector, and the strip-shaped light-transmitting body is coated with a reflective surface to form a strip-shaped reflector, and several strip-shaped reflectors are spliced ​​side by side to form a light The waveguide lens array, two optical waveguide lens arrays are stacked in an orthogonal manner to form a whole piece of optical imaging element, but in each existing optical waveguide lens array, the width of each strip-shaped reflector is equal, and the light source The distance from the reflective surface to each strip reflector is not equal, and a light spot will be formed after passing through each strip reflector, and all the light spots will be superimposed to form spherical aberration, and the spherical aberration will reduce the depth of field of air imaging, and at the same time It will cause low imaging clarity. In the optical mirror group, the combination of convex lens and concave lens is often used to improve the clarity, but the combination of convex lens and concave lens in the air imaging device will seriously affect the viewing angle of the picture.

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