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LEOI-22 Precision Interferometer
Category: Optical Experiment System  Publish Time: 2014-07-04 17:01 

LEOI-22 Precision Interferometer
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 Part NO. :  DCFBG-series
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LEOI-22 Precision Interferometer 

Description
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.

Feathure
Three Modes
 Stable Base for Precise Measurement
 Complete Solution

Application
a. Two-beam Interference observation
b. Equal-inclination fringe observation
c. Equal-thickness fringe observation
d. White-light fringe observation
e. Wavelength measurement of the Sodium D-lines
f. Wavelength separation measurement of the Sodium D-lines
g. Measurement of the refractive index of air
h. Multi-beam interference observation
i. Measurement of the He-Ne laser wavelength
j. Interference fringe observation of the Sodium D-lines
l. Demonstrating the principle of a Twyman-Green interferometer
Specification

Flatness of Beam Splitter and Compensator

0.05 λ

Coarse Travel of Mirror

10 mm

Fine Travel of Mirror

0.625 mm

Fine Travel Resolution

0.25 μm

Fabry-Perot Mirrors

30 mm (dia), R=95%

Wavelength Measurement Accuracy

Relative error: 2% for 100 fringes

Part list

Description

Qty

Interferometer Main Frame

1

Ground Glass Screen

1

Holder for Beam Expander

1

Extension Arm

1

Two-in-One Observation Screen

1

Transparent Slice Samples

2

Transparent Slice Clamp

1

Instruction Manual

1

Sodium-Tungsten Lamp (optional)

Sodium lamp: 20 W; Tungsten lamp: 30 W adjustable

He-Ne Laser (optional)  

0.7-1 mW @632.8 nm, includes laser tube holder

Air Chamber with Gauge  (optional)

Chamber length: 80 mm; Pressure range: 0-40 kPa

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