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Browsing by Subject "Gas lenses"

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Gas lensing in a heated spinning pipe

Author: Mafusire, C ; Forbes, A ; Snedden, Glen C ; Mahlase, Andrew CK ; Michaelis, MM ; Mathuthu, M Date: Jul 2006 When a heated pipe is rotated, the dynamics of the gas inside exhibit properties reminiscent of a solid-state positive lens. The properties are a result of a parabolic distribution of refractive index in the pipe which is caused by mixing of ... Read more
Non-solid non-rigid optics for high-power laser systems

Author: Michaelis, MM ; Forbes, A ; Conti, A ; Nativel, N ; Bencherif, H ; Bingham, R ; Kellett, B ; Govender, K Date: 14 Jun 2006 Non-solid and non-rigid optics employ gas and liquid transmission and reflection, as well as flexible membranes to influence laser beams, laser driven particle beams and harmonic generators. Some examples are acoustic gratings, phase conjugate ... Read more
Optical aberrations in a gas lenses

Author: Mafusire, C ; Forbes, A ; Michaelis, MM ; Snedden, Glen C Date: Aug 2010 Gas lenses work on the basis that aerodynamic media can be used to generate a graded refractive index distribution which can be used to focus a laser beam. Examples of these are the spinning pipe gas lens (SPGL) and the flame lens (FL). The ... Read more
Spinning pipe gas lens aberrations along the axis and in the boundary layer

Author: Mafusire, C ; Forbes, A Date: Nov 2013 When the walls of an open-ended horizontal steel pipe are heated before the pipe is rotated along its axis, the exchange of the expelled heated air with the incoming cooler air, sucked in along the axis, results in a medium capable of focusing ... Read more
Wave aberrations in a spinning pipe gas lens

Author: Mafusire, C ; Forbes, A ; Michaelis, MM ; Snedden, Glen C Date: Jun 2009 The graded index (GRIN-like) medium generated by a gas inside a heated pipe when it is rotated about its longitudinal axis has the ability to focus a laser beam. However, recent research has shown that the medium generated has a deleterious ... Read more

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Browsing by Subject "Gas lenses"

Browsing by Subject "Gas lenses"

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