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    Task light
    46.
    发明授权
    Task light 失效
    任务灯

    公开(公告)号：US5530628A

    公开(公告)日：1996-06-25

    申请号：US43392

    申请日：1993-04-05

    申请人： Peter Y. Y. Ngai

    发明人： Peter Y. Y. Ngai

    IPC分类号： F21S8/00 ,  F21V5/02 ,  F21V7/00 ,  F21V11/02 ,  F21V13/04 ,  F21V13/12 ,  F21V13/00

    CPC分类号： F21V13/04 ,  F21V33/0012 ,  F21V5/02 ,  F21V7/005 ,  F21V11/02 ,  F21V13/12 ,  F21V3/049 ,  F21V7/0025 ,  F21V7/22 ,  F21Y2103/00

    摘要： An improved task light is comprised of a housing having a center cavity portion, a light passage opening below the center cavity portion, and an edge cavity for supporting a light source that emits light from the housing's edge cavity portion into its center cavity portion. A reflector, at least a portion of which spans the center cavity portion of the housing and which portion has a proximal and distal edge in relation to the light source, lies along a path that curves inwardly of the housing such that, when the reflector is viewed through the housing's light passage opening from the level of a task surface below the task light and from any position to the front of the task light, the luminance of the spanning portion of the reflector from reflected source light is substantially uniform over substantially the entirety of the spanning portion of the reflector. By maintaining the spanning portion of the reflector at a low luminance level, preferably below approximately 250 footlamberts, the reflector, as an operatively luminous optical element that presents itself to the task area, can be substantially eliminated as a source of reflected glare. In a lens version of the invention, a lens covers the housing's light passage opening and becomes the luminous optical element presented to the task area having a uniform low luminance. The lens can advantageously be used to achieve uniform light distributions within the task area.

    摘要翻译： 改进的任务光由具有中心空腔部分，中心腔部分下方的光通道开口和用于支撑从壳体的边缘腔部分发射到其中心空腔部分的光源的边缘腔体的壳体构成。 反射器，其至少一部分跨越壳体的中心空腔部分，并且哪个部分具有相对于光源的近侧和远端边缘，沿着沿壳体向内弯曲的路径，使得当反射器是 通过外壳的灯光通道从任务光线下方的任务表面和任务光线的任何位置到前方观察，反射器的反射器的跨越部分的亮度在基本上整体上基本均匀 的反射器的跨越部分。 通过将反射器的跨越部分保持在低亮度水平，优选地低于大约250英尺的厚度，作为反射眩光源的反射器可以基本上被消除，作为其自身到达任务区域的可操作发光的光学元件。 在本发明的透镜版本中，透镜覆盖壳体的光通道开口，并且变成具有均匀低亮度的任务区域的发光光学元件。 透镜可以有利地用于在任务区域内实现均匀的光分布。

    Lensed luminaire with lens brightness control and method
    47.
    发明授权
    Lensed luminaire with lens brightness control and method 失效
    具有镜头亮度控制和方法的照明灯具

    公开(公告)号：US5192128A

    公开(公告)日：1993-03-09

    申请号：US709838

    申请日：1991-06-04

    申请人： Peter Y. Y. Ngai

    发明人： Peter Y. Y. Ngai

    IPC分类号： F21V7/00 ,  F21V8/00 ,  F21V17/02

    CPC分类号： F21V17/02 ,  F21S8/04 ,  F21V14/08 ,  F21V7/0016 ,  F21V7/0025 ,  F21V5/02 ,  F21W2131/402 ,  F21Y2103/37 ,  F21Y2113/00

    摘要： A luminaire, and typically an indirect luminaire, is provided with at least one visible lens element or other light transmissive media, the observable brightness of which is intended to enhance the performance of the luminaire in terms of providing a psychologically pleasing lighting environment. The brightness induced in the lens element is controlled by directing source light to the lens through a confined indirect light path provided by reflector components within the luminaire. Additionally, a light shield is provided internally of the luminaire to prevent direct source light from reaching the lens element. Preferably, at least one of the reflector components in the indirect light path is a diffuse reflector such that source light incident on the lens element is diffuse light. The amount of diffused source light reaching the lens element along the indirect light path is controlled by adjusting the size of an aperture disposed in the light path; any contributions to lens brightness from light reflected back from interior wall surfaces can be controlled or eliminated, if needed or desired, by a separate light shield element provided for this purpose. In accordance with the invention, the level of lens brightness can readily be controlled and the effects of the surrounding mounting environment for the fixture on lens brightness minimized or eliminated. Also eliminated will be the potential for hot spots on the lens, while overall uniformity of lens brightness will be improved.

    摘要翻译： 至少一个可见透镜元件或其他光透射介质，照明设备和典型的间接照明设备具有可观察到的亮度旨在提供照明设备在提供心理上令人愉悦的照明环境方面的性能。 通过由照明器内的反射器部件提供的受限的间接光路将源光引导到透镜来控制透镜元件中引起的亮度。 此外，在照明器的内部设有遮光罩以防止直接光源到达透镜元件。 优选地，间接光路中的至少一个反射器部件是漫反射器，使得入射在透镜元件上的光源是漫射光。 通过调节设置在光路中的孔的尺寸来控制沿着间接光路到达透镜元件的扩散源光的量; 如果需要或期望，可以通过为此目的提供的单独的遮光元件来控制或消除对从内壁表面反射的光的透镜亮度的任何贡献。 根据本发明，可以容易地控制透镜亮度的水平，并且将器件周围的安装环境对透镜亮度的影响最小化或消除。 同样消除的将是镜头上的热点的潜力，同时镜头亮度的整体均匀性将得到改善。