Hubble Space Telescope - Research Paper by Nohelimarie

The telescope optical tube is characterized by it's 1) Design (see below), 2) Aperture the diameter of the primary mirror or objective refractive lens (expressed in millimeters or inches), and 3) effective Focal Length - essentially a measure of how much magnification the basic telescope optical system produces; this too is expressed in millimeters or inches.

There are many ways to make a refracting telescope; some poor and cheap, others superb and costly.

2, On the other hand one can see about the same area of the image with a negative lens by scanning one's eye over the eyepiece, plus one has an upright image . Combine this with the fact that the telescope with the negative eye piece is considerably shorter than the one with the positive eyepiece make the telescope easier to carry around. Last but least his goal was to make a marketable product to make his money in a hurry before the competition from eye glass producers got there first. He had to be aware of the possible commercial value of selling and licensing the production of high power telescopes.


Galileo And The Telescope Essay Research Paper - …

God Did Not Make All Telescopes Equal: Telescopes do vary in design, aperture, physical dimension (length, width, and weight).

In this paper we apply a vector representation of physical optics, sometimes called polarization aberration theory to study image formation in astronomical telescopes and instruments. We describe image formation in-terms of interferometry and use the Fresnel polarization equations to show how light, upon propagation through an optical system become partially polarized. We make the observation that orthogonally polarized light does not interfere to form an intensity image. We show how the two polarization aberrations (diattenuation and and retardance) distort the system PSF, decrease transmittance, and increase unwanted background above that predicted using the nonphysical scalar models. We apply the polarization aberration theory (PolAbT) described earlier (Breckinridge, Lam and Chipman, 2015, PASP 127, 445-468) to the fore-optics of the system designed for AFTA-WFIRST- CGI to obtain a performance estimate. Analysis of the open-literature design using PolAbT leads us to estimate that the WFIRST-CGI contrast will be in the 10-5 regime at the occulting mask. Much above the levels predicted by others (Krist, Nemati and Mennesson, 2016, JATIS 2, 011003). Remind the reader: 1. Polarizers are operators, not filters in the same sense as colored filters, 2. Adaptive optics does not correct polarization aberrations, 3. Calculations of both diattenuation and retardance are needed to model real-world telescope/coronagraph systems.


History of the telescope - Wikipedia

This new view of the North America nebula combines both visible and infrared light observations, taken by the Digitized Sky Survey and NASA's Spitzer Space Telescope, respectively, into a single vivid picture.

The first record of a telescope comes from the Netherlands in 1608

AB - In this paper we apply a vector representation of physical optics, sometimes called polarization aberration theory to study image formation in astronomical telescopes and instruments. We describe image formation in-terms of interferometry and use the Fresnel polarization equations to show how light, upon propagation through an optical system become partially polarized. We make the observation that orthogonally polarized light does not interfere to form an intensity image. We show how the two polarization aberrations (diattenuation and and retardance) distort the system PSF, decrease transmittance, and increase unwanted background above that predicted using the nonphysical scalar models. We apply the polarization aberration theory (PolAbT) described earlier (Breckinridge, Lam and Chipman, 2015, PASP 127, 445-468) to the fore-optics of the system designed for AFTA-WFIRST- CGI to obtain a performance estimate. Analysis of the open-literature design using PolAbT leads us to estimate that the WFIRST-CGI contrast will be in the 10-5 regime at the occulting mask. Much above the levels predicted by others (Krist, Nemati and Mennesson, 2016, JATIS 2, 011003). Remind the reader: 1. Polarizers are operators, not filters in the same sense as colored filters, 2. Adaptive optics does not correct polarization aberrations, 3. Calculations of both diattenuation and retardance are needed to model real-world telescope/coronagraph systems.

Hubble Space Telescope - Wikipedia

The goal of the buyer should be to make the most reasonable compromise possible
after considering your particular circumstances, and observing (or photography) goals.The basic philosophical aspects of choosing the telescope will be:

Vatican Advanced Technology Telescope ..

The South African Radio Astronomy Observatory and the South African Environmental Observation Network, which are National Research Facilities managed by the National Research Foundation, signed a three-year Memorandum of Agreement to implement the Integrated Environmental Management Plan for the SKA project in South Africa.