Fibre-optics faceplate observable with high-intensity ambient illumination专利检索-图像对比度图形技术专利检索查询-专利查询网

Fibre-optics faceplate observable with high-intensity ambient illumination

阅读：64发布：2022-01-03

专利汇可以提供Fibre-optics faceplate observable with high-intensity ambient illumination专利检索，专利查询，专利分析的服务。并且A fibre-optics faceplate for displaying an optical image of high image contrast that is suitable for visual observation under high-intensity ambient illumination. The faceplate is a bundle of side-by-side optical fibres, each having a core with a low numerical aperture of below about 0.4, cladding therearound having an index of refraction less than that of the core, and a light-absorbent glass layer around the cladding. The outer surface of the bundle is roughened and has a coating thereon with an index of refraction less than that of the cores. The inner surface has a fluorescent material thereon for emitting optical signals by application thereto of electrical signals.，下面是Fibre-optics faceplate observable with high-intensity ambient illumination专利的具体信息内容。

权利要求

1. AN INDEX OF REFRACTION FOR SAID CLADDINGS THAT IS LOWER THAN SAID SELECTED INDEX OF REFRACTION, WHEREBY SAID SCATTERED AMBINET LIGHT IN SAID CORES IS PARTIALLY REFLECTED OUTWARDLY, AND

1. A NUMERICAL APERTURE OF UP TO ABOUT 0.4 FOR SAID BUNDLE THAT DEFINES A RELATIVELY NARROWED VIEWING ANGLE, INCREASES INTERNAL REFLECTIONS BY SAID CLADDINGS, AND IMPROVES IMAGE CONTRAST,

1. A FIBRE OPTICS FACEPLATE HAVING A NEARLY BLACK SURFACE, FOR DISPLAYING AN OPTICAL IMAGE OF HIGH CONTRAST UNDER HIGH-INTENSITY AMBIENT ILLUMINATION CONDITIONS, COMPRISING: A. A SCREEN FORMED OF A BUNDLE OF SIDE-BY-SIDE OPTICAL FIBRES, COMPRISING CORES HAVING A SELECTED INDEX OF REFRACTION, CLADDINGS ENVELOPING EACH OF SAID CORES, AND ABSORBING GLASS LAYERS DISPOSED BETWEEN SAID CLAD CORES, SAID BUNDLE HAVING AN OUTER SURFACE AND AN INNER SURFACE AT THE OPPOSED ENDS OF SAID FIBRES: B. AS A LIGHT-SCATTERING MEANS FOR AMBIENT LIGHT PASSING THROUGH SAID CORES FROM SAID OUTER SURFACE, A FLUORESCENT LAYER AS A COATING ON SAID INNER SURFACE: C. A MININIZING MEANS FOR AMBIENT LIGHT THAT IS INCIDENT UPON SAID DARK SURFACE, COMPRISING:

2. A COARSE FINISHING OF SAID OUTER SURFACE THAT SCATTERS RANDOMLY SAD INCIDENT AMBIENT LIGHT, AND

2. The faceplate according to claim 1, wherein said coating comprises a grease.

2. light absorption capability in said absorbing glass layers for absorbing said outwardly reflected ambient light passing through said claddings.

2. a coarse finishing of said outer surface that scatters randomly said incident ambient light, and

2. LIGHT ABSORPTION CAPABILITY IN SAID ABSORBING GLASS LAYERS FOR ABSORBING SAID OUTWARDLY REFLECTED AMBIENT LIGHT PASSING THROUGH SAID CLADDINGS.

3. a transparent coating which covers said coarse finished outer surface, said coating having a refractive index lower than said refractive index of said cores and having a range of transparency selected in consideration of the relationship between the wavelength characteristic of the light emitted from said fluorescent layer and the spectral sensitivity of an observer''s eyes, whereby interference of said ambient light with said image is minimized and said narrowed viewing angle is widened; and D. a light absorption means for said randomly scattered ambient light entering said cores through said transparent coating and for said ambient light scattered back into said cores by said fluorescent layer, comprising:

3. The faceplate according to claim 1, wherein said coating comprises a plastic.

3. A TRANSPARENT COATING WHICH COVERS SAID COARSE FINISHED OUTER SURFACE, SAID COATING HAVING A REFRACTIVE INDEX LOWER THAN SAID REFRACTIVE INDEX OF SAID CORES AND HAVING A RANGE OF TRANSPARENCY SELECTED IN CONSIDERATION OF THE RELATIONSHIP BETWEEN THE WAVELENGTH CHARACTERSITIC OF THE LIGHT EMITTED FRM SAID FLOUORESCENT LAYER AND THE SPECTRAL SENSITIVITY OF AN OBSERVER''S EYES, WHEREBY INTERFERENCE OF SAID AMBIENT LIGHT WITH SAID IMAGE IS MINIMIZED AND SAID NARROWED VIEWING ANGLE IS WIDENED: AND D. A LIGHT ABSORPTION MEANS FOR SAID RANDOMLY SCATTERED AMBIENT LIGHT ENTERING SAID CORES THROUGH SAID TRANSPARENT COATING AND FOR SAID AMBIENT LIGHT SCATTERED BACK INTO SAID CORES BY SAID FLUORESCENT LAYER, COMPRISING:

说明书全文

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Fibre-optics faceplate observable with high-intensity ambient illumination

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