Fast position‐sensitive shadowmeter
| Autor: | L. A. Jones, C. W. Wood, Allie M. Laird, John D. Seagrave |
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| Rok vydání: | 1983 |
| Předmět: | |
| Zdroj: | Review of Scientific Instruments. 54:165-170 |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/1.1137364 |
| Popis: | A simple optical detector of position versus time providing submillimeter spatial and nanosecond time resolution is described. The spatial beam profile of a nanosecond‐pulse‐width nitrogen laser is sampled simultaneously when the UV light strikes multiple turns of a spiral fiber‐optic delay line. Fluorescent light coupled into the fiber converts the profile samples into serial bursts of light. These bursts are detected by avalanche photodiodes; electrical pulses are recorded on fast oscilloscopes. An interposed absorbing or refracting material casts a ‘‘shadow’’ which is measured by comparison with a reference recording. Applications are suggested, and two long‐time‐base recording methods are described. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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