LPT-4 Experimental System for LC Electro-Optic Effect

Experiments

1. Verify the Marius law of optics;

2. Master the basic working principles of liquid crystal light switches;

3. Measure the electro-optic characteristic curve of the liquid crystal optical switch, and obtain the threshold voltage and turn off voltage of the liquid crystal from the electro-optic characteristic curve;

4. When the driving voltage changes periodically, the time response curve of the liquid crystal optical switch is measured, and the rising time and Fall time of the liquid crystal are obtained from the time response curve;

5. Measure the contrast of liquid crystal light switches under different viewing angles to understand the working conditions of liquid crystal light switches.

Specifications

Details

1. Semiconductor laser: wavelength 650nm, optical power output less than 1.5mw, working voltage 5V, laser beam three-dimensional adjustable, including dedicated semiconductor laser power supply, laser intensity output adjustable;

2. Square wave voltage (static experiment): 0~10V (effective value) continuously adjustable; Digital coding switch for frequency adjustment, frequency range 100.000~999.999Hz:

3. Square wave voltage (dynamic experiment): Vp. P=2-8V; Frequency 2Hz:

4. Optical power meter: 20WW, 200wW, 2mw and 20mw, three and a half digit Nixie tube display, digital key range switching, with power signal output interface, which can be connected to the data collector;

5. One polarizer and one polarizer, 025.4, with an angle resolution of 0.07 °;

6. LCD perspective testing turntable: minimum resolution 0.1 °;

7. Heavy optical guide rail: 75.0cm long, with a scale separation rate of 1mm; 5 slide blocks for optical tool holder:

8. Special optical power meter probe, anti stray light design, high stability;

9. Liquid crystal sample 1:25 × 27mm (without polarizing film);

10. Liquid crystal sample 2:25 × 27mm (with polarizing film);

11. An oscilloscope is required for the experiment(not included).