WILD HEERBRUGG GONIOMETER EYEPIECE OCULAR 15x GK for MICROSCOPE w. 23mm

Description

WILD HEERBRUGG AG
Goniometer Eyepiece Ocular 15x GK
for all Microscopes with 23mm tube diameter
Goniometer Okular 15x
GK für alle Mikroskope mit 23mm Tubusöffnung
15x magnification /
15x Vergrösserung
G stands for Goniometer (for angle measurements) /
G steht für Gonio (Winkelmessung)
K stands for Compensating eyepieces  /
K steht für Kompens Okular
with two graticules / reticles for measuring angles and also length (see photos)
mit zwei Strichplatten zum Messen von Winkel und Längen (siehe Photos)
Out of a brochure:
The goniometer eyepiece (15x compensated eyepiece) is used for angular measurements.
Instead of a micrometer, the glas plate behind the collector lens carries a circle, divided into 360°.
The eyelens mount can be turned, whereas the one of the collector lens can be fixed at given rotation angles by means of a clamping screw on the tube. When turning the eyelens, a reticle cross in the field of view rotates over the fixed scale of angles. Reading is to one half of a degree, while fifths can still be estimated.
The diagonal scale is divied from 1 to 100 over the field of view.