| 摘要 |
A transmitting element for light barriers, light grids and the like has a light source preferably configured as a semiconductor element, whose light-emitting surface has linear dimensions of less than 500 mum. In front of the light-emitting surface of the light source, at a distance of at least 5 mm, is a pin-hole diaphragm with an aperture of a diameter of less than 3 mm. The transmitting element is covered by a transparent front glass pane.
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