Freeform Optical Surfaces: A Revolution in Imaging Optical Design

Thompson, Kevin P.; Rolland, Jannick P.

doi:10.1364/opn.23.6.000030

Cited by 157 publications

(58 citation statements)

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“…Support is given through grants from the National Science Foundation, the NYSTAR Foundation, the II-VI Foundation, government research labs and industry. As part of a growing interest in freeform optics [77], Prof. Rolland is currently the director of a planned NSF Center for Freeform Optics, collaboration between UoR and the University of North Carolina Charlotte.…”

Section: (D) the Optical Diagnostics And Applications Lab (Odalab)mentioning

confidence: 99%

Towards a research pole in photonics in Western Romania

et al. 2014

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We present our efforts in establishing a Research Pole in Photonics in the future Arad-Timisoara metropolitan area projected to unite two major cities of Western Romania. Research objectives and related training activities of various institutions and groups that are involved are presented in their evolution during the last decade. The multi-disciplinary consortium consists principally of two universities, UAVA (Aurel Vlaicu University of Arad) and UMF (Victor Babes Medicine and Pharmacy University of Timisoara), but also of the Arad County Emergency University Hospital and several innovative SMEs, such as Bioclinica S.A. (the largest array of medical analysis labs in the region) and Inteliform S.R.L. (a competitive SME focused on mechatronics and mechanical engineering). A brief survey of the individual and joint projects of these institutions is presented, together with their teaching activities at graduate and undergraduate level. The research Pole collaborates in R&D, training and education in biomedical imaging with universities in USA and Europe. Collaborative activities, mainly on Optical Coherence Tomography (OCT) projects are presented in a multidisciplinary approach that includes optomechatronics, precision mechanics and optics, dentistry, medicine, and biology.

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Section: (D) the Optical Diagnostics And Applications Lab (Odalab)mentioning

confidence: 99%

Towards a research pole in photonics in Western Romania

et al. 2014

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“…This is the case for aspheric and free-form lenses, Fresnel optics, micro-optical arrays [1], etc… There are numerous non-contact optical methods to determine the topography of surfaces. Most of them use the reflection of light on the measured surface and they are mainly based on interferometry [2][3][4], confocal profilometry [5][6] and structured light projection and triangulation techniques [7][8].…”

Section: Introductionmentioning

confidence: 99%

3D-form metrology of arbitrary optical surfaces by absorption in fluids

2013

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We present an imaging technique for the 3D-form metrology of optical surfaces. It is based on the optical absorption in fluids situated between the surface and a reference. An improved setup with a bi-chromatic light source is fundamental to obtain reliable topographic maps. It is able to measure any surface finish (rough or polished), form and slope and independently of scale. We present results focused on flat and spherical optical surfaces, arrays of lenses and with different surface finish (rough-polished). We achieve form accuracies from several nanometers to sub-lambda for sag departures from tens to hundred of microns. Therefore, it seems suitable for the quality control in the production of precision aspheric, freeform lenses and other complex shapes on transparent substrates, independently of the surface finish.

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“…Profilometry of optical surfaces is of increasing importance and difficulty as optical devices expand its applications and surface topologies are more complex, like in Fresnel optics, micro-optical arrays, free-form lenses [1], etc… There are numerous non-contact optical methods to determine the topography of surfaces. Most of them use the reflection of light on the surface to be measured and they are mainly based on interferometry [2][3][4], confocal profilometry [5,6] and structured light projection and triangulation techniques [7,8].…”

Section: Introductionmentioning

confidence: 99%

Topographic optical profilometry by absorption in liquids

Antón¹,

Alonso²,

Pedrero³

et al. 2012

Opt. Express

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Optical absorbance within a liquid is used as a photometric probe to measure the topography of optical surfaces relative to a reference. The liquid fills the gap between the reference surface and the measuring surface. By comparing two transmission images at different wavelengths we can profile the height distribution in a simple and reliable way. The presented method handles steep surface slopes (<90°) without difficulty. It adapts well to any field of view and height range (peak to valley). A height resolution in the order of the nanometer may be achieved and the height range can be tailored by adapting the concentration of water soluble dyes. It is especially appropriate for 3D profiling of transparent complex optical surfaces, like those found in micro-optic arrays and for Fresnel, aspheric or free-form lenses, which are very difficult to measure by other optical methods. We show some experimental results to validate its capabilities as a metrological tool and handling of steep surface slopes. Res. 9(3), 428-433 (1955). 11. M. Csete and Z. Bor, "Plano-concave microcuvette for measuring the absorption coefficient of highly absorbing liquids," Appl. Opt. 36(10), 2133-2138 (1997). 12. J. Johnson and T. Harris, "Full-field optical thickness profilometry of semitransparent thin films with transmission densitometry," Appl. Opt. 49(15), 2920-2928 (2010). 13. S. Ogilvie, E. Isakov, C. Taylor, and P. Glover, "A new high resolution optical method for obtaining the topography of fracture surfaces in rocks," Image Anal. Stereol. 21(1), 61-66 (2002). 14. E. Isakov, S. R. Ogilvie, C. W. Taylor, and P. W. J. Glover, "Fluid flow through rough fractures in rocks 1: high resolution aperture determinations," Earth Planet. Sci. Lett. 191(3-4), 267-282 (2001

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Freeform Optical Surfaces: A Revolution in Imaging Optical Design

Cited by 157 publications

References 0 publications

Towards a research pole in photonics in Western Romania

Towards a research pole in photonics in Western Romania

3D-form metrology of arbitrary optical surfaces by absorption in fluids

Topographic optical profilometry by absorption in liquids

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