There is provided a device for reducing laser speckle comprising: a micro scanner and a holographic diffuser. The micro scanner device comprises: a first transparent optical substrate with an input surface and an output surface; a second transparent optical substrate with an input surface and an output surface and a variable refractive index medium sandwiched between the output surface of the first substrate and the input surface of the second substrate. Transparent electrodes are applied to the output surface of the first substrate and the input surface of the second substrate. The electrodes are coupled to a voltage generator. The input surface of the first substrate is optically coupled to a laser source. The input surface of the second substrate is configured as an array of prismatic elements. Advantageously, at least one of the input surface of the first substrate or the output surfaces of the second substrate is planar. At least one of said transparent electrodes is patterned into independently addressable electrode elements. The average refractive index of any region of said variable refractive index medium is proportional to the voltage applied across the electrode elements sandwiching said region. The micro scanner deflects input light from the laser source into output light at an angle determined by the refractive index of the substrates and the average refractive index of the variable refractive index medium. The voltage applied across each electrode element is varied temporally. Each point in the holographic diffuser diffracts incident light rays of a predefined angle into output light rays having a predefined range of angles to form a diffuse illumination patch.
