optical graticule

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• graticule — a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument. Used to measure the size of such objects as eggs of fishes. Also called reticle or reticule …   Dictionary of ichthyology

• graticule — grat·i·cule || grætɪkjuːl n. lines that represent parallels of longitude and latitude on maps and globes; network of lines placed in the focal plane of an eyepiece of an optical device (for visual guidance) …   English contemporary dictionary

• graticule — i. An array of lines used for aiming, measuring, or determining spatial relationship. Normally used in gun sights, HUDs (head up displays), maps, and charts. Graticules of a gyro gunsight. ii. In cartography, a network of lines representing the… …   Aviation dictionary

• graticule — n. 1 fine lines or fibres incorporated in a telescope or other optical instrument as a measuring scale or as an aid in locating objects. 2 Surveying a network of lines on paper representing meridians and parallels. Etymology: F f. med.L graticula …   Useful english dictionary

• reticle — graticule (a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument. Used to measure the size of such objects as eggs of fishes. Also called reticule) …   Dictionary of ichthyology

• reticule — graticule (a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument. Used to measure the size of such objects as eggs of fishes. Also called reticle) …   Dictionary of ichthyology

• Reticle — Crosshairs redirects here. For the fictional characters in Transformers, see Crosshairs (Transformers). A comparison of different reticles used in telescopic sights. The lower right represents a reticle found in the scope of a Russian SVD sniper… …   Wikipedia

• Eyepiece — For the device for looking through a camera, see viewfinder. A collection of different types of eyepieces. An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is… …   Wikipedia

• cross hair — noun either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration he had the target in his cross hairs • Syn: ↑cross wire • Hypernyms: ↑line • Part Holonyms:… …   Useful english dictionary

• Particle size distribution — The particle size distribution [Jillavenkatesa A, Dapkunas S J, Lin Sien Lum, Particle Size Characterization , NIST Special Publication 960 1, 2001] (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or… …   Wikipedia

• Figure of the Earth — An oblate spheroid Geodesy …   Wikipedia