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another means of viewing distant objects

05/28/2008 8:46 AM

all experts,i have a question....can we be able t see the more distant objects using the replication of lenses.i.e.by using a lot of most precisioned microscopic lenses can we see more distant objects...

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#1

Re: another means of viewing distant objects

05/29/2008 12:02 AM

"i have a question....can we be able t see the more distant objects using the replication of lenses.i.e.by using a lot of most precisioned microscopic lenses can we see more distant objects..." NO. To see distant objects a telescope is employed.

Precisioned microscopic lenses are of short focal length. These might be usable in an eyepiece for a telescope. A telescope also requires a long focal length objective lens to view distant objects. The ratio of the focal length of the objective to the eyepiece is the power of the telescope, as in a Keplerian telescope.

Schematic of a Keplerian refracting telescope. Scroll down to

Refracting telescope designs.

There is more to be seen with a telescope than meets the eye!

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#2

Re: another means of viewing distant objects

05/29/2008 12:47 AM

If you have a way to combine the images many precision first surface mirrors (lenses have refraction issues), to cameras of better resolution than the mirrors ability, to a computer with algorithms to improve the picture before and then another algorithm to improve the picture compared to each other creating the optimum picture, to a storage device, to a high resolution video card, to a monitor of high resolution, to your eye.

The size of the individual units is a ratio of photons gathered to aperture/resolution.

That is not the formula. you will need to understand synthetic apertures, image tracking, interference, vibration isolation, exposure time, field of view, spectrum absorption refraction and reflection, filtering of many types, atmospheric lensing, etc.

what it comes down to is collecting the most quality photons for the least price. The reality is lots of little hi-resolution cameras are cheaper that one equal large one, BUT now you have the issues of: tracking system for each one; combining the images; many more critical parts to fail (each lost camera/image reduces total image quality); more space needed for everything; much harder to protect from the elements; much more communications to process; more specialists to operate.

And it still comes down to the goal of the most photons from the target or targets processed into an image you can refine into data that tells you something.

Also: to microscopic and light waves become to big causing other issues.

Much more information would be needed to quantify an answer. Could it-yes. Will it? On how wide of spectrum? How good is the tracking? How good is the system processing pictures? How many "precisioned microscopic lenses" and the systems to process them is it possible to afford?

way past my bedtime

Brad

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#4
In reply to #2

Re: another means of viewing distant objects

05/29/2008 8:45 AM

oh...thank u my friend...i m sakthi of tamilnadu,india...i dont know how to enter my user profile...that is like U.V of urs....thanks a lot...bye..

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Re: another means of viewing distant objects

05/29/2008 11:20 AM

GUEST:

"i dont know how to enter my user profile...that is like U.V of urs....thanks a lot...bye.."

Register by selecting a User Name. You can then contact others via private mail box.

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#3

Re: another means of viewing distant objects

05/29/2008 1:33 AM

This is basically how a telescope works... You create an object (with the objective lens) that is far brighter than the human eye collect, because the objective lens is many inches wider than the human eye. When the light is collected by the objective, we look at it with the eyepiece, which in essence is a microscope lens and magnifies the image.

The bigger the objective lens (or aperture when considering either lenses or mirrors), the brighter the object image, and the higher the power eyepiece we can use to examine the image. Note that this implies a limit of the magnification that we can achieve using a particular eyepiece.

Images within the eyepiece tend to get dimmer as their power increases - so if we want to use a really high magnification eyepiece, we need a really big aperture to provide the light necessary for that eyepiece.

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#5

Re: another means of viewing distant objects

05/29/2008 11:03 AM

The problem with very distant objects is not the number of lenses, but instead the brightness of the objects we are trying to see. With larger lenses we allow more light in to be focused and therefore we can see farther.

I believe the limit on magnification in the earth's atmosphere is in the 600x range. Beyond that atmospheric conditions distort the image, no matter how good the lens is. Hence the Hubble telescope.

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