Application of a focused laser beam in a grating interferometer for high-resolution displacement measurements

ABSTRACTA Fluorocarbon resin surface was selectively modified by irradiation with a ArF laser beam through a thin layer of NaAlO2, B(OH)3, or H2O solution to give a hydrophilic property. As a result, with low fluence, the surface was most effectively modified with the NaAlO2 solution among the three solutions. However, the contact angle in this case changed by 10 degrees as the fluence changed only 1mJ/cm2. When modifying a large area of the surface, high resolution displacement could not be achieved because the laser beam was not uniform in displacing functional groups. Thus, the laser fluence was successfully made uniform by homogenizing the laser beam; the functional groups were replaced on the fluorocarbon resin surface with high resolution, which was successfully modified to be hydrophilic by distributing the laser fluence uniformly.

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The Heights of Solar Radio Sources at 1424 MHz and 696 MHz

Publications of the Astronomical Society of Australia ◽

10.1017/s1323358000011401 ◽

1969 ◽

Vol 1 (5) ◽

pp. 192-194 ◽

Cited By ~ 4

Author(s):

D. G. Cole ◽

R. F. Mullaly

Keyword(s):

Solar Activity ◽

High Resolution ◽

Solar Disk ◽

Previous Investigation ◽

Solar Radio ◽

Radio Sources ◽

Grating Interferometer ◽

Maximum Solar Activity

The heights of solar radio sources at 1424 MHz and 696 MHz have been measured during the years 1965 and 1966. Solar activity at this time was near minimum. The number of radio sources appearing on the solar disk rarely exceeded three at any time and it thus was possible to resolve the majority of these with a high resolution grating interferometer. Many of the previous height measurements at these frequencies have been made near times of maximum solar activity and the confusion of sources within the beam has limited their accuracy. The number of sources studied here is quite considerably higher than in any previous investigation at these frequencies, and the period of observation has been continuous.

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High resolution imaging for inspection of laser beam melting systems

2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) ◽

10.1109/i2mtc.2013.6555507 ◽

2013 ◽

Cited By ~ 24

Author(s):

Joschka zur Jacobsmuhlen ◽

Stefan Kleszczynski ◽

Dorian Schneider ◽

Gerd Witt

Keyword(s):

High Resolution ◽

Laser Beam ◽

High Resolution Imaging ◽

Laser Beam Melting ◽

Resolution Imaging

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The Radio Brightness Distribution on the Sun at 21 cm from Combined Eclipse and Pencil?Beam Observations

Australian Journal of Physics ◽

10.1071/ph610403 ◽

1961 ◽

Vol 14 (3) ◽

pp. 403 ◽

Cited By ~ 9

Author(s):

T Krishnan ◽

NR Labrum

Keyword(s):

High Resolution ◽

High Sensitivity ◽

Brightness Distribution ◽

Pencil Beam ◽

The Sun ◽

Radio Brightness ◽

Radio Brightness Distribution ◽

Grating Interferometer

A study of the brightness distribution on the Sun at 21-cm wavelength on April 8, 1959, is described. High resolution observations were made of the partial eclipse on that day with a simple radiometer of high sensitivity. The brightness distribution of the uneclipsed Sun at the same wavelength was obtained using a cross-grating interferometer, which enabled the bright regions to be located accurately.

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