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检索条件"任意字段=Conference on Current Developments in Lens Design and Optical Engineering III"

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design Efficiency of 3188 optical designs

Design Efficiency of 3188 Optical Designs

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conference on current developments in lens design and optical engineering IX

作者： Cakmakci, Ozan Rolland, Jannick P. Thompson, Kevin P. Rogers, John Univ Cent Florida CREOL Coll Opt & Photon Orlando FL 32816 USA Opt Res Associates Pasadena CA USA

ISBN: (纸本)9780819472809

In this study, we take a data-driven approach to study the design efficiency of a variety of optical designs. Efficiency is defined to be the number of resolvable spots across the image per lens element. 3188 designs were selected from a commercially available lens database. Each design was imported into a raytrace code, briefly optimized, and the number of resolvable spots was computed. Examples of efficient designs within this dataset are shown. Four design efficiency groupings are created and discussed separately: 1) all-spherical, monochromatic designs, 2) monochromatic designs with some aspheres, 3) all-spherical, polychromatic designs, and 4) polychromatic designs with some aspheres. Zoom lens systems were excluded from the dataset. The results of the analysis are intended to answer the question of "how many elements does it take, as a minimum, to deliver a certain number of resolved spots?"

关键词： optical system design efficiency database analysis

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Day and Night Security Camera

Day and Night Security Camera

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conference on current developments in lens design and optical engineering IX

作者： Laikin, Milton Kweon, Gyeong-il Choi, Young-ho Laikin Opt Corp 4314 Marina City Dr 930 Marina Del Rey CA 90292 USA Honam Univ Dept Optoelect Gwangju 506090 South Korea Honam Univ Dept Informat & Commun Engn Gwangju 506090 South Korea

ISBN: (纸本)9780819472809

We have designed a fisheye lens with a field of view of 190 degrees and F# of 2.8 The diameter of the circular image plane is designed to fit within the width of the image sensor plane, so that a 190 degrees horizontal field of view can be obtained. It is composed of 8 spherical lens elements and the overall length is 35mm from the first lens surface to the image sensor plane. This fisheye lens operates simultaneously in the visible and the near infrared wavelength regions.

关键词： lens design near infrared visual wide-angle lens

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Automated design and fabrication of ocular optics

Automated design and fabrication of ocular optics

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conference on current developments in lens design and optical engineering IX

作者： Gutin, Mikhail Gutin, Olga Appl Sci Innovat Inc Troy NY 12180 USA

ISBN: (纸本)9780819472809

Automated computer-aided procedure for component selection, optical design, and optimization was developed and used to produce prototype ocular optics of a head-mounted display for biomedical imaging, with the field of view and resolution approaching those of normal human vision. The new display has the potential to dramatically increase the amount and fidelity of real-time visual information presented to the user. The selected approach was based on a tiled configuration and "optically stitched" virtual image, resulting in seamless imagery generated by multiple micro-displays. Several optical configurations were studied in the design stage, to arrive at the optimal optical layout. The automated procedure provided for extensive search of the best candidate stock components out of thousands of candidate lenses offered by different vendors. At each iteration, the candidate lens was "digitally inserted" in the optical layout, its position was optimized, and the achieved merit function characterizing the quality of the stitched image was stored, along with the design prescription. A few best designs were then closely evaluated in a traditional "manual" procedure. The design effort was followed by experimental demonstration and tests of a limited prototype optical system.

关键词： optical design lens design head mounted display HMD

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lens technology incorporating internal pan/tilt and zoom

Lens technology incorporating internal pan/tilt and zoom

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conference on optical design and engineering iii

作者： Rana, Harbinder S. Ft Halstead Def Sci & Technol Lab Sevenoaks TN14 7BP Kent England

ISBN: (纸本)9780819473301

A lens that incorporates an internal optical pan and tilt mechanism using a Risley prism has been designed. A zoom mechanism that provides various ratios up to 10x has also been incorporated. The design of the lens allows any object in the field of view to be brought into the centre of the field and then zoomed onto. The lens design is scalable. The first variant was designed with a focal range of 2-10mm with a pan/tilt of 46 degrees within a field of view of 90 in a pinhole lens configuration. Importantly the lens has ail external stationary entrance pupil that leads to a compact form. A technology demonstrator has been built and its performance is discussed. Further developments of the lens technology are also discussed, including a 120 degrees field of view variant with a 10x zoom.

关键词： Covert surveillance zoom lens pan tilt Risley prism pinhole lens wide area surveillance

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design and fabrication of low-cost thermal imaging optics using precision chalcogenide glass molding

Design and fabrication of low-cost thermal imaging optics us...

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conference on current developments in lens design and optical engineering IX

作者： Curatu, George LightPath Technol Orlando FL 32826 USA

ISBN: (纸本)9780819472809

Aspheric and diffractive surfaces in infrared materials are traditionally fabricated by single point diamond turning, which is a high-cost, low-throughput process, not suitable for low-cost, high-volume applications. Precision molding of chalcogenide glasses is a novel process we developed to allow the efficient fabrication of quality infrared optics in large volumes. In this paper we present the advantages and particularities of designing thermal imaging lenses for high-volume applications using precision molded chalcogenide glasses. As an example, we present a compact 19 mm F/1.1 infrared lens design for a 320 x 240 uncooled detector array operating from 8 to 14 microns. The excellent image quality and transmission of tested prototypes prove that precision molding of chalcogenide glasses is an ideal optical fabrication technology for the high-volume production of infrared optics.

关键词： infrared lens design thermal imaging precision glass molding chalcogenide glasses athermal design diffractive optics

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The design, Construction and Characterization of a Solid Elastic lens

The Design, Construction and Characterization of a Solid Ela...

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conference on current developments in lens design and optical engineering IX

作者： Santiago-Alvarado, A. Vazquez-Montiel, S. Iturbide-Jimenez, F. Arriaga-Martinez, R. Gonzalez-Garcia, J. UTM Inst Fis & Matemat Carretera Acatlima Km 2-5 Huajuapan Leon Oaxaca Mexico City 6900 DF Mexico INAOE Inst Opt Santa Maria Tonantzintla Pu Mexico UTM Inst Diseno Mexico City 6900 DF Mexico

ISBN: (纸本)9780819472809

Recent times have seen the production of normal and micro liquid lenses with variable focal length. These have been specially made with transparent elastic materials and liquid medium between them, or with a dielectric liquid medium inside the cavity. Change in the volume of the liquid medium, in the first case, or the application of an electric field as in the second, produced a change in the optical parameters of the lens. The present study offers the opto-mechanical design, manufacture and characterization of a solid elastic lens made of Polydimethylsiloxane (PDMS). To do so, we have prepared a mechanical support frame to hold all of the components of the lens and also allow for the application of radial stress on its periphery. In order to ensure a well-finished lens surface a high quality optical glass mold has also been constructed. Finally, we will present an analysis of the properties of this type of lens when it undergoes variations of radial stress. The experimental results are presented.

关键词： Adaptive lens Opto-mechanical design Elastic lens

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Five lens corrector for Cassegrain-form telescopes.

Five lens corrector for Cassegrain-form telescopes.

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conference on current developments in lens design and optical engineering IX

作者： Ackenriann, Mark R. McGraw, John T. Zimmer, Peter C. Sandia Natl Labs Livermore CA 94550 USA Univ New Mexico Albuquerque NM 87131 USA

ISBN: (纸本)9780819472809

Refractive elements are commonly used on Cassegrain-form telescopes to correct off-axis aberrations and both widen and flatten the field. Early correctors used two lenses with spherical surfaces, but their performance was somewhat limited. More recent correctors have three or four lenses with some including at least one aspheric surface. These systems produce high resolution images over relatively wide fields but often require the corrector and mirrors to be optimized together. Here we present a new corrector design using five spherical lenses. This approach produces high image quality with low distortion over wide fields and has sufficient degrees of freedom to allow corrector to be optimized independent of the mirrors if necessary.

关键词： Survey telescope wide-field corrector Cassegrain Ritchey-Chretien

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Modeling diffractive optical elements in hybrid systems with the effect of the material dispersion

Modeling diffractive optical elements in hybrid systems with...

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conference on current developments in lens design and optical engineering IX

作者： Zhang, Hu Liu, Hua Lu, Zhenwu Zhang, Hongxin Ni, Zhengguo Chinese Acad Sci State Key Lab Appl Opt Changchun Inst Opt Fine Mech & Phys Changchun 130033 Peoples R China Chinese Acad Sci Grad Sch Beijing 100039 Peoples R China Aviat Univ Air Force Changchun 130022 Peoples R China

ISBN: (纸本)9780819472809

The diffractive optical element (DOE) is always modeled as an ideal pure diffractive clement which neglects the refractive dispersion of the clement's material. In this paper, a new model of the diffractive optical element is proposed, in which the effect of the refractive dispersion of the DOE's material is considered. The new model is explained and compared with standard diffraction-order expansion with the help of a hybrid system example. The analytical results show that the new model has an important meaning for the exact analysis of the hybrid refractive-diffractive optical system.

关键词： Diffractive optical clement material dispersion hybrid optical systems optical design

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design of a discrete scan laser focusing system with a ring grating scan element

Design of a discrete scan laser focusing system with a ring ...

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conference on current developments in lens design and optical engineering IX

作者： Rodgers, J. Michael Opt Res Associates Pasadena CA 91107 USA

ISBN: (纸本)9780819472809

An optical system application required a high speed laser scanning subsystem that produced high quality extended images focused at 32 discrete separated positions along a line, rather than continuously varying positions along the line as in more familiar scanning systems. This paper describes the optical design trades and selection of a grating-based scan element that produces this unusual type of scan, and the optical design methods that corrected aberrations produced by the scan element. A variety of different grating-based scan element designs were explored, in a flat disk geometry, but these produced excessive aberrations, both in the absolute level and in the magnitude of variation with scan. A ring-shaped scan element geometry was identified, which greatly minimized the scan-varying aberrations and brought them to near acceptable levels. Additional cylindrical corrector elements were added near the ring scan element to reduce the astigmatism of the ring substrate, and cylindrical lenslets were placed near the focus to provide further independent correction of astigmatism in each scan position. The resulting design achieved diffraction limited wavefront quality across the scan range.

关键词： optical design gratings scanning systems

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Technological strategy for advanced micro and nano-structured optical elements

Technological strategy for advanced micro and nano-structure...

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conference on optical design and Testing iii

作者： Kikuta, Hisao Osaka Prefecture Univ Sch Engn Naka Ku Osaka 5998531 Japan

ISBN: (纸本)9780819470096

A wide variety of micro and nano-structured optical elements have been developed. Among other things, optical elements with subwavelength structure surfaces are moving on the advanced stage for practical use. A camera lens with antireflective structured surface and an achromatic birefringent wave-plate have been fabricated by plastic molding process. Form-birefringent micro-reader array is used for a polarization imaging camera system. Recent research-and-developments on subwavelength structured optical elements are oriented to practical applications and process technologies for manufacturing. In this paper the current situation of the subwavelength structured optical elements have been summarized and subjects of developments are discussed from the viewpoint of practical applications.

关键词： subwavelength grating optical element nano structure form birefringence artificial refractive index

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