A reticle, also known as a graticule, scales, patterns, used in eyepiece of a sighting device, such as telescope, microscope, or oscilloscope, etc. They are engraved lines in the eyepieces, with chrome coating. The engraved signes including: cross, dots, lines, circles, scales, or a combination of these. 
PHYO can make the engraveing both for chemical eitching or physical marking. With or without coating on the substrates. Both for positive or negative markings.
Specially we can reach blue color Chrome Coating on substrate get a clear image of eyepieces.

INFO:   info(at)phyoptics.com