An overview of optical systems utilized in JPL's optical Communications research is provided here. These include discussions on the flight terminal optics, the ground receiver aperture and the uplink beacon or com...
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ISBN:
(纸本)0819450464
An overview of optical systems utilized in JPL's optical Communications research is provided here. These include discussions on the flight terminal optics, the ground receiver aperture and the uplink beacon or command optical system. On-going efforts on these and beam-coupling techniques will be described.
Hinds Instruments has provided photoelastic modulators (PEMs) to the photonics industry for over 40 years. In the past Bob Wang, et al. from Hinds have made two presentations(,1,2) at SPIE meetings, Basic optical Prop...
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ISBN:
(纸本)9780819492036
Hinds Instruments has provided photoelastic modulators (PEMs) to the photonics industry for over 40 years. In the past Bob Wang, et al. from Hinds have made two presentations(,1,2) at SPIE meetings, Basic optical Properties of the Photoelastic Modulator Part I: Useful Aperture and Acceptance Angle and Part ii: Residual Birefringence in the optical Element. This presentation, Part iiI in the series, addresses the characteristics of the PEM that vary with temperature, highlighting effects on frequency and signal drift due to retardation changes. In addition, Part iiI will introduce a new PEM with advanced thermal control (PEM-ATC (TM)). Data is presented that shows the increased stability of the PEM frequency and retardation signal using this new device.
A zoom objective lens for a multi-layer optical recording has been designed. A newly proposed optical power arrangement enables varying back focal length while focal length invariant by a linear movement of single zoo...
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ISBN:
(纸本)9780819492036
A zoom objective lens for a multi-layer optical recording has been designed. A newly proposed optical power arrangement enables varying back focal length while focal length invariant by a linear movement of single zooming component. The zoom lens is implemented into multi-layer and multi-bit holographic recording system employing 405 nm blue lasers.
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.
A testing program was conducted to determine the long term temporal stability properties of sheet Invar. The tests were conducted at the University of Arizona's optical Sciences Center over a period of 9 months. G...
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ISBN:
(纸本)0819409251
A testing program was conducted to determine the long term temporal stability properties of sheet Invar. The tests were conducted at the University of Arizona's optical Sciences Center over a period of 9 months. Growth measurements were made using an interferometric optical technique at both ambient and elevated temperatures. Eleven specimen types, in groups of three, were included in the test. These data were combined with published historical data to establish an estimate to the long term behavior. It was found that Invar exhibits short term behavior with a rapid initial growth rate, 8 - 12 ppm/yr and time constant on the order of 100 days plus long term exponential growth at lower growth rates, 2 - 5 ppm/yr initial (end of year 1) with a three to eight year time constant. The parameters which most significantly effect Invar growth rate were found to be: time since final heat treatment; carbon content; heat treatment; and, ambient temperature.
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.
It is well known and described in any geometrical optics textbook that the axial as well as the magnification chromatic aberration may be corrected in a system formed by a pair of thin lenses separated by a certain di...
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ISBN:
(纸本)0819415871
It is well known and described in any geometrical optics textbook that the axial as well as the magnification chromatic aberration may be corrected in a system formed by a pair of thin lenses separated by a certain distance, using only one type of glass. However, it is not so well known that these aberrations may be also corrected in a single thick lens.
This paper discusses some methodologies that apply to the opticaldesign of reflective wide-field cameras. Among the methods considered are off-axis and eccentric pupil systems, concatenation of systems, tilted compon...
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ISBN:
(纸本)9780819472809
This paper discusses some methodologies that apply to the opticaldesign of reflective wide-field cameras. Among the methods considered are off-axis and eccentric pupil systems, concatenation of systems, tilted component systems, aberration theory, and confocal systems. The goal of the paper is to review design methods. In particular some systems are shown to illustrate two methodologies.
After a generation of writing and improving lens design software, it is time to assess where we are. Specifically, can a modern program compete with, or surpass, the best human designers? Here we describe a friendly c...
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ISBN:
(纸本)9780819496911
After a generation of writing and improving lens design software, it is time to assess where we are. Specifically, can a modern program compete with, or surpass, the best human designers? Here we describe a friendly contest between two leaders in the field.
This paper introduced a new type of tenses with approximate bite lecentricityfor *** has the quasi-diffraction Limited image quality inthe range of large field size and keeps fine overlay accuracy as ***corrections of...
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ISBN:
(纸本)0819403954
This paper introduced a new type of tenses with approximate bite lecentricity
for *** has the quasi-diffraction Limited image quality in
the range of large field size and keeps fine overlay accuracy as ***
corrections of sagittal aberrations and higher order aberrations are considered
in the opticaldesign. Finaty, the MTF of two results, with NAO•2,
magnification x, field diameter 140mm, and NAO•28, magnification lOX, field
diameter 140mm, were given.
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