Design of a high precision dilatometer using laser interferometry
This study examines the design of a high precision dilatometer which utilizes laser interferometry as the basis for the length measurement system. The dilatometer is being designed for operation from ambient to 800/sup 0/C using samples which require minimal preparation. Several interferometric techniques useful to dilatometry were reviewed from the literature. As a result of this review and establishment of performance criteria, a technical design is proposed. The optical design incorporates a two-frequency He--Ne laser with ac detection in a modified Michelson interferometer. A vertical sample/furnace configuration appears to offer a number of design advantages. Operational considerations and dilatometer development costs are also presented.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- DOE Contract Number:
- EX-76-C-04-0789
- OSTI ID:
- 6424043
- Report Number(s):
- SAND-78-1796; TRN: 79-005662
- Country of Publication:
- United States
- Language:
- English
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