Integrated optical sensor, comprising: - a semiconductor substrate having a main surface, - an integrated circuit comprising at least one light sensitive component, the integrated circuit being arranged in the substrate at or near the main surface, - a dielectric layer comprising at least one compound of a semiconductor material, the dielectric layer being arranged on or above the main surface, - a wiring for providing an electrical connection to the integrated circuit, the wiring being arranged in the dielectric layer and being connected to the integrated circuit, - a structured filter layer arranged on the dielectric layer and facing the at least one light sensitive component, wherein the structured filter layer is adapted for diffused incident light by means of succession and properties of the layers which make up the filter, characterized in that the integrated optical sensor further comprises - a diffuser arranged on the structured filter layer, wherein the structured filter layer is arranged immediately on the dielectric layer and the diffuser is arranged immediately on the dielectric layer and structured filter layer such that the diffuser encloses the dielectric layer and structured filter layer, wherein - the diffuser comprises a translucent material further comprising light scattering particles, the light scattering particles having a size much larger than the wavelength of the diffused incident light such that the laws of geometric optics apply to describe the interaction of light with the particle, having a size between 1 to 15 μm, wherein the translucent material comprises an organic polymer compound or comprises a synthetic polymer compound, in particular an epoxy resin or a silicone rubber. - a semiconductor substrate having a main surface, - an integrated circuit comprising at least one light sensitive component, the integrated circuit being arranged in the substrate at or near the main surface, - a dielectric layer comprising at least one compound of a semiconductor material, the dielectric layer being arranged on or above the main surface, - a wiring for providing an electrical connection to the integrated circuit, the wiring being arranged in the dielectric layer and being connected to the integrated circuit, - a structured filter layer arranged on the dielectric layer and facing the at least one light sensitive component, wherein the structured filter layer is adapted for diffused incident light by means of succession and properties of the layers which make up the filter, - a diffuser arranged on the structured filter layer, wherein the structured filter layer is arranged immediately on the dielectric layer and the diffuser is arranged immediately on the dielectric layer and structured filter layer such that the diffuser encloses the dielectric layer and structured filter layer, wherein - the diffuser comprises a translucent material further comprising light scattering particles, the light scattering particles having a size much larger than the wavelength of the diffused incident light such that the laws of geometric optics apply to describe the interaction of light with the particle, having a size between 1 to 15 μm, wherein the translucent material comprises an organic polymer compound or comprises a synthetic polymer compound, in particular an epoxy resin or a silicone rubber.