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Panrock wrote:1) They'll have to be made of something other than stainless steel! Although I have now obtained a good polish on the reflecting edges, there still seems to be a 'grain' effect disturbing the quality of the image. A mirror screw needs to exhibit a perfect, smooth, mirror finish.
Steve O
Viewmaster wrote:Just an interesting extra in that the direction of scan is in the opposite direction for a convex slat compared with a convex one.
To prove it, get a flexible bendable surface ( perspex or cover of a CD).
Bend it to concavity and watching a lamp reflected in it rock it to and fro noticing the direction of the 'reflected light.'
Do the same with a convex bent surface. Notice how the direction of the'scanned light' is reversed.
Viewmaster wrote:Quotes from Peter Yanzer's site........
http://www.televisionexperimenters.com/ ... ology.html
Viewmaster wrote:"The stainless steel screw produced an excellent 120-line picture"
........end quotes.
A grain effect maybe caused by insufficient very, very fine polishing with the very finest of grits.
Non stainless may tarnish in time ???
dominicbeesley wrote:The viewing angle is indeed tight, though this can be mitigate a fair bit by adding extra lines above and below the picture and by making each line a bit too long.
I'll definitely include this now.kareno wrote:Yes, a little overscan is a good idea to cope with sync drift.
This bit I still have to get my head around.kareno wrote:Also, if you choose the slat width in strict accordance with the aspect ratio for the height of the stack (i.e. slat width = 4/3 * stack height for a 4:3 aspect ratio) then you will be forced to place the light source right next to you.
Could this be done by simply stepping back a bit?kareno wrote:If you want the light source to be to one side, i.e. some degrees around to the left or right, then the active mirror (that which is showing a light spot) will be tilted away from you by half that angle, and the apparent width of the mirror will diminish. You'll need to compensate for this.
Very useful. Thank you.kareno wrote:The world reflected in the mirror screw has a circular 'fence' of images - 120 of them! The radius of this circular fence is, for the case of flat mirrors, the same as the distance of the light source from the screw. The width of the slats has to be sufficient to see one of the images on this imaginary fence - preferably the one that is correctly synced!
Could this be done by simply stepping back a bit?
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