NBS Technical NoteU.S. Government Printing Office, 1981 |
From inside the book
Results 1-5 of 51
Page 26
... patterns are the same when comparing with the Brooks and Donnelly data except for PVT , where there is a definite difference of about 0.3 percent between Maynard and Brooks and Donnelly . Performing the same estimation procedure as ...
... patterns are the same when comparing with the Brooks and Donnelly data except for PVT , where there is a definite difference of about 0.3 percent between Maynard and Brooks and Donnelly . Performing the same estimation procedure as ...
Page 18
... pattern of the LEDS . We have performed this scan by fixing the LEDs to a translation stage . The stage is connected ... patterns . Table 5 Dimensions of LEDs Spec ( μm ) Measured luminous diameter ( um ) C30116 / F # 1 450 1700 C30116 ...
... pattern of the LEDS . We have performed this scan by fixing the LEDs to a translation stage . The stage is connected ... patterns . Table 5 Dimensions of LEDs Spec ( μm ) Measured luminous diameter ( um ) C30116 / F # 1 450 1700 C30116 ...
Page 19
... pattern . We inspected the LEDs with a microscope and , through the micro- scope , with an infrared viewer . Although they are classified as surface emit- ters , they clearly emit a large fraction of their radiation through the edges of ...
... pattern . We inspected the LEDs with a microscope and , through the micro- scope , with an infrared viewer . Although they are classified as surface emit- ters , they clearly emit a large fraction of their radiation through the edges of ...
Page 20
... pattern called " speckle . " If the plane is located in the far field of the scatterer , then the speckle size is about 1.6 12 / D , where & is the range and D is the diameter of the scatterer [ 2 ] . The speckle area is also equal to ...
... pattern called " speckle . " If the plane is located in the far field of the scatterer , then the speckle size is about 1.6 12 / D , where & is the range and D is the diameter of the scatterer [ 2 ] . The speckle area is also equal to ...
Page 21
... the LEDs and scanned the detector across the aperture of the lens . This procedure does not measure the radiation pattern as a function of angle ; for that , we would have to restrict the detector to a circle centered about the LED . 21.
... the LEDs and scanned the detector across the aperture of the lens . This procedure does not measure the radiation pattern as a function of angle ; for that , we would have to restrict the detector to a circle centered about the LED . 21.
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.