Abstract
AbstractConventional portable and handheld Raman systems are based on a dispersive design. The drawback of this design is the tradeoff between laser spot size and resolution. Most conventional instruments have a very small laser spot size. This tightly focused beam produces high resolution but may miss the target material completely. Increasing the sampling area using a large beam requires a larger aperture and consequently, a corresponding loss of resolution, making accurate library matching difficult and prone to error.
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