JPS61198912U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例に係るトロイダルレン
ズの構成を示す斜視図、第２図は該レンズを光学
的走査装置内組付けた状態を示す正面断面図であ
る。 ３０；トロイダルレンズ、３１，３２；足部、
３１ａ，３２ａ；足部底面、３３；平面部、３０
Ａ；入射面、３０Ｂ；出射面。 FIG. 1 is a perspective view showing the structure of a toroidal lens according to an embodiment of the present invention, and FIG. 2 is a front sectional view showing the lens assembled into an optical scanning device. 30; toroidal lens, 31, 32; foot,
31a, 32a; Bottom surface of foot, 33; Plane portion, 30
A: Incidence surface, 30B: Output surface.

Claims (1)

【実用新案登録請求の範囲】 (1) ビーム走査方向に沿つて長手状に延設され
、すくなく共出射面側が走査方向に沿つて所定の
曲率半径で形成された、光走査装置に用いられる
各種レンズにおいて、前記出射面側のビーム走査
領域から外れた短手方向両側縁側に、ビームが走
査されるレンズ光軸面と平行に延設される一対の
足部を設け、該足部底面をレンズ光軸面と直交す
る平面状に形成した事を特徴とするレンズ。 (2) 前記レンズ入射面側の長手方向両端部を前
記足部底面と平行な平面状に形成した実用新案登
録請求の範囲第１項記載のレンズ。 (3) 前記レンズをプラスチツクで形成した実用
新案登録請求の範囲第１項又は第２項記載のレン
ズ。[Claims for Utility Model Registration] (1) Various types of optical scanning devices used in optical scanning devices, which extend longitudinally along the beam scanning direction, and have at least one common exit surface side formed with a predetermined radius of curvature along the scanning direction. In the lens, a pair of feet extending parallel to the optical axis plane of the lens where the beam is scanned is provided on both edges in the transverse direction away from the beam scanning area on the exit surface side, and the bottom surface of the feet is connected to the lens. A lens characterized by being formed into a planar shape perpendicular to the optical axis plane. (2) The lens according to claim 1, wherein both ends in the longitudinal direction on the entrance surface side of the lens are formed into a plane parallel to the bottom surface of the foot. (3) The lens according to claim 1 or 2, wherein the lens is made of plastic.