CN203631036U - Polarized-light experimental instrument - Google Patents

Abstract

The utility model relates to the field of experimental instruments, in particular to a polarized light experimental instrument. A polarized light experiment instrument, including an optical guide rail (1), at least 6 movable blocks (2) are arranged on the optical guide rail (1), and a laser generator (3), a polarizer and a polarizer are respectively arranged on the movable block (2) (4), 1/4 wave plate (5), optical platform (6), analyzer (7), signal receiver (8), laser generator (3) and signal receiver (8) connected to optical Signal Analyzer (9). The utility model has the following advantages: 1. Using the optical signal automatic detection system, the anti-interference ability is strong; 2. Five and a half digital display, no need to change gears for full range display, the data is continuous and linear, and the reading is stable; 3. The automatic background is adopted Noise deduction technology; 4. The light source adopts pulse power supply.

Description

Polarized Light Experimenter

technical field

The utility model relates to the field of experimental instruments, in particular to a polarized light experimental instrument.

Background technique

The polarized light experiment is a university popularization experiment to verify Marius' law and observe the polarization characteristics of light. The existing polarized light instrument reads data through photoelectric conversion. The background light has a great influence on the experimental data, and the reading is unstable. Data are non-linear. This has a great impact on the experimental results.

Contents of the invention

The utility model provides a polarized light experimental instrument aiming at the disadvantages in the prior art that the background light has a great influence on the experimental data, the reading is unstable, and the data of the polarized light are all non-linear.

In order to solve the above technical problems, the utility model is solved through the following technical solutions:

Polarized light experiment instrument, including the optical guide rail, on which there are at least 6 movable blocks, and the movable blocks are respectively equipped with a laser generator, a polarizer, a 1/4 wave plate, an optical platform, and a polarizer , the signal receiver, the laser generator and the signal receiver are connected to the optical signal analyzer.

Preferably, the optical signal analyzer includes a silicon photocell, and the silicon photocell is sequentially connected to an I/V conversion circuit, a filter circuit, a 16-bit A/D converter and a microprocessor, a digital filter and a 5.5-digit display, and the other end of the microprocessor The light intensity modulation circuit is connected, and the light intensity modulation circuit is connected with the silicon photovoltaic cell. The light intensity modulation circuit can eliminate the influence of background light on the experimental data, and the five-and-a-half digit display does not need to shift gears to display the full range, and the data is continuous, stable, and linear.

Preferably, a groove is provided on the lower part of the movable block, and the groove is snapped into the optical guide rail, and an elastic button is provided on one side of the movable block. The groove and the movable block facilitate horizontal movement on the optical guide rail, and the elastic button is used to position the movable block.

Preferably, a rotating shaft is arranged on the upper part of the movable block. The rotation axis facilitates the rotation of polarizers and 1/4 wave plates.

Preferably, both the polarizer and the analyzer are polarizers.

Preferably, a wafer or an optical rotation tube is placed on the optical bench. Optical rotation tubes are used for optical rotation experiments.

Due to the adoption of the above technical scheme, the utility model has remarkable technical effects: 1. The optical signal automatic detection system is used, and the anti-interference ability is strong; 2. The five-and-a-half digit display does not need to change gears for full-range display, and the data is continuous and linear. Stable readings; 3. Adopt automatic background noise subtraction technology; 4. The light source adopts pulse power supply.

Description of drawings

Fig. 1 is the outline structure diagram of the utility model;

Figure 2 is a schematic diagram of the circuit composition of the optical signal analyzer.

The names of the parts indicated by the numbers in the above drawings are as follows: 1—optical guide rail, 2—movable block, 3—laser generator, 4—polarizer, 5—1/4 wave plate, 6—optical Tool platform, 7—polarizer, 8—signal receiver, 9—optical signal analyzer, 10—groove, 11—slack button, 12—rotating shaft.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

Example 1

The polarized light experiment instrument, as shown in Figure 1, includes an optical guide rail 1, at least 6 movable blocks 2 are arranged on the optical guide rail 1, and a laser generator 3, a polarizer 4, and 1 are respectively arranged on the movable block 2 in turn. /4 The wave plate 5, the optical platform 6, the polarizer 7, the signal receiver 8, the laser generator 3 and the signal receiver 8 are connected to the optical signal analyzer 9.

The lower part of the movable block 2 is provided with a groove 10, and the groove 10 is snapped into the optical tool guide rail 1, and an elastic button 11 is provided on one side of the movable block 2. A 360° rotating shaft 12 is provided on the top of the movable block 2 . Both the polarizer 4 and the analyzer 7 are polarizers.

A laser generator 3 and a signal receiver 8 are respectively installed at both ends of the optical tool guide rail 1, so that the laser beam enters the 6 mm aperture hole of the signal receiver probe at the same height.

Add a polarizer near the laser generator 3 as a polarizer 4, and clear the access power of the optical signal analyzer 9; turn off the laser generator 3, and adjust the zero adjustment knob of the optical signal analyzer 9 to make the reading of the signal analyzer 9 zero ; Turn on the laser generator 3, rotate the polarizer, observe the reading on the optical signal analyzer 9, and stop at a larger reading that is less than 1; add another polarizer near the signal receiver 8 probe, as the analyzer 7 , rotate the polarizer 7, and stop when the reading of the optical signal analyzer 9 happens to be zero; record the measured angle and power meter readings on the polarizer 7; rotate the polarizer 7 in the same direction, and record the optical signal every 15 degrees Analyzer 9 readout.

Turn the polarizer 7 to make the system enter the extinction state where the reading of the optical signal analyzer 9 is zero, and insert a 1/4 wave plate 5 between the polarizer 4 and the polarizer 7 . At this point the system will likely have light passing through it. Turn the 1/4 wave plate 5 to make the system re-enter the extinction state. At this time, the optical axis of the quarter-wave plate 5 is parallel to the polarization direction of the polarizer 4 .

Rotate the 1/4 wave plate 515 degrees, record the readings of the optical signal analyzer 9 and the angle of the polarizer 7, then rotate the polarizer 7360 degrees, and record the extreme value readings of the optical signal analyzer 9 and the corresponding measured angle of the polarizer 7 . Rotate the 1/4 wave plate at intervals of 15 degrees in the same direction, and repeat the previous step.

The optical signal analyzer 9 includes a silicon photocell, which is sequentially connected to an I/V conversion circuit, a filter circuit, a 16-bit A/D converter, a microprocessor, a digital filter and a 5.5-digit display. The other end of the microprocessor is connected with a light intensity modulation circuit, and the light intensity modulation circuit is connected with a silicon photocell. The silicon photovoltaic cell senses the light signal, converts it into a current signal, and converts the current signal into I/V, amplifies, filters, and samples it by a 16-bit A/D converter, and then transmits the obtained data to the microprocessor, which performs One part of the processing is for light intensity modulation, and the other part is for digital filtering. It is displayed on a 5.5-digit digital display through digital filtering, and the signal modulated by light intensity returns to the silicon photocell.

The utility model has remarkable effects. 1. Using the optical signal automatic detection system, the anti-interference ability is strong; 2. Five and a half digital display, full range display without shifting gears, the data is continuous and linear, and the reading is stable; 3. The automatic background noise is adopted. Deduction technology; 4. The light source adopts pulse power supply.

In a word, the above descriptions are only preferred embodiments of the present utility model, and all equal changes and modifications made according to the patent scope of the utility model should fall within the scope of the utility model patent.

Claims (6)

1. polarization experimental apparatus, comprise light tool guide rail (1), it is characterized in that: light tool guide rail (1) is provided with at least 6 movable blocks (2), corresponding laser generator (3), the polarizer (4), quarter wave plate (5), light tool platform (6), analyzer (7), the signal receiver (8) of being provided with successively on movable block (2), laser generator (3) is connected optical signal analyzer (9) with signal receiver (8).

2. polarization experimental apparatus according to claim 1, it is characterized in that: optical signal analyzer (9) comprises silicon photocell, silicon photocell connects I/V translation circuit, filtering circuit, 16 A/D converters and microprocessor, digital filter and 5 half digital displays successively, the microprocessor other end connects intensity modulation circuit, and intensity modulation circuit connects silicon photocell.

3. polarization experimental apparatus according to claim 1, is characterized in that: movable block (2) bottom is provided with groove (10), and groove (10) snaps in light tool guide rail (1), and movable block (2) one sides are provided with elastic button (11).

4. polarization experimental apparatus according to claim 3, is characterized in that: movable block (2) top is provided with rotation axis (12).

5. polarization experimental apparatus according to claim 1, is characterized in that: the polarizer (4) is all polaroid with analyzer (7).

6. polarization experimental apparatus according to claim 1, is characterized in that: upper wafer or the polarization tube placed of light tool platform (6).

Images