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#1
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little flat mirrors
I had a thought - dangerous i know - what if you made a large parabolic
frame out of something like wood (you choose). Then you bought a few large household mirrors and cut small round sections out of them and pasted them onto the wood frame. Would you then have yourself a larger effective mirror on the cheap? Would it work? Eric |
#2
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little flat mirrors
Eric wrote:
I had a thought - dangerous i know - what if you made a large parabolic frame out of something like wood (you choose). Then you bought a few large household mirrors and cut small round sections out of them and pasted them onto the wood frame. Would you then have yourself a larger effective mirror on the cheap? Would it work? Oh yes, you can boil some water and maybe roast a chicken or two |
#3
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little flat mirrors
Eric wrote:
I had a thought - dangerous i know - what if you made a large parabolic frame out of something like wood (you choose). Then you bought a few large household mirrors and cut small round sections out of them and pasted them onto the wood frame. Would you then have yourself a larger effective mirror on the cheap? Would it work? Eric Take a look at this gamma ray telescope, it's 10 meters and not wood. http://jelley.wustl.edu/Pages/images+hopkins.html |
#4
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little flat mirrors
Dan Mckenna wrote:
Eric wrote: I had a thought - dangerous i know - what if you made a large parabolic frame out of something like wood (you choose). Then you bought a few large household mirrors and cut small round sections out of them and pasted them onto the wood frame. Would you then have yourself a larger effective mirror on the cheap? Would it work? Take a look at this gamma ray telescope, it's 10 meters and not wood. http://jelley.wustl.edu/Pages/images+hopkins.html However (and it's a BIG however) is that each segment of the telescope shown in the link are carefully figured parabolic mirrors in their own right rather than 'small round sections' cut from household mirrors. Boiling water or roasting chickens is about the limit of Eric's configuration, I'm afraid - as an early reply suggested. Clear Dark Steady Skies, Dave Jessie |
#5
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little flat mirrors
Eric wrote:
I had a thought - dangerous i know - what if you made a large parabolic frame out of something like wood (you choose). Then you bought a few large household mirrors and cut small round sections out of them and pasted them onto the wood frame. Would you then have yourself a larger effective mirror on the cheap? Would it work? Eric oh well.... |
#6
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little flat mirrors
The mirrors of this instrument are more like household ones than precision
optics. They form a light bucket to feed a large photomultiplier tube, with an aperture of at least a couple of inches. (At least, that was the sensor used 30 years ago, if memory serves.) Its optics are basically similar to those of a solar collector. It might be suitable for burning holes in steel plates using sunlight, although it was probably never used for that purpose. It didn't actually detect gamma rays. It was intended to observe visible-light flashes produced by gammas in the upper atmosphere. Address scrambled. Replace nkbob with bobkn. "Dave Jessie" wrote in message . .. Dan Mckenna wrote: Eric wrote: (snip) Take a look at this gamma ray telescope, it's 10 meters and not wood. http://jelley.wustl.edu/Pages/images+hopkins.html However (and it's a BIG however) is that each segment of the telescope shown in the link are carefully figured parabolic mirrors in their own right rather than 'small round sections' cut from household mirrors. Boiling water or roasting chickens is about the limit of Eric's configuration, I'm afraid - as an early reply suggested. Clear Dark Steady Skies, Dave Jessie |
#7
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little flat mirrors
On 2006-05-14, Eric wrote:
I had a thought - dangerous i know - what if you made a large parabolic frame out of something like wood (you choose). Then you bought a few large household mirrors and cut small round sections out of them and pasted them onto the wood frame. Would you then have yourself a larger effective mirror on the cheap? Would it work? You could make a nice solar furnace that way, but not something that would make an image. |
#8
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little flat mirrors
If you do that, you want to make the front surface of the mirrors accurate
to within a 1/4th wave at a minimum from one mirror to the other. Easy to say but difficult to do in reality. -- Why do penguins walk so far to get to their nesting grounds? |
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