Shadowgraph: Telecentric Imaging System

Wassoc's Shadowgraph is a compact subsea imaging system utilizing telecentric optics to capture in situ silhouette images of zooplankton (or other small targets) as they flow through a defined volume. The defined imaging volume makes it easy to measure and quantify targets, while the far-red collimated backlight minimizes species avoidance. Integral UV lights and hard-coat anodized components mitigate biofouling and corrosion on long deployments.


The Shadowgraph is optimized for integration onto a subsea glider. However, due to its size, RS-232 communication protocol, and low power requirements, the Shadowgraph can be integrated onto virtually any subsea asset.

  • Compact design
  • 1000 meter rated
  • Custom configuration
  • Quick integration onto subsea glider
  • Operable via PC and DC power supply

Mechanical

Housing MaterialAnodized Aluminum
Dimensions (L x W x H)21 x 11.75 x 2.75" /
53.5 x 30 x 7cm
Weight (in air/water)9.5lbs [4.3kg] /
0.8lbs [0.4kg]
ConnectorSUBCONN MCIL8M

Environmental

Depth Rating1000m
Operating Temp-10 to +50°C
Biofouling MitigationUVC LED Array
Corrostion MitigationAl Alloy Anodes

Electrical

Power Supply5.3-36 VDC
Power Consumption~2W (max)
SSD Capacity1TB

Optical

Image Sensor12.3MP, 1/2.3 Rolling Shutter
ColorBayer RGB 12 Bit/channel
(monochrome available)
Pixel SizeSquare, 1.55µm
Active Pixels4056 x 3040
Min Shutter Speed104µs
Imaging Rateup to 2Hz (Full Sensor)
Compressionjpeg, png, or raw dng
Back Light620nm (mult options)
Resolving Power≥100µ
Imaging Volume13.6cu. in [224cc]
Image Circle⌀1.75in [4.5cm]
Tunnel Width5.67in [14.4cm]

System

CommsRS-232, WLAN

Have questions about our systems or integrations?

Contact our team to discuss custom configurations, deployment options, or technical details.

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