Zobrazeno 1 - 10
of 148
pro vyhledávání: '"John C. Lambropoulos"'
We present a new, to the best of our knowledge, experimental method for assessing sub-micron level subsurface damage (SSD) on optical glass. The method correlates surface characteristics such as the fracture toughness and Young’s modulus via nanoin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4773425db0a3a84cca2e4bd9c0a28bda
https://doi.org/10.1364/opticaopen.22114580
https://doi.org/10.1364/opticaopen.22114580
Autor:
Marcela Mireles, Brittany N. Hoffman, Sara MacNally, Christopher C. Smith, Sanjay N. Lakshmanan, John C. Lambropoulos, Amy L. Rigatti, Stavros G. Demos
Publikováno v:
Optica. 10:657
The development of optics that provide spatial control of birefringence could enable better control of laser beam polarization, but available solutions are limited. Here we demonstrate a method to locally modify the birefringence of wave plates fabri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bdac9f686ca6192904f1c31cf1b5505a
https://doi.org/10.1364/optica.487263
https://doi.org/10.1364/optica.487263
Publikováno v:
Applied Optics. 62:3788
This paper is the second part of a study of the grinding of three different grades of silicon carbide (SiC) under the same conditions. In this paper, subsurface damage is analyzed using magnetorheological finishing (MRF). The MRF ribbon is brought in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be0989b9626661e7e69704eab69b81d2
https://doi.org/10.1364/ao.485978
https://doi.org/10.1364/ao.485978
Publikováno v:
Applied optics. 60(6)
Grinding or finishing of thin curved optics introduces surface-localized stresses that may result in bending deformations, thus affecting optical performance (Twyman effect). The Twyman effect depends on local thickness of the optic as well as its cu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cff933a9614af24ccc4d78ad790b0b96
https://pubmed.ncbi.nlm.nih.gov/33690519
https://pubmed.ncbi.nlm.nih.gov/33690519
Publikováno v:
OSA Optical Design and Fabrication 2021 (Flat Optics, Freeform, IODC, OFT).
We use numerical simulations and analytical techniques to assess the role of local thickness nonuniformity and curvature in the Twyman effect. A flat optic of similar thickness is used as a convenient metric for comparison.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4bc77cef833bd609b306b20d77b82e1
https://doi.org/10.1364/oft.2021.oth3b.4
https://doi.org/10.1364/oft.2021.oth3b.4
Publikováno v:
Applied Optics. 61:4579
This paper presents a study of the grinding of three different grades of silicon carbide (SiC) under the same conditions. Surface topography is analyzed using coherent scanning interferometry and scanning electron microscopy. The study provides a bas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed165bffedd2d34af1f79f627f33e4b1
https://doi.org/10.1364/ao.455863
https://doi.org/10.1364/ao.455863
Autor:
Jannick P. Rolland, Andres Garcia Coleto, Benjamin Moon, Zhenkun Wen, Michael Pomerantz, John C. Lambropoulos, Jonathan C. Papa, Di Xu
Publikováno v:
Interferometry XX.
Surface form metrology for freeform optical components is a significant challenge that impacts the entire process chain. One of the main aims is that the metrology technique provides sufficiently low measurement uncertainty within a reasonable measur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ff3dca51402651dcbcbdf44eacc493c
https://doi.org/10.1117/12.2567080
https://doi.org/10.1117/12.2567080
Autor:
Haojie Huang, T. Z. Kosc, A. A. Kozlov, T. J. Kessler, Kyle Kafka, John C. Lambropoulos, James B. Oliver, Nannan Liu, Alexander A. Shestopalov, Amy L. Rigatti, Stavros G. Demos, Brittany N. Hoffman, R. Dent
Publikováno v:
Laser Congress 2020 (ASSL, LAC).
Laser-induced damage remains a key limiting factor for laser system performance. This presentation will review three main issues associated with laser-induced damage: (1) The processes involved leading to material modification, (2) the damage-initiat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cba88a26261acb0933243f3c1e463e34
https://doi.org/10.1364/lac.2020.lth5b.1
https://doi.org/10.1364/lac.2020.lth5b.1
Publikováno v:
Optifab 2019.
We present a new experimental method for measuring subsurface damage (SSD) on ground surfaces of single crystal germanium and borosilicate glass BK-7 based on the morphology and mechanical properties dependence on depth into the material. The materia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cdf7e7fc83cc102f8df15df0d1d96b7
https://doi.org/10.1117/12.2536691
https://doi.org/10.1117/12.2536691
Publikováno v:
Optifab 2019.
An OptiPro UltraForm Finisher 300 (UFF) was used to produce removal spots on Fused Silica ground surfaces. The goal of this research was to assess the relationship between Belt Compression (μm) and Material Removal Rate (mm3/min) for compressions ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3296f4c0b5ad8874afb7244328643fcd
https://doi.org/10.1117/12.2536595
https://doi.org/10.1117/12.2536595