advanced underwater imaging l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Advanced Underwater Imaging PowerPoint Presentation
Download Presentation
Advanced Underwater Imaging

Loading in 2 Seconds...

play fullscreen
1 / 11

Advanced Underwater Imaging - PowerPoint PPT Presentation


  • 422 Views
  • Uploaded on

Advanced Underwater Imaging James M. Glynn <glynn@psicorp.com> 10 October 2008 Advanced Underwater Imaging Program Overview A combined hardware/modeling/experimental effort to develop a novel pulsed laser line scan (PLLS) imager

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Advanced Underwater Imaging' - libitha


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
advanced underwater imaging

Advanced Underwater Imaging

James M. Glynn <glynn@psicorp.com>

10 October 2008

advanced underwater imaging program overview
Advanced Underwater Imaging Program Overview

VG00-

  • A combined hardware/modeling/experimental effort to develop a novel pulsed laser line scan (PLLS) imager
    • Imaging at longer ranges in turbid water than a conventional CW laser line scan, in a more compact hardware package
    • Reduce size and power requirements to enable implementation in compact unmanned underwater vehicles (UUV’s)
highlights
Highlights

VG00-

  • New hardware
    • Folded scanner geometry
    • High power, high rep rate, short pulse laser
  • New imaging test facility
    • Large scale test tank with controlled illumination and water optical properties
  • New performance modeling capability
    • Laser pulse time history
    • Pulsed laser image simulation
  • Experimental validation of hardware and model performance
novel scanner design
Novel Scanner Design

VG00-

  • Folded scanner geometry enables use of single rotating polygon for transmit and receive
  • Results in more compact design, enabling UUV configurations
  • Prototype functioning at HBOI
high rep rate pulsed 532 nm laser
High Rep Rate Pulsed 532 nm Laser

VG00-

  • Development at PSI/Q-Peak
  • 2.5W average power, 7 nsec pulses, 350 kHz
  • Enables pulsed gating of target return for backscatter rejection
extended underwater imaging test facility
Extended Underwater Imaging Test Facility

VG00-

  • Unique underwater imaging test facility at HBOI
  • 13 x 7 x 2 m, moving seabed simulator, optical property adjustment and measurement, optics lab
new pulsed laser modeling codes
New Pulsed Laser Modeling Codes

VG00-

  • Developed by Metron Inc. as a variant of their EODES-3 CW laser line scan performance prediction model
  • Time history of laser pulse in water
    • Backscatter and target returns from both laser and solar energy
  • Image simulation
    • Predicted image quality as a function of user-settable parameters
  • Validated against experimental data
  • Use the model as a design aid
pulsed laser performance modeling image simulation
Pulsed Laser Performance Modeling – Image Simulation

VG00-

User sets operational, environmental, system, and target parameters

slide10

CW – PLLS Imaging Comparison

VG00-

PLLS

0.6 AL

5.1 AL

summary
Summary

VG00-

  • New enabling hardware has been built and tested in new large-scale imaging test facility
  • New modeling capability to support design has been validated through comparison with full-scale experiments
  • The pieces are in place to proceed to a targeted development effort for a pulsed laser line scan in a UUV-compatible package