Optimal interface surface determination for multi-axis freeform surface machining with both roughing and finishing
Sign Up to like & getrecommendations! Published in 2017 at "Chinese Journal of Aeronautics"
DOI: 10.1016/j.cja.2017.07.004
Abstract: Abstract In the current practice of multi-axis machining of freeform surfaces, the interface surface between the roughing and finishing process is simply an offset surface of the nominal surface. While there have already been attempts… read more here.
Keywords: freeform; surface; multi axis; roughing finishing ... See more keywords
Multiwavelength Achromatic Deflector in the Visible Using a Single-Layer Freeform Metasurface
Sign Up to like & getrecommendations! Published in 2024 at "Nano Letters"
DOI: 10.1021/acs.nanolett.4c02995
Abstract: Deflectors are essential for modulating beam direction in optical systems but often face form factor issues or chromatic aberration with conventional optical elements, such as prisms, mirrors, and diffractive/holographic optical elements. Despite recent efforts to… read more here.
Keywords: layer; single layer; multiwavelength achromatic; freeform ... See more keywords
Programmed multimaterial assembly by synergized 3D printing and freeform laser induction
Sign Up to like & getrecommendations! Published in 2024 at "Nature Communications"
DOI: 10.1038/s41467-024-48919-5
Abstract: In nature, structural and functional materials often form programmed three-dimensional (3D) assembly to perform daily functions, inspiring researchers to engineer multifunctional 3D structures. Despite much progress, a general method to fabricate and assemble a broad… read more here.
Keywords: freeform; laser induction; freeform laser; multimaterial assembly ... See more keywords
Metasurface Freeform Nanophotonics
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-01908-9
Abstract: Freeform optics aims to expand the toolkit of optical elements by allowing for more complex phase geometries beyond rotational symmetry. Complex, asymmetric curvatures are employed to enhance the performance of optical components while minimizing their… read more here.
Keywords: freeform optics; freeform; optics; metasurface freeform ... See more keywords
Freeform Assembly Planning
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Automation Science and Engineering"
DOI: 10.1109/tase.2018.2878670
Abstract: 3-D printing enables the fabrication of complex architectures at multiple length scales by automating large sequences of additive steps. The increasing sophistication of printers, materials, and generative design promise to make geometric complexity a nonissue… read more here.
Keywords: printing; freeform assembly; freeform; problem ... See more keywords
Utilizing freeform optics in dynamic optical configuration designs
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Astronomical Telescopes, Instruments, and Systems"
DOI: 10.1117/1.jatis.5.3.035005
Abstract: Abstract. A linear field of view (FOV) K-mirror system used for image derotation is presented as a case example for how to leverage freeform surfaces in dynamic optical configuration design. As the K-mirror rotates about… read more here.
Keywords: mirror; freeform; dynamic optical; freeform optics ... See more keywords
Design and modeling of spectrographs with holographic gratings on freeform surfaces
Sign Up to like & getrecommendations! Published in 2018 at "Optical Engineering"
DOI: 10.1117/1.oe.57.12.125105
Abstract: Abstract. We demonstrate the approach of using a holographic grating on a freeform surface for advanced spectrographs design. We discuss the surface and groove pattern description used for ray tracing. Moreover, we present a general… read more here.
Keywords: spectrographs holographic; modeling spectrographs; freeform; holographic gratings ... See more keywords
Compensation for general asymmetric static loads for a complete optical system of freeform mirrors.
Sign Up to like & getrecommendations! Published in 2020 at "Applied optics"
DOI: 10.1364/ao.376214
Abstract: Optical systems consisting of freeform metal mirrors are state of the art in optical engineering. The freeform shapes allow for more compact designs and offer more degrees of freedom for aberration correction. The metal components… read more here.
Keywords: system; freeform; static loads; optical system ... See more keywords
Ultra-precision turning method efficient for optical freeform surfaces with a hybrid slow-fast tool servo.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.448009
Abstract: The machining of freeform surfaces is a current research hotspot: A slow tool servo (STS) has limitations in machining accuracy and efficiency for large steep freeform surfaces. Most fast tool servo (FTS) tools are limited… read more here.
Keywords: tool servo; fast tool; freeform surfaces; freeform ... See more keywords
Design of dual-zone freeform holographic optical elements.
Sign Up to like & getrecommendations! Published in 2025 at "Applied optics"
DOI: 10.1364/ao.569160
Abstract: Freeform holographic optical elements (HOEs), which combine the merits of HOEs and freeform surfaces, can provide high degrees of freedom for aberration correction. To achieve flexible phase modulation, the representation of the flexible phase profiles… read more here.
Keywords: holographic optical; freeform holographic; zone freeform; dual zone ... See more keywords
Two-step carrier-wave stitching method for aspheric and freeform surface measurement with a standard spherical interferometer.
Sign Up to like & getrecommendations! Published in 2018 at "Applied optics"
DOI: 10.1364/ao.57.004743
Abstract: Measurement of aspheric and freeform surfaces remains challenging due to the various shapes of the surface under test (SUT), especially when the SUT has a large aperture and strong deviation from the spherical surface. This… read more here.
Keywords: aspheric freeform; freeform; carrier wave; two step ... See more keywords