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Optical fiber choice, a function of specific application
Selecting a particular optical fiber for a specific application requires not only analysis of parameters affecting the fiber's performance, but also evaluation of advantages and disadvantages of various fiber constructions.
By Gene Anderson, Project Manager, Optical Fiber, Belden Technical Research Center, Geneva, IL.
Shadow enhancement provides 2-D maps with 3-D imagery
To overcome the drawbacks of conventional contour mapping, engineers use a software method of "shaded relief'- or "shadow" mapping, as it is also called, that enables them to turn a 2-D contour map into a 3-D detailed map resembling a satellite image- but that contains information not normally obtainable by satellite sensors.
By M. T. Holroyd, Dataplotting Services Inc., Don Mills, Ontario, Canada.
SPECIAL: Imaging Technology Shows Preview: Systems, Devices
This year's two imaging technology shows-Electronic Imaging '86, Boston, MA and SPSE Conference and Expo on Electronic Imaging, Arlington, VA will feature more than 140 manufacturers of input devices, image processors, storage systems, display terminals, and communications links.
Recording thin-film spectra has its parameters, pitfalls
Of the several optical spectroscopy techniques used for observing the spectra of thin film on metal surfaces, External Reflection Spectroscopy (ERS) has proved to be particularly useful for studying thin films. Certain parameters and pitfalls, however, must be thoroughly considered when using ERS for thin film on smooth metal surfaces.
By N.J. Harrick, President, Harrick Scientific Corp., Ossining, NY.
Hi-res color hardcopy meeting user needs and image quality
Increasing demand for color CRT displays has produced a corresponding demand for fast, low cost, high-quality color hardcopy plotters - to which a number of manufacturers have responded.
By Dale Richmond, Manager, Plotter Marketing, Versatec, a Xerox Co., Santa Clara, CA.
Flat tension-mask yields brighter image with higher contrast
An economical, relatively simple method for constructing flat shadow masks promises 80% higher brightness or 70% greater contrast ratio compared with conventional color CRTs - while also offering a virtually reflection-free viewing screen.
By L. Dietch, K. Palac and W. Chiodi., Zenith Electronic Corp., Glenview, IL.
Fiber optic LAN supports many networks
A digital broadband LAN, using fiber optic technology, provides data transmission rates up to 200 Mbps supporting a number of different local area networks simultaneously.