NBS Technical NoteU.S. Government Printing Office, 1981 |
From inside the book
Results 1-5 of 47
Page 33
... ) suggests , the lens brings about an increase of irradiance as the result of two factors : reduced reflection loss and decreased spreading of the beam refracted at the surface of the GaAs . R t n = 3.3 1.7 1 Figure Cla . 333.
... ) suggests , the lens brings about an increase of irradiance as the result of two factors : reduced reflection loss and decreased spreading of the beam refracted at the surface of the GaAs . R t n = 3.3 1.7 1 Figure Cla . 333.
Page 42
... loss ( such as diffuser reflectance's being less than 1 ) , we may say that the total energy collected by the receiver will be as small as 10-12 J or less . Next , we estimate the energy transmitted from the LED through the lens . If ...
... loss ( such as diffuser reflectance's being less than 1 ) , we may say that the total energy collected by the receiver will be as small as 10-12 J or less . Next , we estimate the energy transmitted from the LED through the lens . If ...
Page 5
... loss performance of joined sections of dissimilar fiber de- pend upon this parameter . " Radiation angle " is a measure of the cone angle transmitted by the fiber [ 7 ] . This measurement is usually made in the far field of a short , 2 ...
... loss performance of joined sections of dissimilar fiber de- pend upon this parameter . " Radiation angle " is a measure of the cone angle transmitted by the fiber [ 7 ] . This measurement is usually made in the far field of a short , 2 ...
Page 6
... loss modes which do not propagate far in the fiber . In general , this can be accomplished by one of two approaches . The beam optics approach avoids the initial excitation of certain high loss modes by restricting the launch spot size ...
... loss modes which do not propagate far in the fiber . In general , this can be accomplished by one of two approaches . The beam optics approach avoids the initial excitation of certain high loss modes by restricting the launch spot size ...
Page 7
... loss of resolution near the core cladding boundary due to the decrease in local numerical aperture [ 17 ] . Some of these problems may be alle- viated in a recently described " modified near - field " technique [ 18 ] . Despite some ...
... loss of resolution near the core cladding boundary due to the decrease in local numerical aperture [ 17 ] . Some of these problems may be alle- viated in a recently described " modified near - field " technique [ 18 ] . Despite some ...
Other editions - View all
Common terms and phrases
antenna attenuation Backscatter response backscatter signal backscatter signature beam beam divergence Bureau of Standards C3Hg calculated calibration capture fractions components coupling loss dBV/m densimeter DEPARTMENT OF COMMERCE detector diameter diode dipole electric field electronic engineering equation experimental far-field fault signature Federal field distortion due field intensity field strength Figure frequency function graded-index fiber Haynes Hiza IEEE Trans index fibers input instrument isotropic Laboratory laser laser diode leaky modes lens logarithmic Magnetic field distortion measurement metering unit methane microbending MIXTURE mode filter mole fraction N₂ National Bureau near-field numerical aperture optical fiber OTDR output parameters peak percent perfectly conducting cylinder potentiometer pulse radiation angle radiation monitor range Rayleigh scattering Report Resistor scan Science sensor step-index fiber switch Table Tech technical Technology temperature transverse electromagnetic cell U.S. DEPARTMENT voltage waveguide wavelength ZERO
Popular passages
Page 99 - NONPERIODICALS Monographs — Major contributions to the technical literature on various subjects related to the Bureau's scientific and technical activities. Handbooks — Recommended codes of engineering and industrial practice (including safety codes) developed in cooperation with interested industries, professional organizations, and regulatory bodies.
Page 99 - DC 20056. Building Science Series — Disseminates technical information developed at the Bureau on building materials, components, systems, and whole structures. The series presents research results, test...
Page 45 - A special series of interim or final reports on work performed by NBS for outside sponsors (both government and non-government). In general, initial distribution is handled by the sponsor; public distribution is by the National Technical Information Services (Springfield, Va.
Page 48 - ... public safety. The Bureau's technical work is performed by the National Measurement Laboratory, the National Engineering Laboratory, and the Institute for Computer Sciences and Technology. THE...
Page 45 - Mathematics Series — Mathematical tables, manuals, and studies of special interest to physicists, engineers, chemists, biologists, mathematicians, computer programmers, and others engaged in scientific and technical work. National Standard Reference Data Series — Provides quantitative data on the physical and chemical properties of materials, compiled from the world's literature and critically evaluated.