Shrinking the Telescope - "Astronomers in the last 50 years have made wondrous discoveries, extensive our insight of the universe and opened humanity's foresight beyond the illustrated measure of the electromagnetic spectrum. Our knowledge of how the cosmos was born and how many of its phenomena arise has grown exponentially in just one human lifetime. In spite of these great strides there remain basic questions that are largely unanswered. To additional our insight of the way our present universe formed following the Big Bang requires a new type of Observatory having capabilities currently unavailable in whether existing ground-based or space telescopes."
The bigger is better opinion is so embodied within our consciousness, that just the idea of smaller more efficient telescope seems to defy all the laws of science. Yet, science always supports little Size Telescopes. It is, however, the lock of insight of the basic principle of focus that has deprives us over the centuries. Study in this field has provided a full insight of the science behind optic telescope operation that has contributed to the make of the next generation of telescopes. The introduction size of little telescope will be the size of a viewfinder now used on present telescopes. Yet, these new generation of telescopes will posses resolving mighty greater than even the largest known telescope.
Telescope
Technique in lens and mirror manufacturing has improved significantly over the centuries. With the aid of computers, lasers, and robotics technologies, optics can be made with precision accuracy. Eventually, the size of telescopes will sacrifice to wearable instrument as small as a pair of eyeglasses, in the not so distance future. Telescopes will soon be comprised of very small (a few centimeters in length) tubes fitted into a headgear. They will have the benefit of literal, movement and shock absorbent the human head provides. Wide field of view similar to that of the naked eye, impressive focus, infinite magnification (limited only by light pollution and disturbance), and brightness allowing snap shot color photographing and live video recording. Headgear will be convenient, efficient, and versatile. The make reserves the possible to be up-graded and customized. After practically 400 years of telescope development, we ultimately have a revolutionary breakthrough now capable of reshaping telescopes science and create revolutionary optic devices to shrink football size telescopes to a view finder, and finally into a pair of glasses. Welcome to the new age of telescope technology.
The Impossible Made possible - As our technological achievements shape the future, we find ways to make the impossible possible. We permanently heighten existing technology by production them smaller and more efficient. In many cases, smaller more integrated designs growth the wide category of efficiencies. We are now capable of manufacturing instruments on a little scale, with the irregularity of the optic telescope. optic telescope is the only instrument that actually grows in size rather then shrink. As we expand in Study and improvement of these instruments, they grow larger in size with each new generation. It is every astronomer dream to have passage to a high resolving power telescope, yet small sufficient to be portable.
However, it is embedded in our minds that we are unable to growth resolution with reduced size in a single design. In relation to this, engineers continue to build bigger and bigger instruments, creating monsters and giants. The reckon little Size Telescope is determined impossible lies not only with optic science, but also with unclear insight of the principle of light. We still don't understand the complicated interaction complicated in both viewing and capturing images, until now. It is for this uncertainty, why we still use two separate theories of light. Light is viewed as a particle that accelerates from point A to point B, and light is also viewed as waves that send by means of wave motion. Where one law fails to make sense, the other is applied. little Size Telescope is base on 'Unify law of Light'.
The Science - Our eyes are very unique: a young person's pupil dilates between 2 and 7 millimeters, yet, the eye posses the capability to view images some thousands meters in diameter. Our wide field of view provides convincing evidence that we view converging image rays and not parallel rays. Converging image rays obeys the inverse square law of electromagnetic radiation. Converging rays present rays that convert towards a point. Therefore, image carried by these rays sacrifice their cross sectional area with distance travel. Images collected by the largest telescope aperture, actually enters the few millimeters of our eyes. Small sight angle (true field) at seconds of a degree, so small the brain finds it difficult to separate the details they consist of for recognition, when they are factored into our full field of view. These small-angles of data get compressed within our large field of view, and appear to be just a small spot or come to be invisible.
Nevertheless, magnification provides the means by which small sight angles are converted into larger ones. A refractor telescope with an aperture of 30 millimeters and 120 millimeters focal distance (focal ratio f/4), providing a magnifying power of 5x times and will have an exit pupil of 5 millimeters. This is a very enthralling telescope, tapping close the maximum of 7 millimeters chance of the pupil. If a second telescope was constructed, having selfsame aperture size of 30 millimeters, but have a focal distance of 1200 millimeters (f/40). The magnifying power will be 50x times. Instead of a 5 millimeters exit pupil, such telescope will now have an exit pupil of only 0.5 millimeter. From the same formula, to collect a 50x times magnifying power and an exit pupil of 5 millimeters, the aperture needed is 300 millimeters.
Refractor telescopes cannot collect a 7 millimeters exit pupil without being affected by aberrations. In order to overcome this, telescope designers exertion to allocate a equilibrium between magnification and brightness. Resolving power describes this balance. The compromise will sacrifice brightness, but growth magnification power and image clarity by the same proportion. The ocular plays an leading role in finalizing the image of the apparent field. They are capable of influencing field of view, magnification, and exit pupil (brightness). A short focal distance ocular will contribute a large magnifying power, small field of view, and short exit pupil; while, a long focal distance ocular will contribute a small magnifying power, large field of view, and long exit pupil. From this example, one can see that magnification is inversely proportional the diameter of the exit pupil, and exit pupil is directly proportional to brightness.
From the bigger is better formula, we know that by increasing the aperture of the objective, we can growth the exit pupil and thus the brightness of the image. There are some optic make aberrations that set restriction on modem telescope design. In designing optic systems, the optic engineer must make tradeoffs in controlling aberrations to achieve the desired result. Aberrations are any errors that result in the imperfection of an image. Such errors can result from make or fabrication or both.
Achromatic lenses are advanced to sacrifice color aberration created whenever white light is refracted, but with even the best designs, color aberration cannot be totally eliminated. Color aberration also consists of a secondary result called the secondary spectrum. The longer the focal ratio, the fainter the secondary spectrum becomes. Color aberration limits most refractors to a focal ratio of f/15. Reflectors, which is less affected by color aberration, has focal percentage of f/5 for commercial make and f/2.5 for pro designs. Within known telescope design, the separate conditions needful for image perfection is integrated, thus forcing engineers to compromise to collect a close equilibrium that will render the best possible image.
What if magnification, focus, and brightness could be separated? The new formula for âEur~Miniature Size Telescopes' isolates each of these factors and allow each to be independently tuned for maximum efficiency.
The Desire for Magnifying Power- "The Overwhelmingly Large Telescope (Owl) is an awesome project, which requires international effort. This huge telescope main mirror would be more than 100 meters in diameters and will have resolution 40 times better than the Hubble Space Telescope. This is a telescope with a primary mirror the size of a foot ball field."
The need for greater magnifying power started with the Galilean design. Study and experiments to heighten the telescope's magnification shows that growth in magnification power is directly proportional to the contrast in the focal distance of the objective and the ocular (eyepiece), where the ocular focal distance is the shorter of the two. The race to build the most mighty telescope started at an early age in telescope development. The greatest minds at the time compete to dominate the shaping of this new technology.
During this era, telescope tubes were made very long. At times, these tubes reach distance that renders them unstable. In some cases the tubes were removed from the instrument's design. Tubeless telescopes were called aerial telescopes. As telescope Engineers compete to make more mighty telescopes, they unknowingly encountered a secondary question that limits the distance and magnification of these early 'refractor' telescope designs. They notice that images became darken with growth magnification. Some how, magnification was reducing the amount of light entering and or exiting the telescope lenses. The explanation for this phenomenon, was that sufficient light wasn't exiting the telescope's ocular, as sufficient light wasn't been collected at the objective. An growth in the aperture size increases the exit pupil and the question of dark image with magnification was solved.
At this stage in telescope development, only Keplerian and Galilean 'refractor' telescopes were invented. Lens production was in its early stages and it was difficult to make capability lenses. Large aperture lenses were even a bigger challenge. Refractor telescope soon reach its' size limitation, but now that the second section to the formula for high resolving power is known, reflector telescope of some variations was born.
To date, practically 400 years later, the same formula is still used. Modem improvements plainly growth the capability of the optics now use, where modification minimized aberrations. We can now build larger telescopes with resolving power and brightness never taught possible in the time of Galileo, but the formula used in developing these modem instruments is the same as the earliest designs-bigger is better. The bigger is better formula is not without limitations. For example, color aberration limits the brightness of a refractor telescope, which requires a focal ratio of f/I 5 to filter out secondary spectrum aberration. The required focal ratio limits the light collecting capabilities of refractors. Reflectors are not affected by secondary spectrum effect. Focal ratio in the range of ff2.5 is uncostly when requiring exit pupil close to 7 millimeters. However, any exertion to growth magnification within these reflector telescopes while maintaining brightness, will require growth in the aperture and the focal distance in the same proportion. It is these make features that makes the phrase âEur~bigger is better' so convincing.
Previous Limitations - insight of the principle of light has rewarded us with the improvement of contemporary optic technology. The present article is written to introduce a breakthrough in Study and improvement of Small mighty Telescopes. Most major telescope industry will wise up you that magnification is not of needful importance; and that brightness is a more articulate concern a buyer should have when shopping for a telescope. Magnification and brightness are equally leading for viewing and capturing distant images, but the most leading factor in rendering details in an image, is focus. Of all the basic law involve in capturing an image, focus is less understood. The awareness of an image focal point and how to achieve a focus image can be actually calculated, but what are the electrodynamics interactions that composed a focus image is still unanswered.
All optic instruments are make nearby focus; therefore it will always be a top priority in the formation of clear image. Magnification and brightness are of secondary importance, they are the result after focus is achieved. It is the needful distance of focus that determine the maximum magnification and brightness at which an image will be clearly viewed. Magnification describes the performance of converting smaller sight angles (true field) into larger ones (apparent field), this contribute convert in the angle at which the image rays are received, thus, tricking the brain into believing that the object is whether closer or larger then it actually is. If it wasn't for the need for focus, a single convex lens âEur"a magnifier-would be a telescope capable of infinite zoom magnification, straight through the performance of plainly varying the distance it is held from the eye. Unfortunately, however, there is a needful distant at which images are focus straight through a single lens or even a law of lenses. This is also known as the needful distance of focus.
What is focus? Webster's Dictionary: fo-cus; is the distinctness or clarity with which an optic law renders an image.
Four Hundred Years History - The discovery of distant magnification was by accident. Early lens maker, Jan Lippershey was experimenting with two separate lenses when he discovered the result of distant magnification. He found that by retention a negative lens close to the eye while retention a certain lens in alignment with the first, away from the eye, that distant objects appeared much closer than they would with the naked eye. Since then, Study to understand and construe the science behind these magical devices is still being attempted. Even with today's technology, telescope designers are still faced with major make limitations and challenges that forge a compromise between telescope size, brightness, and image clarity. Scientists have always been puzzled by the nature of light. Sir Isaac Newton regards light as stream of tiny particles traveling in straight line. Dutch scientist Christian Huygens, on the other hand, believed that light consisted of waves in a substance called the ether, which he supposed fill space, together with a vacuum. Huygens opinion became appropriate as the better law of the two. Today, however, scientists believe that light consist of a stream of tiny wave pockets of energy called photons.
The Bigger is better formula - "With a telescope that has 10 times the collecting area of every telescope ever built. You would be able to go down some thousand times fainter than the faintest thing you see with todayâEur~s telescopes."
The formula that shaped known telescopes over the centuries of improvement is pretty basic, well known, and proven- bigger is better. This is the same as saying that larger aperture provides brighter image, while longer focal distance provides greater magnification. Even so, is this formula written in stone? Let's put the formula to the test. Can large magnification be obtained without long focal distance objective? The retort is yes. Microscopes contribute very large magnification with relatively short focal distance objective. Is it possible to collect light without very large aperture size? Again, the retort is yes. Microscope also demonstrates this. Then why is it that microscopes contribute great magnification with sufficient brightness at a relatively small size, while telescopes cannot? This shows that it isn't the law of magnification nor brightness, but it the instrument's make limitations that insist on the opinion that bigger is better. A basic Keplerian make telescope operates as a microscope when viewed straight through the other end of the tube. From the fact that telescopes are basically an inverted microscope, one can see the close association between the two.
An international appropriate full size trainee microscope provides as much as 400x magnifying power, yet such a microscope consists of a tube less then 20 centimeter in length. sufficient light is reflected from its' plain-o-convex mirror less than 7 centimeters in diameter. In order to collect selfsame brightness and magnifying power in a telescope, focal ratio of f/2.5 is recommended for an exit pupil close to 7 millimeters. Such telescope will require an aperture of 320 centimeters (3.2 meters) and a focal distance of 800 centimeters (8 meters), calculating practically with a 20 millimeters ocular. This is an growth of practically 50x in size. This shows that brightness is not little to large aperture, nor magnification little to long focal length. However, the 'bigger is better' formula is a make limitation that face only in distant magnification. Focusing of distant images is more enthralling than focusing of close-up images. We can prove this with a single magnifying lens that is held close to the eye. Objects additional then 2/3 the focal distance of the lens will be out of focus.
All optic systems are make nearby focus. In order to vary magnification and brightness, focus has to be constant. We may compromise magnification for brightness and visa- a- verse, but we can never compromise focus. Therefore, instead of saying that magnification M is inversely proportional to brightness, it is also literal, to say that magnification M is equal to focus divided by brightness B, where focus is a constant D.
M = D/B
Magnification power (M) = focus constant (D) / brightness (B) Within know optic telescope design, all three factors are integrated. Focus has been the primary factor for rendering a clear image, while magnification and brightness both serves as a secondary factor in the appearance of a focused image. For known optic systems, focus, brightness, and magnification are inseparable. The resolving power is used to sum up the operation of a telescope. It is established by the telescope's capability to imprint details within an image. A photo is the imprint of individual dots that comes together to form a perfect picture. Magnifying a photo involve stretching these dots. Light magnification is much separate from photo magnification, and magnifies by changing the angle of the received image light.
But there is the breakthrough question, what if these three leading factors could be isolated and individually tuned? Hm mm. Telescope engineering will not be the same again, and the science of astronomy will explode.
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