How about pinching an idea from the early radar and missile technologies
- Conical Scanning. Basically you offset the detector of feed antenna
from the point of focus and then rotate it. If the signal is off centre
you get sinusoidal modulation of the signal. The phase of the modulation
tells the
Hi all:
Robert's pinching an idea from the early - - brings to mind what we did
in the early days of video/ TV. Hope this inspires some useful ideas.
To measure spot size on CRT, a small slit was placed against the TV or
oscilloscope screen and a photo sensor measured the light intensity
buehl wrote:
Hi all:
Robert's pinching an idea from the early - - brings to mind what we did
in the early days of video/ TV. Hope this inspires some useful ideas.
To measure spot size on CRT, a small slit was placed against the TV or
oscilloscope screen and a photo sensor measured the
At 09:22 AM 9/29/2006 , buehl wrote:
the fiber. I have had good results attaching one end of cheap plastic
fiber to tip of photodiode with clear glue or epoxy. Cheap plastic fiber
like that used in decorative lamps, or experimentor type sold by Radio
Shack, will also pass IR for short
Accuracy still won't be much better than1% of the solar diameter or
about 1 second of time nowhere near the o.1 sec or better hoped for.
Bruce
Bruce,
Can you show us how to derive the accuracy number?
I would have guessed that with fractional degree Al-El
steering, a rotary encoder, 12
Hi:
http://www.fetmar.org/bookClock/
Have Fun,
Brooke Clarke
--
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
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don't think they have the right year showing
tom [EMAIL PROTECTED]
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