| 发明名称 |
PROCESS AND APPARATUS FOR MEASURING DISTANCE BY LASER INTERFEROMETRY WITH TWO WAVELENGTHS |
| 摘要 |
The apparatus and method include adjusting two single frequency lasers to separate longitudinal modes of an interferometer, the plates of which are separated by a distance to be measured. A rough estimate of the distance is made using a tape measure or the like. The rough estimate, together with the frequency distance ( DELTA F) of the lasers adjusted to the longitudinal modes of the interferometer is used to solve the equation: <IMAGE> where c is the speed of light and L1 is the rough estimate. The parameter k then calculated by rounding k1 to the nearest integer and the accurate distance L is calculated according to the equation: <IMAGE> |
| 申请公布号 |
DE3064960(D1) |
申请公布日期 |
1983.10.27 |
| 申请号 |
DE19803064960 |
申请日期 |
1980.10.16 |
| 申请人 |
ANVAR AGENCE NATIONALE DE VALORISATION DE LA RECHERCHE |
发明人 |
BOURDET, GILBERT LOUIS JACQUES;FRANCO, MICHEL ALAIN FERNAND |
| 分类号 |
G01B9/02;G01B11/14;(IPC1-7):G01B9/02 |
主分类号 |
G01B9/02 |
| 代理机构 |
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