The techniques used for the analysis of thermally induced structural distortions of optical components such as scanning mirrors and telescope optics are outlined. Particular attention is given to the methodology used ...
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ISBN:
(纸本)0819406554
The techniques used for the analysis of thermally induced structural distortions of optical components such as scanning mirrors and telescope optics are outlined. Particular attention is given to the methodology used in the thermal and structural analysis of the GOES scan mirror, the optical analysis using Zernike coefficients, and the optical system performance evaluation. It is pointed out that the use of Zernike coefficients allows an accurate, effective, and simple linkage between thermal/mechanical effects and the opticaldesign.
Interferometric measurements of real surfaces are combined with computed opticaldesign analyses. To accomplish this, a special software interface driver was developed to accept serial optical Path Difference (OPD) da...
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ISBN:
(纸本)0819402044
Interferometric measurements of real surfaces are combined with computed opticaldesign analyses. To accomplish this, a special software interface driver was developed to accept serial optical Path Difference (OPD) data from a Zygo Mark III interferometer, apply standard algorithms, and convert the measured data into a CODE v readable file. Analysis was conducted on a large aperture developmental optical system containing a fold mirror of eggcrate construction. MTF performance of the entire system was computed as were the contributions of individual surfaces to overall optical quality. Diffraction effects due to the rib structure of the eggcrate mirror were apparent in this analysis, as were the effects of gravity and figure components of the wavefront. This hybrid analysis demonstrates the usefulness of coupling interferometry with an opticaldesign program in the analysis of complex optical systems.
The task of this research project is to define the extent of applicability of such 3D self-manufacture approach to the production of optical fastenings. The resulting lack of equipment, to be used for demonstration of...
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ISBN:
(数字)9781510602861
ISBN:
(纸本)9781510602854;9781510602861
The task of this research project is to define the extent of applicability of such 3D self-manufacture approach to the production of optical fastenings. The resulting lack of equipment, to be used for demonstration of simple experiments, which would be both competitive in performance and cheap to produce, led to the decision to research opportunities for self-manufacturing.
The paper presents a new processing method for design and fabrication of microlens by microfluidic deposition, in which the lenses can be formed on the media with high precise location in the fabrication process. Firs...
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ISBN:
(纸本)0819454613
The paper presents a new processing method for design and fabrication of microlens by microfluidic deposition, in which the lenses can be formed on the media with high precise location in the fabrication process. First we may apply physical vaporization deposition (PvD) or spin coating to fabricate a thin film;secondly, the hydrophilic pattern specified by the mask of lenses can be created by photolithography, where the special lens media is made herein. Finally, the liquid solution of lens material is deposited onto the predetermined location of the lens media by the drop-on-demand fluidic actuator;thus, the microlenses are consequently formed after the complete evaporation of solvent in the solution.
An ultra-fast focal reducer design originally intended for use with spherical primary mirrors (published in opticalengineering, February, 2003), has been adapted for use as a retro-fit for existing telescopes of simi...
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ISBN:
(纸本)0819454613
An ultra-fast focal reducer design originally intended for use with spherical primary mirrors (published in opticalengineering, 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.
A spaceborne telescope has been designed and analyzed for a 2-micron solid state coherent lidar system operating on a satellite. The optical system consists of a large off-axis reflective telescope, a large-aperture d...
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ISBN:
(纸本)0819418994
A spaceborne telescope has been designed and analyzed for a 2-micron solid state coherent lidar system operating on a satellite. The optical system consists of a large off-axis reflective telescope, a large-aperture diffractive scanner, an image derotator and a lag angle compensator. Due to the orbiting motion of the satellite and scanning, the boresight of the telescope shifts during the round trip travel time of the laser pulses to the target. In a coherent lidar system utilizing optical heterodyne detection, the relative alignment of the received signal with respect to the local oscillator beam is particularly critical. Two compensators have been designed to correct the boresight errors as well as the wavefront errors caused by beam wandering due to the boresight changes. Several design approaches for the compensators have been investigated. The optical and optomechanical design issues for such a system are discussed. The results of optical performance, modeling, and tolerance analysis for the telescope are also presented.
A fast (F/1.55) and wide-angle refractive camera objective has been developed to work with a large-size CCD on the focal plane of the spectrograph of Mont Megantique telescope for large spectral coverage from Uv to vI...
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ISBN:
(纸本)0819454613
A fast (F/1.55) and wide-angle refractive camera objective has been developed to work with a large-size CCD on the focal plane of the spectrograph of Mont Megantique telescope for large spectral coverage from Uv to vIS and up to NIR. The novel camera objective has been designed and optimized with three different glass combinations in order to have higher throughputs for large spectral coverage, especially in Uv region. The tolerance analysis of the camera objective is given in the paper. The final opto-mechanical design of the objective is discussed with the consideration of the manufacturing tolerance in the optical and mechanical parts, as given in this paper. The used components have been minimized to reduce the light inherent lost. The optical testing results displayed the good optical performance of the camera with the required resolution for the whole FOv, as predicted by the optical simulation and computation. The broadband AR coating, enhanced on Uv region, have been used on each surface of the lenses in the optical system.
In the past decade, the optical method called moire interferometry has matured rapidly to emerge as an invaluable tool, proved by many industrial and scientific applications. It has been applied to numerous problems i...
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In the past decade, the optical method called moire interferometry has matured rapidly to emerge as an invaluable tool, proved by many industrial and scientific applications. It has been applied to numerous problems in engineering mechanics. It measures in-plane displacement fields with high sensitivity and high spatial resolution. This paper reviews current practices of moire interferometry and its extensions. Applications in diverse fields are addressed to demonstrate the wide applicability of the method, especially the recent applications for thermal deformation analyses of microelectronics devices. Speculation on future developments and practices is presented.
Customized high-contact-angle microlenses are presented for optical wireless communication (OWC) and optical wireless location (OWL) applications. These microlenses are fabricated by way of an electro-dispensing techn...
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ISBN:
(纸本)9780819496911
Customized high-contact-angle microlenses are presented for optical wireless communication (OWC) and optical wireless location (OWL) applications. These microlenses are fabricated by way of an electro-dispensing technique to establish wide field-of-views (FOvs). Each microlens is formed from dispensed Uv-curable polymer with pressure-control defining the microlens volume and a voltage on the metal needle tip defining the microlens shape (by way of electrowetting). Uv curing is then applied. Microlenses with FOvs up to 90 degrees are fabricated for high-density integration above a CMOS imaging sensor for wide-FOv operation in emerging OWC and OWL applications. Both theoretical ray-tracing analyses and experimental imaging results are presented with good agreement.
The control systems of the miniature robots are suggested for their motion over internal surfaces inside of the small diameter tubes. The mechanical system information-measuring sensor and control systems are consider...
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ISBN:
(纸本)0819454613
The control systems of the miniature robots are suggested for their motion over internal surfaces inside of the small diameter tubes. The mechanical system information-measuring sensor and control systems are considered. Three versions of the mechanical systems are suggested: electromagnetic, triad wheels and conversion of rotation motion to translation one. The electromagnetic mechanism use push pull tipe method for translation motion realization. Developed schemes in the modules design of control systems were checked experimentally on the robot's prototypes. Some results of the computer simulation illustrate the multilink robot control motion along the internal diameters of the tubes. This work was fulfilled under financial support of the Russian Found of Fundamental researches N 01-01-00913 and in frames of Federal Multi Purpose Scientific and Technical Program of Ministry of Industry, Science and Technologies: "Researches and developments on priority directions of science and technology", "Knowledgeable basic investigations" block, "Basic investigations at the field of physics sciences" part Mechanics.
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