暗場照明環形光導管附件

暗場照明是檢測與機器視覺應用不可或缺的工具，尤其是在檢視透明或大體透明的零件是否存在諸如邊緣或缺陷等內部或表面特徵(使用標準的背光照明或亮場前照明時會發生褪色)時，更是如此。

暗場照明的名稱主要源於背景昏暗，這與背光燈的亮場截然相反。將暗場附件置於環形光上時，會產生從光軸發散的錐形光。完全透明、無應變的物件不會展示任何影像。但是，邊緣、特徵及灰塵會朝光軸方向重新導引光線，並以高對比度記錄在場的其餘領域中。

Differential color illumination can be achieved by using Area Backlights and filtering the illuminator (via color filters) at the input end of the fiber optic light guide.

The darkfield attachment can only be used with ring light #54-173. The attachment conveniently snaps onto either ring light guide easily using a rubber O-Ring. This replaces the hassle of set screws and allows the Darkfield Attachment to be rotated. The window is held in place by a split ring rubber gasket and can be removed. The ring light guide requires a light guide adapter to attach to the illumination source. For proper contrast, our Light absorbing black out material is highly recommended.

Light absorbing black out material is also useful to ensure a pure black background. The black out material is available in various sizes and can be easily cut to size.

Note: Edmund Optics has lowered the prices of the Replacement Window #54-827 more than 30%! Supplies are limited! Prices shown reflect discount.