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

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Man versus Machine: a Lens design Challenge

Man versus Machine: a Lens Design Challenge

引用

Conference on current developments in Lens design and optical engineering XIV

作者： Dilworth, Donald C. Shafer, David Optical Systems Design Inc. (United States) David Shafer Optical Design (United States)

After a generation of writing and improving lens design software, it is time to assess where we are. Specifically, can a modern program compete with, or surpass, the best human designers? Here we describe a friendly c... 详细信息

ISBN: (纸本)9780819496911

关键词： Lens design global optimization optimization algorithms aberration theory

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Infrared incoherent imaging: Elements of rotary encoder optical design 6

Infrared incoherent imaging: Elements of rotary encoder opti...

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current developments in optical design and engineering VI Conference

作者： Svec, CB Danaher Controls (United States)

ISBN: (纸本)0819422517

The optical system of an optical rotary encoder is presented. The requirements of the optics system are given and their effects on optical design decisions are discussed, Steps taken to insure stable operation over a -40 degrees C to +85 degrees C temperature range are presented. designing for manufacturing toleraces is discussed. A novel application of a fiber illuminator LED as a short-distance collimated source is shown to be an acceptable low-cost alternative to a laser diode. The importance of effective plastic element employment in low-cost, mass-production optical systems is demonstrated.

关键词： incoherent encoder manufacturability plastic stability

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TEMPERATURE AND AGE EFFECTS ON THE TEMPORAL STABILITY OF INVAR

TEMPERATURE AND AGE EFFECTS ON THE TEMPORAL STABILITY OF INV...

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CONF ON current developments IN optical design AND optical engineering 2

作者： STEELE, JM THOMPSON, DA JACOBS, SF BASS, DL Eastman Kodak Co. (United States) Optical Sciences Ctr./Univ. of Arizona (United States)

ISBN: (纸本)0819409251

A testing program was conducted to determine the long term temporal stability properties of sheet Invar. The tests were conducted at the University of Arizona's optical Sciences Center over a period of 9 months. Growth measurements were made using an interferometric optical technique at both ambient and elevated temperatures. Eleven specimen types, in groups of three, were included in the test. These data were combined with published historical data to establish an estimate to the long term behavior. It was found that Invar exhibits short term behavior with a rapid initial growth rate, 8 - 12 ppm/yr and time constant on the order of 100 days plus long term exponential growth at lower growth rates, 2 - 5 ppm/yr initial (end of year 1) with a three to eight year time constant. The parameters which most significantly effect Invar growth rate were found to be: time since final heat treatment; carbon content; heat treatment; and, ambient temperature.

关键词： Heat treatments Carbon Tunable lasers Data modeling Chemistry Copper Fabry–Perot interferometers Laser stabilization Signal detection Temperature metrology

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Scalable MWIR and LWIR optical system designs employing a large spherical primary mirror and small refractive aberration correctors

Scalable MWIR and LWIR optical system designs employing a la...

引用

Conference on current developments in Lens design and optical engineering ii

作者： Beach, D Ind Res Ltd Auckland New Zealand

ISBN: (纸本)0819441554

design variants of a recently developed optical imaging system have been computed for the thermal infrared spectral bands, which offer some advantages for long-range surveillance and astronomy. Only the spherical primary mirror has the fall pupil diameter, all other components being sub-diameter, so scaling is possible up to relatively large pupils. Low-cost fabrication is enabled by the prevalence of spherical optical surfaces. Both MWIR and LWIR spectral transmissions are enabled by the choice of corrector materials, the examples given employing germanium and sapphire for 3.5-5.5 mum and germanium and zinc selenide for 3.5-5.5[mum and 8-12mum passbands. Diffraction at these wavelengths is the main contributor to resolution constraints, so high numerical aperture values are preferred to enable a better match of blur spot diameter to generally available pixel dimensions. The systems described can routinely be designed to have speeds of f/0.8 or faster, while maintaining diffraction-limited performance over useful angular fields. Because the new design system employs a relayed catadioptric, it is possible to make the aperture stop of the system coincident with the window of the detector cryostat, enabling precise radiometric geometry. The central obscuration provides a convenient location for a calibration source, and both this and a mask for secondary spider supports can be included within the detector cold screen structure. Dual-band operation could be enabled by inclusion of a spectral beam splitter prior to a dual relay/imager system.

关键词： MWIR imaging LWIR imaging diffraction-limited spherical mirror optics high speed wide field

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ALIGNMENT OF AN ASPHERIC MIRROR SUBSYSTEM FOR AN ADVANCED INFRARED CATADIOPTRIC SYSTEM

ALIGNMENT OF AN ASPHERIC MIRROR SUBSYSTEM FOR AN ADVANCED IN...

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5TH CONF ON current developments IN optical design AND optical engineering

作者： TINGSTAD, JS Hughes Aircraft Co. (United States)

ISBN: (纸本)0819406554

With many optical systems the method that is used to align the optical system needs to be an integral portion of the system design and not an afterthought. Once all the pieces are in fabrication it may be too late to implement a cost-effective alignment procedure for both prototype and production designs. This is especially true with catadioptric systems where the mirror alignment tends to be very critical as far as system performance is concerned. This paper describes the design and use of an aspheric null mirror for the alignment of a two mirror subsystem to a lens cell. The optical system to be aligned was a six-in. EFL, F/2 system working in the 3-5 micrometers bandpass. It consisted of two aspheric mirrors, one aspheric lens, and two spherical lenses.

关键词： Mirrors Aspheric lenses optical alignment Aspheric optics Combined lens-mirror systems optical engineering Infrared imaging Infrared radiation optical design Spherical lenses

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optical tiling for wide field-of-view head-mounted displays

Optical tiling for wide field-of-view head-mounted displays

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

作者： Hoppe, MJ Melzer, JE Kaiser Electroopt Inc Display Syst Engn Dept Carlsbad CA USA

ISBN: (纸本)0819432652

The design of a wide field-of-view head-mounted display (HMD) is very challenging. Unfortunately, traditional design methods produce low-resolution imagery that is unacceptable for some tasks. One method of addressing this challenge is to optically tile several smaller field-of-view displays to form a single, wide field-of-view, high-resolution image. This paper will address design issues specific to optically tiled systems including optical performance, seam placement and binocular rivalry.

关键词： optical tiling head-mounted display HMD wide field-of-view VIM (R) optical collimator

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COMPACT VIDEO-RATE optical SCANNER (CVROS) FOR FINITE CONJUGATE APPLICATIONS 4

COMPACT VIDEO-RATE OPTICAL SCANNER (CVROS) FOR FINITE CONJUG...

引用

Conference on current developments in optical design and optical engineering IV

作者： TAYLOR, WH KOLLMORGEN CORP DIV ELECTROOPTNORTHAMPTONMA 01060

ISBN: (纸本)0819415871

The CVROS scanner, a new approach to high speed serial optical scanning employing a scan disc, has been successfully developed for thermal imaging. Its high speed, high scan efficiency, wide field, and mirror optics suggest applicability to broad band visible scanners and projectors as well as laser and UV printers. This paper reviews the CVROS concept and presents the configuration adaptations required for finite conjugate applications. design and performance characteristics are given for several configurations as well as key alignment and manufacturing requirements.

关键词： Mirrors Scanners Tolerancing Objectives Prisms Manufacturing Sensors Monochromatic aberrations optical alignment optical design

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optical design of high aperture compact relay systems

Optical design of high aperture compact relay systems

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

作者： Nikolov, ID Univ Sofia Opt & Spect Dept BG-1126 Sofia Bulgaria

ISBN: (纸本)0819432652

Some results obtained in the realization of compact relay systems design are presented. Four optical configurations have been analyzed. Two symmetrical schemes were examined having field Smith's lenses for a image scaling of-ix. The achieved numerical aperture is up to 0.35 and the MTFs curves are at 40 cycles1/mm for a contrast ratio of 0.2. The third design has a large field of 40 mm but its F-number is about F/4.5. The last relay system is unsymmetrical. The scaling is 2x and the image field exceeds 50 mm. The aberration balancing results and the optical systems performance are illustrated.

关键词： optical design relay systems high-speed optics wide-angle lenses

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Tolerancing an optical freeform surface: an optical fabricator's perspective 16

Tolerancing an optical freeform surface: an optical fabricat...

引用

Conference on current developments in Lens design and optical engineering XVI

作者： Nelson, Jessica DeGroote Medicus, Kate Frisch, Gregory Optimax Syst Inc Ontario NY 14519 USA

ISBN: (纸本)9781628417449

Freeform optical shapes or optical surfaces that arc designed with non-symmetric features arc gaining popularity with lens designers and optical system integrators. Tolerances on a freeform optical design influence the optical fabrication process. Case studies and soft tolerance limits for easier fabrication will be discussed. This paper will also give a high level overview of a freeform optical fabrication process that includes generation. high speed VIBE polishing, sub-aperture figure correction and testing of freeform surfaces.

关键词： Freeform optics manufacturing tolerance fabrication asphere

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design of a grating spectrometer from a 1: 1 Offner mirror system

Design of a grating spectrometer from a 1: 1 Offner mirror s...

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current developments in optical engineering ii 1987

作者： Kwo, Deborah Lawrence, George Chrisp, Michael Optical Sciences Center University of Arizona TucsonAZ85721 United States Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States

A 1:1 Offner mirror system is modified to work as a grating spectrometer for the infrared by placing a grating on the secondary convex mirror of the system. Slight adjustment of the configuration combined with tilt of the secondary provide the necessary degrees of freedom to correct for astigmatism of the system. Additional control may be Obtained by using a holographic optical element (HOE), constructed to add necessary compensating aberrations. Details of the best configuration and the limitations of performance are presented. © 1987 SPIE. All rights reserved.

关键词： Degrees of freedom (mechanics)

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