Reverse Energy Dump

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AndiesHandyHandies
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Reverse Energy Dump

Post by AndiesHandyHandies »

Hi

Professionals use perforated diagonals to reject off axis light and heat which is not wanted.

For a shorter refractor you could turn the scope round 90deg on an equatorial mount and then have a diagonal on a stick on the front to pick out the light cone you want. Scatter is eliminated as unwanted light just goes harmlessly past the diagonal. Increase the contrast.

Coloured glass ERF on a stick in front of the diagonal so absorbed heat floats off.

You will need a sun shield over the OTA.

Cheers. Andrew.


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marktownley
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Re: Reverse Energy Dump

Post by marktownley »

Have you got a picture of what you mean Andrew?

Wouldn't the scope be restricted to small aperture?


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AndiesHandyHandies
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Re: Reverse Energy Dump

Post by AndiesHandyHandies »

Hi

No piccie. You need the mirror in a diagonal holder above the objective of a refractor. Wires to 4 sticks on the outide of the ota held on with a tube ring or two.

https://agenaastro.com/gso-elliptical-s ... 88-mm.html

104mm a decent size for solar.


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Rusted
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Re: Reverse Energy Dump

Post by Rusted »

This idea sounds similar to the Coudé family of refractors employing optical flats. Not only does it add more weight, where it is highly undesirable, but it also adds image rotation. Imaging capture software can be made to flip the resulting image.

There is a form of refractor which faces downwards. A large optical flat just below the objective reflects the sky upwards into the telescope. The flat can be tilted to cover more of the sky but suffers from dewing, ground thermal currents and limited sky coverage.

Solar telescopes have used one or more optical flats [mirrors] for many years to pass the sun's light into a fixed telescope.


http://fullerscopes.blogspot.dk/

H-alpha: Baader 160mm D-ERF, iStar 150/10 H-alpha objective, 2" Baader 35nm H-a, 2" Beloptik KG3,
Lunt 60MT etalon, Lunt B1200S2 BF, Assorted T-S GPCs or 2x "Shorty" Barlow, ZWO ASI174.
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