光電開(kāi)關(guān)檢測(cè)技術(shù)ppt課件(編輯修改稿)
2025-01-04 03:21 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 接收器，當(dāng)被檢測(cè)物體經(jīng)過(guò)且完全阻斷光線時(shí)，光電開(kāi)關(guān)就產(chǎn)生了檢測(cè)開(kāi)關(guān)信號(hào)。 Retroreflective type General use With polarizing filters With polarizing filters With polarizing filters With polarizing filters Opposite types of polarizing filters are placed in front of the emitting and receiving elements. A horizontal polarizing filter placed in front of the emitting element passes only horizontally polarized light and a vertical polarizing filter placed in front of the receiver ensures that only vertically polarized light is received. Using this configuration, even specular objects can be reliably detected. With polarizing filters 1 Normal unpolarized beam emitted from the LED oscillates in a random manner. As it passes through the horizontal polarizing filter, the oscillation is aligned horizontally and the beam is horizontally polarized. 2 When
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