Abstract: There is proposed an illuminating device, comprising (a) a luminous element, (b) a support, and (c) a primary optical element, characterized in that (i) said luminous element (a) is present on the support (b), and (ii) said primary optical element (c) is arranged on a composite of luminous element (a) and support (b) in such a way that it takes up, directs and emits the radiation emerging from the luminous element in the desired light distribution, wherein (iii) said primary optical element (c) is fabricated from a high refractive index glass and (iv) attached to the support by direct bonding.

Abstract: There is proposed an illuminating device, comprising (a) a luminous element, (b) a support, and (c) a primary optical element, characterized in that (i) said luminous element (a) is present on the support (b), and (ii) said primary optical element (c) is arranged on the composite of luminous element (a) and support (b) in such a way that it takes up, directs and emits the radiation emerging from the luminous element in the desired light distribution, wherein (iii) said primary optical element (c) is fabricated from a high refractive index glass and (iv) attached to the support by direct bonding.