Stop-motion illuminator for centrifuges
| Autor: | Pavel E. Moroz |
|---|---|
| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Review of Scientific Instruments. 70:4433-4434 |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/1.1150089 |
| Popis: | The majority of laboratory centrifuges have no provisions for observation of the process of sedimentation and fractionation which goes on in the test tube in the darkness of a “black box.” Some centrifuges have a transparent cover or a magnifier in the cover to watch a blurred picture of the layers in the moving test tube which provides little information. The stop-motion effect with the test tube can a priori be based on either mechanical or electronic stroboscopy. To implement the mechanical stroboscopy, a standard microscope illuminator with a diaphragm is attached to the wall of the centrifuge. Through a hole in the wall the illuminator projects a cone of light with the diameter 0.1 mm at the top of the cone. The cone intersects with a 0.1 mm hole in the test-tube holder. The test tube is illuminated at the moment of intersection. Its content is observed through a magnifier on the cover of the centrifuge. The holder has a cut-out window to see the test tube. The flash at the hole–beam intersection is ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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