Re: Question about telescope design.
- From: markzoom@xxxxxxxxxxxxx
- Date: Sat, 26 Jan 2008 10:50:53 -0800 (PST)
On 26 Jan, 17:51, Sam Wormley <sworml...@xxxxxxxxx> wrote:
markz...@xxxxxxxxxxxxx wrote:
Just wondering... If much of the input ends up digitised anyway, what
is the point of dished telescopes?
Wouldn't it be enormously cheaper and simpler just to use a strip bent
into a parabolic shape (rather like a slice through a parabolic dish
and sensor) and let the movement of the earth do the scanning in a
raster fashion. That way the expensive sensor only needs to be one
pixel wide by as long as you like.
Has this already been done or have I come up with a new astronomy tool?
You made the assumption that astronomical phenomena static. How
would your approach work for.
o pulsars
o novae
o supernovae
o quasars
o viable stars
o comets
o rotating planets and moons
o binary systems
o gamma ray bursters
OK, using tracking you could repeatedly scan the same bit of sky.The
frame rate would be dictated by how fast your tracker is. You are also
not restricted to using one strip, or one sensor per strip.
Maybe it's possible to have the parabolic strip stationary and move
the sensor slightly for the raster.
Another method would involve a smaller movable strip lens near the
scanner.
It's an analogy to using a flatbed scanner instead of a webcam to scan
documents.
.
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- Question about telescope design.
- From: markzoom
- Re: Question about telescope design.
- From: Sam Wormley
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