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

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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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Unique aspects of designing & tolerancing an optical testing system

Unique aspects of designing & tolerancing an optical testing...

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conference on current developments in Lens design and optical engineering V

作者： Hadaway, JB Reardon, PJ Univ Alabama Ctr Appl Opt Huntsville AL 35899 USA

ISBN: (纸本)0819454613

The design & tolerancing of an optical testing system (OTS) presents a unique set of challenges not generally encountered during the typical optical design process. The authors have spent the past six years developing and using a series of optical systems designed to measure the surface figure & radius-of-curvature of various ultra-lightweight mirrors at 30 K. These mirrors were part of a technology development program to support NASA's James Webb Space Telescope (JWST). The design of these systems required consideration of the following: (i) potentially large figure errors in the test mirror (due to gravity sag & cryo-distortion), (ii) cryo-shrinkage of the aperture and radius-of-curvature, (iii) figure changes due to the use of mirror actuators, and (iv) vibration between the OTS & the test mirror. In addition, an exhaustive tolerancing process was required for each system in order to reach a set of alignment tolerances that were achievable using the equipment available and within the test environment. The authors found many aspects of the OTS design process to be significantly different from the norm;at the same time, however, viewing the process as a typical optical design problem often-times brought clarification. This paper will describe both the differences and the similarities observed between the design of an OTS as opposed to a traditional imaging system.

关键词： optical design tolerancing optical testing cryogenic

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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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Afocal viewport optics for underwater imaging 15

Afocal viewport optics for underwater imaging

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conference on current developments in Lens design and optical engineering XV

作者： Slater, Dan 1352 Dorothea Rd La Habra Hts CA 90631 USA

ISBN: (纸本)9781628412192

A conventional camera can be adapted for underwater use by enclosing it in a sealed waterproof pressure housing with a viewport. The viewport, as an optical interface between water and air needs to consider both the camera and water optical characteristics while also providing a high pressure water seal. Limited hydrospace visibility drives a need for wide angle viewports. Practical optical interfaces between seawater and air vary from simple flat plate windows to complex water contact lenses. This paper first provides a brief overview of the physical and optical properties of the ocean environment along with suitable optical materials. This is followed by a discussion of the characteristics of various afocal underwater viewport types including flat windows, domes and the Ivanoff corrector lens, a derivative of a Galilean wide angle camera adapter. Several new and interesting optical designs derived from the Ivanoff corrector lens are presented including a pair of very compact afocal viewport lenses that are compatible with both in water and in air environments and an afocal underwater hyper-hemispherical fisheye lens.

关键词： Afocal lens design underwater photography water contact lens Ivanoff corrector lens dome port hyperhemispherical fisheye lens

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Integration design of rigid endoscope with different viewing angles 16

Integration design of rigid endoscope with different viewing...

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conference on current developments in Lens design and optical engineering XVI

作者： Zhang, Lingyun Cheng, Dewen Wang, Yongtian Beijing Inst Technol Sch Informat Sci & Technol Dept Optoelect Engn Beijing 100081 Peoples R China

ISBN: (纸本)9781628417449

High definition and magnification rigid endoscope is a significant equipment in the examination and surgery. In this paper, the design of a high definition (HD) rigid endoscope with zero viewing direction is presented with a FOV of 70. The entrance pupil is 0.3 mm, achieved for the first time to our best knowledge. For the fabricated prototype, the theoretical resolution is 22.3 lp/mm at an object distance of 20 mm, and the depth of field (DOF) is 115 mm The performance is proved to be great for observation during diagnosis and surgery. Besides, the endoscope with non-zero viewing direction is more needful in some conditions such as observing and diagnosing lesions on inner walls of organs and tissues. In this paper, we present two designs with non-zero viewing direction for better applications.

关键词： optical design rigid endoscope high definition depth of field stray light

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Using off-the-shelf components in the design of curved compound eye camera systems 25

Using off-the-shelf components in the design of curved compo...

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conference on current developments in Lens design and optical engineering XXV

作者： Allain, Guillaume Rabia, Sedick Thibault, Simon Univ Laval Fac Sci & Genie Dept Phys 2325 Rue Univ Quebec City PQ Canada Ctr Opt Photon & Laser 2375 Rue Terrasse Quebec City PQ Canada

ISBN: (纸本)9781510679221;9781510679238

The fabrication of curved compound eye camera systems is usually complex since it can involve multiple nonstandard components to achieve the desired effect. In this paper we aim to provide a close alternative to these custom optical elements using off the shelf components or to provide a framework to design these systems using standard fabrication techniques. We will first demonstrate how lens distortion can be leveraged to optically bend a standard planar microlens array, and how this bending correlates to a curved microlens array. We will then show lab results of curved compound eye camera made using an off-the-shelf fisheye lens and a standard microlens array and how the equivalent curved microlens array system reproduces image in the real world and provide a comparison using image simulation from an optical design software and a scene recorded using a neural radiance field.

关键词： Optics Lens design Compound eye Lens distortion Biomimetics NERF

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A Toolkit for Multiscale optical System Inverse-design 23

A Toolkit for Multiscale Optical System Inverse-Design

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conference on current developments in Lens design and optical engineering XXIII Part of SPIE Optics and Photonics conference

作者： Campbell, Sawyer D. Jenkins, Ronald P. Zerbe, Benjamin A. Whiting, Eric B. Balasubramanian, Manushanker Das, Arkaprovo Young, Jacob T. Werner, Douglas H. Werner, Pingjuan L. Penn State Univ Sch Elect Engn & Comp Sci University Pk PA 16802 USA

ISBN: (纸本)9781510654198;9781510654181

optical system design is undergoing a transformational change with the increases in computational horsepower, cutting-edge algorithmic developments, and the advent of new nanofabrication technologies. Among the most exciting advances in recent memory are optical metasurfaces, which are patterned surfaces commonly realized through nanofabrication that can imbue optical engineers with expanded degrees of design freedom due to their ability to exploit the generalized form of Snell's law. Through intelligent optimization and design, metasurfaces can be constructed which achieve arbitrary chromatic dispersion behaviors and unprecedented control over polarization that simply cannot be realized with conventional optical elements. However, designing high-performance metasurfaces requires the use of full-wave simulation tools and numerical optimization techniques which necessitate considerable computational resources. Moreover, while optical metasurfaces are moving towards millimeter and centimeter scale diameter lenses with advances in nanofabrication techniques, it is computationally infeasible to employ full-wave simulation tools directly to model optical systems that use such large size elements. Nevertheless, the size, weight, and power (SWaP) advantages afforded by optical metasurfaces make them a compelling choice for designers to consider in a number of applications, which are currently limited by bulky conventional optical solutions. Therefore, techniques that can rapidly model metasurfaces in conjunction with conventional optical elements such as lenses, mirrors, and prisms are highly desirable. In this presentation, we highlight a toolkit of custom solvers, design procedures, and powerful optimization algorithms that simplify and accelerate the development of hybrid optical systems with arbitrary combinations of conventional and metasurface elements.

关键词： optical design optimization inverse-design gradient-index lenses metasurfaces simulation multiscale

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Consumer Electronic Optics: How Small a Lens Can Be Using Metasurfaces 20

Consumer Electronic Optics: How Small a Lens Can Be Using Me...

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conference on current developments in Lens design and optical engineering XX

作者： Thibault, Simon Univ Laval Ctr Opt Photon & Lasers COPL Quebec City PQ Canada Immervis Inc Montreal PQ Canada

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

Miniature optics are used in many applications and particularly in consumer optics for such products as webcams, mobile phones, automotive components, endoscopes, tablets, and many other connected devices. Mobile phone cameras are probably the ones that have driven the race for shorter TTL over the past 10 years. Ten years ago, cell phone cameras were composed of 3-4 optical plastic elements within one camera lens;today it takes more than 6 optical elements to obtain mega pixel resolution. But it is still not enough. The market has an insatiable appetite for greater optical performance. Consequently, the lens system has become more complex and now may require more optical elements with more complex optical functions. In this context, can the metasurface lens play a role? In this paper, we will try to address this question and discuss how metasurfaces promise to become a game changer in the consumer electronics market.

关键词： Lens design Metasurface Dielectric Nanofin Aberration Cell Phone Camera Phone

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Achrotech: achromat cost versus performance for conventional, diffractive and GRIN components 17

Achrotech: achromat cost versus performance for conventional...

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conference on current developments in Lens design and optical engineering Xvii

作者： Morris, Jeffrey Wolf, Greg Vandendriessche, Stefaan Sparrold, Scott Edmund Opt 6464 E Grant Rd Tucson AZ 85711 USA Edmund Opt 101 East Gloucester Pike Barrington NJ 08007 USA

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

An achromatic component shares a common focus at two wavelengths and is a commonly used device in optical assemblies. This work explores the cost versus performance tradeoff for several types of achromatic lenses: conventional doublets with homogenous glass elements, hybrid doublets with a diffractive surface, axial GRadient INdex (GRIN) lenses (where the index of refraction changes along the length of the lens), and radial GRIN lenses (where the index of refraction changes depending on radial position). First order achromatic principles will be reviewed and applied to each system as a starting point and refined through the use of ray trace software. optical performance will be assessed in terms of focusing efficiency and imaging. Cost will then be evaluated by accounting for current manufacturing costs and retail price through several distributors.

关键词： achromat GRIN lens diffractive lens axial color longitudinal color spherochromatism lens design

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Graphically selecting optical components and housing material for color correction and passive athermalization

Graphically selecting optical components and housing materia...

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conference on current developments in Lens design and optical engineering XIII

作者： Schwertz, Katie Dillon, Dan Sparrold, Scott Edmund Opt Tucson AZ USA

ISBN: (纸本)9780819492036

This paper will demonstrate a graphical method for selecting a pair of optical components to simultaneously achromatize and passively athermalize an imaging lens for use in a housing with a particular coefficient of thermal expansion. The effort will be presented for a generic spectrum, so readers may apply the method to whatever waveband and set of materials that are of interest. The term "component" is used in place of "material" since this paper will explore combinations of refractive and diffractive optics. The method for creating an achromat with two refractive materials will be reviewed. To create an athermal doublet, or lens that does not change focus under temperature changes, the same color equations are used with a slight modification to include housing thermal effects. The paper will culminate by demonstrating how a set of two materials can be used to both color correct and passively athermalize a single lens;these materials can be quickly chosen to match a particular housing material via nomograph. A sample chart for a common waveband will be demonstrated.

关键词： lens design optical design passively athermal thermal defocus achromatic graphic solution

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