A gridwork or lattice of lines set into the eyepiece of optical instruments to help with measurements or observation
A reticle or crosshair is a shape superimposed on an image that is used for precise alignment of a device. Crosshairs are most commonly a "+" shape, though many variations exist, including dots, posts, circles, and chevrons. Most commonly associated with telescopic sights for aiming firearms, crosshairs are also common in optical instruments used for astronomy and surveying, and are also popular in graphical user interfaces as a precision pointer. The crosshair was invented by Robert Hooke, and dates to the 17th century
A very tiny grid pattern inserted in an eyepiece lens It is used to make actual measurements of the size of objects seen through the microscope Learn more here
A very tiny grid pattern inserted in an eyepiece lens It is used to make actual measurements of the size of objects seen through the microscope
Sometimes called a mask or a photomask Glass plate with chrome on one side in which a pattern is etched The pattern is transferred to the wafer by shining light through the reticle
A photo plate on which an enlarged copy of a semiconductor circuit layer pattern is reproduced and used in the production of photo masks