Effect of Visibility of the Fringes on the Tilt Measurement Using a Cyclic Interferometer and Polarization Phase Shifting
15 Jun 2018-Vol. 10692
TL;DR: In this article, the effect of the misalignment of the quarter wave plate on the visibility of the fringes and consequently on the accurcy of the measurement was numerically investigated and a new scheme of polarizing phase shifting techique was developed which is rather simpler compared to those reported in the literature.
Abstract: Precise measurement of extremely small tilt angles is of immense importance in various scientific and technological applications. Interferometry has always been a tool of great importance in such applications. Most of the conventional interferometric techniques use a Michelson configuration and the problem with this interferometer is that it is extremely sensitive to environmental turbulances and vibrations. In our privious works, we had introduced a cyclic interferometer for the measurement of tilt angles which showed excellent stability against environmental turbulances and vibrations as well as twice the sensitivity. Also, with the introduction of multiple reflections, sensitivity as low as 5 micro radian had been achieved by us. To improve the sensitivity further, we had employed phase shifting techniques. The cyclic configuration being a same path interferometer, we used a polarizing phase shifting technique. For acieving this, we developed a new scheme of polarizing phase shifting techique which is rather simpler compared to those reported in the literature. With this we could precisely measure angles as low as 2 nano radians. However, in these measurements we found that the precise alignment of the quarter wave plate plays an important role in the visibility of the fringes which affects the accuracy of measurement. In this work, we numerically investigate the effect of the misalignment of the quarter wave plate on the visibility of the fringes and consequently on the accurcy of the measurement.
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01 Jan 2016
TL;DR: The optical shop testing is universally compatible with any devices to read and is available in the digital library an online access to it is set as public so you can get it instantly.
Abstract: Thank you for downloading optical shop testing. As you may know, people have search hundreds times for their chosen books like this optical shop testing, but end up in harmful downloads. Rather than enjoying a good book with a cup of tea in the afternoon, instead they are facing with some infectious bugs inside their laptop. optical shop testing is available in our digital library an online access to it is set as public so you can get it instantly. Our books collection hosts in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the optical shop testing is universally compatible with any devices to read.
184 citations
17 Jun 1996
TL;DR: A torsion balance has been built for the measurement of the Newtonian gravitational constant that takes advantage of the particular properties of a wide thin Torsion strip under heavy load as discussed by the authors.
Abstract: A torsion balance has been built for the measurement of the Newtonian gravitational constant that takes advantage of the particular properties of a wide thin torsion strip under heavy load. The test mass is in the form of an assembly of four 0.47 kg masses suspended from a Cu-Se torsion strip 1.25 mm wide and 30 micrometers thick and 80 mm long. The source mass is an assembly of four 10 kg masses that can be turned to different positions with respect to the test masses. Preliminary tests of the system show that the relatively large gravitational signal produces a gravitational signal that, in air at atmospheric pressure, should easily be measurable to 0.1%. As we expect from our previous experience with torsion strips, an excellent zero stability is observed. A measurement of G with an uncertainty of 1% will be made soon to test all the systems and it is hoped to reach an uncertainty of 0.1% within a reasonably short time.
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TL;DR: In this article, the vacuum stress between closely spaced conducting surfaces, due to the modification of the zero-point fluctuations of the electromagnetic field, has been conclusively demonstrated using an electromechanical system based on a torsion pendulum.
Abstract: The vacuum stress between closely spaced conducting surfaces, due to the modification of the zero-point fluctuations of the electromagnetic field, has been conclusively demonstrated. The measurement employed an electromechanical system based on a torsion pendulum. Agreement with theory at the level of 5% is obtained.
1,238 citations
TL;DR: In this paper, the vacuum stress between closely spaced conducting surfaces, due to the modification of the zero-point fluctuations of the electromagnetic field, has been conclusively demonstrated using an electromechanical system based on a torsion pendulum.
Abstract: The vacuum stress between closely spaced conducting surfaces, due to the modification of the zero-point fluctuations of the electromagnetic field, has been conclusively demonstrated. The measurement employed an electromechanical system based on a torsion pendulum. Agreement with theory at the level of 5% is obtained.
1,072 citations
29 Sep 1994
TL;DR: In this article, the authors provide a clear and comprehensive introduction to scanning tunnelling microscopy and related scanning probe techniques, including the design and instrumentation of practical STM and associated systems, as well as applications in condensed matter physics, chemistry, biology, and nanotechnology.
Abstract: The investigation and manipulation of matter on the atomic scale have been revolutionised by scanning tunnelling microscopy and related scanning probe techniques. This book is the first to provide a clear and comprehensive introduction to this subject. Beginning with the theoretical background of scanning tunnelling microscopy, the design and instrumentation of practical STM and associated systems are described in detail, as are the applications of these techniques in fields such as condensed matter physics, chemistry, biology, and nanotechnology. Containing 350 illustrations, and over 1200 references, this unique book represents an ideal introduction to the subject for final-year undergraduates in physics or materials science. It will also be invaluable to graduate students and researchers in any branch of science where scanning probe techniques are used.
1,027 citations
10 Apr 2012
229 citations
[...]
01 Jan 2016
TL;DR: The optical shop testing is universally compatible with any devices to read and is available in the digital library an online access to it is set as public so you can get it instantly.
Abstract: Thank you for downloading optical shop testing. As you may know, people have search hundreds times for their chosen books like this optical shop testing, but end up in harmful downloads. Rather than enjoying a good book with a cup of tea in the afternoon, instead they are facing with some infectious bugs inside their laptop. optical shop testing is available in our digital library an online access to it is set as public so you can get it instantly. Our books collection hosts in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the optical shop testing is universally compatible with any devices to read.
184 citations