Ultra Slim Optical Zoom System Using Alvarez Freeform Lenses

Hou, Cong-Cong; Ren, Yize; Tan, Yufan; Xin, Qingming; Zang, Yue

doi:10.1109/jphot.2019.2957049

Cited by 17 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our case the hyper-focal distance is indeed 3.21 m with the closest object distance at 1.6 m. Then the MTF does not change significantly between one meter and infinity. Alvarez lenses with the 6th first polynomial order have been optimised to correct aberrations (order already used to manufactured an Alvarez zoom system [8]).…”

Section: Simulation Resultsmentioning

confidence: 99%

Wide field of view compact lens with variable focus based on Alvarez lens

Maurey,

Twardowski,

Pierron

et al. 2024

Optics, Photonics, and Digital Technologies for Imaging Applications VIII

View full text Add to dashboard Cite

Compact wide-angle lenses with adjustable focus have a broad range of applications in emerging technologies. The standard approach to designing lenses with variable focal length is to move a group of lenses along the optical axis. These systems are often bulky due to the need for displacements of a few millimeters or centimeters. To create a compact wide angle lens with a variable focal length, we propose a system including Alvarez and aspherical lenses. The complete system is 18mm long, has a cutoff frequency over 223 lp/mm considering three wavelengths in the visible range: 486, 588, 656 nm, low vignetting, 87.5 • FOV, object distance range from 25 cm to infinity.

show abstract

Section: Simulation Resultsmentioning

confidence: 99%

Wide field of view compact lens with variable focus based on Alvarez lens

Maurey,

Twardowski,

Pierron

et al. 2024

Optics, Photonics, and Digital Technologies for Imaging Applications VIII

View full text Add to dashboard Cite

show abstract

“…Furthermore, ultraprecision diamond turning has significantly impacted aerospace and automotive applications by enabling the production of precision mechanical parts for aerospace components (Sharma et al, 2017;Balogun et al, 2024). In the automotive sector, the technique has been instrumental in the creation of optical elements for automotive sensors and lighting systems, showcasing its versatility and relevance in diverse industrial applications (Hou et al, 2019). In conclusion, ultraprecision diamond turning has demonstrated its significance in various fields, ranging from optics manufacturing to biomedical engineering and aerospace and automotive applications.…”

Section: Applications Of Ultraprecision Diamond Turningmentioning

confidence: 99%

Advances in Ultraprecision Diamond Turning: Techniques, Applications, and Future Trends

Adeniyi Kehinde Adeleke,

Danny Jose Portillo Montero,

Emmanuel Chigozie Ani

et al. 2024

Eng. sci. technol. j.

View full text Add to dashboard Cite

Advances in ultraprecision diamond turning have revolutionized manufacturing processes across various industries, offering unparalleled precision and surface quality in the fabrication of optical components, microfluidic devices, and advanced mechanical parts. This review delves into the techniques, applications, and future trends in ultraprecision diamond turning, highlighting recent advancements and potential trajectories. Techniques in ultraprecision diamond turning have evolved significantly, driven by innovations in machine design, tooling materials, and control systems. Diamond turning machines equipped with ultra-stiff structures, high-speed spindles, and advanced feedback mechanisms enable sub-nanometer level accuracy and surface finishes down to Angstrom levels. Additionally, advancements in single-point diamond turning (SPDT), fast tool servo (FTS), and deterministic microgrinding (DMG) techniques further enhance the versatility and precision of the process. Applications of ultraprecision diamond turning span a wide range of industries, including aerospace, automotive, biomedical, and telecommunications. In optics manufacturing, diamond turning facilitates the production of aspheric lenses, freeform optics, and diffractive optical elements with unprecedented accuracy, contributing to the development of high-performance imaging systems and laser applications. Moreover, in the biomedical field, diamond-turned microfluidic devices enable precise control over fluid flow and particle manipulation, empowering advancements in drug delivery systems and lab-on-a-chip technologies. Future trends in ultraprecision diamond turning are poised to address challenges related to scalability, multi-material processing, and in-situ metrology. Integration of adaptive control algorithms and machine learning techniques promises enhanced process stability and predictive maintenance, optimizing productivity and reducing downtime. Furthermore, the development of hybrid manufacturing approaches, combining diamond turning with additive manufacturing or laser processing, offers novel avenues for fabricating complex, multi-functional components with improved efficiency and cost-effectiveness. The ongoing advancements in ultraprecision diamond turning techniques, coupled with diverse applications across industries, underscore its pivotal role in advancing manufacturing capabilities. Anticipated future trends hold promise for further expanding the scope and impact of this technology, driving innovation and pushing the boundaries of precision engineering. Keywords: Ultraprecision, Diamond, Turning, Technique, Review.

show abstract