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

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Automated design and fabrication of ocular optics

Automated design and fabrication of ocular optics

引用

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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A lazy way to design infrared lens 18

A lazy way to design infrared lens

引用

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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Calibration of 3D ring lens systems

Calibration of 3D ring lens systems

引用

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

作者： Ahmed, YA Afifi, H Rubino, G ENST Bretagne Networks & Multimedia Serv Dept F-35512 Cesson Sevigne France

ISBN: (纸本)0819432652

We have designed a new kind of 3D image capture system based on a new 3D ring lens(1). In this paper we represent a calibration procedure for this kind of systems using the information from the surrounding environment. It is mainly based on motion in one direction with known value and establishing the correspondence between the successive views to derive system parameters. The main differences between calibration of the traditional stereo systems and the new one are also discussed.

关键词： stereo epipolar geometry camera calibration self-calibration projection matrix fundamental matrix 3D lens and camera models

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Gain in optical Coatings

Gain in Optical Coatings

引用

conference on current developments in lens design and optical engineering XIII

作者： Macleod, Angus Clark, Christopher Thin Film Ctr Inc Tucson AZ 85716 USA

ISBN: (纸本)9780819492036

The introduction of gain into an optical medium is most easily accomplished by reversing the sign of the extinction coefficient. The theoretical expression for reflectance at a simple boundary between a dielectric, lossless incident medium and a medium with a finite extinction coefficient, however, takes no account of the sign of the extinction coefficient In such an arrangement, therefore, can the presence of gain possibly result in an enhanced reflectance? Opinions in the literature differ but tend to find enhancement beyond the critical angle and none below. This study examines both cases and shows that all results are in fact correct but they are not necessarily stable and it is their stability, or lack of it, that leads to the different results.

关键词： Gain in optical coatings optical coating theory admittance loci with gain

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Multiagent System in Automatic Light Power Balance in optical Networks

Multiagent System in Automatic Light Power Balance in Optica...

引用

conference on current developments in lens design and optical engineering XIV

作者： Slapak, Martin Hula, Milislav CESNET Ale Prague 16000 6 Czech Republic

ISBN: (纸本)9780819496911

This article deals with automatic power balancing along an optical line. For optimal transmission of an optical signal it is important to achieve certain parameters such as the signal to noise ratio orchromatic dispersion and also the sufficient output power level of in-line amplifiers. Pump diodes in amplifiers suffer from aging of material and therefore the driving current of pump diodes has to be accordingly increased to achieve the same gain as in the moment when the pump diodes were new. The use of a minimal required driving current leads to the longer lifetime of optical pumps. Therefore an automatic power balance is one of the methods used to achieve these goals.

关键词： Multiagent system automatic power balance gain control

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Practical guide to saddle-point construction in lens design

Practical guide to saddle-point construction in lens design

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conference on current developments in lens design and optical engineering VIII

作者： Bociort, Florian van Turnhout, Maarten Marinescu, Oana Delft Univ Technol Opt Res Grp Lorentzweg 1 NL-2628 CJ Delft Netherlands

ISBN: (纸本)9780819468154

Saddle-point construction (SPC) is a new method to insert lenses into an existing design. With SPC, by inserting and extracting, lenses new system shapes can be obtained very rapidly, and we believe that, if added to the optical designer's arsenal, this new tool can significantly increase design productivity in certain situations. Despite the fact that the theory behind SPC contains mathematical concepts that are still unfamiliar to many optical designers, the practical implementation of the method is actually very easy and the method can be fully integrated with all other traditional design tools. In this work we will illustrate the use of SPC with examples that are very simple and illustrate the essence of the method. The method can be used essentially in the same way even for very complex systems with a large number of variables, in situations where other methods for obtaining new system shapes do not work so well.

关键词： optical system design optimization saddle points

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Tunable GRIN PDMS-made lenses with aspheric profile 19

Tunable GRIN PDMS-made lenses with aspheric profile

引用

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

作者： Reyes-Perez, Emilio R. Cruz-Felix, Angel S. Santiago-Alvarado, Agustin Marquez-Garcia, Josimar Technol Univ Mixteca Inst Phys & Math Carretera Acatlima Km 2-5 Huajuapan De Leon 69000 Oax Mexico

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

Previously, we have studied the behavior of PDMS samples with variation of its synthesis parameters and it has been shown that there exists a direct relation with the variation of its physical parameters such as its refractive index. This property is useful to develop a surface with variable refractive index. In this work we present the design and study of a refractive surface PDMS-made multilayer lens with aspheric profile. The lens has been mounted into a mechanical mounting system to introduce low order aberrations.

关键词： Tunable lens GRIN lens aspheric profile crystalline lens

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An easy way to relate optical element motion to system pointing stability - art. no. 62880I

An easy way to relate optical element motion to system point...

引用

conference on current developments in lens design and optical engineering VII

作者： Burge, J. H. Univ Arizona Coll Opt Sci Tucson AZ 85721 USA

ISBN: (纸本)0819463671

The optomechanical engineering for mounting lenses and mirrors in imaging systems is frequently driven by the pointing or jitter requirements for the system. A simple set of rules was developed that allow the engineer to quickly determine the coupling between motion of an optical element and a change in the system line of sight. Examples are shown for cases of lenses, mirrors, and optical subsystems. The derivation of the stationary point for rotation is also provided. Small rotation of the system about this point does not cause image motion.

关键词： optical alignment optomechanics pointing stability geometrical optics

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Scene-based sensor modeling using optical design software

Scene-based sensor modeling using optical design software

引用

conference on current developments in lens design and optical engineering VIII

作者： Fisher, John Brandywine Opt Inc Chester PA USA

ISBN: (纸本)9780819468154

The traditional approach to optical system engineering separates the scene, optics, and detector as static entities, optimizing the design to meet subsystem specifications of aperture, field size, encircled energy, read noise, dynamic range, and other electro-optical properties. The Scene-Based Sensor Model (SBSM) represents a different approach by simulating the scene, optics and detector as a cohesive model using commercially available optical ray-tracing software. The objects are modeled as temporally changing entities, with characteristics including reflectance, absorbance, fluorescence, and scattering. Likewise, the detectors are modeled with their properties of temporal noise, spatial non-uniformity, nonlinear gain, and offset drift. The end-to-end simulation produces "photons-to-bits" analysis applicable to a variety of optical systems. First results are illustrated with ray tracing simulation of moving fluorescent objects and laser induced breakdown spectroscopy.

关键词： optical system design ray-tracing simulation sensor model FRED optical design software Matlab

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

Achrotech: achromat cost versus performance for conventional...

引用

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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