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Who needs parabolics?

by Steve Rock
(Wales, U.K.)

ray traced

ray traced

I've just come up with an idea that negates the need for expensive parabolic type reflectors.
I basically bend light in one plane then fold that light on a second plane.
you can see my idea at or google my title.
You should be able to see that a large sized oven could be constructed by almost anyone without the need for any special skills or equipment.
I use the principal shown in the ray traced graphic, but I do it twice in 3 dimentions

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Nov 21, 2016
detail NEW
by: Anonymous

This is only a snippet of my idea, look on the interwebs for who needs parabolics to see the whole story

Mar 08, 2016
by: James Robinson

The device you've drawn is a Cassagrain system like the astronomy telescopes. I toyed with something similar, but found it difficult to design the oven into which the concentrated solar radiation was contained. I saw a much more simplified use of a parabolic concentration. It was a Fresnel reflector that focused on a canister of aluminum rods which when heated sufficiently were extracted and placed in a oven. Oil circulation systems work in the same way.

Dec 15, 2015

by: Nathan

Parabolic cookers are not that difficult to keep clean while cooking, nor that difficult to clean up if you do get splatter on them.
Just some hot, soapy water with a rag and 30 seconds of wiping over the surface, rinse and you are done.

This page has some cleaning suggestions and a couple of videos showing a parabolic clean up.

Solar Burner

Dec 13, 2015
You may have the right idea for a solar cooker, right?
by: Anonymous

I look at those solar cookers and think how much chore it will require to clean up the reflecting surface from the splatterings coming out of cooking food ,right? Your drawing suggests that the solar cooker can be placed above head with the hot ray coming through the center straight down to the food under it as a broiler or to a under mirror as a stove that will bounce back up against the bottom of pots or pans.., right ?It can work great under high Sun but it will need to be re-modified for lower Sun but doable, right? The reflector can be as big as it gets and it can double up as a roof!

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