Several embodiments are disclosed of bar code readers in which one or more piezoelectric bimorph elements are utilized as a drive element in the optical system thereof. In different embodiments, the piezoelectric bimorph element is utilized in the scanning function of the bar code reader optical system,...http://www.google.fr/patents/US5170277?utm_source=gb-gplus-shareBrevet US5170277 - Piezoelectric beam deflector
