1991 Third International Conference on Holographic Systems, Components and Applications

16-18 Sept. 1991

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Displaying Results 1 - 25 of 52
  • The recording and replay of true edge-lit holograms

    Publication Year: 1991, Page(s):8 - 11
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (254 KB)

    The concept of holograms lit from their edge is not new. Schemes proposed by Benton, Caulfield and later Soviet workers have revived an interest in this topic primarily because of the convenience and applicability of this type of display. The present authors examine the rigorous basis of the problem and propose an alternative strategy to those of current interest: that the serial-parallel conflict... View full abstract»

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  • Investigations on fiber optic holographic display techniques

    Publication Year: 1991, Page(s):12 - 15
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (233 KB)

    The authors have described various techniques investigated for the recording of different white-light display holograms by employing flexible fiber optic beam delivery systems. The advantage of flexibility offered by optical fibers is gainfully exploited for overcoming several practical difficulties which are normally encountered in the conventional methods. Methods for recording inbuilt reference... View full abstract»

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  • Electronic 3-D imaging

    Publication Year: 1991, Page(s):16 - 19
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (243 KB)

    It is possible to record, transmit and playback 3-D images electronically. The approach taken is to record the images digitally, process them using a small computer and output the final image to a printer. When overlaid with a screen, a 3-D image may be observed. The entire process is possible using fairly non-specialised equipment: video cameras, personal computer and office laser printers. It ha... View full abstract»

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  • Holographic television by liquid crystal device

    Publication Year: 1991, Page(s):20 - 23
    Cited by:  Patents (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (154 KB)

    The authors make the holographic fringe pattern for moving object on TV camera, transform the hologram pattern to electrical signal and transmit it within the TV frequency band, then display the hologram fringe pattern on the liquid crystal device (LCD) and reconstruct the 3-D image. The characteristics of this system are considered. The possibility of holographic television is examined.<<ET... View full abstract»

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  • Self-developing materials for holographic recording

    Publication Year: 1991, Page(s):24 - 29
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    The authors reports on a new photopolymerizable formulation which suppresses in part, if not completely, some 'intrinsic' deficiencies. The most attractive feature of this material is its 'self-developing character', i.e. its ability to record holograms elements by a single-step photochemical process: a permanent record is obtained directly through imagewise exposure of the sensitive layer to the ... View full abstract»

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  • Novel methods for the processing of silver halides for holography

    Publication Year: 1991, Page(s):30 - 34
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (391 KB)

    The authors discuss new topical areas which provide novel insights into the mechanism of bleaching and also example a new way of noise masking which owes its origins to early Soviet work in the field of reflection holography.<<ETX>> View full abstract»

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  • Bacteriorhodopsin and its genetic variants as media for dynamic holographic information processing

    Publication Year: 1991, Page(s):35 - 39
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (319 KB)

    The authors demonstrated that holographic films produced from the bacteriorhodopsin-variant BR/sub D96N/ have advantageous properties compared to BR/sub WT/ films. The films have been successfully tested in a number of holographic applications. Examples from polarisation sensitive Fourier holography, real-time time-averaging interferometry and pattern recognition are presented.<<ETX>> View full abstract»

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  • A nearest neighbour spatially invariant reflection interconnect in dichromated gelatin

    Publication Year: 1991, Page(s):40 - 44
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (303 KB)

    The authors report on the production and performance of a holographic nearest neighbour interconnect (NNI) recorded in dichromated gelatin (DCG). The interconnect is for use in a demonstration optical processor, discussed by A.C. Walker et al. (1991), and as such is designed for operation at a wavelength of 1.064 mu m.<<ETX>> View full abstract»

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  • Optimal design of high efficiency optical interconnection system with a simulated annealing algorithm

    Publication Year: 1991, Page(s):45 - 49
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (269 KB)

    The simulated annealing algorithm (SA) is used to solve a complex optimization problem. The algorithm can find the state which is the global energy minimum. By applying the SA algorithm the optical general interconnection for N input and output array can be achieved by two binary phase masks each with N*N parameters. This greatly simplifies the optical system and makes the proposed system feasible... View full abstract»

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  • Contact printing of on-axis computer-generated hologram on silver halide emulsion

    Publication Year: 1991, Page(s):50 - 51
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (166 KB)

    The use of silver halide as a material for noninterferometric recording of computer-generated holograms is investigated. It is shown that outstanding fidelity can be achieved by means of contact printing, using a properly designed binary mask. The success is attributed to the observation that a remarkably flat phase profile across each cell of the binary CGH pattern can be achieved despite the une... View full abstract»

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  • Computer generated holograms directly etched in glass and their use as boards interconnects means

    Publication Year: 1991, Page(s):52 - 56
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (327 KB)

    The work on computer generated holograms (CGHs) reported is split into two sections closely correlated: theoretical studies based on the electromagnetic theory, and experimental results from the HOE up to its integration for clock distribution at the backplane level-in a rack.<<ETX>> View full abstract»

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  • Computer generated microlens arrays and their application to optical free space switching networks

    Publication Year: 1991, Page(s):57 - 61
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    The application of microlens arrays into optical switching architectures has been addressed. The diffractive and refractive properties of microlens arrays have been demonstrated in their use as efficient optical fan-in/fan-out array generators in the Fourier and image plane respectively. A flexible and scalable approach to the generation of these lens arrays of high quality and uniformity has been... View full abstract»

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  • Design, analysis and realization of holo-lens imaging systems for speckle metrology

    Publication Year: 1991, Page(s):62 - 65
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (250 KB)

    The authors present the design and analysis of two element high f-number holo-lens imaging system and four element low f-number holo-lens imaging system for speckle metrology. The experimental results of the measurement of in-plane translation and inplane rotation using speckle photography and both the imaging systems (i.e. high f-number and low f-number holo-lens imaging systems) are also present... View full abstract»

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  • Measurement of temperature using speckle shearing interferometry

    Publication Year: 1991, Page(s):66 - 68
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (122 KB)

    Detailed experimental studies on gas phase temperature measurement using speckle shearing interferometry is presented. The experimental results are compared with the data obtained by thermocouple and laser speckle photographic technique.<<ETX>> View full abstract»

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  • Absolute optical contouring

    Publication Year: 1991, Page(s):69 - 72
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (194 KB)

    The authors describe a method which represents a development of several optical contouring techniques. The authors choose to call it absolute contouring. By absolute range is meant the distance from the hologram or camera to a point in the field; as opposed to the distance between one contour fringe and the next. Absolute contouring is effected in real time by varying the contour depth of a system... View full abstract»

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  • Critical slowing down in four wave mixing

    Publication Year: 1991, Page(s):73 - 77
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (265 KB)

    The prediction of a critical slowing down effect in four wave mixing has been made which leads to the concept of a constant gain-bandwidth product for four wave mixing. The effects have been observed in the photorefractive material BTO, and the experimental anomalies have been accounted for. These effects have also been demonstrated experimentally in a phase conjugate resonator.<> View full abstract»

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  • Optical phase conjugation via SBS in magnetoactive semiconductors in the 10.6 micron regime

    Publication Year: 1991, Page(s):78 - 81
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (399 KB)

    The authors' work deals with the analytical investigation of OPC-SBS in a Brillouin cell containing a semiconducting crystal, under a pump intensity dependent absorption regime. For a Brillouin cell of micron size, the waveguide structure has been replaced by a simple plane wave formalism. In order to examine critically the dependence of the reflectivity coefficient on the material parameters, the... View full abstract»

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  • Volume transmission gratings in dichromated gelatin for near infra red applications

    Publication Year: 1991, Page(s):83 - 87
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    It is possible to increase the dispersion of a volume transmission grating by using a double pass through the device. The extension of this technology to achieve integrated devices is discussed. The importance of the control of the dichromated gelatin film parameters, in order to achieve high efficiency and polarisation insensitivity, is outlined. Preliminary results for 1050 l/mm gratings are pre... View full abstract»

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  • A compact, low-dispersion viewing system for reflection holograms

    Publication Year: 1991
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (83 KB)

    A viewing system is proposed for viewing reflection holograms conveniently, and with acceptably low chromatic dispersion. The angles of reconstruction and viewing are such that close examination of the image is possible.<<ETX>> View full abstract»

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  • Computer originated holographic optical elements

    Publication Year: 1991, Page(s):88 - 92
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (334 KB)

    The authors' development and production of holographic optical elements (HOE) combines lens-design, computer generated holograms (CGH), and dichromated gelatin (DCG) as recording material to obtain flexible holograms with high efficiency for industrial applications. The compensation of aberrations by means of a CGH was an important goal of a test run performed covering the formal design of a holog... View full abstract»

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  • Theory of digital holography

    Publication Year: 1991, Page(s):93 - 98
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (421 KB)

    Digital holography is considered as that part of diffractive optics which treats the theoretical analysis, calculation, and fabrication of thin diffractive elements. The coding theory allows the derivation of upper bounds of the diffraction efficiency of these elements.<<ETX>> View full abstract»

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  • Rigorous modal theory for perfectly conducting lamellar gratings

    Publication Year: 1991, Page(s):99 - 102
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (263 KB)

    Planar-integrated digital optical systems require reflection-type array generators. A modal algorithm is developed for perfectly conducting Dammann gratings. The method is first applied to the analysis of the scalar-theoretic designs in local resonance domain. Reflective resonance domain Dammann gratings with 100% diffraction efficiency are then designed, and their sensitivity to errors in fabrica... View full abstract»

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  • TIR holography revisited by coupled wave theory

    Publication Year: 1991, Page(s):103 - 107
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    A coupled wave model is presented to describe the diffraction behavior of thick Total-Internal Reflection (TIR) holograms. The authors have used a transfer matrix formalism to solve the coupled wave equations, enabling a general treatment of the boundary conditions. The off-Bragg characteristics of TIR holograms are completely different from the well known sinc curve of normal transmission grating... View full abstract»

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  • Comparison of three wave mixing in photorefractive and nematic liquid crystals

    Publication Year: 1991, Page(s):108 - 112
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (327 KB)

    Consideration of the coupled wave equations governing three wave mixing in photorefractives and nematic liquid crystals, when both are exhibiting a local response, shows that the main difference between the two is the self phase modulation that occurs in the liquid crystals. It is this difference that explains the dissimilar variation of the exponential gain factor, as a function of inter-beam ang... View full abstract»

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  • Optical cosine transform using phase conjugation technique

    Publication Year: 1991, Page(s):113 - 117
    Cited by:  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (294 KB)

    An optical cosine transform system is designed using computer generated holograms and a phase-conjugate mirror which can provide segmented transform images fulfilling the specification laid down by the CCITT H.261 recommendation on Video Audiovisual Services. The system is evaluated using computer simulations.<<ETX>> View full abstract»

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