Viewmaster wrote:Strewth Harry, that looks to be one impressive piece of kit.
Demonstrated with moving images too !
Hi Albert i try and make it look pretty and hope to get it working its am matter if my PMT cooperates
plan was really just the cd holder and lens then trial and error what works and what i had handy .
I may have to go your way into the stars as a simple photo diode doesn't pick up
my green laser pen.
I sort of recall looking into this colour problem Albert around the time of the flying spot camera i linked you a while back if you notice i used a green laser at the time defocused and a nikow and lens to refocus the nipkow dots ....i used 2 solar cell and head amp it is sensitive to green as most light from the sun is i think this frequency ....could be your light sensitive diode is UV sensitive more than likely ....if you don't know and want to test try a test with different colour leds ......BTW they are not great as normal light sensitive devices but LEDs can be used as this ....i would for your device use a solar cell or bank of them placed different areas of your scan ...they have a large surface area photo diodes and tranys are very directional things .
A small solar cell I just tried is much better but your PMT detector looks to be THE goods.
It will like Green light Albert and from a wider area so keep your green laser ! Yes may be a PMT they seem very sensitive i should find out what it can pick up towards the end of this experiment .
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.