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Experimental Instruments » LETI-1 Thermal Expansion Experiment Unit
Introduction
This instrument allows electric heated metal sample to drive plane mirror by means of its linear expansion. The resulting changes in optical path difference in a Michelson Interferometer induce variation in interference fringes. Through counting fringe variation, the linear thermal expansion coefficient is determined.
Key Features:
Compact structure, Various type of short sample, Low power consumption, High accuracy.
Specifications
| He-Ne Laser
| 1.0 mW, 632.8 nm |
| Type of Sample
| Copper, aluminum, and steel |
| Sample Length
| 150 mm |
| Heating Range
| 18°C ~ 60°C, with temperature-control |
| Temperature Measurement Accuracy
| 0.1°C |
| Display Value Error
| ±1% |
| Power Consumption
| 50 W |
| Error of Expansion Coefficient
| < 3% |
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