Methods of forming anti-glare surface structure with co-located refractive index contrast in laminated glass substrates using ultrafast lasers and anti-glare light-transmitting structures with low sparkle and low distinctiness-of-image formed from such methods

The light-transmitting structure of 6, wherein the valleys are configured as depressions that extend into the first clad layer.

A method for forming a light-transmitting structure, comprising:

• irradiating a laminated glass substrate with a beam from a laser, the laminated glass substrate comprising a core layer and a first clad layer fused to the core layer, the core layer comprising a core glass composition that is transparent and has a core refractive index nC, the first clad layer defining a first surface of the laminated glass substrate and comprising a first clad glass composition that is transparent and has a first clad refractive index nCL1 that is lower than the core refractive index nC,
• wherein the irradiating is configured to form a plurality of interdiffusion regions that extend from the core layer into the first clad layer, each interdiffusion region comprising an interdiffusion composition that is transparent and has an interdiffusion refractive index nI that is higher than the first clad refractive index nCL1.