Diffractive optical system design by cascaded propagation
- URL: http://arxiv.org/abs/2202.11535v1
- Date: Wed, 23 Feb 2022 14:21:09 GMT
- Title: Diffractive optical system design by cascaded propagation
- Authors: Boris Ferdman, Alon Saguy, Onit Alalouf, Yoav Shechtman
- Abstract summary: Fourier optics is typically used for designing thin elements, placed in the system's aperture, generating a shift-invariant Point Spread Function (PSF)
We propose and implement an efficient and differentiable propagation model based on the Collins integral, which enables the optimization of diffraction optical systems with unprecedented design freedom using backpropagation.
We demonstrate the applicability of our method, numerically and experimentally, by engineering shift-variant PSFs via thin plate elements placed in arbitrary planes inside complex imaging systems.
- Score: 1.6385815610837167
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Modern design of complex optical systems relies heavily on computational
tools. These typically utilize geometrical optics as well as Fourier optics,
which enables the use of diffractive elements to manipulate light with features
on the scale of a wavelength. Fourier optics is typically used for designing
thin elements, placed in the system's aperture, generating a shift-invariant
Point Spread Function (PSF). A major bottleneck in applying Fourier Optics in
many cases of interest, e.g. when dealing with multiple, or out-of-aperture
elements, comes from numerical complexity. In this work, we propose and
implement an efficient and differentiable propagation model based on the
Collins integral, which enables the optimization of diffraction optical systems
with unprecedented design freedom using backpropagation. We demonstrate the
applicability of our method, numerically and experimentally, by engineering
shift-variant PSFs via thin plate elements placed in arbitrary planes inside
complex imaging systems, performing cascaded optimization of multiple planes,
and designing optimal machine-vision systems by deep learning.
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