In an integrated optical arrangement, such as a photoelectric position measuring arrangement, a diffraction grid is scanned by light beam diffraction by a scanning unit having a laser. A light beam bundle emanating from the laser is split by the diffraction grid into two diffraction beam bundles, which...http://www.google.de/patents/US5113066?utm_source=gb-gplus-sharePatent US5113066 - Integrated optical sensor arrangement with detecting means, and means for controlling the optical emission wavelength of the light beam source
