PowerPoint
... (inventor unknown) called a reading stone. It was a glass sphere that magnified when laid on top of reading materials. Circa 1284 - Italian, Salvino D'Armate is credited with inventing the first wearable eye glasses. 1590 – Two Dutch eye glass makers, Zaccharias Janssen and son Hans Janssen experime ...
... (inventor unknown) called a reading stone. It was a glass sphere that magnified when laid on top of reading materials. Circa 1284 - Italian, Salvino D'Armate is credited with inventing the first wearable eye glasses. 1590 – Two Dutch eye glass makers, Zaccharias Janssen and son Hans Janssen experime ...
Spherometer - Amateur Astronomers, Inc.
... Now, the limitations in this method are these: that no allowance has been made for friction or air resistance, but chiefest of the objections is a practical one; that mirrors of long focal ratio have but a small sagitta from which comes the motive force for propelling the sphere or cylinder, and upo ...
... Now, the limitations in this method are these: that no allowance has been made for friction or air resistance, but chiefest of the objections is a practical one; that mirrors of long focal ratio have but a small sagitta from which comes the motive force for propelling the sphere or cylinder, and upo ...
How to Use This Presentation
... mirror to gather and focus light from distant objects • In the mid-1600s Isaac Newton solved the problem of color separation that resulted from the use of lenses. • When light enters a reflecting telescope, the light is reflected by a large curved mirror to a second mirror. The second mirror reflect ...
... mirror to gather and focus light from distant objects • In the mid-1600s Isaac Newton solved the problem of color separation that resulted from the use of lenses. • When light enters a reflecting telescope, the light is reflected by a large curved mirror to a second mirror. The second mirror reflect ...
The TMT LGSF Launch Telescope Assembly System
... Deformation of the objective lens convex surface while the zenith angle 1°: The biggest deformation is the top and the edge of the surface, and the PV=106.7nm ...
... Deformation of the objective lens convex surface while the zenith angle 1°: The biggest deformation is the top and the edge of the surface, and the PV=106.7nm ...
MAPLE: Reflected Light from Exoplanets with a 50
... and the size/quality of all subsequent optics in the train. The optical design is based on a 50 cm aperture triSchiefspiegler telescope. The design uses 3 spherical mirrors (M1, M2, M3), greatly simplifying manufacture; the spherical mirrors can be fabricated with very small micro-roughness and mid- ...
... and the size/quality of all subsequent optics in the train. The optical design is based on a 50 cm aperture triSchiefspiegler telescope. The design uses 3 spherical mirrors (M1, M2, M3), greatly simplifying manufacture; the spherical mirrors can be fabricated with very small micro-roughness and mid- ...
Nulling Interferometry A technique for blocking the light of a bright
... • Wallace, K., Hardy, G., and Serabyn, E. 2000, Nature, 406, 700, “Deep and stable interferometric nulling of broadband light with implications for observing planets around nearby ...
... • Wallace, K., Hardy, G., and Serabyn, E. 2000, Nature, 406, 700, “Deep and stable interferometric nulling of broadband light with implications for observing planets around nearby ...
Talk, ppt
... simultaneous recording of the Stocks parameters the separating the input light flux in the amplitude or the pupil is necessary. However, none of the methods of separation of the amplitude can not provide a wide FOV and a wide spectral range simultaneously. Therefore, we propose a scheme with the div ...
... simultaneous recording of the Stocks parameters the separating the input light flux in the amplitude or the pupil is necessary. However, none of the methods of separation of the amplitude can not provide a wide FOV and a wide spectral range simultaneously. Therefore, we propose a scheme with the div ...
329_ryan - New Mexico Institute of Mining and Technology
... The Magdalena Ridge Observatory 2.4-meter telescope facility (operated by the New Mexico Institute of Mining and Technology) will be used for this task. The observatory researchers have extensive experience tracking fast-moving natural and manmade objects in orbit, and this pilot project will allow ...
... The Magdalena Ridge Observatory 2.4-meter telescope facility (operated by the New Mexico Institute of Mining and Technology) will be used for this task. The observatory researchers have extensive experience tracking fast-moving natural and manmade objects in orbit, and this pilot project will allow ...
Meade® Illuminated Reticle Eyepiece Systems
... advanced features, to suit any observing requirement. These special-purpose eyepieces include reticles with phosphorescent-etched crossline patterns, internally redilluminated so that the lines are clearly visible against a dark sky. All eyepieces are 1.25" O.D. Series 4000 Plössl 9mm Illuminated Re ...
... advanced features, to suit any observing requirement. These special-purpose eyepieces include reticles with phosphorescent-etched crossline patterns, internally redilluminated so that the lines are clearly visible against a dark sky. All eyepieces are 1.25" O.D. Series 4000 Plössl 9mm Illuminated Re ...
Document
... • A diffraction grating can be thought of as an optical component that has tiny grooves cut into it. The grooves are cut so small that their measurements approach the wave length of light. ...
... • A diffraction grating can be thought of as an optical component that has tiny grooves cut into it. The grooves are cut so small that their measurements approach the wave length of light. ...
Telescope Control Issues with TheSky and Telescopes That Use
... the one star alignment mode. Typically, this procedure achieves better synchronization results. ...
... the one star alignment mode. Typically, this procedure achieves better synchronization results. ...
香港考試局
... Correction of Eye Defects 37. A long-sighted person’s shortest distance of distinct vision is 1.5 m. His sight is improved by wearing spectacles which decrease his shortest distance of distinct vision to 0.9 m. What is the magnitude of the focal length of the spectacle lenses? A. 0.56 m. B. 0.60 m. ...
... Correction of Eye Defects 37. A long-sighted person’s shortest distance of distinct vision is 1.5 m. His sight is improved by wearing spectacles which decrease his shortest distance of distinct vision to 0.9 m. What is the magnitude of the focal length of the spectacle lenses? A. 0.56 m. B. 0.60 m. ...
Astronomy Today
... Can Astronomers… • Take a star into a lab and dissect it? • Make a solar system by combining chemicals in test tubes? • Send instruments to the inside of the Sun or planets? • Watch a star like the Sun evolve over its 10,000,000,000 year lifetime? ...
... Can Astronomers… • Take a star into a lab and dissect it? • Make a solar system by combining chemicals in test tubes? • Send instruments to the inside of the Sun or planets? • Watch a star like the Sun evolve over its 10,000,000,000 year lifetime? ...
06_Testbank - Lick Observatory
... 10) Explain what an interferometer is and give an example. Answer: Interferometers are groups of telescopes that have been linked together and interfere the light waves that they receive to achieve the same angular resolution (but not the collecting area) as a much larger telescope. An example is t ...
... 10) Explain what an interferometer is and give an example. Answer: Interferometers are groups of telescopes that have been linked together and interfere the light waves that they receive to achieve the same angular resolution (but not the collecting area) as a much larger telescope. An example is t ...
Cubs worksheet
... These planets are so far away from the Sun, that you’d have to go all the way into the Jodrell Bank Gardens to find them! (But don’t do this now!) 11. Are the planets in the Solar System spaced out evenly? ______________________________________________ The first four planets we came across were made ...
... These planets are so far away from the Sun, that you’d have to go all the way into the Jodrell Bank Gardens to find them! (But don’t do this now!) 11. Are the planets in the Solar System spaced out evenly? ______________________________________________ The first four planets we came across were made ...
Stops, Pupils, Field Optics and Cameras
... The optical system above transfers an upright, one-to-one image Either lens 1, or lens 2 may be thought of as the aperture stop, since both define the same cone as seen from the image point A Lens 2 defines the field stop One can show that the diameter of the entrance window is 1/3 the diameter of ...
... The optical system above transfers an upright, one-to-one image Either lens 1, or lens 2 may be thought of as the aperture stop, since both define the same cone as seen from the image point A Lens 2 defines the field stop One can show that the diameter of the entrance window is 1/3 the diameter of ...
Glass Mirrors by cold slumping to cover 100 m2 of the MAGIC II
... 2. THE REFLECTOR OF MAGIC II In order to maintain the temporal structure of the few nanosecond signal from a Cherenkov flash of the electro-magnetic shower, the overall profile of the reflector is an almost parabolic configuration, with a focal length of 17 m and focal ratio f/D=1. Davies-Cotton re ...
... 2. THE REFLECTOR OF MAGIC II In order to maintain the temporal structure of the few nanosecond signal from a Cherenkov flash of the electro-magnetic shower, the overall profile of the reflector is an almost parabolic configuration, with a focal length of 17 m and focal ratio f/D=1. Davies-Cotton re ...
Astronomical Telescope
... be attached to the main telescope by a bracket that will have either three or six radially spaced adjusting screws: if yours is of the latter type, adjust the front three screws to permit the tube of the Finder to be held centrally in the bracket. Once this has been achieved, check that the target i ...
... be attached to the main telescope by a bracket that will have either three or six radially spaced adjusting screws: if yours is of the latter type, adjust the front three screws to permit the tube of the Finder to be held centrally in the bracket. Once this has been achieved, check that the target i ...
Optical telescope
An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.There are three primary types of optical telescope: refractors, which use lenses (dioptrics) reflectors, which use mirrors (catoptrics) catadioptric telescopes, which combine lenses and mirrorsA telescope's light gathering power and ability to resolve small detail is directly related to the diameter (or aperture) of its objective (the primary lens or mirror that collects and focuses the light). The larger the objective, the more light the telescope collects and the finer detail it resolves.People use telescopes and binoculars for activities such as observational astronomy, ornithology, pilotage and reconnaissance, and watching sports or performance arts.