Contact Imaging Simulation And Experiment

• doi: 10.1109/TCSI.2007.902409
• title: Contact Imaging: Simulation and Experiment
• publisher: IEEE
• isbn:
• issn: 1558-0806
• rank: 1998
• access_type: LOCKED
• content_type: Journals
• abstract: We report simulated and experimental image quality for contact imaging, a method for imaging objects close to the sensor surface without intervening optics. This technique preserves microscale resolution for applications that can not tolerate the size or weight of conventional optical elements. In order to assess image quality, we investigated the spatial resolution of contact imaging, which depends on the sensor size as well as the distance between objects and the sensor surface. We studied how this distance affects image quality using a commercial optical simulator. Simulation results show that the image quality degrades as objects move away from the sensor surface. To experimentally validate these results, an image sensor was designed and fabricated in a commercially available three metal, two poly, 0.5 mum CMOS technology. Experiments with the contact imager corroborate the simulation results. Two specific applications of contact imaging are demonstrated.
• article_number: 4282078
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4282078
• html_url: https://ieeexplore.ieee.org/document/4282078/
• abstract_url: https://ieeexplore.ieee.org/document/4282078/
• publication_title: IEEE Transactions on Circuits and Systems I: Regular Papers
• conference_location:
• conference_dates:
• publication_number: 8919
• is_number: 4282065
• publication_year: 2007
• publication_date: Aug. 2007
• start_page: 1698
• end_page: 1710
• citing_paper_count: 49
• citing_patent_count: 139
• download_count: 824
• insert_date: 20070730
• index_terms:
  • ieee_terms:
    • Optical imaging
    • Optical sensors
    • Biomedical optical imaging
    • Image sensors
    • Sensor arrays
    • Optical films
    • Image quality
    • Image resolution
    • Optical arrays
    • Biomedical imaging
  • author_terms:
    • CMOS analog integrated circuits
    • contact imaging
    • geometrical optics
    • image resolution
    • image sensors
    • mixed signal analog–digital integrated circuits
  • dynamic_index_terms:
    • Spatial Resolution
    • Simulation Results
    • Image Quality
    • Image Resolution
    • Image Sensor
    • Camera Sensor
    • Simulated Images
    • Sensor Surface
    • Optical Elements
    • CMOS Technology
    • Sensor Size
    • Commercial Simulation
    • Optical Simulation
    • Imaging System
    • Light Source
    • Pixel Size
    • Distance Function
    • Image Plane
    • Shape Parameter
    • Finite-dimensional
    • Infinite-dimensional
    • Conventional Imaging
    • Polystyrene Beads
    • Maximum Contrast
    • Simulated Object
    • Feature Distance
    • Characteristic Distance
    • Sensor Array
    • Central Objective
    • Object Size
    • Simulated Size
    • Radius Of Region
    • Small Pixel Size
• authors:
  • Author Name: Honghao Ji
    Affiliation: Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA
    Author URL: https://ieeexplore.ieee.org/author/37331470400
    ID: 37331470400
    Order: 1
    Author Affiliations:
    • Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA
  • Author Name: David Sander
    Affiliation: Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA
    Author URL: https://ieeexplore.ieee.org/author/37270818900
    ID: 37270818900
    Order: 2
    Author Affiliations:
    • Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA
  • Author Name: Alfred Haas
    Affiliation: Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA
    Author URL: https://ieeexplore.ieee.org/author/37628743900
    ID: 37628743900
    Order: 3
    Author Affiliations:
    • Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA
  • Author Name: Pamela A. Abshire
    Affiliation: Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA
    Author URL: https://ieeexplore.ieee.org/author/37270824500
    ID: 37270824500
    Order: 4
    Author Affiliations:
    • Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA

Image Sensor

• sensor_type: CMOS
• resolution: 96x96
• dynamic_range: 53.6 dB
• pixel_size: 8.4 µm
• dark_current: 113.6 e-/s

Optical Data

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

Performance Metrics

• noise: 2.5 mV (temporal noise)

Applications & Benefits

• cell_imaging: Monitoring cultured cells embedded in lab-on-a-chip devices.
• benefits: High sensitivity, portability, and ability to detect microscale objects.

Supporting Organizations

• supported_by: National Science Foundation (NSF), Laboratory for Physical Sciences (LPS)

Manuscript Details

• publication_date: Aug. 2007

Relevancy Score

• score: 10
• missing_fields:
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • frame_rate
  • signal_to_noise_ratio
  • sensitivity
  • shutter_speed
  • power_consumption

Processed JSON Filename

request_20b6a90c-c5b8-4ae0-8328-e2f3d3035add-contact_imaging_simulation_and_experiment.json