In order to produce an instrument or sensor design in the face of demanding environmental constraints of a spaceborne system, an integrated approach to sensor design has been developed that incorporates design tools f...
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ISBN:
(纸本)0819441554
In order to produce an instrument or sensor design in the face of demanding environmental constraints of a spaceborne system, an integrated approach to sensor design has been developed that incorporates design tools for: opticaldesign, mechanical design, structural, stray light and thermal analysis. This integrated approach can be extended to the entire payload design and its increased constraints.
Apparatus for accuracy measuring 3.39 μm laser beam divergence is introduced in this article, which principle is based on the interference phenomena of polarized beams in crystal.
ISBN:
(纸本)0819409251
Apparatus for accuracy measuring 3.39 μm laser beam divergence is introduced in this article, which principle is based on the interference phenomena of polarized beams in crystal.
The chronological events associated with fabricating a lens system from initial design to final component manufacturing will be explored. The benefits of utilizing computer integration in design, process planning and ...
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ISBN:
(纸本)0819402044
The chronological events associated with fabricating a lens system from initial design to final component manufacturing will be explored. The benefits of utilizing computer integration in design, process planning and manufacturing will be highlighted.
design examples are given for imaging spectrometer systems operating in the solar reflected spectrum. design considerations and procedures are outlined for incoherently and coherently coupled systems. The case of a pa...
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ISBN:
(纸本)0819450464
design examples are given for imaging spectrometer systems operating in the solar reflected spectrum. design considerations and procedures are outlined for incoherently and coherently coupled systems. The case of a partially coupled system is also examined and it is shown why it is generally to be avoided.
A new simple method for on-line rapid testing of the optical transfer function (OTF) of camera lenses has been developed, in which the digital fast Fourier transform method is employed with using a linear array CCD fo...
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We present a purely mechanical means of producing highly concentric spherical lenses at the endfaces of optical fibers. The production process has two stages. First, conical lenses are produced in a grinding process t...
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We present a purely mechanical means of producing highly concentric spherical lenses at the endfaces of optical fibers. The production process has two stages. First, conical lenses are produced in a grinding process that ensures excellent concentricity. Then, the conical lenses are transformed to spherical lenses using a novel process called loose abrasive blasting. The cone grinding is carried out on a microgrinding machine, which has a sophisticated control system that enables the production of precision conical lenses. The blasting is carried out on a diamond blasting machine. Plots showing automatic centering performance of the microgrinding machine and scanning electron microscopy images of the conical and spherical lenses are presented. (c) 2005 Society of Photo-optical Instrumentation Engineers.
The 60-cm diameter, f/2 DCWS telescope is a modified Ritchey Chrétein configuration which collects radiation in three spectral bands, 0.4 to 0.9 μm (visible), 5.0 to 9.0 μm (MWIR) and 9.0 to 12.0 μm (LWIR). Th...
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In this paper we describe the design of a reflective / diffractive hybrid optical system, which features no obscuration, re-imagining system with 100% cold shield efficiency, 4 degrees of field of view, near diffracti...
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ISBN:
(纸本)0819428841
In this paper we describe the design of a reflective / diffractive hybrid optical system, which features no obscuration, re-imagining system with 100% cold shield efficiency, 4 degrees of field of view, near diffraction limited imaging quality, and working in the long wavelength infrared (LWIR) region of 8-12 microns.
Most imaging systems today include a mosaic detector array in the focal plane. opticaldesigners of astronomical telescopes typically produce a design that yields a superb on-axis aerial image in the focal plane, and ...
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Most imaging systems today include a mosaic detector array in the focal plane. opticaldesigners of astronomical telescopes typically produce a design that yields a superb on-axis aerial image in the focal plane, and detector effects are included only in the analysis of the final system performance. Aplanatic opticaldesigns (corrected for spherical aberration and coma) are widely considered to be superior to nonaplanatic designs. However, there is little merit in an aplanatic design for wide-field applications because one needs to optimize some field-weighted-average measure of resolution over the desired operational field of view (OFOV). Furthermore, when used with a mosaic detector array in the focal plane, detector effects eliminate the advantage of the aplanatic design even at small field angles. For wide fields of view, the focal plane is frequently despaced to balance field curvature with defocus thus obtaining better overall performance. We will demonstrate that including detector effects in the opticaldesign process results in a different optimal (nonaplanatic) design for each OFOV that is even superior to an optimally despaced aplanatic design. (c) 2006 Society of Photo-optical Instrumentation Engineers.
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