Old technology makes a comeback

ffreeloader · May 2, 2008

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It seems if you live long enough what's old becomes new again. The old pin-hole camera is making a comeback, only this time it's as a telescope.

A proposed space telescope would focus light primarily with a patterned sheet of metal rather than a large mirror or lens. The telescope would have amazingly sharp vision and could spot Earth-size planets around other stars, its backers say.

Telescopes used for astronomy normally focus light using a curved mirror. But there are limits to how large a mirror can be sent into space. That's because of the tremendous cost of lofting heavy objects into orbit, as well as the limited cargo capacity of launch rockets.

But a team of scientists is experimenting with a completely different approach for focusing light. It does not require a large primary mirror or lens, though it does use a smaller secondary mirror and lens.
Click to expand...

You can read the rest of this article from NewScientistSpace.com here.

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Old technology makes a comeback

ffreeloader Terabyte Poster

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