Finite number of Guide Star
... • To circumvent the sky coverage problem, several ways have been devised and are actively pursued: 1. Multi-Conjugate Adaptive Optics (MCAO) 2. Multi Object Adaptive Optics (MOAO) 3. Ground Layer Adaptive Optics (GLAO) 4. Laser Tomography Adaptive Optics (LTAO) ...
... • To circumvent the sky coverage problem, several ways have been devised and are actively pursued: 1. Multi-Conjugate Adaptive Optics (MCAO) 2. Multi Object Adaptive Optics (MOAO) 3. Ground Layer Adaptive Optics (GLAO) 4. Laser Tomography Adaptive Optics (LTAO) ...
Design of a spherical focal surface using close
... Received 22 Jun 2011; revised 21 Jul 2011; accepted 22 Jul 2011; published 8 Aug 2011 ...
... Received 22 Jun 2011; revised 21 Jul 2011; accepted 22 Jul 2011; published 8 Aug 2011 ...
Julie Cass - Stanford University
... Owing to the chromatic aberrations, the "focal length" specified for the lens is no longer the point of smallest beam radius. Instead, we defined a new adjusted focal length as the point at where the tightest beam waist is located. Through use of the Merit Function Editor in ZEMAX, system parameter ...
... Owing to the chromatic aberrations, the "focal length" specified for the lens is no longer the point of smallest beam radius. Instead, we defined a new adjusted focal length as the point at where the tightest beam waist is located. Through use of the Merit Function Editor in ZEMAX, system parameter ...
Micki s report in MS Word format.
... Polaris Monitoring Project Polaris, the brightest star of the constellation Ursa Minoris is located at the tip of the handle of the Little Dipper. As the brightest of all Cepheid Variables, many astronomers have closely monitored Polaris in the past. Beginning after 1945, such astronomers noticed a ...
... Polaris Monitoring Project Polaris, the brightest star of the constellation Ursa Minoris is located at the tip of the handle of the Little Dipper. As the brightest of all Cepheid Variables, many astronomers have closely monitored Polaris in the past. Beginning after 1945, such astronomers noticed a ...
Asiago_2012_NEON_Hook
... • A concave spherical mirror suffers from severe spherical aberration and has limited use without additional optics (more about this later) • A concave paraboloid focuses light to a perfect image on its axis but suffers from coma (~1/F2) and astigmatism off-axis • For long focal ratios (f/4 and grea ...
... • A concave spherical mirror suffers from severe spherical aberration and has limited use without additional optics (more about this later) • A concave paraboloid focuses light to a perfect image on its axis but suffers from coma (~1/F2) and astigmatism off-axis • For long focal ratios (f/4 and grea ...
Starlight Xpress Ltd
... Recording your first image: We now have the camera and computer set up to take pictures, but an optical system is needed to project an image onto the CCD surface. You could use your telescope, but this introduces additional complications, which are best avoided at this early stage. There are two sim ...
... Recording your first image: We now have the camera and computer set up to take pictures, but an optical system is needed to project an image onto the CCD surface. You could use your telescope, but this introduces additional complications, which are best avoided at this early stage. There are two sim ...
Meade Wireless Telescope Server Setup Guide - Meade
... The MEADE Wireless Telescope Server provides a brand new and unique hardware solution to remotely connect and control your telescope, CCD-camera, DSLR and many more accessories with your PC in your living room. The MEADE WTS 1.0 is, as far as we know, the first product worldwide that can be used as ...
... The MEADE Wireless Telescope Server provides a brand new and unique hardware solution to remotely connect and control your telescope, CCD-camera, DSLR and many more accessories with your PC in your living room. The MEADE WTS 1.0 is, as far as we know, the first product worldwide that can be used as ...
evolution of the foucault-secretan reflecting telescope
... maker Marc Secretan. Almost immediately, they began selling 4- and 8-(French)-inch Newtonian telescopes in wooden tubes to amateurs. Several 4-inch examples have survived. As Foucault attempted to make larger diameters he moved from spherical to paraboloidal mirrors and developed tests to determine ...
... maker Marc Secretan. Almost immediately, they began selling 4- and 8-(French)-inch Newtonian telescopes in wooden tubes to amateurs. Several 4-inch examples have survived. As Foucault attempted to make larger diameters he moved from spherical to paraboloidal mirrors and developed tests to determine ...
Site testing for the Discovery Channel Telescope
... In order to gauge the effectiveness of the DIMM system in characterizing the DCT site, we were interested in crosscalibrating seeing measurements with a large scientific telescope of well-known, high-quality imaging characteristics. The Lowell site test system was transported to Kitt Peak in June 20 ...
... In order to gauge the effectiveness of the DIMM system in characterizing the DCT site, we were interested in crosscalibrating seeing measurements with a large scientific telescope of well-known, high-quality imaging characteristics. The Lowell site test system was transported to Kitt Peak in June 20 ...
ZERODUR ® - Catalogue
... extremely low coefficient of thermal expansion (CTE) for a wide range of temperatures • Excellent CTE homogeneity throughout its entire volume • Very low level of imperfections • A wide range of precise geometrical shapes are possible using grinding processes • An extremely smooth surface is pos ...
... extremely low coefficient of thermal expansion (CTE) for a wide range of temperatures • Excellent CTE homogeneity throughout its entire volume • Very low level of imperfections • A wide range of precise geometrical shapes are possible using grinding processes • An extremely smooth surface is pos ...
Sunlight Glinting from Water: not a hazard for WFC3 IR
... The brightness and duration of glints The specular reflectivity of light from and air-water interface (Figure 1) can be estimated with Fresnel’s law; a plot of the reflectivity of water as a function of angle of incidence is available in McCullough (2006). Notably, the reflectivity averaged over two ...
... The brightness and duration of glints The specular reflectivity of light from and air-water interface (Figure 1) can be estimated with Fresnel’s law; a plot of the reflectivity of water as a function of angle of incidence is available in McCullough (2006). Notably, the reflectivity averaged over two ...
Woofer-Tweeter Adaptive Optics for Astronomy
... optics was used to pre-correct for horizontal path aberrations and allow high power laser beams to focus on a distant target. One of the first AO systems to be employed in this task used a segmented deformable mirror and multi-dither algorithms to achieve phase correction. A far more challenging app ...
... optics was used to pre-correct for horizontal path aberrations and allow high power laser beams to focus on a distant target. One of the first AO systems to be employed in this task used a segmented deformable mirror and multi-dither algorithms to achieve phase correction. A far more challenging app ...
Sensor Modeling and Demonstration of a Multi-Object Spectrometer for Performance-Driven Sensing
... deflected towards the spectroscopy channel. Third, the light is sent through the spectrometry channel collimator, dispersed by the transmission grating, reimaged, exposed onto the spectrometry CCD detector, and differenced from a dark frame. Since the dispersion is simply the convolution of the pup ...
... deflected towards the spectroscopy channel. Third, the light is sent through the spectrometry channel collimator, dispersed by the transmission grating, reimaged, exposed onto the spectrometry CCD detector, and differenced from a dark frame. Since the dispersion is simply the convolution of the pup ...
- River Bend Astronomy Club
... his roll-off roof observatories and soon two telescopes — a 0.5-m f/4.8 standard two-mirror Newtonian and a .12-m f/5 refractor — begin scanning the sky. Juels says of these automated eyes that “We probably operate about two-thirds of the nights that the weather is good and the moon is not bright. T ...
... his roll-off roof observatories and soon two telescopes — a 0.5-m f/4.8 standard two-mirror Newtonian and a .12-m f/5 refractor — begin scanning the sky. Juels says of these automated eyes that “We probably operate about two-thirds of the nights that the weather is good and the moon is not bright. T ...
CIN_602
... TiPi utilizes up to 8 laser guide stars (provided by LGSF) and 3 natural low-order wavefront sensor guide stars to drive the woofer DM. Each of the natural low-order guide stars is compensated with a MEMS-DM, allowing fainter guide star use and providing nearly full sky coverage (Issues S5 and E5). ...
... TiPi utilizes up to 8 laser guide stars (provided by LGSF) and 3 natural low-order wavefront sensor guide stars to drive the woofer DM. Each of the natural low-order guide stars is compensated with a MEMS-DM, allowing fainter guide star use and providing nearly full sky coverage (Issues S5 and E5). ...
detailed overview presentation
... A lower power Laser Source to achieve the same lethality as that of a system with a lower laser power source. A smaller Beam Director to achieve the same lethality and better surveillance capabilities as that of a system with a larger Beam Director. ...
... A lower power Laser Source to achieve the same lethality as that of a system with a lower laser power source. A smaller Beam Director to achieve the same lethality and better surveillance capabilities as that of a system with a larger Beam Director. ...
Galileo galilei
... Galileo Galilei is an Italian astrometry. He started being an astrometry in the year of 1504. Did you know how he did it? It started when he heard about the new invention from Holland, telescope. He was interested with the telescope, so he decided to make his own telescope. When Galileo Galilei star ...
... Galileo Galilei is an Italian astrometry. He started being an astrometry in the year of 1504. Did you know how he did it? It started when he heard about the new invention from Holland, telescope. He was interested with the telescope, so he decided to make his own telescope. When Galileo Galilei star ...
The Unique Optical Design of the NESSI Survey Telescope
... by Harland Epps and built and operated by John McGraw and Roger Angel [1]. The CTI primary mirror was the proof of concept mirror for the NASA space telescope project. The mirror was never intended to fly and was built sub-scale with an aperture of 1.8m. It featured an f=2.2 parabolic surface figure ...
... by Harland Epps and built and operated by John McGraw and Roger Angel [1]. The CTI primary mirror was the proof of concept mirror for the NASA space telescope project. The mirror was never intended to fly and was built sub-scale with an aperture of 1.8m. It featured an f=2.2 parabolic surface figure ...
Estimating the Cost of Extremely Large Telescopes
... As telescope builders contemplate an order of magnitude increase in the size of giant optical/infrared (OIR) telescopes, cost control has become the most important factor in the success of these projects. The current generation of large OIR telescopes, constructed over the past 15 years, has require ...
... As telescope builders contemplate an order of magnitude increase in the size of giant optical/infrared (OIR) telescopes, cost control has become the most important factor in the success of these projects. The current generation of large OIR telescopes, constructed over the past 15 years, has require ...
Wavefront Aberrations
... image Sagittal rays For the figure above, the object point is vertically offaxis. The tangential plane is the plane of the paper and the sagittal plane is perpendicular to this plane. The rays diverging from the object point in the tangential plane are imaged as a line perpendicular to the plane of ...
... image Sagittal rays For the figure above, the object point is vertically offaxis. The tangential plane is the plane of the paper and the sagittal plane is perpendicular to this plane. The rays diverging from the object point in the tangential plane are imaged as a line perpendicular to the plane of ...
5. System Engineering
... system to specified disturbances (e.g. a change of environmental condition or of a specific design characteristics). By using mathematical models along with advanced analysis tools and simulation environments, the system design and performance can be evaluated before construction begins. OWL as a co ...
... system to specified disturbances (e.g. a change of environmental condition or of a specific design characteristics). By using mathematical models along with advanced analysis tools and simulation environments, the system design and performance can be evaluated before construction begins. OWL as a co ...
and the matrix
... This book represents an alternative approach to that found in most standard texts to the study of image formation by spherical surfaces. As such it complements the usual treatment and may well be used along with another text. The text "Fundamentals of Optics" by F. A. Jenkins and H. E. White (Toront ...
... This book represents an alternative approach to that found in most standard texts to the study of image formation by spherical surfaces. As such it complements the usual treatment and may well be used along with another text. The text "Fundamentals of Optics" by F. A. Jenkins and H. E. White (Toront ...
Messages for the plenary session
... - Texas A & M University - The Pennsylvania State University - University of California at Davis - University of California at Irvine - University of Illinois at UrbanaChampaign - University of Michigan - University of Pennsylvania - University of Pittsburgh - Vanderbilt University ...
... - Texas A & M University - The Pennsylvania State University - University of California at Davis - University of California at Irvine - University of Illinois at UrbanaChampaign - University of Michigan - University of Pennsylvania - University of Pittsburgh - Vanderbilt University ...
A Bluetooth Telescope Controller - ATM
... These days, any off-the-shelf telescope with some self-esteem has a goto controller. Any Amateur Telescope Maker with as much self esteem would like to build such a controller himself. To realize this, he can base his project on a worked-out possibility available on the web. One of these systems is ...
... These days, any off-the-shelf telescope with some self-esteem has a goto controller. Any Amateur Telescope Maker with as much self esteem would like to build such a controller himself. To realize this, he can base his project on a worked-out possibility available on the web. One of these systems is ...
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.