An original plastic-lens array molded integrally as one block having a function of forming a unit-magnification erect image has been developed. The lens array consists of eight lens devices. The lens device has a roof...
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ISBN:
(纸本)0819406554
An original plastic-lens array molded integrally as one block having a function of forming a unit-magnification erect image has been developed. The lens array consists of eight lens devices. The lens device has a roof prism, a reflecting v-groove, and a pair of convex-lens surfaces. A prototype of the lens arrays are arranged side by side. Thickness of the lens array is 4.5 mm, distance between object and image planes is 14.4 mm, array pitch is 1.3 mm, and the effective imaging region is 220 mm. The average modulation transfer function (MTF) at 41 p/mm of the lens array is 76% in the row direction (Y-direction) and 80% in the direction (X-direction) normal to Y-direction. The average F/NO in line-scanning is 1.8. The average irradience unevenness in line-scanning is 17%. The focal depth is +/- 0.6 mm in the area with the MTF being 60% or more. With this prototype a high-resolution image was attained. So, the lens arrays can be applied to imaging devices for use in a compact facsimile, image scanner, LED printer, and so on.
High-resolution space-based imaging applications are limited by the difficulty of placing large monolithic mirrors in space and by technology limitations on the diameter achievable in monolithic mirrors. Multiple-mirr...
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ISBN:
(纸本)0819406554
High-resolution space-based imaging applications are limited by the difficulty of placing large monolithic mirrors in space and by technology limitations on the diameter achievable in monolithic mirrors. Multiple-mirror imaging systems can overcome these limitations but require precise alignment-error sensing and correcting schemes to maintain all elements in phase. When a wide field of view is desired, the complexity increases substantially since significant error terms will be a function of field angle. Approaches which can reduce the complexity of the error sensing/correcting schemes are thus of great interest. By sampling selected spatial frequencies, representative of both the individual subapertures and errors between subapertures, measurement of all error terms except absolute piston can be achieved. A technique which places a nonredundant mask in the compacted pupil plane of a phased-array imager and senses the selected spatial-frequency magnitude and phase in the focal plane has been analyzed. This technique can reduce complexity in the local error-sensing system while accounting for all tilt, geometry, magnification, and relative piston errors.
Future high performance miniature optical correlators will require specially designed Fourier Lenses. This paper presents opticaldesign considerations and results for several small, high performance Fourier Lenses. T...
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ISBN:
(纸本)0819406929
Future high performance miniature optical correlators will require specially designed Fourier Lenses. This paper presents opticaldesign considerations and results for several small, high performance Fourier Lenses. These lenses are designed to match up with various spatial light modulators (SLMS) to utilize the full resolution of the SLMS. The miniature designs are compared in size and performance to optics used in the current LMSC Subcompact Hybrid optical Correlator. The results presented illustrate that the high level of performance of our current correlator can be retained and extended in a miniature correlator, and that the size can be dramatically reduced. The new designs are optimized for use with spatial light modulators having various numbers of pixels and pixel spacings.
optical processor design is the art of architecting a computing machine with components that are either currently available or which can be developed with a reasonable extension of current technology. There is no diff...
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ISBN:
(纸本)0819406902
optical processor design is the art of architecting a computing machine with components that are either currently available or which can be developed with a reasonable extension of current technology. There is no difference between this and the design of a processor using any other technology except that in optics the component selection is more limited and the cost of implementing certain classes of operations is far less. This paper outlines the characteristics of many current components and the impact of these characteristics on optical architectures. At the present time the most critical components in optical processing are at the interface with other processing technologies. These critical components are spatial light modulators and photosensors. Advances in semiconductor technology and opto-electronics for optical communications may greatly reduce the current component limitations. In this paper suggestions are provided for new component development and the impact of such developments on optical processing technology is discussed.
In this paper, the optical layout, the application, and the working principle of a large-aperture and long-range moiré interferometer (MI) for the quantitative measurement of flow properties are introduced. The i...
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Two-component zoom systems are a basic part of all zoom systems. The first zoom systems appeared at the end of the 19th century in Germany. Dunouer1 has shown the possibility of the creating two-component zoom convert...
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This conference contains 61 articles on developments in the field of holographic optics. Among the topics covered are: holographic components for optical systems;design, fabrication and performance of kinoforms;comput...
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ISBN:
(纸本)0819406163
This conference contains 61 articles on developments in the field of holographic optics. Among the topics covered are: holographic components for optical systems;design, fabrication and performance of kinoforms;computer-generated holography;optical computing and image processing;holographic optical interconnects;holographic gratings;holographic displays;and holographic interferometry and metrology.
A compact optical communications transceiver breadboard was constructed. In order to keep the mass of the breadboard as low as possible the design was made very simple. The entire package weighs less than 5 kg. The op...
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ISBN:
(纸本)0819405078
A compact optical communications transceiver breadboard was constructed. In order to keep the mass of the breadboard as low as possible the design was made very simple. The entire package weighs less than 5 kg. The optical module uses a 40 mW diode laser and a two-axis voice coil actuator for beam steering. The breadboard is capable of locking onto a laser beacon within its field of view and transmitting the diode laser beam back toward the beacon. design of the breaboard, details of each component in the breadboard, and current experiments with the package are described.
To futher the possibility of making use of optical devices in a more critical environment, it is necessary to carry out a research into the image stabilization theory of reflecting prism in the case of a finite angula...
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Parallel optical interconnects have been well documented. The theory of parallel optical interconnects is the basis for OptiComp's current digital optical computer (DOC II) design and fabrication program. This pap...
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ISBN:
(纸本)0819406910
Parallel optical interconnects have been well documented. The theory of parallel optical interconnects is the basis for OptiComp's current digital optical computer (DOC II) design and fabrication program. This paper demonstrates a natural extension of the parallel theory into global or 3-D theory where a single point is imaged to every other interconnect point. This paper introduces an algorithm for a digital optical computation concept and discusses the hardware architecture for extremely wide word (approximately 128 bits) single clock addition, which is based on global free space optical interconnections. In addition, energy consumption and throughput efficiency of the new adder are examined. The motivational basis for the utilization of global free space optical interconnects is documented in reference 3.
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