JPS59173051U - Reflective overhead projector - Google Patents

Reflective overhead projector

Info

Publication number
JPS59173051U
JPS59173051U JP6663283U JP6663283U JPS59173051U JP S59173051 U JPS59173051 U JP S59173051U JP 6663283 U JP6663283 U JP 6663283U JP 6663283 U JP6663283 U JP 6663283U JP S59173051 U JPS59173051 U JP S59173051U
Authority
JP
Japan
Prior art keywords
overhead projector
projection
light source
reflective
reflection mirror
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6663283U
Other languages
Japanese (ja)
Inventor
純一 矢澤
Original Assignee
株式会社リコー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社リコー filed Critical 株式会社リコー
Priority to JP6663283U priority Critical patent/JPS59173051U/en
Publication of JPS59173051U publication Critical patent/JPS59173051U/en
Pending legal-status Critical Current

Links

Landscapes

  • Overhead Projectors And Projection Screens (AREA)

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 drawings]

第１図は、この考案の一実施例を示す概略図、第２図は
、スクリーン上の投影画像に台形ひずみが発生する原因
を説明するための図、第３図は、この考案によるオーバ
ヘッドプロジェクタの作用を説明するための図、第４図
および第５図は、こ　　　・の考案における光源と投影
レンズとの連動機構のそれぞれ異なる例を示す斜視図で
ある。Fig. 1 is a schematic diagram showing an embodiment of this invention, Fig. 2 is a diagram for explaining the cause of trapezoidal distortion in a projected image on a screen, and Fig. 3 is an overhead projector according to this invention. 4 and 5 are perspective views showing different examples of interlocking mechanisms between the light source and the projection lens in this invention.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ステージ面となるフレネルレンズの上方に光源と投影レ
ンズおよび投影光をスクリーンに向けるための反射ミラ
ーとを備えた反射型オーバヘッドプロジェクタであって
、前記反射ミラーが、投影角度を変えられるように回動
可能であり、前記光源と投影レンズが、前記投影角度を
変えたときに前記スクリーン上に生じる台形ひずみを補
正できるように互に連動して移動可能である反射型オー
バヘッドプロジェクタ。A reflection type overhead projector that is equipped with a light source, a projection lens, and a reflection mirror for directing projection light toward a screen above a Fresnel lens serving as a stage surface, the reflection mirror being rotatable so as to change the projection angle. a reflective overhead projector, wherein the light source and the projection lens are movable in conjunction with each other to compensate for trapezoidal distortion that occurs on the screen when changing the projection angle.
JP6663283U 1983-05-02 1983-05-02 Reflective overhead projector Pending JPS59173051U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6663283U JPS59173051U (en) 1983-05-02 1983-05-02 Reflective overhead projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6663283U JPS59173051U (en) 1983-05-02 1983-05-02 Reflective overhead projector

Publications (1)

Publication Number Publication Date
JPS59173051U true JPS59173051U (en) 1984-11-19

Family

ID=30196838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6663283U Pending JPS59173051U (en) 1983-05-02 1983-05-02 Reflective overhead projector

Country Status (1)

Country Link
JP (1) JPS59173051U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419942U (en) * 1987-07-27 1989-01-31
JPH01214828A (en) * 1988-02-23 1989-08-29 Topcon Corp Automatically focused projecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419942U (en) * 1987-07-27 1989-01-31
JPH01214828A (en) * 1988-02-23 1989-08-29 Topcon Corp Automatically focused projecting device

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