Specific Process Knowledge/Back-end processing/Laser Micromachining Tool/fluence: Difference between revisions
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The theoretical spot sizes (<math>S</math>) can be found [[Specific Process Knowledge/Back-end processing/Laser Micromachining Tool/Spot size and optics|here]] | The theoretical spot sizes (<math>S</math>) can be found [[Specific Process Knowledge/Back-end processing/Laser Micromachining Tool/Spot size and optics|here]] | ||
Revision as of 14:56, 28 April 2014
Fluence
The fluence produces by a laser is, by definition, the energy delivered by a laser pulse (Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle E_{pulse}} ) per surface unit (Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle S} ) and it is given in J/cm2.
The function Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle E_{pulse}}
is defined as :
- Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle E_{pulse} = \frac{\overline{P}}{f}\,}
Where Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \overline{P}} (average power) and is measured with the laser sensor power measurement and the repetion rate (Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle f} ) is set in the settings.
The fluence is therefore determinate as such :
- Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle Fluence = \frac{E_{pulse}}{S}\,}
The theoretical spot sizes (Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle S} ) can be found here