English-Thai Dictionary

lens

N เลนส์  len

 

lens

N เลนส์ ตา (อวัยวะ  crystalline lens len-ta

 

Webster's 1828 Dictionary

LENS

n.plu. lenses. [L. lens, a lentil. ] A transparent substance, usually glass, so formed that rays of light passing through it are made to change their direction, and to magnify or diminish objects at a certain distance. Lenses are double-convex, or convex on both sides; double-concave, or concave on both sides; plano-convex, or plano-concave, that is, with one side plane, and the other convex or concave; or convex on one side and concave on the other; the latter is called a meniscus.

 

Webster's 1913 Dictionary

LENS

Lens, n.; pl. Lenses (-êz ). Etym: [L. lens a lentil. So named from the resemblance in shape of a double convex lens to the seed of a lentil. Cf. Lentil. ] (Opt. )

 

Defn: A piece of glass, or other transparent substance, ground with two opposite regular surfaces, either both curved, or one curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually spherical, though rarely cylindrical, or of some other figure. Lenses

 

Note: Of spherical lenses, there are six varieties, as shown in section in the figures herewith given: viz. , a plano-concave; b double-concave; c plano-convex; d double-convex; converging concavo- convex, or converging meniscus; f diverging concavo-convex, or diverging meniscus. Crossed lens (Opt. ), a double-convex lens with one radius equal to six times the other. -- Crystalline lens. (Anat. ) See Eye. -- Fresnel lens (Opt. ), a compound lens formed by placing around a central convex lens rings of glass so curved as to have the same focus; used, especially in lighthouses, for concentrating light in a particular direction; -- so called from the inventor. -- Multiplying lens or glass (Opt. ), a lens one side of which is plane and the other convex, but made up of a number of plane faces inclined to one another, each of which presents a separate image of the object viewed through it, so that the object is, as it were, multiplied. -- Polyzonal lens. See Polyzonal.

 

New American Oxford Dictionary

lens

lens |lenz lɛnz | ▶noun a piece of glass or other transparent substance with curved sides for concentrating or dispersing light rays, used singly (as in a magnifying glass ) or with other lenses (as in a telescope ). • the light-gathering device of a camera, typically containing a group of compound lenses. • Physics an object or device that focuses or otherwise modifies the direction of movement of light, sound, electrons, etc. • Anatomy short for crystalline lens. • short for contact lens. DERIVATIVES lensed adjective, lens less adjective ORIGIN late 17th cent.: from Latin, ‘lentil ’ (because of the similarity in shape ).

 

lens hood

lens hood ▶noun a tube or ring attached to the front of a camera lens to prevent unwanted light from reaching the film.

 

lensman

lens man |ˈlenzmən, -ˌman ˈlɛnzmən | ▶noun ( pl. lensmen ) a professional photographer or cameraman.

 

Oxford Dictionary

lens

lens |lɛnz | ▶noun a piece of glass or other transparent material with curved sides for concentrating or dispersing light rays, used singly (as in a magnifying glass ) or with other lenses (as in a telescope ). • the light-gathering device of a camera, typically containing a group of compound lenses. • Anatomy short for crystalline lens. • short for contact lens. • Physics an object or device which focuses or otherwise modifies the direction of movement of light, sound, electrons, etc. DERIVATIVES lensed adjective, lensless adjective ORIGIN late 17th cent.: from Latin, ‘lentil ’ (because of the similarity in shape ).

 

lens hood

lens hood ▶noun a tube or ring attached to the front of a camera lens to prevent unwanted light from reaching the film.

 

lensman

lens |man |ˈlɛnzman | ▶noun ( pl. lensmen ) a professional photographer or cameraman.

 

Sanseido Wisdom Dictionary

lens

lens /lenz /〖語源は 「レンズ豆 (lentil )」〗名詞 複 ～es /-ɪz /C 1 (1枚の )レンズ ; (カメラ 望遠鏡などの )複合レンズ ▸ a convex [concave ] lens 凸 [凹 ]レンズ ▸ a fish-eye [long, telephoto ] lens 魚眼 [望遠 ]レンズ ▸ a lens cap カメラのレンズキャップ .2 〖通例単数形で 〗〘解剖 〙(眼の )水晶体 (crystalline lens ).3 ｟くだけて ｠コンタクトレンズ (contact lens ).4 〘物理 〙レンズ 〘音波 電子 電磁波などの流れをレンズのように曲げる装置 現象 〙.5 観点 , 見方 , 目 ▸ see through the lens of an adult 大人の目を通して見る l é ns less 形容詞 レンズのない .