| 摘要 |
<p>Runout is detected photoelectrically. The bobbin has a spindle, to one plate on which a strip of retro reflecting material is applied. The strip consists of an elastomer underlay and a surface layer with hard, abrasion-resistant retro-reflecting elements which are partly imbedded in the underlay and partly lie free, to reflect light from a light source. Pref. the elastomeric base layer is made from an epoxide resin and a polyetherpolyamine hardener.</p> |
