Radiation detector and a method thereof

A method of fabricating a radiation detector for detecting incident radiation received at a first side of the radiation detector, the method comprising:

• providing a scintillator with a first refractive index for converting the incident radiation into converted radiation;
• providing a photosensor for receiving the converted radiation from the scintillator, regions of the scintillator on which the incident radiation impinges are arranged for being imaged onto corresponding regions of the photosensor;
• and
• providing an optical coating layer with a second refractive index between the scintillator and the photosensor, the second refractive index being lower than the first refractive index for substantially reflecting the converted radiation resulting from the incident radiation impinging on a particular one of the regions of the scintillator and received by a region of the optical coating layer corresponding to a region of the photosensor different from the imaged one,
• wherein providing the optical coating layer comprises:
• dispensing a nano-porous coating material on a surface of the scintillator;
• and
• spinning the scintillator such that the nano-porous coating material is conformally dispensed on the surface;
• and,
• after spinning to conformally dispense the nano-porous coating material on the surface of the scintillator,
• dispensing a binder material;
• and
• spinning the scintillator with the binder material on the nano-porous coating material.