Journal Article10.1364/AO.36.004635
Blazed diffractive optics.
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TL;DR: This work reviews several methods for making elements other than those with approximate, stepped surfaces, such as binary optical elements, and offers an expression relating the maximum numerical aperture of a diffractive lens with a given maximum efficiency to the numericalperture of the recording system.
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Abstract: Diffractive optical elements with blazed profiles can, in theory, have 100% relative efficiency We review several methods for making such elements and compare their advantages and limitations Our emphasis is on processes to produce elements other than those with approximate, stepped surfaces, such as binary optical elements For optical methods, we offer an expression relating the maximum numerical aperture of a diffractive lens with a given maximum efficiency to the numerical aperture of the recording system
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Citations
Imaging with flat optics: metalenses or diffractive lenses?
Sourangsu Banerji,Monjurul Meem,Apratim Majumder,Fernando Guevara Vasquez,Berardi Sensale-Rodriguez,Rajesh Menon +5 more
- 20 Jun 2019
TL;DR: In this article, multilevel diffractive lenses (MDLs) were designed and fabricated with larger constituent features, making them accessible to low-cost, large-area volume manufacturing, which is difficult for metalenses.
292
Polar coordinate laser pattern generator for fabrication of diffractive optical elements with arbitrary structure
Alexander G. Poleshchuk,Evgeny G. Churin,Voldemar Petrovich Koronkevich,Victor P. Korolkov,Andrei A. Kharissov,Vadim V. Cherkashin,Valerii P. Kiryanov,Aleksei V. Kiryanov,Sergei A. Kokarev,Alexander G. Verhoglyad +9 more
TL;DR: A precision laser pattern generator for writing arbitrary diffractive elements was developed and two resistless technologies of writing on chromium and on amorphous silicon films were developed and implemented and limit characteristics were investigated by writing special test structures.
195
Replicated slanted gratings with a high refractive index material for in and outcoupling of light
Tapani Levola,Pasi Laakkonen +1 more
TL;DR: It is shown that it is possible to control which outcoupling diffraction order, reflective or transmissive, is dominating and hence to maximize the light power to one direction.
187
Design concepts for broadband high-efficiency DOEs
TL;DR: In this paper, several design concepts are presented for efficiency achromatized diffractive optical elements (EA-DOEs) possessing diffraction efficiency larger than 97% over a broad spectral range.
Analysis and optimization of fabrication of continuous-relief diffractive optical elements
TL;DR: The fabrication of continuous-relief diffractive optical elements by direct laser beam writing in photoresist is analyzed, and the main limitation and tolerances are identified, and their influence on optical performance is quantified.
86
References
Patent
Multi-focal diffractive ophthalmic lenses
John A Futhey,Michael J Simpson +1 more
- 31 Mar 1989
TL;DR: In this paper, a lens according to the invention has diffractive power and two primary foci, where one focus is associated with the first diffractive order and one with the second order.
258
Limits of scalar diffraction theory for diffractive phase elements
TL;DR: In this paper, the authors evaluated the accuracy of scalar diffraction theory for periodic diffractive phase elements (DPE) by a comparison of diffraction efficiencies predicted from scalar theory to exact results calculated with a rigorous electromagnetic theory.
177
Production of blazed holograms
TL;DR: The concept of the blazed hologram as a special case of the Denisyuk hologram is discussed in this paper, and the experimental production of blazed diffraction gratings has been described with 73% of the diffracted light concentrated in one first order maximum.
106
Gray-scale masks for diffractive-optics fabrication: II. Spatially filtered halftone screens.
TL;DR: This work reports on an alternative technique for producing gray-scale masks by spatial filtering of halftone screens using the photoreduced gray- scale patterns as lithographic masks and fabricated diffractiveoptic blazed gratings and lens arrays in both photoresist and quartz.
95
Excimer laser micromachining for rapid fabrication of diffractive optical elements
TL;DR: This work demonstrates the fabrication of binary, multilevel, and blazed diffractive structures by a fast and flexible direct-write process by using an excimer-laser-based tabletop micromachining workstation with an integrated optical surface profiler.
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