1. He-Ne laser
2. Side stage
3. Beam expander
4. Fixed mirror
5. Beam splitter
6. Compensator
7. F-P fixed mirror
8. F-P movable mirror
9. Coarse micrometer
10. Movable mirror
11. Fine micrometer
12. Movable stage
13. Glass screen
E/E': Eye observation
Fringe image acquired by color camera
Features
Two Interferometer Modes
Rigid and Precise
He-Ne Laser, Sodium-Tungsten Lamp, and Air Chamber Included
Optional VGA Video Camera for Fringe Image Display and Projection
Introduction
This equipment combines the historically important Michelson interferometer and the high resolution Fabry-Perot interferometer in one rigid and compact structure. Michelson interferometer is still an important instrument in today's physics laboratories and is used for observing two-beam interference phenomena. Fabry-Perot interferometer is for observing multiple-beam interference and measuring the fine structure of spectrum. Measurements are precise in two modes of operation. Switching between the two modes of operation and aligning components are relatively simple. This instrument is suitable for physics teaching at universities and colleges. Using an optional color camera, interference fringes can be displayed on a VGA monitor or sent to a projector for real-time lecture demonstration.
The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
Using this instrument, the following experiment examples can be conducted:
1. Two-beam Interference observation
2. Equal-inclination fringe observation
3. Equal-thickness fringe observation
4. White-light fringe observation
5. Wavelength measurement of the Sodium D-lines
6. Wavelength separation measurement of the Sodium D-lines
7. Measurement of the refractive index of air
8. Multi-beam interference observation
9. Measurement of the He-Ne laser wavelength
10. Interference fringe observation of the Sodium D-lines
11. Interference fringe acquisition by color camera for VGA display or projector (optional)
Specifications
| Description | Specifications |
| Flatness of Beam Splitter and Compensator | 0.1 λ |
| Coarse Travel of Mirror | 10 mm |
| Fine Travel of Mirror | 0.25 mm |
| Fine Travel Resolution | 0.5 μm |
| Fabry-Perot Mirrors | 30 mm (dia), R=95% |
| Wavelength Measurement Accuracy | Relative error: 2% for 100 fringes |
| Dimension | 500×350×245 mm |
| Sodium-Tungsten Lamp | Sodium lamp: 20 W; Tungsten lamp: 30 W adjustable |
| He-Ne Laser | Power: >2.0 mW; Wavelength: 632.8 nm |
| Air Chamber, Pump with Gauge | Chamber length: 80 mm; Pressure range: 0-40 kPa |
Camera with VGA Port (Optional) | Sensor size: 1/4" |
| Resolution: 1280 × 1024 | |
| Pixel size: 2.8 μm × 2.8 μm | |
| Bit: 8 | |
| Output format: VGA | |
| Length measurement on screen with crosshairs | |
| Function setting & operation: via keypad and menu |
Part List
| Description | Qty |
| Interferometer Main Frame | 1 |
| Ground Glass Screen | 1 |
| Alignment Aperture | 1 |
| Sodium-Tungsten Lamp with Power Supply | 1 set |
| He-Ne Laser with Power Supply | 1 set |
| Air Chamber with Gauge | 1 set |
| Manual Counter | 1 |
| CMOS VGA Camera with Mount & Keypad (Optional) | 1 set |
1. He-Ne laser
2. Side stage
3. Beam expander
4. Fixed mirror
5. Beam splitter
6. Compensator
7. F-P fixed mirror
8. F-P movable mirror
9. Coarse micrometer
10. Movable mirror
11. Fine micrometer
12. Movable stage
13. Glass screen
E/E': Eye observation
Fringe image acquired by color camera
