[SMA_Student]

I am making a liquid lens for a digital slr camera, where voltage being applied to the liquid lens, changes the focal length of the lens.

My design is that a stainless steel tubing will be in between two glass lens. Inside the tube, at the bottom will be water, which is electrically conductive, which is covered by mineral oil, which is non conductive.

The oil will sit on top of the water and the interior of the tubing is covered with teflon tape, which is hydrophobic, meaning the water molecules will arrange itself to make at least contact with the tape as possible, and the shape that is mostly made is a water droplet, so the water here will have a miniscus.

This is when the lens is upright, meaning its lying on its glass lens. If I change the orientation of the lens, so its parallel to the ground to fit on a camera, will the oil and teflon tape keep the water and oil in the same position or will the water and oil shift around in the tubing? Basically, will the water still keep its miniscus? This is for my senior capstone project.

Note: Also, is it preferred the entire tubing is filled so the water and oil have no room to shift around when the tube's orientation is changed?

[curiouscat]

Gravity wins. The water will always be the "bottom" and oil the top.

PS. How does the potential work again?

[mikewday]

Just a thought... Could you use mirrors so that the water and oil section would remain upright and the mirrors would reflect the light through the oil and water on its way the camera?

Kind of a shape like a para scope.

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[mbcww]

Re: Hydrophobic Effect Question

« Reply #1 on: November 14, 2012, 07:22:36 AM »

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Gravity wins. The water will always be the "bottom" and oil the top.

PS. How does the potential work again?

That is correct!