A shutter for continuous square wave modulation of a pencil of light
| Autor: | R G Berry, O C Jones |
|---|---|
| Rok vydání: | 1964 |
| Předmět: | |
| Zdroj: | Journal of Scientific Instruments. 41:92-94 |
| ISSN: | 0950-7671 |
| DOI: | 10.1088/0950-7671/41/2/307 |
| Popis: | An electro-mechanical shutter has been developed for possible use in a new photometric technique. The shutter is of the open-shut type and is used to produce a square wave modulation of a pencil of light with a repetition frequency of 33 c/s. `Rise times' as short as 40 μsec have been achieved. The ratio of light to dark intervals can be continuously varied while the shutter is in operation, over a range corresponding to average transmissions of between 95% and 5%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|