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

共 467 条记录，以下是161-170 订阅

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Replication optics for a holographic 3D display system

Replication optics for a holographic 3D display system

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conference on current developments in lens design and optical engineering IV

作者： Wood, A Smith, M Stanley, M Thales Opt Ltd St Asaph LL17 0LL Denbigh Wales

ISBN: (纸本)0819450464

The display of 3D images containing all the depth cues required by the human vision system can be achieved using a reconfigurable Computer Generated Hologram (CGH) with high pixel count. A technique which has been developed to produce CGH's with the required number of pixels, and at video refresh rates, is known as Active Tiling((TM)) (AT). At the heart of an AT system is a set of replication optics which produces multiple images of a Spatial Light Modulator (SLM) onto the CGH. The design of two alternative optical systems for generating a 5x5 tiled array of de-magnified images of a single object is discussed. Results are presented from a 4-channel AT system which has recently been built and demonstrated.

关键词： optical design computer generated holograms 3D display

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A new method to treat a spherical lens as a combination of two perpendicular lengthless cylindrical lenses in ray tracing

A new method to treat a spherical lens as a combination of t...

引用

conference on current developments in lens design and optical engineering IV

作者： Al-Ali, LS Rasheed, KH Ajman Univ Sci & Technol Ajman U Arab Emirates

ISBN: (纸本)0819450464

We present a new suggestion for treating skew rays. In the new suggestion. we hypothetically divide a spherical lens. at each point of intersection of the incident rays with the spherical lens. into two effective perpendicular lengthless cylindrical lenses. One of the hypothetical cylindrical lenses is effective in the vertical direction while the other is effective in the horizontal direction. A method is given for calculating the resulted vertical and horizontal angles of refraction. After calculating these angles one can combine. at that point of incidence. the two components into a vector sum to find the resultant refracted ray. The new suggested method is first discussed and demonstrated for one single lens. and then generalized to optical systems of many components. The method's power and effectiveness in lens and optical systems design is demonstrated. A software package is designed and written for the purpose of optical ray tracing. The new method is implemented in this software. The name we gave to this package is "CALOSD". CALOSD is an acronym for Computer Aided lens and optical Systems design. CALOSD is capable of producing very accurate tabulated data as well as graphical displays of an optical system and rays traced from different points or angles of view: including a top view.

关键词： lens design ray tracing meridian and skew rays approximate and exact methods

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A novel laser Doppler linear encoder using multiple-reflection optical design for high-resolution linear actuator

A novel laser Doppler linear encoder using multiple-reflecti...

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conference on current developments in optical design and engineering vii

作者： Shu, DM Alp, EE Barraza, J Kuzay, TM Mooney, TM Argonne Natl Lab Expt Facil Div Adv Photon Source Argonne IL 60439 USA

ISBN: (纸本)0819428841

A novel laser Doppler linear encoder system (LDLE) has been developed at the Advanced Photon Source, Argonne National Laboratory A self-aligning 3-D multiple-reflection optical design was used for the laser Doppler displacement meter (LDDM) to extend the encoder system resolution. The encoder is compact [about 70 mm(H) x 100 mm(W) x 250 mm(L)] and it has sub-Angstrom resolution 100 mm/sec measuring speed, and 300 mm measuring range. Because the new device affords higher resolution, as compared with commercial laser interferometer systems, and yet cost less, it will have good potential for use in scientific and industrial applications.

关键词： linear encoder angular encoder laser encoder high resolution actuator

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Syntheses of new type high-property optical resin

Syntheses of new type high-property optical resin

引用

conference on current developments in optical design and engineering vii

作者： Ren, H Gao, CY Cui, ZC Yang, B Shen, JC Jilin Univ Dept Chem Changchun 130023 Peoples R China

ISBN: (纸本)0819428841

2,3-dimercaptoethylthiopropanethiol (B-thiol), 2,2,2'-dimercaptoethyl sulfide dimethacrylate (MESDMA), and 2-phenylthioethyl thiomethacrylate (MEPSMA) were prepared, which structures were confirmed by IR and (HNMR)-H-1 spectroscopy. A series of homopolymer resin (such as, B-thiol/MDI) and copolymer resin (such as MESDMA/St (25 similar to 50%), and MESDMA/St/MEPSMA) were further prepared, which optical and mechanical properties were much better than thoes of the ordinary resins. The studies and development of such optical resins would be expected to meet the need of optical resin markets.

关键词： optical resin synthesis containing sulfur ordinary resin property 2,3-dimercaptoethyl thiopropanethiol 2,2 '-dimercaptoethyl sulfide dimethacrylate 2-phenylthioethyl thiomethacrylate refractive index impact strength

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optical design process of a human eye inspired lens 23

Optical design process of a human eye inspired lens

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

作者： Allain, Guillaume Thibault, Simon Univ Laval Fac Sci & Genie Dept Phys Genie Phys & Opt 1045 Ave Med Laval PQ G1V 0A6 Canada COPL 2375 Rue Terrasse Quebec City PQ G1V 0A6 Canada

ISBN: (纸本)9781510654198;9781510654181

Bio-inspired optical design can be described as a conscious decision in the design process to take inspiration from physical adaptation that were brought up by natural selection. The usual goal is to introduce non-conventional techniques or material in order to achieve better performance or novel applications. However, when the target is to imitate closely the form-factor, appearance and optical properties of a biological system, new requirements are added to the design process and new problems arises. In this paper, we will expose the design of an optical system that draws most requirements from both the optical properties and the form-factor of the human eye. However, contrary to human eye models, the main requirements for this project is to make a realistic design which can be assembled as a prototype. The design process will be laid out, by firstly introducing system requirements and various performance targets that comes from the bio-inspired design. The constraints associated with using entrance pupil's appearance as a requirement will be presented. This paper will also specifically be looking at distortion as a solution for modulating resolution throughout the field of view and as a tool to aid in those novel problems.

关键词： optical design Bio-inspired design Human eye optical design methodology optical Distortion

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Simultaneous color-mixing and collimation within LED package

Simultaneous color-mixing and collimation within LED package

引用

conference on current developments in lens design and optical engineering XIV

作者： Moreno, Ivan Rodriguez, Nayeli Carlos Basilio, Jose Univ Autonoma Zacatecas Unidad Acad Fis Zacatecas 98060 Mexico

ISBN: (纸本)9780819496911

A compact encapsulating lens is proposed and analyzed, which simultaneously collimates and mixes the tunable light from red, green and blue (RGB) light-emitting diode (LED) chips. Colored LED chips are embedded within a spherical lens, and a section of the sphere that surrounds chips is mirrored with a diffuse reflector. Color light is mixed by multiple total internal reflections (TIRs), the scattering mirror breaks TIR, and light escapes only in a narrow beam in the forward direction. The color distribution, the beam pattern, and efficiency are analyzed by Monte Carlo ray tracing calculations.

关键词： Encapsulating lens Light Projection Mix of Color Illumination Spotlights

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Achieving linearity with an optical quadrant detector tracking system 18

Achieving linearity with an optical quadrant detector tracki...

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conference on current developments in lens design and optical engineering XviiI

作者： Doherty, Victor J. Aouani, Dina Eidolon Opt LLC 3 Erie Dr Natick MA 01760 USA

ISBN: (纸本)9781510612082;9781510612075

Conventional round spot quadrant detector trackers are inherently non-linear. This non-linearity requires multiple iterations to converge onto perfect alignment with the object tracked. We created a system that generates a square spot. The convolution of a square spot with a circle, generated by the quadrant detector, allows this spot to achieve perfect alignment in one iteration. This invention is thus essential to any system that requires speed and accuracy. In this paper, we introduce the theory behind the square spot as well as the design of our linear optical quadrant detector tracking technology.

关键词： Quadrant Detector optical Tracking Sun Tracking Solar Surgery Square Spot

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Ultra-fast focal reducer design for ∼2m-class telescopes

Ultra-fast focal reducer design for ∼2m-class telescopes

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conference on current developments in lens design and optical engineering V

作者： Beach, D Appl Phys Ltd Christchurch 8153 New Zealand

ISBN: (纸本)0819454613

An ultra-fast focal reducer design originally intended for use with spherical primary mirrors (published in optical engineering, February, 2003), has been adapted for use as a retro-fit for existing telescopes of similar to2m pupil diameter that have aspheric mirrors. The focal reducer has only one aspheric surface, located at the aperture stop, and can provide speeds up to f/0.75 while maintaining a wide field with pixel-limited resolution and a broad spectral passband. Examples have been computed for Ritchie-Chretien, Dall-Kirkham and Cassegrain systems, and for use at the prime focus of mirrors with non-zero conic constants.

关键词： focal reducer high speed high resolution wide angle broad spectral passband retrofit telescopes

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Modeling of polychromatic MTF losses due to secondary effects in diffractive lenses

Modeling of polychromatic MTF losses due to secondary effect...

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conference on current developments in lens design and optical engineering viiI

作者： Thorpe, Michael D. Jonas, Reginald P. Szapiel, Stanislaw ELCAN Opt Technol 450 Leitz Rd Midland ON L4R 5B8 Canada

ISBN: (纸本)9780819468154

Although hybrid (i.e. refractive-diffractive) surfaces are in common use in optical design there are several phenomena which affect design MTF that are not routinely modeled in current commercial versions of optical desig,n software. Typically the details of the diffractive structure are not taken into account and rays are traced through the hybrid surface employing a vector grating equation which uses the phase gradient associated with the diffractive definition to calculate a local grating spacing and orientation and from this grating information a 'diffracted ray' angle. This geometrical-optics based procedure has limitations;(I)it considers only the design diffraction order, (2)it does not take into account the sub-aperturing effect whereby color correction is reduced along, with zone count, and (3) the model used does not generate an exact blaze profile. In this paper we discuss progress in application of diffraction-based beam propagation tools in combination with a physical definition of the diffractive structure to more accurately model these secondary effects on design MTF. Results are given for some simple lenses and also the effects to be expected for a more complex zoom lens.

关键词： lens design lenses

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design and Prototyping of a Freeform Light-Guide for Automotive Lighting 19

Design and Prototyping of a Freeform Light-Guide for Automot...

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

作者： Brand, Audrey C. Alisafaee, Hossein Rose Hulman Inst Technol Dept Phys & Opt Engn 5500 Wabash Ave Terre Haute IN 47803 USA

ISBN: (数字)9781510620629

ISBN: (纸本)9781510620629

We have designed a light-guide for lighting applications, including automotive headlamps. The light-guide is designed based on a free-form slab. Our intention has been to optimize the design for creating legal patterns. One of our objectives has been to investigate how the changes in the shape of the freeform light-guide affects the light pattern, and how the light source geometry affects the design. For prototyping purpose, we use a particular polymer that exhibits optical performance close to acrylic (PMMA).

关键词： Automotive Lighting Lighting Light-guide optical design Illumination

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