Fiber optic probe
Spectrophotometric techniques based on emission, absorption or scattering processes are frequently used for qualitative and quantitative analyses. Fiber optic sensing devices for detecting the existence and extent of chemicals or changes in chemical or physical parameters are well known. Development of lasers and optical fibers has allowed placement of sensitive equipment in locations remote from industrial process environments, making spectrophotometry applicable to a wide range of processes. Fiber optic detection systems using spectrometric absorption analysis techniques typically include a light source, a sample cell containing the fluid of interest, an indicator and a detector, such as a spectrophotometer. Light is passed through the sample cell and received by the spectrophotometer, which measures the absorption spectrum of the received light. Fiber optic probes have long been used to measure the properties of solutions. Such probes use optical fibers to send out light to interact with the solution. The light is then picked up by the optical fibers. This received light includes information about the characteristics of the solution. Fiber-optic probes make it possible to collect optical information such as Raman spectra without having to place the material being characterized inside a spectrometer housing. Fiber optic probes can be used in various applications including manufacturing processes, medical applications, remote measurements in harsh environments, monitoring ground water flow, etc. Such probes simplify the interfacing of spectroscopic systems to chemical processes, and allow analytical instruments to be located remotely from hostile environments in need of spectroscopic monitoring.
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