Hartl's disk with laser

Specifications

This instrument has been designed for studying the different concepts of optics including reflection and refraction using the ray tracing technique.
It is composed of a rotatable white metal disk, of around 30 cm diameter.
The disk presents a graduation of 90°-0-90°-0-90° (divisions of 1°) that divides the disk in 4 equal quadrants with its centre clearly marked.
Shapes of various optical elements are also clearly marked on the disk to facilitate their placement while performing experiments.
The apparatus is supplied with a laser type light source that allows the projection of 1, 3 or 5 parallel beams for performing different experiments.
A complete set of optical elements is also included:
1| Acrylic prisms (refraction): semi-circular, biconvex, biconcave, right angled-prism, equilateral prism and trapezoidal prism.
2| Mirrors (reflection): plane and semi-circular.

All optical elements are provided with powerful magnets at their bottom for placing them securely on the disk either in horizontal or vertical disk position.
The bottoms of all refractive components are frosted to minimize internal reflections and revealing the path of light as it passes through.