PRECISE DEPTH MEASUREMENT IN NUCLEAR EMULSIONS (in French)
Depth measurements in nuclear emulsions are generally made with with a micrometric screw the precision of which is not sufficient. A simple device is described which allows successive focusing on grains at different levels in the plate without moving the objective. The principle of the device consists in changing the optical path by moving the ocular along the optical axis. The device can be used routinely on all microscopes. Measurements of depth within an emulsion are possible to a precision of 0.1 mu m over a path of 20 mu . The gain in precision with the device was evaluated on measurements of the inclination of tracks in Ilford G-5. K-5. and L-4 emulsions. The device is particularly useful with fine-grain emulsions. It is shown to be especially useful in cases where measurements are to be made on a short portion of a track or where the inclination is slight. A simple mechanism for transferring the readings is used. (T.R.H.)
- Research Organization:
- Instituto Nazionale di Fisica Nucleare, Milan
- NSA Number:
- NSA-15-002838
- OSTI ID:
- 4129598
- Journal Information:
- Nuovo Cimento (Italy) Divided into Nuovo Cimento A and Nuovo Cimento B, Vol. Vol: (10) 16, Suppl. No. 2; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- French
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