Graticule (Noun)
Meaning
A network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument.
Classification
Nouns denoting man-made objects.
Examples
- The theodolite's eyepiece was equipped with a graticule to help surveyors take precise measurements of angles.
- To sight the target, the marksman peered through the rifle scope's graticule, aligning the cross hairs with the object's center.
- Astronomers use the graticule in the telescope eyepiece to measure the exact positions of celestial objects.
- The high-powered microscope featured a built-in graticule to aid researchers in counting cell populations.
- Engineers designing the telescope accounted for the graticule's distortion when calculating the instrument's final focus.