Schematics of Solar Trackers from Other people

Since there are lots of solar tracker designs.  I decided to make a post containing a bunch of different designs, so that maybe my team or another team can use them as inspiration for our own design.

1. HinesLab Helio Sun Tracker
http://www.hineslab.com/SolarTracker.html

Above is the original sketch of this man's idea.  Here are some more schematics.

This drawing would use Fresnel lens to concentrate light

This one uses a Parabolic reflector.

This is his mechanism for if it were floating in water.

I thought these were all interesting designs because when I was driving home the other day I was watching the long grass sway about and I thought maybe that would be an interesting solar tracker idea...apparently so did someone else haha.

2. Traxle - A Czech Republic Company who uses varying positions of mirrors in a triangular pattern.

http://www.solar-trackers.com/photogallery.asp

3. ZomeWorkers - SunBlender

http://zomeworks.com/files/sunbenderTM/Sunbender%20Brochure%202009.pdf

Adjusts for hot and cool season.

Hot Season Sunbender that cools

SunBender that is for cool season.

4. SolFocus - Uses their design to focus the light

http://www.solfocus.com/es/

Close up of the focusing units

Larger scale view of trackers

5. MecaSolar - "Flexible" Solar

http://mecasolar.com/_bin/caracteristicas_fijos.php

Direcly mounts into the ground and based upon the depth of mounting can create a flexible appearance.

A few common characteristics:

- all have generally large surface area

- most are flat and dark

- most are fixed and have some sort of rotation/swivel ability

- most are expensive

- work only in direct sunlight areas

- use mirrors or lens to enhance amount absorbed my solar cell

- most are not things people want in their yards because they are a bit clunky...

My questions are:

- How can a solar tracker be made with less clunk, but same surface area (like the rod trackers example #1)

- For cloudly days, besides an expensive umbrella, is there anything else these might be able to do?

- Can the tracking mechanism be replaced with something that does it naturally, like plant motion

- Can these be made more attractive for parks, or homes?

- Can non-flat surfaces be used to make solar trackers, perhaps increasing it's surface area?

- What can these things do at night?