Thursday, January 12, 2012

Camera Water Proofing part II

Here is the finished version of the waterproofed camera.


Here is the camera looking at the TV!

Here is a front view!

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Currently the Camera is sitting in water for its first water test. As far as the electronics go, everything is running perfectly. As far as the video is concerned... it is not so good. It may be that the camera only has 12 inches of water between it and the furthest object, but nothing is in focus at that range.
I think that further testing in a larger body of water is necessary before proceeding to waterproof the other two cameras.

A complication arose during the potting process which may be responsible for the blur. Upon inspection of the finished product, it was noted that resin had seeped into the air gap between the case and the lens. As this would interfere with the video, I drilled out the air gap and cleaned the entire area. Luckily, the resin which seeped in was lacking in catalyst and was still in its liquid phase.

After the cleaning procedure, the camera was tested in air and found to be free of any optical defects. Water immersion revealed the focal problem, which may stem from the main lens being immersed in water as opposed to air.

Two possible conditions may apply.
The focal length has changed due to the immersion in water, and objects at distance will be in focus.
No objects will be in focus, and an additional layer of plastic will need to be added to reestablish an air gap.

Testing on Saturday will determine the proper course of action. Bardia's place, 9 am. If a solution is found, the other two cameras will be waterproofed after testing.

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