MAORY: A Multi-conjugate Adaptive Optics RelaY for the E-ELT
... amounts to a wavefront error of ~ 300 nm root-mean squared (rms). PSFs were computed over a grid of directions in the field and for different wavelengths (Ks: 2.16 µm, H: 1.65 µm, J: 1.215 µm, I: 0.9 µm). The performance is shown in Figure 3 for median seeing conditions (FWHM = 0.8 arcseconds at 0. ...
... amounts to a wavefront error of ~ 300 nm root-mean squared (rms). PSFs were computed over a grid of directions in the field and for different wavelengths (Ks: 2.16 µm, H: 1.65 µm, J: 1.215 µm, I: 0.9 µm). The performance is shown in Figure 3 for median seeing conditions (FWHM = 0.8 arcseconds at 0. ...
PowerPoint presentation on this project
... • the use of cluster computing for segmented mirror control. • software for astronomy and wave front control, and • application program - distributed computing (e.g. Fortran 99). •Beowulf Background •technology of clustering Linux computers to form a parallel, virtual supercomputer. •one server node ...
... • the use of cluster computing for segmented mirror control. • software for astronomy and wave front control, and • application program - distributed computing (e.g. Fortran 99). •Beowulf Background •technology of clustering Linux computers to form a parallel, virtual supercomputer. •one server node ...
2.4m Telescope Group Yunnan Observatory of CAS
... 2.4m Telescope Group Yunnan Observatory of CAS ***Commissioning Plan, Instrument Testing and Early Science*** ☺ ~6 months of commissioning (weather and instrument unpredicted nature and past ...
... 2.4m Telescope Group Yunnan Observatory of CAS ***Commissioning Plan, Instrument Testing and Early Science*** ☺ ~6 months of commissioning (weather and instrument unpredicted nature and past ...
Chapter 25
... Telescopes can be analyzed by considering them to be two optical elements in a row ...
... Telescopes can be analyzed by considering them to be two optical elements in a row ...
Manufacture of 8.4 m off-axis segments
... more. The GMT segments have a much tighter tolerance on focus because of the need for all seven mirrors to have the same image magnification. The requirement is strictly that the segments must match in radius of curvature rather than that they all have the specified value. While we may be able to ac ...
... more. The GMT segments have a much tighter tolerance on focus because of the need for all seven mirrors to have the same image magnification. The requirement is strictly that the segments must match in radius of curvature rather than that they all have the specified value. While we may be able to ac ...
The Classical Achromat
... are known as the Seidel aberrations, after an 1857 paper by Ludwig von Seidel; the other four are spherical aberration, coma, astigmatism, distortion, and field curvature. Fraunhofer was the first person to systematically eliminate two Seidel aberrations that can plague an image, spherical aberrati ...
... are known as the Seidel aberrations, after an 1857 paper by Ludwig von Seidel; the other four are spherical aberration, coma, astigmatism, distortion, and field curvature. Fraunhofer was the first person to systematically eliminate two Seidel aberrations that can plague an image, spherical aberrati ...
Eliminating the Coriolis Effect in Liquid Mirrors - UBC
... mirrors that it was a cause of concern. In this paper we have shown that the Coriolis effect can in fact be eliminated by a fixed compensating tilt of the axis of rotation of the liquid mirror. A small residual tidal effect was shown to be of no significance to all present and foreseen liquidmirror ...
... mirrors that it was a cause of concern. In this paper we have shown that the Coriolis effect can in fact be eliminated by a fixed compensating tilt of the axis of rotation of the liquid mirror. A small residual tidal effect was shown to be of no significance to all present and foreseen liquidmirror ...
“mathematics toolkit” to support students using the Faulkes Telescope
... carry out in-depth explorations of data obtained from the telescope formed an integral part of nearly all investigations carried out by students. Discussion of this major difference led rapidly to the conclusion that a great many students in the UK simply do not possess the necessary mathematical sk ...
... carry out in-depth explorations of data obtained from the telescope formed an integral part of nearly all investigations carried out by students. Discussion of this major difference led rapidly to the conclusion that a great many students in the UK simply do not possess the necessary mathematical sk ...
The angles are exaggerated so we need to
... The angular magnification, M, (also sometimes called magnifying power) produced by an optical instrument is defined as ...
... The angular magnification, M, (also sometimes called magnifying power) produced by an optical instrument is defined as ...
Problem Sheet
... 4. Use Fermat’s principle to show that a thin lens with thickness given by w = w0 − αy 2 , where y is the distance from the axis, will focus paraxial rays from an object on the axis, and find the focal length as a function of α and the refractive index n. [Hint: the best way to interpret“paraxial” ...
... 4. Use Fermat’s principle to show that a thin lens with thickness given by w = w0 − αy 2 , where y is the distance from the axis, will focus paraxial rays from an object on the axis, and find the focal length as a function of α and the refractive index n. [Hint: the best way to interpret“paraxial” ...
Ch_25
... mirrors are used instead of lenses, as they can be made much larger and with more precision. ...
... mirrors are used instead of lenses, as they can be made much larger and with more precision. ...
Current Status of the Hobby-Eberly Telescope Wide Field
... The Hobby-Eberly Telescope (HET) was originally envisioned as a spectroscopic survey telescope, able to efficiently survey objects over wide areas of the sky. While the telescope has been very successful observing large samples of objects such as quasi-stellar objects (QSOs) spread over the sky with ...
... The Hobby-Eberly Telescope (HET) was originally envisioned as a spectroscopic survey telescope, able to efficiently survey objects over wide areas of the sky. While the telescope has been very successful observing large samples of objects such as quasi-stellar objects (QSOs) spread over the sky with ...
Light T
... *A _____plane____ mirror is a flat sheet of glass that has a smooth silver coating on one side. *Plane mirrors produce a ___virtual_____image which means that the image is right side up. Example: ...
... *A _____plane____ mirror is a flat sheet of glass that has a smooth silver coating on one side. *Plane mirrors produce a ___virtual_____image which means that the image is right side up. Example: ...
SX TransPORT .(English)
... • The Physical path for the UCLP involved the use of CAnet4 (CA) from Pacific Wave to the ManLan (US) facility in New York; the Internet Educational Equal Access Foundation’s (IEEAF, US) trans-Atlantic capacity to the SURFnet, NL GigaPoP in Amsterdam; and one of six GbE paths from the SURFnet GigaPo ...
... • The Physical path for the UCLP involved the use of CAnet4 (CA) from Pacific Wave to the ManLan (US) facility in New York; the Internet Educational Equal Access Foundation’s (IEEAF, US) trans-Atlantic capacity to the SURFnet, NL GigaPoP in Amsterdam; and one of six GbE paths from the SURFnet GigaPo ...
Developments in astronomy
... some of the first photographs. 6. Knowing that lenses disperse and refract light, Sir Isaac Newton experiments with concave mirrors. He constructs the first reflecting telescope. Astronomers are now able to view the solar system in more detail. 7. Cassini space probe is launched. Its mission is to e ...
... some of the first photographs. 6. Knowing that lenses disperse and refract light, Sir Isaac Newton experiments with concave mirrors. He constructs the first reflecting telescope. Astronomers are now able to view the solar system in more detail. 7. Cassini space probe is launched. Its mission is to e ...
OLEARY_2004 - Armagh Observatory
... the drop in magnitude was very large and so the number of pixels recorded was very small, therefore the percentage inaccuracy was very large. This lead to unevenness in the light curve. It is also seen that the light curve is not centred at phase equal to zero. This is due to the fact that I have no ...
... the drop in magnitude was very large and so the number of pixels recorded was very small, therefore the percentage inaccuracy was very large. This lead to unevenness in the light curve. It is also seen that the light curve is not centred at phase equal to zero. This is due to the fact that I have no ...
OLEARY_2004_white
... data. Because the earth is in constant orbit around the sun, the distance from the NN Ser to the earth, and therefore the time taken for the light to reach the earth constantly varies. In order to give accurate timings, many prediction times and records of events are given as the time they occur as ...
... data. Because the earth is in constant orbit around the sun, the distance from the NN Ser to the earth, and therefore the time taken for the light to reach the earth constantly varies. In order to give accurate timings, many prediction times and records of events are given as the time they occur as ...
recent progress in iter diagnostics development in japan
... for feasibility study and optical properties (reflectivity, scattering property of reflective light, etc.) will be studied. - Prototype micro-lens array (100 channels) made of fused silica is produced for feasibility study and optical properties ( the imaging property and the transmissivity, etc. ) ...
... for feasibility study and optical properties (reflectivity, scattering property of reflective light, etc.) will be studied. - Prototype micro-lens array (100 channels) made of fused silica is produced for feasibility study and optical properties ( the imaging property and the transmissivity, etc. ) ...
joseph von fraunhofer (1787-1826)
... high magnifying telescope, and pass quickly through the same. Even with the smoothest movement of the telescope by hand with screws, small oscillations will be introduced, which will be magnified in relation to the magnification of the telescope. Before the telescopes comes to rest, the star will h ...
... high magnifying telescope, and pass quickly through the same. Even with the smoothest movement of the telescope by hand with screws, small oscillations will be introduced, which will be magnified in relation to the magnification of the telescope. Before the telescopes comes to rest, the star will h ...
The Very Basics of Geometric Optics 5.1.2 Basic Geometric Optics
... measure of the size of the lens; see the picture below. Of course, lenses with small NA will not suffer much from spherical aberration but will also not transmit much light and thus produce "dark" pictures. The solution might be aspherical lenses but usually combinations of spherical lenses are used ...
... measure of the size of the lens; see the picture below. Of course, lenses with small NA will not suffer much from spherical aberration but will also not transmit much light and thus produce "dark" pictures. The solution might be aspherical lenses but usually combinations of spherical lenses are used ...
Student Checklist
... ALL mastery checks should be completed, demonstrating mastery (≥ 80%), by the dates indicated. If they are not completed by this time they must be completed after school. Check-Ins must also be completed by the dates indicated. ...
... ALL mastery checks should be completed, demonstrating mastery (≥ 80%), by the dates indicated. If they are not completed by this time they must be completed after school. Check-Ins must also be completed by the dates indicated. ...
Large Astronomical Telescope Development in China
... systems. This is not only the first time ever a Schmidt optical system is achieved in a reflecting telescope whose aperture is larger than 1.34 m, but also the first time to get an variable optical system by unconventional method—active optics. ...
... systems. This is not only the first time ever a Schmidt optical system is achieved in a reflecting telescope whose aperture is larger than 1.34 m, but also the first time to get an variable optical system by unconventional method—active optics. ...
Polarization
... • Polarizing filters are used in Photography, Sunglasses, Science Labs etc. • Usually created by stressing plastics while they are still partially melted, creating a preferred direction of vibration for the molecules. ...
... • Polarizing filters are used in Photography, Sunglasses, Science Labs etc. • Usually created by stressing plastics while they are still partially melted, creating a preferred direction of vibration for the molecules. ...
Buying A Telescope - members.iinet.com.au
... will still give you a clear view is about 50x per inch of aperture, making the upper limit for a 3-inch telescope 150x, and for a 4-inch telescope 200x. Beyond this limit, the image will be faint, fuzzy, and disappointing. How, Then, Do I Select The Best Telescope? The key characteristic of a telesc ...
... will still give you a clear view is about 50x per inch of aperture, making the upper limit for a 3-inch telescope 150x, and for a 4-inch telescope 200x. Beyond this limit, the image will be faint, fuzzy, and disappointing. How, Then, Do I Select The Best Telescope? The key characteristic of a telesc ...
Reflecting telescope
A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter objectives. Almost all of the major telescopes used in astronomy research are reflectors. Reflecting telescopes come in many design variations and may employ extra optical elements to improve image quality or place the image in a mechanically advantageous position. Since reflecting telescopes use mirrors, the design is sometimes referred to as a ""catoptric"" telescope.