Editing Mars (section)

==Fresnel Lenses==
[https://www.youtube.com/watch?v=4MhCYJqkgh8 Fresnel Lens Flexible 380mm solar Adhesive FREE glass adhesion
]

Cool, casting ultra clear / optical liquid silicone rubber on a reverse relief Fresnel mould and degassing it with a vacuum.
Does the mould need to be reverse? Or it doesn't matter? I got to get me some of that optical LSR, i bet you can do some really cool stuff with it, like fiber optics for example.

Nice vid, good to spread these kind of ideas to empower people around the world to create their own green energy.
Reply     
 GREENPOWERSCIENCE 
GREENPOWERSCIENCE2 months ago
That does not work well. The Fresnel rings collapse when releasing. The mould needs to be curved and the casting material needs to be backed with a marching shape. This is similar to the rolled method used for large lenses when the were made in the 90's. For smaller lenses, like page magnifiers, the straight mould works because the focal length is short and optics are not critical. This was produced on a mould that curved about 40 degrees.
Reply     
 Björn Persson 
Björn Persson2 months ago (edited)
Ah ok, experiences and methods may differ, i have seen some amazing results with modern optic LSD, and it's use is growing in many areas and with that, the accessibility also for the public.
I bet that many modern ultra clear / optical LSRs like Siloprene 7000 series or Omnexus optical products can produce the same results or better, and if there is no need for flexibility an equivalent optical epoxy or resin can be used of course.
I am not any expert on fresnel lenses by any means, but i happened on your videos and it struck me as such an obvious, affordable and easy self-manufacture that could be very effective in areas where power may not be available.

There is some other - less obvious - innovations being worked on using optical LSR that I follow with great interest like the Flexible Sheet Cameras which similarly is used for focusing light but with a different approach, and quite interesting possibilities. http://www.cs.columbia.edu/CAVE/projects/flexible_sheet_cameras/
Show less

*it's made clair cilicone  molding into a satellite parabola* *it's actually made of clear silicone mold into a shape plaster*

JUST BUY ONE FRESNELL LENS, COPY THROUGH TRANSPARENT EPOXY  AND CREAT AS A CASTING MOLD , IT WILL WORK  JUST LIKE CONVEX LENS  , WHEN AGAIN PUT CAST ACRYLIC LIQUED THEN CANVEX FRESNAL LENS CREATED IN ACRYLIC/PU/PVC/EPOXY RESIN,