Abstract: A laser projection apparatus includes a source for generating a laser beam, various optical elements for manipulating the laser beam in order to obtain a predetermined image projection of laser light, wherein the optical elements each have at least one optical axis, and connecting elements which connect the optical elements such that the optical axes of adjacent optical elements extend coaxially, which various optical elements are accommodated in separate modules, wherein the connecting elements are formed by couplings mutually coupling the modules so that direct mutual coupling of the modules with different optical elements ensures that the optical axes thereof extend coaxially and that the whole optical system is thus aligned.

Abstract: An apparatus for operating devices such as image, light and/or sound equipment, electromechanical equipment and so on, has at least one laser source for generating a continuous operating laser beam which is directed continuously, with or without reflection, at one or more sensors responding to light flux variations of the laser beam, and a control circuit containing each sensor for controlling the devices the laser beam generated by the laser source is wholly or partially masked so that physical contact with wear-susceptible operating means is not necessary and an object, for instance a hand, is simply placed into the laser beam.