Scattering light detection method is penetrated in scattering optical detection device and drawing

摘要

PROBLEM TO BE SOLVED: To provide a Raman scattered light detector, etc., with which it is possible to relax the accuracy of optical axis adjustment of an optical interference filter.SOLUTION: The Raman scattered light detector detects Raman scattered light released from gaseous molecules using an optical interference filter 51. A transmitted wavelength sweep unit, for example, rotates the optical interference filter and successively changes the transmission center wavelength of the optical interference filter while Raman scattered light is released from gaseous molecules, and a control unit detects Raman scattered light passing through the optical interference filter and calculates the wavelength of Raman scattered light. Normally, by rotating the optical interference filter that is used while stationary by being fixed, it is possible to heighten reliability by a simple optical interference system control method and reduce the device size and weight, and further to realize a low-cost detector.SELECTED DRAWING: Figure 2