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

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optical design of wide field of view achromatic phase retarders

Optical design of wide field of view achromatic phase retard...

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current developments in lens design and optical engineering vI

作者： Deslis, Apostolos Ball Aerospace and Technologies Corporation 1600 Commerce Street Boulder CO 80301 United States

In this paper I will describe some of the properties that govern retarders made of uni-axial birefrigent materials, and discuss how to optimize wide field of view superachromatic retarders using commercially available software. To demonstrate the technique, examples of half wave plates are shown, that achieve maximum 0.04 waves of retardance deviation over the wavelength range 300 nm to 1100 nm having a field of view +/-10 degrees.

关键词： Phase modulation

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optical design considerations for the Terrestrial Planet Finder - Coronagraph Mission: optical telescope assembly

Optical design considerations for the Terrestrial Planet Fin...

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current developments in lens design and optical engineering vI

作者： Howard, Joseph M. Mouroulis, Pantazis Thompson, Anita Smith, Andrew Content, David Ho, Timothy Jackson, Clifton Ohl, Raymond G. Shaklan, Stuart B. NASA Goddard Space Flight Center Greenbelt MD NASA Jet Propulsion Laboratory Pasadena CA Swales Aerospace Beltsville MD

The Terrestrial Planet Finder-Coronagraph (TPF-C) is a NASA exploration mission to directly detect and characterize terrestrial exoplanets at visible wavelengths. The TPF-C observatory must be able to distinguish a planet that is more than 10 orders of magnitude fainter than its parent star at a separation of 75 milli-arc-seconds (mas). Coronagraphic detection requires a large aperture telescope to resolve the exoplanet from its star, and extreme stability during detection and characterization observations. This paper discusses the requirements and trade studies leading to the current baseline optical design for the TPF-C telescope. The current baseline design is summarized and its prescription is presented.

关键词： optical design

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Development of new family of wide-angle anamorphic lens with controlled distortion profile

Development of new family of wide-angle anamorphic lens with...

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current developments in lens design and optical engineering vI

作者： Gauvin, Jonny Doucet, Michel Wang, Min Thibault, Simon Blanc, Benjamin INO 2740 Einstein Street Sainte-Foy Que. GIF 4S4 Canada Immervision 2020 University Montreal Que. H3A 2H5 Canada

It is well known that a fish-eye lens produces a circular image of the scene with a particular distortion profile. When using a fish-eye lens with a standard sensor (e.g. 1/3", 1/4",.), only a part of the rectangular detector area is used, leaving many pixels unused. We proposed a new approach to get enhanced resolution for panoramic imaging. In this paper, various arrangements of innovative 180-degree anamorphic wide-angle lens design are considered. Their performances as well as lens manufacturability are also discussed. The concept of the design is to use anamorphic optics to produce elliptical image that maximize pixel resolution in both axis. Furthermore, a non-linear distortion profile is also introduced to enhance spatial resolution for specific field angle. Typical applications such as panoramic photography, video conferencing, and homeland/transportation security are also presented.

关键词： optical instrument lenses

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Automated synthesis of both the topology and numerical parameters for seven patented optical lens systems using genetic programming

Automated synthesis of both the topology and numerical param...

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current developments in lens design and optical engineering vI

作者： Jones, Lee W. Al-Sakran, Sameer H. Koza, John R. Genetic Programming Inc. Mountain View CA 94041 United States Stanford University Stanford CA 94305 United States

This paper describes how genetic programming was used as an automated invention machine to synthesize both the topology and numerical parameters for seven previously patented optical lens systems, including one aspherical system and one issued in the 21st-century. Two of the evolved optical lens systems infringe the claims of the patents and the others are novel solutions that satisfy the design goals stated in the patent. The automatic synthesis was done "from scratch" - that is, without starting from a pre-existing good design and without pre-specifying the number of lenses, the topological layout of the lenses, or the numerical parameters of the lenses. Genetic programming is a form of evolutionary computation used to automatically solve problems. It starts from a high-level statement of what needs to be done and progressively breeds a population of candidate individuals over many generations using the principle of Darwinian natural selection and genetic recombination. The paper describes how genetic programming created eyepieces that duplicated the functionality of seven previously patented lens systems. The seven designs were created in a substantially similar and routine way, suggesting that the use of genetic programming in the automated design of both the topology and numerical parameters for optical lens systems may have widespread utility.

关键词： optical instrument lenses

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A novel method for fabrication of continuous-relief optical elements

A novel method for fabrication of continuous-relief optical ...

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current developments in lens design and optical engineering vI

作者： Guo, Xiaowei Du, Jinglei Chen, Mingyong Ma, Yanqin Zhu, Jianhua Peng, Qinjun Guo, Yongkang Du, Chunlei Department of Physics Sichuan University Chengdu 610064 China Institute of Optics and Electronics Chinese Academy of Sciences Chengdu 610209 China

A novel method for the fabrication of continuous micro-optical components is presented in this paper. It employs a computer controlled spatial-light-modulator (SLM) as a switchable projection mask and silver-halide sensitized gelatin (SHSG) as recording material. By etching SHSG with enzyme solution, the micro-optical components with relief modulation can be generated through special processing procedures. The principles of digital SLM-based lithography and enzyme etching SHSG are discussed in detail, and microlens arrays, micro axicon-lens arrays and gratings with good profile were achieved. This method is simple, cheap and the aberration in processing procedures can be in-situ corrected in the step of designing mask, so it is a practical method to fabricate continuous profile for low-volume production.

关键词： Microoptics

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Using multi-function components to solve optical design challenges for DUv microlithographic applications

Using multi-function components to solve optical design chal...

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current developments in lens design and optical engineering vI

作者： Webb, James E. Corning Tropel Corporation 60 O'Connor Rd Fairport NY 14450 United States

Several small-field catadioptric optical designs have been developed over the last decade to meet the demanding needs from lithographers. design solutions that use a multi-function component can provide nearly perfect wavefront correction for optical systems with broad bandwidth sources, such as free running (un-narrowed) excimer lasers operating at wavelengths below 300 nm, with limited choices of optical materials with high transmission at these wavelengths. From these catadioptric design forms, variations have been developed to accommodate changes in wavelength, increases in the numerical aperture and conversion of the imaging medium from nitrogen to ultra-high purity water and other high index fluids for immersion lithography applications. Some designs also address the need for increased working distance. This paper will discuss the use of multi-function components, the evolution of several design forms, the optical materials required, their benefits for specific applications, and the challenges they have created.

关键词： optical communication

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Integrated optical mode field adapters at the end of single/multimode fibers

Integrated optical mode field adapters at the end of single/...

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current developments in lens design and optical engineering vI

作者： Windel, Th. Fischer, U.H.P. IEEE Harz University of Applied Sciences Friedrichstr. 57 38855 Wernigerode Germany

In this paper we present the fabrication of optical mode field adaptors for fiber optical communications devices in combination with a new method for spot size measurement for single mode optical components. At the end of standard single mode fibers we have manufactured reproducible mode field transformers with diameters from 5 μm to 90 μm. Additionally, we present a new planar optical field characterization method. BPM simulations are performed to predict the spot sizes at different fiber end diameters. Based on the measurement of a singlemode fiber in accordance with ITU Recommendation G.652 the efficiency is demonstrated and discussed.

关键词： Integrated optics

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designing and specifying aspheres for manufacturability

Designing and specifying aspheres for manufacturability

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current developments in lens design and optical engineering vI

作者： Kumler, Jay Coastal Optical Systems Inc. 4480 South Tiffany Drive West Palm Beach FL 33407

New technologies for the fabrication of aspheres have increased opportunities for using aspheres in a wider range of optical systems. If manufacturability is considered early in the optical design process, the short and long term costs of the aspheric surface can be greatly reduced without sacrificing performance. The optical designer must learn how to select optimum materials for aspheres. Using non-staining glasses, higher index glass types, and softer glass types can help reduce production costs. If the optical designer understands what range of aspheric surfaces can be manufactured, they can constrain the aspheric surface during optimization. The steepness of the aspheric departure (the slope of the aspheric departure) often has a larger impact on manufacturing difficulty than the amplitude of the asphere or the steepness of the base radius. Tolerancing can increase the difficulty without measurably improving optical performance. Finally, the asphere can be designed for ease of metrology. Understanding the options that are available for aspheric metrology will allow the engineer to control tooling and fixturing that is required for testing.

关键词： Aspherics

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Aspheric glass lens modeling and machining

Aspheric glass lens modeling and machining

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current developments in lens design and optical engineering vI

作者： Barry Johnson, R. Mandina, Michael SPIE CyberAir Development Corporation 3077-K Leeman Ferry Rd. Huntsville AL 35801 United States Optimax Systems Inc. 6367 Dean Parkway Ontario NY 14519 United States

The incorporation of aspheric lenses in complex lens system can provide significant image quality improvement, reduction of the number of lens elements, smaller size, and lower weight. Recently, it has become practical to manufacture aspheric glass lenses using diamond-grinding methods. The evolution of the manufacturing technology is discussed for a specific aspheric glass lens. When a prototype all-glass lens system (80 mm efl, F/2.5) was fabricated and tested, it was observed that the image quality was significantly less than was predicted by the optical design software. The cause of the degradation was identified as the large aspheric element in the lens. Identification was possible by precision mapping of the spatial coordinates of the lens surface and then transforming this data into an appropriate optical surface defined by derived grid sag data. The resulting optical analysis yielded a modeled image consistent with that observed when testing the prototype lens system in the laboratory. This insight into a localized slope-error problem allowed improvements in the fabrication process to be implemented. The second fabrication attempt, the resulting aspheric lens provided remarkable improvement in the observed image quality, although still falling somewhat short of the desired image quality goal. In parallel with the fabrication enhancement effort, optical modeling of the surface was undertaken to determine how much surface error and error types were allowable to achieve the desired image quality goal. With this knowledge, final improvements were made to the fabrication process. The third prototype lens achieved the goal of optical performance. Rapid development of the aspheric glass lens was made possible by the interactive relationship between the optical designer, diamond-grinding personnel, and the metrology personnel. With rare exceptions, the subsequent production lenses were optical acceptable and afforded reasonable manufacturing costs.

关键词： optical instrument lenses

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Overview of the optical design and Performance of the High Resolution Science Imaging Experiment (HiRISE)

Overview of the Optical Design and Performance of the High R...

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current developments in lens design and optical engineering vI

作者： Gallagher, Dennis Bergstrom, Jim Day, Joe Martin, Bryan Reed, Timothy Spuhler, Peter Streetman, Scott Tommeraasen, Mark Ball Aerospace and Technologies Corp. Boulder CO 80306

The High Resolution Imaging Science Experiment (HiRISE) camera will be launched in August 2005 onboard NASA's Mars Reconnaissance Orbiter (MRO) spacecraft. HiRISE supports the MRO Mission objectives through targeted imaging of nadir and off-nadir sites with high resolution and high signal to noise ratio [a]. The camera employs a 50 cm, f/24 all-reflective optical system and a time delay and integration (TDI) detector assembly to map the surface of Mars from an orbital altitude of ∼ 300 km. The ground resolution of HiRISE will be < 1 meter with a broadband red channel that can image a 6 × 12 km region of Mars into a 20K × 40K pixel image. HiRISE will image the surface of Mars at three different color bands from 0.4 to 1.0 micrometers. In this paper the HiRISE mission and its camera optical design will be presented. Alignment and assembly techniques and test results will show that the HiRISE telescope's on-orbit wave front requirement of < 0.071 wave RMS (@633nm) will be met. The HiRISE cross track field is 1.14 degrees with IFOv 1.0 μ-radians.

关键词： Cameras

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