• Welcome to Orpington Astronomical Society.
 

News:

New version SMF 2.1.4 installed. You may need to clear cookies and login again...

Main Menu

Bahtinov Mask

Started by MarkS, Oct 01, 2008, 23:40:28

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

Print
Go Down Pages 1 2 3 All
User actions

mickw

#30
Mar 17, 2011, 07:39:38
Love the gears  8)

The reason the acrylic I gave you didn't work was because it was polycarbonate - Sorry  :oops:

I'd better get some numbers to you soon as well
Growing Old is mandatory - Growing Up is optional

RobertM

#31
Mar 17, 2011, 08:50:00
Neat gears  8)

Those 80mm masks look ok, were they with the original figures I gave?

Robert

Mike

#32
Mar 17, 2011, 08:55:53
Robert, they were with the second set of figures. The original set had the slits so close together that the supporting struts also got burnt away during the cut. You might want to look at the designs for the other two as they may need adjusting too.

Once you are happy with the design I will cut them for real.
We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology. Carl Sagan

The Thing

#33
Mar 17, 2011, 11:08:04
Quote from: Mike on Mar 17, 2011, 00:17:21
Just for a laugh I made some planetary gears (tenuous astronomy link) too.
What sort of diffraction pattern would that create!

Rocket Pooch

#34
Mar 17, 2011, 11:16:38
Quote from: Fay on Mar 09, 2011, 13:52:06
I have an 8" one I can sell

Is it an SCT one with the big hole in the middle?

Chris
Print
Go Up Pages 1 2 3 All
User actions