Physics Lab Equipment

 

LEOI-22 Precision Interferometer1.jpg

1. Main stage

2. Side stage

3. Light source

4. Beam expander

5. Transparent slice clamp

6. Ground glass screen

7. Rotational pointer and SOCKET 3

8. Fixed mirror (also as a F-P mirror)

9. Presetting micrometer

10. Fine micrometer

11. Movable mirror

12. Stage for mounting items 6 or 8

13. Compensator

14. Beam splitter

15. Extension arm

16. Two-in-one screen

17. SOCKET 2 for mounting item 4


LEOI-22 Precision Interferometer2.jpg


Fringe image acquired by color camera



LEOI-22 Precision Interferometer

LEOI-22 Precision Interferometer

Features 

  • Three Modes

  • Stable Base for Precise Measurement

  • Compact and Lightweight

  • Complete Solution

  • 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, the high resolution Fabry-Perot interferometer, and the useful Twyman-Green interferometer in one unit. 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. Twyman-Green interferometer is used to measure the defects in optical components such as lenses, prisms, and windows etc.

 

Measurements are precise in three classical modes of operation. Switching between the three modes of operation and aligning components are very simple, as this complete set of high quality components is carefully mounted on a heavy, stable base. Using an optional color camera, interference fringes can be acquired to a VGA display or a projector for real-time lecture demonstration.

 

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. Measurement of the refractive index of a transparent slice

9. Multi-beam interference observation

10. Measurement of the He-Ne laser wavelength

11. Interference fringe observation of the Sodium D-lines

12. Demonstrating the principle of a Twyman-Green interferometer

13. Interference fringe acquisition by color camera for VGA display or projector (optional)


Specifications

DescriptionSpecifications
Flatness of Beam Splitter and Compensator0.1 λ
Coarse Travel of Mirror10 mm
Fine Travel of Mirror0.625 mm
Fine Travel Resolution0.25 μm
Fabry-Perot Mirrors30 mm (dia), R=95%
Wavelength Measurement AccuracyRelative error: 2% for 100 fringes
Sodium-Tungsten LampSodium lamp: 20 W; Tungsten lamp: 30 W adjustable
He-Ne LaserPower: 0.7~ 1 mW; Wavelength: 632.8 nm
Air Chamber with GaugeChamber 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

DescriptionQty
Interferometer Main Frame1
Ground Glass Screen1
Holder for Beam Expander1
Extension Arm1
Two-in-One Observation Screen1
Transparent Slice Samples2
Transparent Slice Clamp1
Sodium-Tungsten Lamp with Power Supply1 set
He-Ne Laser1 set
Air Chamber with Gauge1 set
Manual Counter1
CMOS VGA Camera with Mount & Keypad (Optional)1 set


 

LEOI-22 Precision Interferometer1.jpg

1. Main stage

2. Side stage

3. Light source

4. Beam expander

5. Transparent slice clamp

6. Ground glass screen

7. Rotational pointer and SOCKET 3

8. Fixed mirror (also as a F-P mirror)

9. Presetting micrometer

10. Fine micrometer

11. Movable mirror

12. Stage for mounting items 6 or 8

13. Compensator

14. Beam splitter

15. Extension arm

16. Two-in-one screen

17. SOCKET 2 for mounting item 4


LEOI-22 Precision Interferometer2.jpg


Fringe image acquired by color camera



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