A novel concept on the construction of high-resolution objectives is outlined. Although similar to binary optics technology, this approach brings additional degrees of freedom to the opticaldesign as far as achieving...
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ISBN:
(纸本)0819406554
A novel concept on the construction of high-resolution objectives is outlined. Although similar to binary optics technology, this approach brings additional degrees of freedom to the opticaldesign as far as achieving a finer balance of phase curvature via refractive properties and relative thickness of the multilayer stack. The differential coating objective can be used in conjunction with diffractive surfaces to optimize the transmission efficiency and control the secondary spectrum correction. The basic equations describing the monochromatic and three- color achromat predesign are presented.
It has been shown that the Admittance Diagram along with the Quarterwave Rule can be used in the design and characterization of optical thin film coatings. However, this same tool may be utilized in the design and cha...
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ISBN:
(纸本)0819406554
It has been shown that the Admittance Diagram along with the Quarterwave Rule can be used in the design and characterization of optical thin film coatings. However, this same tool may be utilized in the design and characterization of some microwave components as well. A simple design example of a Wilkinson power divider is presented to illustrate the utility of this optical technique for microwave circuit design and analysis.
An application of Fourier transform lenses to surface topography detection is investigated. The field is illuminated in parallel using an array of three different wavelength laser diodes, and relative phase alteration...
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ISBN:
(纸本)0819406554
An application of Fourier transform lenses to surface topography detection is investigated. The field is illuminated in parallel using an array of three different wavelength laser diodes, and relative phase alteration is read out between cross-correlated electronic pixels. Diffraction theory of image formation is used to interpret the modulation in contrast. Speckle sensitivity to wavelength provides the basic technique for noise filtering.
The author proposes a new noise power-spectrum estimation method for mark-dimension fluctuation in optical disks. Diffraction by marks was modeled using Fraunhofer diffraction theory, and mark-dimension fluctuations w...
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ISBN:
(纸本)0819406554
The author proposes a new noise power-spectrum estimation method for mark-dimension fluctuation in optical disks. Diffraction by marks was modeled using Fraunhofer diffraction theory, and mark-dimension fluctuations were taken into account through statistical averaging. The calculated and experimental results agreed well. Fluctuations in the mark edge position mainly contributed to noise.
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.
This paper presents a new idea for the optimization of an initial lens structure type from an optical lens database on the basis of introducing optical lens database (OLDB) and computer- aided opticaldesign (CAOD) sy...
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ISBN:
(纸本)0819406554
This paper presents a new idea for the optimization of an initial lens structure type from an optical lens database on the basis of introducing optical lens database (OLDB) and computer- aided opticaldesign (CAOD) systems. Using image-quality target parameters as conditional search parameters of optimization of initial lens structure type from database, and evaluating selected lens quality with surface relative aperture (h/r), the authors were able to obtain a good effectiveness in practice.
Matrices of optical components (like LEDs, microlenses, microzone plates, microspatial filters) are used in some arrangements to obtain the optical transformation from an area of a frontal plane to a point and vice ve...
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ISBN:
(纸本)0819406554
Matrices of optical components (like LEDs, microlenses, microzone plates, microspatial filters) are used in some arrangements to obtain the optical transformation from an area of a frontal plane to a point and vice versa. By use of these matrices the following arrangement are established: a matrix optical relay-system, a multichannel optoelectronic hybrid computer, an optical system for pattern recognition by spatial multichannel filtering, and uniform illumination system. The established relationships are applied to calculate the positions, the component sizes, and the system performance. Matrix configuration is shown to be advantageous for maximizing the performance for plane-point correlation and, also, for a miniature solution.
The main parts of the imaging spectrometer for observing ocean color (OCM system) are: the scan subsystem, the pre-position telescope, the dispersion element, and the spectrometer which should be determined according ...
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ISBN:
(纸本)0819406554
The main parts of the imaging spectrometer for observing ocean color (OCM system) are: the scan subsystem, the pre-position telescope, the dispersion element, and the spectrometer which should be determined according to the science requirements of ocean color observation and the correspondent specifications of the opticaldesign. The authors analyzed the optical systems of the MODIS-T proposed by NASA/Goddard Space Flight Center and found some problems in them. Based on this the authors designed a reflection-refraction hybrid optical system by autocollimation grating. The results are better than the improved MODIS-T opticaldesign in some points--the minimal optical MTF value of the design at the Niquist frequency is better than 0.96, the construction is much more compact.
A technique which automatically adjusts the optical axis of a CCD image sensor with the lens for a linear CCD image scanner is described. The error of the alignment is measured to the magnitude and pulse-width of the ...
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ISBN:
(纸本)0819406554
A technique which automatically adjusts the optical axis of a CCD image sensor with the lens for a linear CCD image scanner is described. The error of the alignment is measured to the magnitude and pulse-width of the detected signal from the linear CCD image sensor, calculating the value of error by computer and driving the stepping motor to achieve the automatic adjustment.
The theory of nondiffracting beam propagation and experimental evidence for nearly-nondiffractive Bessel beam propagation are reviewed. The experimental results are reinterpreted using simple optics formulas, which sh...
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ISBN:
(纸本)0819406554
The theory of nondiffracting beam propagation and experimental evidence for nearly-nondiffractive Bessel beam propagation are reviewed. The experimental results are reinterpreted using simple optics formulas, which show that the observed propagation distances are characteristic of the optical systems used to generate the beams and do not depend upon the initial beam profiles. A set of simple experiments are described which support this interpretation. It is concluded that nondiffracting Bessel beam propagation has not yet been experimentally demonstrated.
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