By Topic

IBM Journal of Research and Development

Issue 2 • Date March 1969

Filter Results

Displaying Results 1 - 16 of 16
  • The Kinoform: A New Wavefront Reconstruction Device

    Publication Year: 1969, Page(s):150 - 155
    Cited by:  Papers (25)  |  Patents (30)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (475 KB)

    A new, computer-generated, optical element called a kinoform is described. This device operates only on the phase of an incident wave and forms a single image by wavefront reconstruction without the unwanted diffraction orders characteristic of holograms. The kinoform is also more efficient in the use of spatial frequency potential and reconstruction energy and can be synthesized in considerably l... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Associative Holographic Memories

    Publication Year: 1969, Page(s):156 - 159
    Cited by:  Papers (18)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (359 KB)

    Recently Longuet-Higgins modeled a temporal analogue of the property of holograms that allows a complete image to be constructed from only a portion of the hologram. In the present paper a more general analogue is discussed and two two-step transformations that imitate the recording-reconstruction sequence in holography are presented. The first transformation models the recall of an entire sequenc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Computer-generated Binary Holograms

    Publication Year: 1969, Page(s):160 - 168
    Cited by:  Papers (16)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (695 KB)

    Holograms synthesized by computer are used for constructing optical wavefronts from numerically specified objects. Elimination of the need for a physical object has made new applications possible, for example, three-dimensional computer output displays, synthetic prototypes for interferometric testing, and filters for various optical data processing operations. Our computer holograms differ from a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electron Beam Writing of Spatial Filters

    Publication Year: 1969, Page(s):169 - 171
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    A method is described for the generation of optical spatial filters using electron beam-addressed crystals of KDP. Some examples of simple filters which have been successfully written by this method are presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Graphic Computer-assisted Design of Optical Filters

    Publication Year: 1969, Page(s):172 - 178
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (527 KB)

    An interactive graphic system is described in which a designer using a light pen creates an optical filter design at an IBM 2250 Graphic Console controlled by an IBM 1130 computer. The designer can observe the reflectivity (or some other property) of the filter as a function of wave number plotted on the CRT. The application was developed using an experimental graphic version of the 1130 Continuou... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Switchable Total Internal Reflection Light Deflector

    Publication Year: 1969, Page(s):179 - 183
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (386 KB)

    A new digital light deflector, capable of being switched in less than 35 µsec with less than 300 V, uses the principle of switchable total internal reflection. The deflector produces high-quality, high-contrast images and its low cost and high light transmittance make it potentially well suited for use in optical-beam-addressable memory systems as well as for other applications in which ran... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficiencies and Bandwidths of Intracavity Acousto-optic Devices

    Publication Year: 1969, Page(s):184 - 191
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (617 KB)

    Acousto-optic devices based on isotropic and anisotropic acoustic Bragg diffraction will be discussed in terms of their efficiency and bandwidth. The conflicting requirements on the width W of the acoustic column with regard to efficiency and bandwidth determine the basic limitations of the devices. A scheme using the acousto-optic devices within a flat-field conjugate (FFC) angularly degenerate l... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High Performance Reduction Lenses for Microelectronic Circuit Fabrication

    Publication Year: 1969, Page(s):192 - 196
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    Data are presented for three families of objective lenses useful in making high resolution plates and improving the process of photoresist exposure. These lenses have 7 to 10 elements each, spherical surfaces only, and were designed with the aid of computers. Many of the lenses have been fabricated and these have confirmed the soundness of the design methods, assessment criteria, and manufacturing... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Mechanisms of Stress Relief in Polycrystalline Films

    Publication Year: 1969, Page(s):197 - 204
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (498 KB)

    The stress required to operate dislocation sources within a grain, at a grain boundary, and at surfaces is found to be larger than the intrinsic stresses observed in polycrystalline films. It is therefore unlikely that a dislocation flow mechanism can relieve stresses in films. Grain boundary sliding and diffusional creep can, however, relieve stresses in films and equations describing the kinetic... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effects of Bending Stiffness in Magnetic Tape

    Publication Year: 1969, Page(s):205 - 208
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    The elasticity of magnetic tape is an important factor in determining the shape of a tape loaded over a magnetic head. Over a single apex the radius of curvature of the tape is inversely proportional to the wrap angle and to the square root of the ratio of tape tension to bending stiffness. If a constant-pressure support is assumed instead of a knife edge, the radius of curvature increases conside... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Symbolic Polynomial Operations with APL

    Publication Year: 1969, Page(s):209 - 211
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (318 KB)

    A recursive calculation of polynomial coefficients is used to demonstrate how functions performing polynomial algebra and differentiation may be written concisely in Iverson notation and executed by an on-line, time-sharing implementation of APL. These functions will operate on symbolic polynomials with constant coefficients and display in a superscripted format results having up to 116 variables. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the Measurement of Impurity Atom Distributions by the Differential Capacitance Technique [Letter to the Editor]

    Publication Year: 1969, Page(s):212 - 214
    Cited by:  Papers (31)
    IEEE is not the copyright holder of this material | PDF file iconPDF (307 KB)
    Freely Available from IEEE
  • Recent Papers by IBM authors

    Publication Year: 1969, Page(s):215 - 218
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (330 KB)

    Reprints of the papers listed here may usually be obtained most efficiently by writing directly to the authors. The authors' IBM divisions and locations are identified as follows: ASDD is the Advanced Systems Development Division; CD, Components Division; DPD, Data Processing Division; FSD, Federal Systems Division; RES, Research Division; SDD, Systems Development Division and SMD, Systems Manufac... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Patents Recently Issued to IBM Inventors

    Publication Year: 1969, Page(s):219 - 220
    IEEE is not the copyright holder of this material | PDF file iconPDF (278 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1969, Page(s):221 - 223
    IEEE is not the copyright holder of this material | PDF file iconPDF (323 KB)
    Freely Available from IEEE
  • Contents of previous two issues

    Publication Year: 1969, Page(s): 224
    IEEE is not the copyright holder of this material | PDF file iconPDF (149 KB)
    Freely Available from IEEE

Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

Learn about subscribing to this journal >

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center