Optica 2WAJ Manual De Instrucciones página 7

5.0 FUNCTION AND CONSTRUCTION OF THE REFRACTOMETER
1. Incident prism
2. Refracting prism
3. Swingable mirror
4. Dispersion compensation prism group
5. Telescopic objective
6. Screen
Between the incident prism (1) and the refracting prism (2) there exists a minute and homo-
geneous space in which the tested liquid is placed.
When a light beam (daylight or incandescent) enters the incident prism (1) and passes throu-
gh the refracting prism (2), a light beam of which the refracting angles are greater than the
critical angle is produced. The beam will enter via the swingable mirror (3) and travel through
the dispersion free prism group (4).
Fig.3
7. Eyepiece
8. Paralleling prism
9. Reading objective
10. Reflecting mirror
11. Scale plate
12. Condenser
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