Overhead projector
专利汇可以提供Overhead projector专利检索，专利查询，专利分析的服务。并且PURPOSE: To project images of constant illumination always over the entire screen of specified dimensions, regardless of the size of transparent positives, by using plural light source systems, and making movable the reflecting mirror for luminous flux upward direction and reflecting mirror for projection.
CONSTITUTION: Plural light source systems 9, 10 are disposed in a housing 1 radially around the optical axis of a condenser lens 11 so that the optical axes thereof may intersect at one point, and a reflecting mirror for luminous flux upward direction 12 is disposed rotatably by means of a knob 14. A projecting lens 5 is replaceably fitted to an arm member 4 which is elevatable along a columnar member 3, and a reflecting mirror for projection 6 is supported rotatably in the directions of arrows A and B. As a result, when projecting a transparent positive 15 of approximately the same dimensions as a stage glass 2, it is sufficient to rotate the reflecting mirror for luminous flux upward direction 12 in the direction of the light source system 9 having light source lens 9c with long focal length; when projecting a smaller transparent positive, on the other hand, the light source system 10 having light source lens 10c with shorter focal length is used, and the inclination of the reflecting mirror for projection should be adjusted, the projecting lens 5 replaced, and the arm member 4 lowered.
COPYRIGHT: (C)1980,JPO&Japio，下面是Overhead projector专利的具体信息内容。
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 电致变色元件、电致变色组件、摄像头模组及电子设备 | 2020-05-11 | 162 |
| 可变图像显示体、柱状透镜图像形成方法 | 2020-05-13 | 978 |
| 显示系统和显示方法 | 2020-05-08 | 399 |
| 照明装置 | 2020-05-13 | 240 |
| 一种驱动电源 | 2020-05-13 | 869 |
| 面扫探头系统和光谱仪 | 2020-05-08 | 842 |
| 一种护栏灯透镜及应用该透镜的护栏灯 | 2020-05-08 | 1013 |
| 光纤探头装置 | 2020-05-11 | 476 |
| 一种一维线扫描成像结构、显微镜及显微探头 | 2020-05-13 | 811 |
| 光学元件、照明模组、信号照明复用车灯模组、车灯、汽车 | 2020-05-14 | 538 |
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