LED night vision imaging system lens and backlight assembly

A method of producing a light emitting diode (LED) night vision imaging system (NVIS) lens apparatus for use in providing filtering of a plurality of night-mode LEDs, the method comprising:

• laminating a layer of NVIS filter material between first and second sheets of polycarbonate or polymeric material to form laminated layers by positioning a first layer of adhesive between the first sheet of polycarbonate or polymeric material and the layer of NVIS filter material and positioning a second layer of adhesive between the second sheet of polycarbonate or polymeric material and the layer of NVIS filter material to form the laminated layers;
• molding the laminated layers to form recesses in the laminated layers, the recesses sized such that each of a plurality of night-mode LEDs are alignable with a separate single recess;
• cutting apertures in the laminated layers;
• and
• positioning the laminated layers of the NVIS lens apparatus relative to an LED array such that the recesses in the laminated layers are positioned in front of night-mode LEDs with each night-mode LED having only one recess positioned in front thereof and such that the apertures in the laminated layers are positioned in front of day-mode LEDs.

A method of producing a light emitting diode (LED) night vision imaging system (NVIS) lens apparatus for use in providing filtering of a plurality of night-mode LEDs, the method comprising:

• coating a first sheet of polycarbonate or polymeric material with an NVIS filter material and curing the NVIS filter material;
• forming a stack of lens apparatus layers such that the NVIS filter material coated on the first sheet of polycarbonate or polymeric material is positioned between the first sheet of polycarbonate or polymeric material and a second sheet of polycarbonate or polymeric material;
• molding the stack of lens apparatus layers including the NVIS filter material to form recesses in the stack, the recesses each sized to interface with a single night-mode LED such that each of a plurality of night-mode LEDs can interface with a recess and have only one recess positioned in front thereof;
• cutting apertures in the stack of lens apparatus layers using a stamping process or a laser cutting process;
• and
• positioning the stack of lens apparatus layers relative to an LED array such that the recesses in the stack of lens apparatus layers are positioned in front of night-mode LEDs and such that the apertures in the stack of lens apparatus layers are positioned in front of day-mode LEDs.