JPH0412667U - - Google Patents

Description

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

第１図ａは本考案の一実施例による小型長焦点
の反射型光結合装置の平面図、第１図ｂは第１図
ａのＢ−Ｂ′線断面図、第２図は同実施例による
１次成形体のカツト部分を説明するための断面図
、第３図は同実施例による小型長焦点の反射型光
結合装置の光路を説明するための断面図、第４図
は同実施例による小型長焦点の反射型光結合装置
の製造時に使用するフレーム例の平面図、第５図
ａは従来例による小型長焦点の反射型光結合装置
の平面図、第５図ｂは第５図ａのＡ−Ａ′線断面
図、第６図ａは従来の小型長焦点の反射型光結合
装置と検出物間の距離を示す図、第６図ｂは従来
の小型長焦点の反射型光結合装置の検出出力の距
離特性を示す図である。 １１……リードフレーム、１２……発光素子、
３……受光素子、１５……透光性樹脂、１６……
１次成形体（発光側）、１７……１次成形体（受
光側）、１８……遮光性外装樹脂。 FIG. 1a is a plan view of a small-sized, long-focus reflective optical coupling device according to an embodiment of the present invention, FIG. 1b is a cross-sectional view taken along line B-B' of FIG. 1a, and FIG. FIG. 3 is a cross-sectional view for explaining the optical path of a small, long-focus reflective optical coupling device according to the same embodiment, and FIG. 4 is a cross-sectional view for explaining the cut portion of the primary molded body according to the same embodiment. FIG. 5a is a plan view of an example of a frame used in the manufacture of a small-sized, long-focus reflective optical coupler according to the prior art, and FIG. 5b is a plan view of a conventional small-sized, long-focus reflective optical coupler. Fig. 6a is a diagram showing the distance between a conventional small-sized, long-focus reflective optical coupler and a detection object, and Fig. 6b is a conventional small-sized, long-focal-length reflective optical coupler. FIG. 3 is a diagram showing the distance characteristics of the detection output of the coupling device. 11...Lead frame, 12...Light emitting element,
3... Light receiving element, 15... Transparent resin, 16...
Primary molded body (light-emitting side), 17... Primary molded body (light-receiving side), 18... Light-shielding exterior resin.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] リードフレームに搭載された発光素子、受光素
子を各々独立した透光性樹脂で１次成形し、該両
１次成形体の上面それぞれを、前記両素子の対向
方向外側に縦断面を設けた凸レンズに形成し、前
記両１次成形体の上面を除く部分を遮光性外装樹
脂で２次成形して、前記発光及び受光の１次成形
体を一体に並置してなることを特徴とする反射型
光結合装置。 A light-emitting element and a light-receiving element mounted on a lead frame are each formed by primary molding with an independent light-transmitting resin, and each of the upper surfaces of the primary molded bodies is a convex lens having a longitudinal cross section on the outside in the direction in which the elements face each other. A reflective type characterized in that the light-emitting and light-receiving primary moldings are integrally arranged side by side, with the parts excluding the upper surfaces of both the primary moldings being secondary molded with a light-shielding exterior resin. Optical coupling device.