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

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Double micro-prism array design for reducing dispersion on prism-based stereo camera system

Double micro-prism array design for reducing dispersion on p...

引用

Conference on current developments in lens design and optical engineering XIV

作者： Sun, Wen-Shing Chu, Pu-Yi Natl Cent Univ Dept Opt & Photon Chungli 32001 Taiwan

We apply a digital camera with two prism arrays to capture a stereo image of the corrected chromatic aberration and distortion. The doublet prisms are used to correct chromatic aberration. The camera distortion with t... 详细信息

ISBN: (纸本)9780819496911

关键词： stereo image two prism arrays chromatic aberration distortion

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Calibrations and idiosyncrasies of micro-lensed CCD cameras

Calibrations and idiosyncrasies of micro-lensed CCD cameras

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8th Conference on current developments in optical design and optical engineering

作者： Penkethman, JA Electroglas Inc Santa Clara CA USA

ISBN: (纸本)0819432652

Modern CCD cameras that are typically produced in high volume for consumer and machine vision applications can be used as precisely calibrated image sensors. New CCD chips with on-chip micro lens arrays, however, have some characteristics that limit design choices where precise illumination uniformity is required The micro lenses cause vignetting and limit the angular aperture of each pixel. This paper measures vignetting and consequent shading for a typical micro lensed CCD chip. Nevertheless, when properly designed, camera systems employing these advanced CCD chips can be precisely calibrated with respect to face plate irradiance.

关键词： CCD micro lens array calibration irradiance uniformity illumination uniformity on-chip lens array

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Challenges using data-driven methods and deep learning in optical engineering 23

Challenges using data-driven methods and deep learning in op...

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Conference on current developments in lens design and optical engineering XXIII Part of SPIE Optics and Photonics Conference

作者： Buquet, Julie Parent, Jocelyn Lalonde, Jean-Francois Thibault, Simon Univ Laval 2325 Rue Univ Quebec City PQ Canada Immervision 2020 Blvd Robert Bourassa Montreal PQ Canada

ISBN: (纸本)9781510654198;9781510654181

Data driven approaches have proven very efficient in many vision tasks and are now used for optical parameters optimization in application-specific camera design. A neural network is trained to estimate images or image quality indicators from the optical characteristics. The complexity and entanglement of such optical parameters raise new challenges we investigate in the case of wide-angle systems. We highlight them by establishing a data-driven prediction model of the RMS spot size from the distortion using mathematical or AI-based methods.

关键词： Computational optics End-to-End design Wide-angle systems Learning-based PSF estimation Distortion Data-driven optical engineering

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Rotating prisms scanning system to equip a NFOV camera lens

Rotating prisms scanning system to equip a NFOV camera lens

引用

8th Conference on current developments in optical design and optical engineering

作者： Curatu, E Chevrette, P StGermain, D Natl Opt Inst St Foy PQ G1P 4N8 Canada

ISBN: (纸本)0819432652

This paper presents the results given by the nominal design and tolerance analysis of a narrow-field-of-view camera lens equipped with a rotating prism scanning system. The first aspects taken into consideration have been the compensation of the chromatic aberration, distortion reduction, and the correlation between depth-of-field and lens resolution. Then, a rigorous approach to determine the relationship between the field-of-regard direction and the prism orientations is discussed. Finally, the tolerance analysis results give the predictable pointing direction precision as function of the system tolerances.

关键词： rotating prisms Risley prisms scanning system

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Tunable refraction power by mutual rotation of helical lens parts 18

Tunable refraction power by mutual rotation of helical lens ...

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Conference on current developments in lens design and optical engineering XviiI

作者： Sieber, Ingo Martin, Thomas Stiller, Peter Karlsruhe Inst Technol Inst Appl Comp Sci Hermann von Helmholtz Pl 1 D-76344 Eggenstein Leopoldshafen Germany

ISBN: (纸本)9781510612082;9781510612075

This paper presents a refractive optical system consisting of two lens bodies with helical surface structures, which allows for tuning the optical refraction power by means of a mutual rotation of the lens bodies around the optical axis. Thus, the refraction power can be tuned continuously in a certain range. The helical surfaces are shaped by changing the radius of curvature as a function of to the polar angle. Combination of such two surfaces results in an optics with refraction power being tunable by a mutual rotation. This optical system is multifocal with at least two sectors with different individually tunable refraction powers. To obtain a monofocal rotation optics, obscuration of one of the lens sectors is necessary. Conventional lens systems providing tunable refraction power do so by mutual axial or lateral shift of the lenses or the lens parts. Hence, additional space for lens movement is needed in the mechanical design. Since the rotational optics allows for adjustment of the refraction power by a mutual rotation of the lens parts, no displacement of lenses is needed and a more compact design is obtained.

关键词： Freeform optics varifocal optics rotation optics

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Chromatic error correction of diffractive optical elements at minimum etch depths 15

Chromatic error correction of diffractive optical elements a...

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Conference on current developments in lens design and optical engineering XV

作者： Barth, Jochen Guehne, Tobias Airbus Def & Space Landshuter Str 26 D-85716 Unterschleissheim Germany Airbus Def & Space D-81663 Munich Germany

ISBN: (纸本)9781628412192

The integration of diffractive optical elements (DOE) into an optical design opens up new possibilities for applications in sensing and illumination. If the resulting optics is used in a larger spectral range we must correct not only the chromatic error of the conventional, refractive, part of the design but also of the DOE. We present a simple but effective strategy to select substrates which allow the minimum etch depths for the DOEs. The selection depends on both the refractive index and the dispersion.

关键词： Diffractive optics Aberration compensation

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Ultra-compact hourglass lens for integrated cameras 16

Ultra-compact hourglass lens for integrated cameras

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Conference on current developments in lens design and optical engineering XVI

作者： Rezaei, Mohsen Nia, Iman Hasani Bonakdar, Alireza Mohseni, Hooman Northwestern Univ Dept Elect Engn & Comp Sci Bioinspired Sensors & Optoelect Lab BISOL Evanston IL 60208 USA

ISBN: (纸本)9781628417449

An ultra-small telecentric lens with sub-millimeter thickness is proposed. This lens with 0.2 numerical aperture and high field of view is a good candidate to be used in multi-aperture super resolution imagers. Point spread function and the telecentricity of the lens is extracted numerically and measured experimentally. The ray-optics simulation results show nearly diffraction limited performance for the lens.

关键词： Cameras Imaging systems Point spread functions Silicon Image sensors lens design Infrared cameras Modulation transfer functions Super resolution Sensors

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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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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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Effect of Injection Molding Processing Conditions on optical Properties of Polyetherimide 15

Effect of Injection Molding Processing Conditions on Optical...

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Conference on current developments in lens design and optical engineering XV

作者： Zhao, Wei Wall, Christopher Maddikeri, Raghavendra May, Andy SABIC Innovat Plast LLC 1 Lexan Lane Mt Vernon IN 47620 USA SABIC Innovat Plast LLC Pittsfield MA 01201 USA

ISBN: (纸本)9781628412192

SABIC's ULTEM (TM) (polyetherimide) resin has been the choice of material for injection moldable micro lenses and lens arrays in optical communication components such as transceivers due to its unique combination of physical, thermal and optical properties including high refractive index, low absorption in near IR range, good dimensional stability and high heat performance. It's known that processing conditions affect properties of final parts. Often the processing conditions are optimized for best mechanical properties, while their effect on optical properties is sidelined. In this study, the effect of injection molding processing conditions on optical properties of polyetherimide resin is discussed.

关键词： Polyetherimide Injection Molding Processing Conditions optical Properties lens

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