JPS58168701U - fresnel lens - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来のフレネルレンズの平面図、第２図は同縦
断側面図、第３図は同フレネルレンズの成形状態の説明
図、第４図は同フレネルレンズの成形金型の説明図であ
や。第５図はこの考案のフタネルレンズの平面図、第６
図は同縦断側面図、第７図および第８図は同フレネルレ
ンズの成形金型の製法の説明図、第９図は同フレネルレ
ンズの成形状態の説明図である。 １・・・・・・フレネルレンズ、１ａ・・・・・・鋸歯
、Ｐ、ｆ’。 Ｐ′！・・・・・鋸歯のピッチ、ｄ・・・・・・鋸歯の
高さ、２・・・・・・マスタ、３・・・・・・マザー、
４・・・・・・スタンパ、５・・・・・・補強材、６・
・・・・・フレネル面側の成形金型、７・・・・・・平
面側の成形金型。 第６図 −ｉ　　　　−・ 、　　　第９゛図Figure 1 is a plan view of a conventional Fresnel lens, Figure 2 is a longitudinal sectional side view of the same, Figure 3 is an explanatory diagram of the molding state of the Fresnel lens, and Figure 4 is an explanatory diagram of the mold for the Fresnel lens. Aya. Figure 5 is a plan view of the futanel lens of this invention, Figure 6
7 and 8 are explanatory diagrams of the manufacturing method of the molding die for the Fresnel lens, and FIG. 9 is an explanatory diagram of the molding state of the Fresnel lens. 1...Fresnel lens, 1a...Sawtooth, P, f'. P'! ... Pitch of sawtooth, d ... Height of sawtooth, 2 ... Master, 3 ... Mother,
4...Stamper, 5...Reinforcement material, 6.
...Molding mold on the Fresnel surface side, 7...Molding mold on the flat side. Figure 6-i-・, Figure 9

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] フレネルレンズを構成する鋸歯状部の各鋸歯の高さが全
体的にほぼ一定になるように各鋸歯のピッチを可変させ
て鋸歯状部を形成したことを特徴とするフレネルレンズ
。1. A Fresnel lens characterized in that a sawtooth portion is formed by varying the pitch of each sawtooth so that the height of each sawtooth of the sawtooth portion constituting the Fresnel lens is substantially constant overall.