Optical disk, with graduation, SE

P5620-1A
Price on request
To be used in geometrical optics,
can be placed directly on a table;
round disc made of white, sturdy plastics,
distinctly and visibly graduation of 360° in 1° - steps,
sectional lines in 90° steps,
marker points to place acrylic bodies or mirrors to the correct position;
disc-diameter (D)=200 mm