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Landsat-swath Imaging Spectrometer design 16

Landsat-swath Imaging Spectrometer Design

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conference on current developments in Lens design and optical engineering Xvi

作者： Mouroulis, Pantazis Green, Robert O. Van Gorp, Byron Moore, Lori Wilson, Daniel W. Bender, Holly A. CALTECH Jet Prop Lab Pasadena CA 91109 USA

ISBN: (纸本)9781628417449

We describe the design of a high-throughput pushbroom imaging spectrometer and telescope system that is capable of Landsat swath and resolution while providing better than 10 nm per pixel spectral resolution. The design is based on a 3200 x 480 element x 18 mu m pixel size focal plane array, two of which are utilized to cover the full swath. At an optical speed of F/1.8, the system is the fastest proposed to date to our knowledge. The utilization of only two spectrometer modules fed from the same telescope reduces system complexity while providing a solution within achievable detector technology. Predictions of complete system response are shown. Also, it is shown that detailed ghost analysis is a requirement for this type of spectrometer and forms an essential part of a complete design.

关键词： Imaging spectrometer Landsat Dyson spectrometer

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design of ergonomic handpieces for a CO₂ laser system for surgical and cosmetological applications 19

Design of ergonomic handpieces for a CO<sub>2</sub> laser sy...

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19th conference on current developments in Lens design and optical engineering

作者： Zavatskaia, Kseniia Voznesenskaya, Anna ITMO Univ Dept Appl & Comp Opt St Petersburg Russia

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

The CO2 laser systems are widely used for different specialised surgery types and cosmetological procedures. The market is filled with various offers regarding the systems, however, every manufacturer supplies a very limited range of handpieces with the equipment. Thus, the work of surgeon or a medical worker is complicated by the discrepancy of a handpiece with the ergonomic/ technical requirements for a specific procedure. It may result in negative consequences of the procedure itself or a choice not in favor of laser technologies. The work presents the design of optical system and construction of specialised handpieces for CO2 laser system based on the discussion with medical workers of several hospitals that directly interact with the equipment and the technical requirements of medical procedures.

关键词： CO2 laser handpiece laser surgery optical design

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A lazy way to design infrared lens 18

A lazy way to design infrared lens

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conference on current developments in Lens design and optical engineering XviII

作者： Qiu, RongSheng Wu, JianDong Chen, LongJiang Yu, Kun Pang, HaoJun Hu, BaiZhen Shanghai Aerosp Control Technol Inst 1555 ZhongChun Rd Shanghai 201109 Peoples R China

ISBN: (纸本)9781510612082;9781510612075

We designed a compact middle-wave infrared (MWIR) lens with a large focal length ratio ( about 1.5:1), used in the 3.7 to 4.8 mu m range. The lens is consisted of a compact front group and a re-imaging group. Thanks to the compact front group configuration, it is possible to install a filter wheel mechanism in such a tight space. The total track length of the lens is about 50mm, which includes a 2mm thick protective window and a cold shield of 12mm. The full field of view of the lens is about 3.6 degrees, and F number is less than 1.6, the image circle is about 4.6mm in diameter. The design performance of the lens reaches diffraction limitation, and doesn't change a lot during a temperature range of -40 degrees C+60 degrees C This essay proposed a stepwise design method of infrared optical system guided by the qualitative approach. The method fully utilize the powerful global optimization ability, with a little effort to write code snippet in optical design software, frees optical engineer from tedious calculation of the original structure.

关键词： infrared optical system lens design athermalization filter wheel multispectral sensing

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Focusing regions evolution under linear transformations in the boundary condition 17

Focusing regions evolution under linear transformations in t...

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conference on current developments in Lens design and optical engineering XviI

作者： Garcia-Guzman, A. De los Santos-Garcia, S. I. Torres, M. A. Munoz, J. Martinez-Niconoff, G. Inst Nacl Astrofis Opt & Elect INAOE Dept Opt Postal 51 & 216 Puebla Mexico

ISBN: (数字)9781510602861

ISBN: (纸本)9781510602854;9781510602861

The properties of optical surfaces generated by diffraction are studied analyzing the changes in the curvature function of the boundary condition. The study leads to establish a classification for the optical fields as elliptical, hyperbolical or parabolic. The elliptical regions are separated from hyperbolic regions by a region of parabolic type, which corresponds to optical focusing regions. The main result of the analysis leads us to describe and to control bifurcations and vortices effects allowing to geometrize and to control the topological properties of the optical field. For this feature is important to control the geometry of the parabolic region, obtained by controlling the curvature function in the boundary condition. The model is implemented experimentally applying a linear transformation in transmittances of zone plate type. The experimental results corroborate the theoretical predictions

关键词： Diffraction Zone plates Lead optical components Transmittance Fractal analysis optical design optical tweezers Particles Spectroscopy

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The importance of Petzval correction in generalized Offner designs 11

The importance of Petzval correction in generalized Offner d...

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conference on current developments in Lens design and optical engineering XXI

作者： Rogers, John R. Rakich, Andrew Synopsys Inc 199 S Los Ro Bles Ave Pasadena CA 91101 USA Mersenne Opt Consulting 41 Rimu Rd Raumati Beach 5032 Paraparaumu New Zealand

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

In this paper we examine the third-order aberrations of the "generalized Offner" family of designs comprising three concentric mirrors, with the first and third mirrors being not necessarily identical in radius and including the possibility that the object might be displaced from the common centers of curvature. We develop analytic expressions relating the first-order and third-order properties of the system to the radii of the three mirrors and to the object distance. Although one might expect a ring-field system to be relatively tolerant of field curvature, we show that the Petzval Sum affects the other aberrations in an extraordinary manner.

关键词： Lens design aberration theory monocentric concentric

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Assessment, optimization, and tolerancing methods for visual instruments

Assessment, optimization, and tolerancing methods for visual...

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conference on current developments in Lens design and optical Systems engineering

作者： Deslis, A Mouroulis, P Davidson Optron Inc W Covina CA 91790 USA

ISBN: (纸本)0819437387

A strategy for optimizing both the on-axis and the off-axis performance of coherently (directly) coupled visual instruments is presented. The strategy draws on the recently published body of data regarding the influence of various individual Seidel aberration and aberration combinations on subjective contrast sensitivity and resolution tasks, as well as studies on the correlation between subjective image quality and objective instrumental figures of merit. An MTF-based metric allows both optimization and tolerancing to be performed in a coherent manner that is based on experimental results of the effects of aberrations.

关键词： optimization visual systems optical design tolerancing MTF

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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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Eliminating Dewar Narcissus artifacts induced by moving optics in infrared staring focal plane sensors

Eliminating Dewar Narcissus artifacts induced by moving opti...

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conference on current developments in Lens design and optical engineering XIII

作者： McCulloch, Philip M. Olson, Craig Goodman, Timothy D. L3 Commun Sonoma EO Santa Rosa CA 95403 USA

ISBN: (纸本)9780819492036

Staring infrared imagers have multiple surfaces within the integrated Dewar assembly which contribute to non-traditional Narcissus artifacts. Static non-uniformity correction is insufficient to remove dynamic Narcissus artifacts caused by moving focus or zoom groups. Dynamic Narcissus artifacts often manifest as rings apparent to the human eye, although they may lie near the noise floor of the imager. Moreover, strong field curvature of the Narcissus can complicate diagnosis using paraxial methods. We compare a simple pupil ghost metric to traditional Narcissus metrics and present an experimental case study illustrating how the metric can be used during optimization to eliminate the effect.

关键词： optical design Narcissus staring array infrared optics YNI i/ibar

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Simultaneous Multiple Surfaces method applied to infrared lenses 23

Simultaneous Multiple Surfaces method applied to infrared le...

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

作者： Mayeur, T. Volatier, J. B. Druart, G. Tartas, E. Durand, A. Cau, F. Off Natl Etud & Rech Aerosp 6 Chemin Vauve Granges F-91120 Palaiseau France Lynred 364 Route Valence F-38113 Veurey Voroize France Safran Elect & Def 100 Ave Paris F-91300 Massy France

ISBN: (纸本)9781510654198;9781510654181

In optical design, the designer's experience is critical. Indeed, an experienced optical designer will often choose a better starting point for optimization than an inexperienced one. Most of the time, lens design software use a local optimization algorithm, which is why the starting point is so important to get an excellent optical system. We present here an alternative to the classical optical design method and a solution to reduce the impact of the designer's experience. Our alternative couples the Simultaneous Multiple Surfaces (SMS) method, introduced by Benitez and Minano with optimization in Zemax OpticStudio. The SMS method is a direct construction method of optical systems without optical aberrations for as many field points as the system contains surfaces. This method can deal with both aspheric and freeform optical systems depending on the dimension of the method implemented. Our implementation of the SMS method can design optical systems with three surfaces. We use the SMS method to define a freeform system with an F-number of 0.85. Then, we use this fast freeform system as a starting point to perform further optimization in Zemax OpticStudio. Finally, we achieve to design two diffraction-limited freeform systems, one over a square field of view of +/- 30 degrees and another over a rectangular field of view of +/- 33 degrees x +/- 26 degrees.

关键词： Simultaneous Multiple Surfaces freeform surfaces Cartesian oval automated method optical design

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design of projection-based augmented reality system using holographic screen display 23

Design of projection-based augmented reality system using ho...

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

作者： Nishikawa, Jun Nakamura, Tomoharu Sony Grp Corp R&D Ctr Atsugi TEC 4-14-1 Asahi Cho Atsugi Kanagawa 2430014 Japan

ISBN: (纸本)9781510654198;9781510654181

Holographic display elements (HOEs) with a high diffraction efficiency and size enlargement have been developed since 2019. To achieve high brightness and low haze, unprecedented optical systems have been proposed with a uniform chief ray angle of 0 degrees in the x-section and 70 degrees in the y-section of the HOEs. A 360 degrees cylindrical holographic screen display (CHSD) was obtained by providing a large tilt to the surface shape near the optical axis. This was done using a first-order odd aspherical coefficient for the light flux from a refractive optical system (RO). A flat holographic screen display (FHSD) is a compact, high-performance display that uses three decentered and tilted freeform mirrors to route light flux from the RO in a ball-like form. Prototyping also proposes the possibility of an augmented reality system that takes advantage of the high transparency. The design for further miniaturization while maintaining optical performance was also discussed, in which the size of the first mirror was reduced by reducing the half-field angle of the RO to approximately 6 degrees. Furthermore, by increasing the negative power of the second mirror, the small size could be maintained The size of the last mirror was dependent on the screen size and could not be reduced. By laying down the posture of this mirror, we were able to halve the size reduction in the vertical direction. In this paper, lens designs for CHSDs and FHSDs are reported. The potential of this display is also discussed.

关键词： Holographic optical elements augmented reality display freeform mirror projection lens lens design

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