Telescopes - Fort Lewis College
... Reflectors • Assembly Demonstration • Advantages • can make mirrors bigger (can support them from the back) • Reflection only on surface (colors focus together) • Only need one optical surface (lenses require at least two) ...
... Reflectors • Assembly Demonstration • Advantages • can make mirrors bigger (can support them from the back) • Reflection only on surface (colors focus together) • Only need one optical surface (lenses require at least two) ...
Chapter 9 Notes
... Astronomical mirrors Many large telescopes use curved mirrors. Here is a common design. ...
... Astronomical mirrors Many large telescopes use curved mirrors. Here is a common design. ...
spacese.spacegrant.org
... the US Air Force to study ways to build lightweight mirrors. Based on the ASMD studies, two test mirrors were built and fully tested. One was made from beryllium by Ball Aerospace; the other was built by Kodak (now ITT) and was made from a special type of glass. A team of experts was chosen to test ...
... the US Air Force to study ways to build lightweight mirrors. Based on the ASMD studies, two test mirrors were built and fully tested. One was made from beryllium by Ball Aerospace; the other was built by Kodak (now ITT) and was made from a special type of glass. A team of experts was chosen to test ...
doc - IRAM
... Chopped or “wobbled” mode was invented for mono pixel instruments. For many pixels its use may not be advantageous (fast readout or DC coupling). What are technical options for a multiband instrument ? 3rd discussion Short answer/summary: Use warm or cold dichroics allowing for several focal plane ...
... Chopped or “wobbled” mode was invented for mono pixel instruments. For many pixels its use may not be advantageous (fast readout or DC coupling). What are technical options for a multiband instrument ? 3rd discussion Short answer/summary: Use warm or cold dichroics allowing for several focal plane ...
Lenses PPT
... Refracting telescopes are comprised of two convex lenses. The objective lens collects light from a distant source, converging it to a focus and forming a real, inverted image inside the telescope. The objective lens needs to be fairly large in order to have enough light-gathering power so that the f ...
... Refracting telescopes are comprised of two convex lenses. The objective lens collects light from a distant source, converging it to a focus and forming a real, inverted image inside the telescope. The objective lens needs to be fairly large in order to have enough light-gathering power so that the f ...
Document
... tip-tilt. After feedback on telescope main axes a residual jitter ~0.3 RMS is expected. ...
... tip-tilt. After feedback on telescope main axes a residual jitter ~0.3 RMS is expected. ...
Slide 1
... infrared radiation. Objects at very high temperatures (millions of degrees Celsius) emit most of their energy as x-rays. ...
... infrared radiation. Objects at very high temperatures (millions of degrees Celsius) emit most of their energy as x-rays. ...
On Artificially Creating Solar Eclipses Abstract
... predicted by general theory of relativity. As an artificial moon we may use any spherical body of appropriate size and made up of any solid material. Its surface can be perfectly reflecting or tar black. It can have topography matching with the topography of moon, or, otherwise. We now proceed to gi ...
... predicted by general theory of relativity. As an artificial moon we may use any spherical body of appropriate size and made up of any solid material. Its surface can be perfectly reflecting or tar black. It can have topography matching with the topography of moon, or, otherwise. We now proceed to gi ...
Initial concepts for CELT adaptive optics
... correctors might or might not share a global woofer mirror, such as an adaptive telescope secondary. The advantages of MOAO include a reduction in the number of science reflections (which increases throughput and can reduce emissivity), more compact packaging (due to the relatively small field of vi ...
... correctors might or might not share a global woofer mirror, such as an adaptive telescope secondary. The advantages of MOAO include a reduction in the number of science reflections (which increases throughput and can reduce emissivity), more compact packaging (due to the relatively small field of vi ...
Module P6.4 Optical instruments
... 2.2 Aberrations of lenses and mirrors In elementary discussions of optical systems it is usually assumed that the system is ‘ideal’. By this we mean: o that lenses and mirrors have perfectly formed spherical surfaces, o that all objects lie very close to the optical axis, o that all rays involved m ...
... 2.2 Aberrations of lenses and mirrors In elementary discussions of optical systems it is usually assumed that the system is ‘ideal’. By this we mean: o that lenses and mirrors have perfectly formed spherical surfaces, o that all objects lie very close to the optical axis, o that all rays involved m ...
MS-Word format - Eyes-on-the
... system. If a binocular lens (or small parabolic mirror) and a small first surface mirror are already available, a spectroscope can be built for not much more than the cost of a diffraction grating. The following article describes two designs that use mounts built from easily worked, modeling plywood ...
... system. If a binocular lens (or small parabolic mirror) and a small first surface mirror are already available, a spectroscope can be built for not much more than the cost of a diffraction grating. The following article describes two designs that use mounts built from easily worked, modeling plywood ...
Photometry - University of Groningen
... Photometric standard systems • Goal: putting mags on common scale • Standard system= – telescope+filter+detector ...
... Photometric standard systems • Goal: putting mags on common scale • Standard system= – telescope+filter+detector ...
Focus and pointing adjustments necessary for laser guide star
... commands are sent to the DM to correct sensed wavefront errors. However, several characteristics of the LGS differ from the NGS, and not all wavefront errors visible in an NGS are visible in an LGS. At Keck, the use of off-axis laser projection complicates the laser pointing model. Focus complicatio ...
... commands are sent to the DM to correct sensed wavefront errors. However, several characteristics of the LGS differ from the NGS, and not all wavefront errors visible in an NGS are visible in an LGS. At Keck, the use of off-axis laser projection complicates the laser pointing model. Focus complicatio ...
Emission Spectrum and Planck`s Constant
... Some of the following content has been adapted from PASCO: “Instruction Manual and Experiment Guide for the PASCO scientific Model SP-9268A - STUDENT SPECTROMETER.” Using the dispersion principle of grating or a prism, a spectrometer separates white light into various colors by refracting light of v ...
... Some of the following content has been adapted from PASCO: “Instruction Manual and Experiment Guide for the PASCO scientific Model SP-9268A - STUDENT SPECTROMETER.” Using the dispersion principle of grating or a prism, a spectrometer separates white light into various colors by refracting light of v ...
Evaluation and application of spatial light modulators for
... enables a more advanced adaption of light fields and an almost total control of complex wave fronts. Following the current trend in image analysis more flexibility in the analysis strategy is obtained by combining the classical data driven bottom-up strategy with the so-called expectation driven top ...
... enables a more advanced adaption of light fields and an almost total control of complex wave fronts. Following the current trend in image analysis more flexibility in the analysis strategy is obtained by combining the classical data driven bottom-up strategy with the so-called expectation driven top ...
Copyright 2003 Society of Photo-Optical Instrumentation Engineers
... Most opto-mechanical instruments are sensitive to thermal influences: the light path changes with changing ambient temperature of the components in the system. Some instruments, e.g. those using interferometry, are more sensitive than others because of high stability tolerances. In an interferometer ...
... Most opto-mechanical instruments are sensitive to thermal influences: the light path changes with changing ambient temperature of the components in the system. Some instruments, e.g. those using interferometry, are more sensitive than others because of high stability tolerances. In an interferometer ...
Laboratory for AO at UCSC
... 2.0 arcminutes) has increased. The James Webb Space Telescope purports to deliver this quality of imaging as well as integral-field unit (IFU) type spectroscopy redder than 2 microns with a 6.5 meter aperture. The superb Hubble Space Telescope will be refurbished in 2008 with the Wide Field Camera 3 ...
... 2.0 arcminutes) has increased. The James Webb Space Telescope purports to deliver this quality of imaging as well as integral-field unit (IFU) type spectroscopy redder than 2 microns with a 6.5 meter aperture. The superb Hubble Space Telescope will be refurbished in 2008 with the Wide Field Camera 3 ...
2006 04 LAAS Bulletin I.pub
... few months it had come within 5.7 million miles of the earth, then after passing the earth it approached the sun just within earth’s orbit before roaming out just beyond Jupiter’s orbit. Fig 5: The Foucault 80 cm (31.5 inch) reflecting telescope at the Marseilles Observatory. Foucault invented the k ...
... few months it had come within 5.7 million miles of the earth, then after passing the earth it approached the sun just within earth’s orbit before roaming out just beyond Jupiter’s orbit. Fig 5: The Foucault 80 cm (31.5 inch) reflecting telescope at the Marseilles Observatory. Foucault invented the k ...
Design of the the Fiber bundles B and C
... Ideally, the bottom part and the lid should meet exactly, and leave no play for the fibres, but as can be seen from the figure above the bottom and top micro V-block does not meet. There is a gap of 30 microns between them. The reason is that the V-blocks were ordered for a small fibre diameter of 1 ...
... Ideally, the bottom part and the lid should meet exactly, and leave no play for the fibres, but as can be seen from the figure above the bottom and top micro V-block does not meet. There is a gap of 30 microns between them. The reason is that the V-blocks were ordered for a small fibre diameter of 1 ...
443 KB Grinding metre scale mirror segments for the E
... telescopes. Monolithic mirrors are limited to around 10 m for reasons of manufacturing, measurement, and transportation. Consequently segmented mirror technology, as applied to the Keck telescopes has become the main basis for scaling up. EELT – figure 1 - and TMT are next generation ground based te ...
... telescopes. Monolithic mirrors are limited to around 10 m for reasons of manufacturing, measurement, and transportation. Consequently segmented mirror technology, as applied to the Keck telescopes has become the main basis for scaling up. EELT – figure 1 - and TMT are next generation ground based te ...
The GMT-Consortium Large Earth Finder (G
... focal plane. The error signal that FCC generates is used to servo the position of a tip-tilt mirror that serves as the G-CLEF fold/tertiary. Flexure, elevation dependent deformation and thermal expansion have large time-constants, so the sampling time of the FCC control loop is extremely long. Since ...
... focal plane. The error signal that FCC generates is used to servo the position of a tip-tilt mirror that serves as the G-CLEF fold/tertiary. Flexure, elevation dependent deformation and thermal expansion have large time-constants, so the sampling time of the FCC control loop is extremely long. Since ...
Exploring the Universe and Our Origins - from Hubble to JWST!
... There are 5 Lpoints, JWST is going to “L2” Not much spacecraft fuel is needed to keep JWST in orbit here! Far away from earth = very dark sky! ...
... There are 5 Lpoints, JWST is going to “L2” Not much spacecraft fuel is needed to keep JWST in orbit here! Far away from earth = very dark sky! ...
MNRAS_Vol_ 71_9_719
... the fixed support for carrying tho dal'k RUde. It iH p()rhaps unnecessary to give the details of construction of this part of the apparatus, but some description may be given of the slits, which are of primary importance in spectroheliograph design. Both camera and collimator slits are fixed in widt ...
... the fixed support for carrying tho dal'k RUde. It iH p()rhaps unnecessary to give the details of construction of this part of the apparatus, but some description may be given of the slits, which are of primary importance in spectroheliograph design. Both camera and collimator slits are fixed in widt ...
Michelson Interferometer
... their celebrated series of experiments designed to demonstrate the existence of the ether. It is still an important instrument in today's laboratories and it is being widely used as an instrument for measuring the wavelength of an unknown light source, to measure extremely small distance and for inv ...
... their celebrated series of experiments designed to demonstrate the existence of the ether. It is still an important instrument in today's laboratories and it is being widely used as an instrument for measuring the wavelength of an unknown light source, to measure extremely small distance and for inv ...
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.