Optical Configurations For Oceanographic Applications Of Eholography

• doi: 10.1109/OCEANSE.2005.1513232
• title: Optical configurations for oceanographic applications of eHolography
• publisher: IEEE
• isbn: 0-7803-9103-9
• issn:
• partnum: 05EX1042
• rank: 3193
• access_type: LOCKED
• content_type: Conferences
• abstract: eHolography (electronic or digital holography) has been used for observing and measuring particle size and distribution in biomedicine, sedimentology and oceanology. In these areas, eHolography possesses advantages over other imaging techniques in terms of its capability for recording live organisms (e.g. plankton) or events (e.g. sediment erosion) in a non-disturbed environment. Compared with classical holography, an eHoIogram is recorded digitally on an electronic imaging sensor and reconstructed numerically, to produce a three-dimensional map of the scene. In this paper, we present our progress in developing an electronic Holographic Camera for high-resolution imaging, both subsea and in air (eHoloCam). Many optical configurations have been successfully used in classical (photographic) holography, including a back-illuminating inline beam with and without a separated reference beam, and side/front illuminated object with an off-axis reference beam. For eHolography, it is necessary to reexamine these and other optical geometries with specific reference to the constraints of reduced resolution and recording area of current CCD or CMOS imaging sensors. For example, using a divergent beam in recording back-illuminated in-line eHolograms can give an improvement in image resolution over the more usual collimated beam geometry. Furthermore, when using an off-axis beam in eHolography considerable limitations are encountered in obtaining useable holograms, such as the need to record at small reference beam angles. In this paper, we will discuss the various geometries we have used to overcome these difficulties.
• article_number: 1513232
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1513232
• html_url: https://ieeexplore.ieee.org/document/1513232/
• abstract_url: https://ieeexplore.ieee.org/document/1513232/
• publication_title: Europe Oceans 2005
• conference_location: Brest, France
• conference_dates: 20-23 June 2005
• publication_number: 10104
• is_number: 32403
• publication_year: 2005
• publication_date: 20-23 June 2005
• start_page: 1214
• end_page: 1219 Vol. 2
• citing_paper_count: 1
• citing_patent_count: 0
• download_count: 68
• insert_date: 20051003
• index_terms:
  • ieee_terms:
    • Optical recording
    • Biomedical optical imaging
    • Holography
    • Holographic optical components
    • Optical sensors
    • Optical imaging
    • Biomedical imaging
    • High-resolution imaging
    • Geometrical optics
    • Image resolution
  • dynamic_index_terms:
    • Image Sensor
    • Camera Sensor
    • Beam Angle
    • Collimated Beam
    • Collimated Light
    • Beam Divergence
    • Sensor Area
    • Reference Beam
    • Small Beam
    • Sediment Erosion
    • Oceanology
    • Upper Limit
    • Sample Volume
    • Numerical Aperture
    • Reconstruction Algorithm
    • Object Distance
    • Pixel Spacing
    • Object Volume
    • Object Intensity
    • Illumination Beam
• isbn_formats:
  • format: Print ISBN, value: 0-7803-9103-9, isbnType: Historical
• authors:
  • Author Name: J. Watson
    Affiliation: Dept of Engineering, University of Aberdeen, Aberdeen, UK
    Author URL: https://ieeexplore.ieee.org/author/37385793900
    ID: 37385793900
    Order: 1
    Author Affiliations:
    • Dept of Engineering, University of Aberdeen, Aberdeen, UK
  • Author Name: H. Sun
    Affiliation: Dept of Engineering, University of Aberdeen, Aberdeen, UK
    Author URL: https://ieeexplore.ieee.org/author/37420690200
    ID: 37420690200
    Order: 2
    Author Affiliations:
    • Dept of Engineering, University of Aberdeen, Aberdeen, UK
  • Author Name: D.C. Hendry
    Affiliation: Dept of Engineering, University of Aberdeen, Aberdeen, UK
    Author URL: https://ieeexplore.ieee.org/author/37348443900
    ID: 37348443900
    Order: 3
    Author Affiliations:
    • Dept of Engineering, University of Aberdeen, Aberdeen, UK
  • Author Name: M.A. Player
    Affiliation: Dept of Engineering, University of Aberdeen, Aberdeen, UK
    Author URL: https://ieeexplore.ieee.org/author/37063996600
    ID: 37063996600
    Order: 4
    Author Affiliations:
    • Dept of Engineering, University of Aberdeen, Aberdeen, UK

Image Sensor

• sensor_type: CMOS
• resolution: not specified
• dynamic_range: not specified
• pixel_size: 5-10 µm
• dark_current: not specified

Optical Data

• focal_length: not specified
• aperture: not specified
• field_of_view: not specified
• distortion: not specified

Performance Metrics

Applications & Benefits

• cell_imaging: not specified
• benefits: eHolography enables rapid capture and storage of images, compact and rugged system configurations, ability to record holographic video of moving objects, no specialist reconstruction facility needed, reconstruction algorithms improve image quality.

Supporting Organizations

• supported_by: UK DTUEPSRC, collaborators in CDL, Aberdeen and Elforlight, Daventry

Manuscript Details

• publication_date: 20-23 June 2005

Relevancy Score

• score: 8
• missing_fields:
  • fill factor
  • quantum efficiency
  • readout speed
  • noise sources
  • analog-to-digital conversion techniques
  • microlenses
  • on-chip colour filters
  • global or rolling shutters
  • backside illumination

Processed JSON Filename

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