| 摘要 |
<p>A method and an apparatus for cleaning control by measuring the degree of dirt on a surface by means of a dust collecting adhesive foil by optically measuring an area of the adhesive foil exposed to dust and by comparing the obtained measuring value to a reference value. The optical measuring is effected by means of a laser beam source with associated optical members for generating a beam of substantially parallel laser rays that are made to pass substantially perpendicular through the adhesive foil and to be successively focused on a detector for display on a measuring instrument. The simple method and design of the apparatus provide inter alia for making the apparatus portable.</p> |
