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Features (subject to change without notice)
- In-situ digital holography
- Self-contained with internal datalogger
- Ethernet connection to PC for programmable data collection
- Power via external battery pack or external power source
- Two options for hologram offloading:
- Ethernet connection directly to PC (~4 seconds / hologram)
- External, submersible, swappable USB flash drive (~0.5 seconds / hologram)
| Specifications (subject to change without notice)
| Parameters Measured
- 2MB Hologram containing the interference pattern of all particles in the laser beam
(what is a hologram?)
- Depth
- Temperature
Parameters derived upon hologram processing
- Particle Size Distribution (PSD)
- Standard Deviation of PSD
- Particle Area Concentration
- Mean and Median particle size
- 120 seconds processing time per hologram in MATLAB (typical, @ 2.2 GHz PC)
(what determines the processing time?)
Sediment Size distribution and concentration range
- ~25-2500µm size range
- Beam attenuation values between 0 and 4 m-1
Technology
- Solid state laser diode @ xx nm, xx mW
- 4.4µm pixel size digital camera, 1600 x 1200 pixels
- 2 MB hologram size
(what is a hologram?)
- Hologram capture rate programmable up to 1Hz
- Optical path length 50 mm standard
- Sampling volume 1.86 cm3
- Maximum current velocity/CTD speed during deployment: 1.2 m s-1
(why is there a limit to current speed?)
Mechanical and Electrical
- Dimensions: 13.3 cm × 76.7 cm (5.25" × 30.21") [Ø × L]
- Weight: 9.5 kg (21 lbs) in air; 3.6 kg (8 lbs) in water
- 300 m depth rating
- 32 GB internal solid state drive
- 32 GB external USB flash drive
- Battery life: 10,000 holograms for standard 9V, 42Ah battery
- External power input: 9VDC nominal, 6-15VDC
- Power drain: 200µA / 500mA / 600mA / 880mA (sleeping / idling / laser on / laser + camera on)
| | | | | Updated 7/20/2010
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JFIC2010
Las Vegas, NV, 27-29 June 2010, booth 207
9th annual StormCon
San Antonio, TX, 2-4 August 2010, booth 421
Ocean Optics XX
Anchorage, AK, 25 September - 1 October 2010
CASQA
CA, 1-3 November
PiE 2010
Villefranche-sur-Mer, France, 15-17 November
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