The company plans to build a new research and development center of laser pointer

The company plans to build a new research and development center of laser pointer .
Laser emitted laser beam is reflected back mirror R, the light hits the sample. In order to get stronger excitation light, using a condenser C1 to the laser focus, so that the sample container in the central part of the formation of the laser beam waist. To enhance the effect, the other side of the container put a concave mirror M2. Concave mirror M2 can sample the scattered light in the side return, and finally by the condenser C2 to the scattered light converged on the monochromator entrance slit. Well outside the optical path is adjusted to obtain Raman spectra of the key, the first optical path and should be made outside of the monochromator optical coaxial. Under normal circumstances, they have adjusted and are mounted on a steel bench. Tunable laser radiation in the sample is mainly on the waist, the waist should just be imaged on the monochromator slit. Imaging is in the best position, scanning the monochromator through an article to determine the strength of the Raman spectra. The customer and the manager of laser pointer company took a photo together after finishing the technology confirmation meeting of laser pointer .
Although the frequency of the Raman spectra change with the light frequency, but the frequency of the Raman and Rayleigh light scattering is not the difference between the frequency change with the light frequency, but with the sample rotational levels of the molecular vibration. Raman spectra of the intensity of the incident light intensity and the concentration of sample molecules is proportional to: where φk-beam in the vertical direction of the incident light collected by the focusing mirror Raman scattered light flux (W); φ0-incident radiation flux on the sample (W); Sk-Raman scattering coefficient, equivalent to about 10-28 ~ 10-29mol/sr; N-number of molecules per unit volume; H-effective sample size; L-consider the refractive index and samples of other factors within the field-effect coefficient; Raman beam focusing lens in the direction of the half angle. Raman effect and Raman scattering light and the relationship between the sample molecules can be of material and concentration of the molecular structure analysis and research. The cell phone can not be used during the sleeping time because laser pointer is on.
Incident sample molecules are irradiated, the optical field to the molecular charge distribution in the cyclical changes, producing an alternating molecular dipole moment. Dipole moment change over time secondary radiation of electromagnetic waves that form a light scattering phenomenon. Within the molecular dipole moment per unit volume and is called the vector polarization of molecules, with P said. Polarization is proportional to the incident electric field is known as molecular polarizability.