From: owner-ammf-digest@smoe.org (alt.music.moxy-fruvous digest) To: ammf-digest@smoe.org Subject: alt.music.moxy-fruvous digest V14 #12701 Reply-To: ammf@fruvous.com Sender: owner-ammf-digest@smoe.org Errors-To: owner-ammf-digest@smoe.org Precedence: bulk alt.music.moxy-fruvous digest Monday, November 27 2023 Volume 14 : Number 12701 Today's Subjects: ----------------- The universe only calls once [GIFT] ["Miriam" ] ---------------------------------------------------------------------- Date: Mon, 27 Nov 2023 15:34:08 +0100 From: "Miriam" Subject: The universe only calls once [GIFT] The universe only calls once [GIFT] http://growthmatrix.live/IT1d8kapbk7-tVHA0gE1HOy8T7Qarrz4HOFHQ__ZjxUpIJvunA http://growthmatrix.live/8jJ3eRbK9RoUPzi6Jvw_RXA_sKKoBfYMTdE9zBBnfhbvViCDIg When lasers were first invented, the speckle effect was considered to be a severe drawback in using lasers to illuminate objects, particularly in holographic imaging because of the grainy image produced. Researchers later realized that speckle patterns could carry information about the object's surface deformations, and exploited this effect in holographic interferometry and electronic speckle pattern interferometry. Speckle imaging and eye testing using speckle also use the speckle effect. Speckle is the chief limitation of coherent lidar and coherent imaging in optical heterodyne detection. In the case of near field speckles, the statistical properties depend on the light scattering distribution of a given sample. This allows the use of near field speckle analysis to detect the scattering distribution; this is the so-called near-field scattering technique. When the speckle pattern changes in time, due to changes in the illuminated surface, the phenomenon is known as dynamic speckle, and it can be used to measure activity, by means of, for example, an optical flow sensor (optical computer mouse). In biological materials, the phenomenon is known as biospeckle. In a static environment, changes in speckle can also be used as a sensitive probe of the light source. This can be used in a wavemeter configuration, with a resolution around 1 attometre, (equivalent to 1 part in 1012 of the wavelength, equivalent to measuring the length of a football field at the resolution of a single atom) and can also stabilise the wavelength of lasers or measure polarization. The disordered pattern produced by speckle has been u ------------------------------ End of alt.music.moxy-fruvous digest V14 #12701 ***********************************************