Where \ Delta \ theta is the beam divergence and the " overall intracavity angular dispersion " is the quantity in parentheses ( elevated to 1 ).
12.
Gaussian laser beams are said to be diffraction limited when their radial beam divergence \ theta = \ Theta / 2 is close to the minimum possible value, which is given by
13.
The light emitted is required to be in the infrared range, meet eye safety standards, and have pulse repetition less than one kHz with beam divergence less than 5 milliradian.
14.
Beam divergence is often used to characterize electromagnetic beams in the optical regime, for cases in which the aperture from which the beam emerges is very large with respect to the wavelength.
15.
Where \ Delta \ theta is the beam divergence and " M " is the beam magnification provided by the beam expander that multiplies the angular dispersion provided by the diffraction grating.
16.
This is known as the " cavity linewidth equation " where \ Delta \ theta is the beam divergence and the term in parenthesis ( elevated to 1 ) is the overall intracavity dispersion.
17.
The use of nanoparticles in laser dye-doped poly ( methyl methacrylate ) ( PMMA ) laser gain media was demonstrated in 2003 and it has been shown to improve conversion efficiencies and to decrease laser beam divergence.
18.
A beam may, for example, have an elliptical cross section, in which case the orientation of the beam divergence must be specified, for example with respect to the major or minor axis of the elliptical cross section.
19.
If any optical power is present, and a simple magnifying device is used to examine the fiber end, then the user is no longer protected by beam divergence, since the entire beam may be imaged onto the eye.
20.
Performing the same, unoptimised SANS simulation with full beam monitors in jnads ( i . e . not just calculating the on-sample flux ) takes about 45 seconds on the same hardware and gives you an idea of the beam divergence and homogeneity at the same time.
