Fluence
Energy delivered per unit area, normally published in joules per square centimetre.
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Reading note
Fluence describes how much energy reaches a given area of the surface, not how much power the device draws. Two devices quoting the same fluence can still differ in pulse duration and spot size, and those differences change how the energy is distributed in tissue.
Because fluence is an area quantity, it cannot be compared between devices without also knowing the spot size the figure was measured at.
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Related entries
- Pulse durationThe length of a single emission, published in milliseconds, microseconds, or nanoseconds.
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