Method for manufacturing spliced large-caliber photon sieve

Abstract

The invention belongs to the optical field, solves a technical problem of reduction of the resolution of a photon sieve after splicing due to a large-caliber photon screen splicing error and disclosesa method for manufacturing a spliced large-caliber photon sieve. The method comprises steps that position distribution of photon sieve holes and the size of the sieve holes are determined according to parameters such as the caliber of the photon sieve and the working wavelength, and position distribution of the photon sieve holes is phase-encoded; the designed large-caliber photon sieve is divided into several sub-intervals; each sub-interval is processed separately; the sub-intervals are spliced into a complete photon sieve; the digital image restoration technology is utilized to restore anobject through images formed by the photon sieve. The method is advantaged in that the large-sized photon sieve can be manufactured, the wavefront coding technology is utilized to reduce adjustment accuracy of the photon sieve during splicing, and imaging quality of the completed spliced photon sieve is further guaranteed.

Description

technical field [0001] The invention belongs to the field of optics, and in particular relates to a photonic sieve, in particular to a manufacturing method of a large-area spliced ​​photonic sieve. Background technique [0002] Photon sieve is a new type of diffractive optical element proposed by Kipp in 2001, which has diffractive optical properties similar to Fresnel zone plates. The photon sieve, like the Fresnel zone plate, transmits light to the odd or even Fresnel band, while making the adjacent bands opaque. The photonic sieve designs the light-transmitting wavelength band into light-transmitting micropores. These micropores are located on the wavelength band. The difference between the distance of the light wave passing through the center of each micropore to the focus and the distance reaching the focus through the optical axis is an integer multiple of the wavelength. So focusing and imaging can be achieved. Photonic sieves have the characteristics of light weigh...

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