The polarization state of light can be controlled by rotating the angle of the polarizer and waveplate. The polarizer turns natural light into polarized light, while the waveplate can change the polarization state of light.Polarized light experimental apparatusBy using a motor to drive the rotation of polarizers and waveplates, complex polarized light experimental results can be displayed to students through a computer interface.
Experimental content:
1. Verification of Marius' Law through Experimental and Theoretical Curves
2. Generate and verify light with various polarization states
3. The biased effect of Broust angle window panels
4. Analyze the function of the half wave plate based on experimental data
5. The role of quarter wave plate, elliptically polarized light, and circularly polarized light
Key steps:
Device connection and startup: Connect the laser, polarizer (such as 1/2 and 1/4 waveplates), and measuring instrument according to the optical path diagram. Open the upper computer software, click on the "Scan Device" recognition interface, and the green light on the status bar indicates a successful connection.
Parameter settings: Set the sampling frequency, operating wavelength, and power level (0 level is adaptive) in the software menu. Note that the diameter and power of the laser spot should be less than the maximum allowable value of the instrument.
Accurate alignment: Align the laser with the incident surface of the measuring instrument and use an alignment tool to ensure that the optical path is coaxial, which is the key to the success of the experiment.
Start measurement: Click on "Start Polarization Measuring Instrument", observe the polarization state changes on the software interface, and record the data curve.
Caution: When operating, be gentle and avoid touching optical components; Regularly clean the instrument and keep it dry; Turn off the power after use and store it properly. For a more intuitive demonstration, you can refer to relevant instructional videos.