An auto-focus system for reproducible focusing in laser ablation inductively coupled plasma mass spectrometry
A method of controlling the focus position of the ablating laser was evaluated. This system consists of a displacement measuring unit based on the triangulation displacement measurement principle. A simple preliminary experimental setup with a light source (LED, light emitting diode) and a displacem...
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| Published in: | Spectrochimica acta. Part B: Atomic spectroscopy Vol. 50; no. 1; pp. 63 - 66 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
1995
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| Online Access: | Get full text |
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| Summary: | A method of controlling the focus position of the ablating laser was evaluated. This system consists of a displacement measuring unit based on the triangulation displacement measurement principle. A simple preliminary experimental setup with a light source (LED, light emitting diode) and a displacement-sensor (PSD, position sensing detector) with optics and a electronic circuit, resulted in a reproducibility of a given lateral position of ±5
μm. A fine-tuning of the components, as well as the use of a laser diode as a light source will certainly improve this value. |
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| ISSN: | 0584-8547 1873-3565 |
| DOI: | 10.1016/0584-8547(94)00094-C |