Optical Telescope TechnologyScientific and Technical Information Division, National Aeronautics and Space Administration, 1970 - 783 էջ Design optics and technology for large spaceborne astronomical telescopes. |
From inside the book
Արդյունքներ 100–ի 1-ից 5-ը:
Էջ 1
... problems of optical telescope technology . Having spent almost three years in the project management of the Apollo Telescope Mount Project , which will deploy and operate several solar telescopes in orbit , we have great appreciation ...
... problems of optical telescope technology . Having spent almost three years in the project management of the Apollo Telescope Mount Project , which will deploy and operate several solar telescopes in orbit , we have great appreciation ...
Էջ 3
... problems . Among those recognized at its inception were : ( 1 ) the stability and control problem , particularly the development of star trackers , ( 2 ) the development of an ultraviolet TV tube , and ( 3 ) the development of ...
... problems . Among those recognized at its inception were : ( 1 ) the stability and control problem , particularly the development of star trackers , ( 2 ) the development of an ultraviolet TV tube , and ( 3 ) the development of ...
Էջ 5
... problems . We not only have that problem in space but also have a much broader problem in that we are dealing not with a wavelength range from 3000 angstroms to perhaps 10,000 angstroms but with a wave- length range of from hundreds of ...
... problems . We not only have that problem in space but also have a much broader problem in that we are dealing not with a wavelength range from 3000 angstroms to perhaps 10,000 angstroms but with a wave- length range of from hundreds of ...
Էջ 8
... problem . In fact , while we do not usually think of the sun as being very faint , the same problems also apply to the sun . To obtain small detail on the sun , which we must have to understand the physics of what is going on , we need ...
... problem . In fact , while we do not usually think of the sun as being very faint , the same problems also apply to the sun . To obtain small detail on the sun , which we must have to understand the physics of what is going on , we need ...
Էջ 13
... problem areas requiring attention . The sources of radiation include planets , stars , gaseous nebulae , clusters , x - ray stars , galaxies , and quasars as well as the general sky background against which these signals are to be ...
... problem areas requiring attention . The sources of radiation include planets , stars , gaseous nebulae , clusters , x - ray stars , galaxies , and quasars as well as the general sky background against which these signals are to be ...
Այլ խմբագրություններ - View all
Common terms and phrases
alignment analysis angle angstroms aperture applied arc second array astronomical axis beam beryllium calibration Cer-Vit chamber collimator command configuration curve dark current detector developed diameter dynamic electron elements energy environment equipment experiment package facility film filter flux frequency function gimbal heat pipes inches infrared input instrument irradiance Kitt Peak layer lens light load material measurements ment microns mission mode module mounted nanoamperes Observatory obtained operation optical orbit Orbiting Astronomical Observatory p-n junction percent performance photocathode plate Plumbicon primary mirror problem protons pumps radiation ratio reflectance resolution scanning SEC camera tube SEC target secondary mirror sensor shown in figure signal simulation solar spacecraft spectral stability star trackers stresses structure surface tape techniques temperature thermal thickness tion torque transmission ultraviolet vacuum vehicle vibration vidicon voltage wavelength
Սիրված հատվածներ
Էջ 261 - Evaluation of Multipoint Interaction in the Design of a Thin Diffraction-Limited Active Mirror.
Էջ 589 - ... A low energy electron beam scans the surface of the silicon depositing charge such that the p-regions exposed to the beam are brought to cathode potential. Thus pn junctions are reverse biased by the beam. During the time that the electron beam is not on an element, the reverse bias voltage across the pn junction decreases as the result of transfer of charge across the junction. This charge arises from either internal generation of free carriers in the material or by photoexcited carriers in...
Էջ 187 - It is the purpose of this discussion to point out some of the possibilities of teaching shop processes in this manner. As Mr. Hesse indicated, "Shop Processes" is an extensive subject and its teaching must be regarded as a continuous project.
Էջ viii - Application of finite element techniques to the design and manufacture of astronomical mirrors...
Էջ 621 - Laboratory for Astrophysics and Space Research of the Enrico Fermi Institute for Nuclear Studies at the University of Chicago — one of the first such university centers in the country. Here, in the sub-basement, in a concrete-shielded counting laboratory, scientists measure radioactivity of meteorites and "space dust" scraped from space flight capsules.
Էջ 296 - Cowper, GR: The Shear Coefficient in Timoshenko's Beam Theory.
Էջ 326 - March 1967. 9. Koopmans, TC, ed.: Activity Analysis of Production and Allocation. Cowles Commission, University of Chicago, 1951.
Էջ 241 - It is convenient in computation to use the same numbering system for bars, torsion bars, and joints. So far in these developments bars have been referred to as a and b. Referring to the numbering system shown above, it will be recognized that in reality a becomes i and b becomes i+1.
Էջ 392 - The two 150-inch telescopes for the Kitt Peak National Observatory and the Cerro Tololo Inter-American Observatory in Chile have solid mirrors of fused silica and Cer-Vit, respectively.
Էջ 679 - ... high cost for large aperture systems. Digital processing has the advantages of being extremely flexible, rather trouble-free and easy to use, once the programming system has been worked out. It also has the ability to handle problems which are nonlinear in both intensity and geometry and can solve these with an accuracy limited only by the user's knowledge of the incoming data. To...