WebThe term depth of focus is sometimes also used in the context of laser beams.It is essentially the same meaning, but for a quantitative measure it is then more appropriate … WebThe Rayleigh–Plesset equation is often applied to the study of cavitation bubbles, shown here forming behind a propeller. In fluid mechanics, the Rayleigh–Plesset equation or …

瑞利距离 - 维基百科，自由的百科全书

Webthe simulated gain G=G0 versus Rayleigh length (normal-ized by the undulator length: z0 ¼ Z0=L) as the FEL peak gain is increased. Clearly the simple theory holds only when the peak gain is less than a few percent. For a cold cavity (no gain), a characteristic feature of short Rayleigh length resonators is their extreme sensitiv- floor for screened in porch

Laser Beam Measurement Vocabulary - ophiropt.com

Webwhich determines the length over which the beam can propagate without diverging significantly. (The older literature often deals with the confocal length b, which is just … WebNov 18, 2015 · z R (Rayleigh) is typically relatively small, unless it’s a highly collimated beam. That means that s” will dominate the denominator of the second term. Unless, s-f is very small. In other words, here is when you need the Gaussian formula: A highly collimated beam; Any beam that has a distance to lens (s) very similar to the lens focal length. WebIt is also double the Rayleigh distance. The Rayleigh length is defined as the distance for which the beam radius is smaller or equal to √2 times the radius at the waist. So, when a focal length is small compared to the incident beam size, the depth of field tends to be small and vice-versa. Finally, M² corresponds to the quality factor. floor for patio