JPS5987019U

JPS5987019U - Screen projection viewing window

Info

Publication number: JPS5987019U
Application number: JP18254982U
Authority: JP
Inventors: 隆則柴田
Original assignee: キノ精密工業株式会社
Priority date: 1982-12-03
Filing date: 1982-12-03
Publication date: 1984-06-12

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図は、不透明材に埋め込んだ正のレンズ系、により
物体の像を不透明材に対し反対側のスクリーン上に投影
する状態を示す図である。第２図は、当該レンメ系とス
クリーンとの間にミラーを置いて正立の像を得る本考案
実施例であり、第３図は、第２図のミラーの代わりにプ
リズムを用いた変更実施例である。第４図及び第５図は
、レンズ系とスクリーンとの間に２回の反射を介在させ
て左右正置で正立の実像を得る実施例を示し、第６図乃
至第９図は、複数のプリズム又は複数のミラーからなる
上下左右反転光学系をレンズ系とスクリーンとの間に配
設して垂直なスクリーン上に左右正置で正立の像を得る
実施例を示す。１０・・・レンズ系、１２・・・不透明材、１４・・・
物体、１６・・・スクリーン、１８・・・像、２ｐ・・
・観察者、２２・・・ミラー、２４・・・プリズム、２
６・・・ミラー、２８・・・プリズム、３０，３２．３
４，３６．３８・・・プリズム、４０，４２，４４．４
８・・・ミラー。FIG. 1 is a diagram showing a state in which a positive lens system embedded in an opaque material projects an image of an object onto a screen on the opposite side to the opaque material. Figure 2 shows an embodiment of the present invention in which a mirror is placed between the Lemme system and the screen to obtain an erect image, and Figure 3 shows a modified implementation using a prism instead of the mirror in Figure 2. This is an example. 4 and 5 show an example in which two reflections are interposed between the lens system and the screen to obtain an erect real image with right and left orientation, and FIGS. An embodiment will be described in which a vertically and horizontally inverted optical system consisting of a prism or a plurality of mirrors is disposed between a lens system and a screen to obtain an erect image on a vertical screen. 10... Lens system, 12... Opaque material, 14...
Object, 16...Screen, 18...Image, 2p...
・Observer, 22... Mirror, 24... Prism, 2
6... Mirror, 28... Prism, 30, 32.3
4, 36.38... Prism, 40, 42, 44.4
8...Mirror.

Claims

[Claims for Utility Model Registration] (1) A lens system with a positive composite focal length, a wide angle, and a long back focus is embedded in an opaque material that does not transmit light rays, and an image formed by the lens system and the lens system is projected. A slerine projection type viewing window, characterized in that a reflection optical system is provided between the screen and the screen for at least erecting the image. (2) The scope of the utility model registration claim, characterized in that the lens system is a retrofocus lens system consisting of at least two groups: a front group with negative refractive power and a rear group with strong refractive power. The screen projection type viewing window described in (1). (3) Utility model registration claim paragraph (1) or (2) characterized in that the reflective optical system consists of a single reflective surface.
) A screen projection viewing window as described in section 2.). (4) Claims (1) or (2) of the utility model registration claim, wherein the reflective optical system is comprised of a plurality of reflective surfaces that invert both the vertical and horizontal directions of the light rays from the lens system. Screen projection viewing window as described. (5) The screen projection type observation window according to claims (1) to (4) of the utility model registration, characterized in that the exit pupil of the lens system is located at a far distance.