JPS5973728U

JPS5973728U - flashlight device

Info

Publication number: JPS5973728U
Application number: JP17019482U
Authority: JP
Inventors: 良治天明
Original assignee: キヤノン株式会社
Priority date: 1982-11-10
Filing date: 1982-11-10
Publication date: 1984-05-18
Also published as: JPH0121294Y2

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

[Brief explanation of the drawing]

第１図ａ１第１図ｂ１第１図Ｃ１第１図ｄはそれぞれ従
来例を示し、第１図ａは一面に縦フレネルレンズを形成
した光学パネルを示す図、第１図すは一面に横フレネル
レンズを形成した光学パネルを示す図、第１図Ｃは一面
に縦、横フレネルレンズを設けた光学パネルを示す図、
第１図ｄは一面に輪帯フレネルレンズを設けた光学パネ
ルを示す図、第２図ａ１第２図すは本考案の一実施例を
示し、第２図ａは光が最も拡散するように光学パネルを
移動した際の図、第２図すは光が最も集光するように光
学パネルを移動した際の図、第３図ａは第２図ａ１第２
図すに示す光学パネルの一面の詳細図、第３図すは第２
図ａ１第２図すに示す光学パネルの他面の詳細図、第４
図ａは一面に輪帯フレネルを形成した光学パネルの配光
特性図、第４図すは第２図ａ１第２図すに示す光学パネ
ルの配光特性図、第５図は本考案の他の例を示す光学パ
ネルの図、第６図は本考案の更に他の例を示す光学パネ
ルの図である。１・・・・・・閃光放電管、２・・・・・・反射傘、３
・・・・・・光学パネル、４・・・・・・光学パネル３
の輪帯フレネルレンズ、５・・・・・・光学パネル３の
縦フレネルレンズ、６・・・・・・シリンドリカル面、
７・・・・・・横フレネルレンズ、８・・・・・・縦フ
レネルレンズ。第４「勿酒４ワ（ｂ）Fig. 1 a1 Fig. 1 b1 Fig. 1 C1 Fig. 1 d shows conventional examples, Fig. 1 a shows an optical panel with a vertical Fresnel lens formed on one surface, and Fig. 1 shows an optical panel with a vertical Fresnel lens formed on one surface. A diagram showing an optical panel with a Fresnel lens formed thereon; FIG. 1C is a diagram showing an optical panel with vertical and horizontal Fresnel lenses provided on one side;
Figure 1 d shows an optical panel equipped with an annular Fresnel lens on one side, Figure 2 a shows an embodiment of the present invention, and Figure 2 a shows an optical panel equipped with an annular Fresnel lens on one side. Figure 2 is a diagram when the optical panel is moved. Figure 3 is a diagram when the optical panel is moved so that the light is most focused. Figure 3 a is Figure 2.
Detailed view of one side of the optical panel shown in Figure 3.
Figure a1 Detailed view of the other side of the optical panel shown in Figure 2, Figure 4
Figure a is a light distribution characteristic diagram of an optical panel with an annular Fresnel formed on one side, Figure 4 is a light distribution characteristic diagram of an optical panel shown in Figure 2 a1, Figure 2 is a figure 5, FIG. 6 is a diagram of an optical panel showing still another example of the present invention. 1...Flash discharge tube, 2...Reflector, 3
...Optical panel, 4...Optical panel 3
annular Fresnel lens, 5... vertical Fresnel lens of optical panel 3, 6... cylindrical surface,
7... Horizontal Fresnel lens, 8... Vertical Fresnel lens. No. 4 “Musake 4wa (b)”

Claims

[Scope of utility model registration request]

In a flash device that focuses light emitted from a flash discharge tube using a reflector and irradiates it onto a subject, an optical panel provided in front of the flash discharge tube is movable relative to the discharge tube, and the surface of the optical panel is What is claimed is: 1. An optical panel for a flash device, characterized in that the front and rear surfaces thereof are formed into lenses having different optical properties.