Found 2 items, similar to field lens.
English → English
Definition: field lens
n : the lens that is farthest from the eye in an optical device
with morethan one lens
English → English
Definition: Field lens
(f[=e]ld), n. [OE. feld, fild, AS. feld; akin to
D. veld, G. feld, Sw. f["a]lt, Dan. felt, Icel. fold field of
grass, AS. folde earth, land, ground, OS. folda.]
1. Cleared land; land suitable for tillage or pasture;
cultivated ground; the open country.
2. A piece of land of considerable size; esp., a piece
inclosed for tillage or pasture.
Fields which promise corn and wine. --Byron.
3. A place where a battle is fought; also, the battle itself.
In this glorious and well-foughten field. --Shak.
What though the field be lost? --Milton.
4. An open space; an extent; an expanse. Esp.:
(a) Any blank space or ground on which figures are drawn
(b) The space covered by an optical instrument at one
Without covering, save yon field of stars.
Ask of yonder argent fields above. --Pope.
5. (Her.) The whole surface of an escutcheon; also, so much
of it is shown unconcealed by the different bearings upon
it. See Illust. of Fess
, where the field is represented
as gules (red), while the fess is argent (silver).
6. An unresticted or favorable opportunity for action,
operation, or achievement; province; room.
Afforded a clear field for moral experiments.
7. A collective term for all the competitors in any outdoor
contest or trial, or for all except the favorites in the
8. (Baseball) That part of the grounds reserved for the
players which is outside of the diamond; -- called also
Note: Field is often used adjectively in the sense of
belonging to, or used in, the fields; especially with
reference to the operations and equipments of an army
during a campaign away from permanent camps and
fortifications. In most cases such use of the word is
sufficiently clear; as, field battery; field
fortification; field gun; field hospital, etc. A field
geologist, naturalist, etc., is one who makes
investigations or collections out of doors. A survey
uses a field book for recording field notes, i.e.,
measurment, observations, etc., made in field work
(outdoor operations). A farmer or planter employs field
hands, and may use a field roller or a field derrick.
Field sports are hunting, fishing, athletic games, etc.
(Geol.) See under Coal
, light ordnance mounted on wheels, for the
use of a marching army.
(Bot.), a plant of the Mint family (Calamintha Acinos
); -- called also basil thyme
(Mil.), small flags for marking out the
positions for squadrons and battalions; camp colors.
(Zo["o]l.), a large European cricket
), remarkable for its loud notes.
(a) A day in the fields.
(b) (Mil.) A day when troops are taken into the field for
instruction in evolutions. --Farrow.
(c) A day of unusual exertion or display; a gala day.
, in New England, an officer charged with the
driving of stray cattle to the pound.
(Zo["o]l.), the little bustard (Otis tetrax
found in Southern Europe.
(a) A binocular telescope of compact form; a lorgnette; a
(b) A small achromatic telescope, from 20 to 24 inches
long, and having 3 to 6 draws.
(c) See Field lens
(a) The skylark.
(b) The tree pipit.
(Optics), that one of the two lenses forming the
eyepiece of an astronomical telescope or compound
microscope which is nearer the object glass; -- called
also field glass
(Bot.), a plant (Sherardia arvensis
) used in
(Mil.), the highest military rank conferred
in the British and other European armies.
(Mil.), an officer above the rank of captain
and below that of general.
Field officer's court
(U.S.Army), a court-martial
consisting of one field officer empowered to try all
cases, in time of war, subject to jurisdiction of garrison
and regimental courts. --Farrow.
(Zo["o]l.), the black-bellied plover
); also sometimes applied to the
Bartramian sandpiper (Bartramia longicauda
(Zo["o]l.), a small spaniel used in hunting
(a) A small American sparrow (Spizella pusilla
(b) The hedge sparrow. [Eng.]
(Mil.), a staff formerly used by gunners to
hold a lighted match for discharging a gun.
(Zo["o]l.), the European meadow mouse.
Field of ice
, a large body of floating ice; a pack.
, or Field of view
, in a telescope or microscope,
the entire space within which objects are seen.
. see under Magnet
. See Magnetic
To back the field
, or To bet on the field
. See under
, v. t. -- To keep the field
(a) (Mil.) To continue a campaign.
(b) To maintain one's ground against all comers.
To lay against the field
or To back against the field
bet on (a horse, etc.) against all comers.
To take the field
(Mil.), to enter upon a campaign.