Abstract
A more computationally tractable method to design a multiplexed phase diffractive optical element with optical design software to extend the depth of focus is proposed, through which the intensity distribution of the output beams can also be controlled with great flexibility. The design principle is explained in detail. And the feasibility of this design method is illustrated through a design example followed by computer simulation verification.
Highlights
Diffractive optical elements(DOEs) have been used to extend the depth of focus, such as nonuniform transmission filters [1], Fresnel zone pupil masks [2], hybrid refractive diffractive optical systems [3] and multiplexed phase diffractive optical elements(MPDOEs) [4,5]
The conventional way to design such long-focus-depth DOEs is to use various numerical optimization algorithms such as simulated annealing [6] or iterative gradient approaches [7,8]. These methods have all suffered from one significant deficiency: these optimization approaches are computer intensive and not intuitive, which makes the design of DOEs very complex and not compatible with the commercial optical design software packages such as ZEMAX, CODE-V
In this paper we propose a more computationally tractable method to design multiplexed phase diffractive optical elements with optical design software to extend the depth of focus
Summary
Diffractive optical elements(DOEs) have been used to extend the depth of focus, such as nonuniform transmission filters [1], Fresnel zone pupil masks [2], hybrid refractive diffractive optical systems [3] and multiplexed phase diffractive optical elements(MPDOEs) [4,5]. The conventional way to design such long-focus-depth DOEs is to use various numerical optimization algorithms such as simulated annealing [6] or iterative gradient approaches [7,8]. These methods have all suffered from one significant deficiency: these optimization approaches are computer intensive and not intuitive, which makes the design of DOEs very complex and not compatible with the commercial optical design software packages such as ZEMAX, CODE-V.
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