Super-large depth-of-field imaging system based on wavefront coding

A wavefront coding and imaging system technology, applied in the optical field, can solve problems such as increasing the difficulty of optical system design and optimization, and achieve the effect of clear imaging

Pending Publication Date: 2018-05-29
西安博雅精密光学科技有限公司
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Problems solved by technology

[0012] The increase in relative aperture and field of view will greatly increase the difficulty of designing and optimizing the optical system. Traditional de

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  • Super-large depth-of-field imaging system based on wavefront coding
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  • Super-large depth-of-field imaging system based on wavefront coding

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[0040] See figure 1 as well as figure 2 , The present invention provides an imaging system based on wavefront coding with an ultra-large depth of field, which can simultaneously achieve a large relative aperture, an ultra-large depth of field and a larger field of view, including a wavefront encoding imaging lens, a 1 / 1.8-inch image detector, and a decoding processing unit The wavefront encoding imaging lens includes a first lens 21, a second lens 22, a phase mask 23, a third lens 24, a fourth lens 25, and a fifth lens 26; the first lens 21, the second lens 22, and the phase mask The diaphragm 23, the third lens 24, the fourth lens 25, the fifth lens 26, and the 1 / 1.8-inch image detector are sequentially arranged on the same optical path; the wavefront encoding imaging system adopts an asymmetric double Gaussian structure with a circular aperture , Where the radius of curvature of the front and rear surfaces of the first lens 21 and the radius of curvature of the front and rear...

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Abstract

The invention belongs to the optical field and relates to a super-large depth-of-field imaging system based on wavefront coding. The system comprises a wavefront coding imaging lens, a 1/1.8 inch image detector and a decoding processing unit. The wavefront coding imaging lens comprises a first lens, a second lens, a phase masking plate, a third lens, a fourth lens and a fifth lens. The first lens,the second lens, the phase masking plate, the third lens, the fourth lens, the fifth lens, the 1/1.8 inch image detector and the decoding processing unit are successively arranged on a same optical path. Simultaneously, parameters of the wavefront coding imaging lens, and especially the first lens, the second lens, the phase masking plate, the third lens, the fourth lens and the fifth lens are limited. The super-large depth-of-field imaging system based on wavefront coding provided in the invention can be used to simultaneously realize a large relative aperture, a super-large depth of field and a large field of view.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a depth-of-field imaging system, in particular to a super-large depth-of-field imaging system based on wavefront coding. Background technique [0002] Extending the depth of field of optical imaging systems has always been a hotspot in academic research. Since the mid-1980s, although various methods have been proposed for depth of field expansion, it was not until Dr. Dowski and Professor Cathey of the University of Colorado in the United States proposed in 1995 After the concept of wavefront coding, there was a real breakthrough in the extension of depth of field. [0003] Taking a one-dimensional optical system as an example, its OTF (Optical Transfer Function) can be obtained through the autocorrelation operation of the generalized pupil function, as follows: [0004] [0005] Among them, u and x are the normalized spatial frequency and the transverse coordinates of the aperture plane,...

Claims

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Application Information

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IPC IPC(8): G02B27/00
CPCG02B27/0012G02B27/0075
Inventor 宫杰
Owner 西安博雅精密光学科技有限公司
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