Controlled by an optical switch, a fiber Bragg grating sensing system based on spatial division multiplexing is developed under a broad-band source illumination.

介绍了一种光纤光栅空分复用传感系统，并将光纤光栅的传感特性应用于结构健康检测系统中。

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This is because, with a broad source, light rays hit your subject from more directions, which tends to fill in shadows and give more even illumination to the scene.

这是因为光源越广，射在物体上光线的方向就越多，这会起到增加场景中的照明、减少阴影的作用。

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LED light sources complying with these specifications are utilized as the source of illumination in lighting products that comply with the appropriate end-product standard as listed below.

符合规范要求的LED光源被用作灯具产品的照明源，这些灯具产品都要符合到如下所列的其对应的成品安全标准要求。

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Even at the awkward angle from which we view the picture, we read it from left to right, as we do the sequence of the three paintings, but we also read from right to left, from the source of illumination above to its objects below.

WSJ: The Calling of St. Matthew | A Dramatic Enlightenment | Masterpiece by Willard Spiegelman

These explosion proof LED flashlights are ideal for operators in hazardous and non hazardous locations who need a highly reliable yet powerful and long lived source of portable illumination for activities such as utilities repairs and plant inspections.

ENGADGET: Explosion-proof flashlight could be the first to outlive its owner

Admittedly, this unusual memory requires an internal light source, but the amount of illumination required is tiny and consumes less power than the logic circuits that are used to read data in and out.

ECONOMIST: Just press print