Configurable optical module and LED assembly

1. An optical module for a LED assembly, the optical module comprising a plurality of optical elements and a plurality of mounting structures, each mounting structure comprising a stepped arrangement of mounting elements, in which each mounting element defines a step of the stepped arrangement, each step defining a different mounting height for the optical module, and wherein each mounting structure is rotatable.

2. The optical module of claim 1 , wherein each mounting structure comprises a plurality of sections defining a surface of the mounting structure, each section comprising said stepped arrangement.

3. The optical module of claim 2 , wherein said sections combine to define a perimeter of the mounting structure.

4. The optical module of claim 1 , wherein each mounting element is a mounting pin extending from the optical module.

5. The optical module of claim 1 , further comprising a screw hole extending through the optical module and at least one stepped arrangement of mounting elements is arranged around a perimeter section of said screw hole.

6. The optical module of claim 1 , wherein the optical module is made of an optical grade polymer.

7. A LED assembly including a carrier comprising a pattern of LEDs and at least one optical module of claim 1 positioned on the carrier such that each optical element is optically aligned with a respective one of said LEDs and one of the steps of the respective mounting structures contacts the carrier.

8. The LED assembly of claim 7 , wherein the carrier comprises a plurality of apertures, each aperture shaped to receive part of the stepped arrangement of one of said mounting structures such that one of the mounting elements of said stepped arrangement contacts the carrier adjacent to said aperture.

9. The LED assembly of claim 7 , comprising a plurality of said optical modules, said optical modules combining to form an optical assembly.

10. A luminaire comprising a housing, said housing comprising the LED assembly of claim 7 .

11. The luminaire of claim 10 , wherein the luminaire is an outdoor luminaire.

12. A method of assembling a LED assembly, the method comprising:

providing an optical module comprising a plurality of optical elements and a plurality of mounting structures, each mounting structure comprising a stepped arrangement of mounting elements, in which each mounting element defines a step of the stepped arrangement, each step defining a different mounting height for the optical module;

providing a carrier comprising a pattern of LEDs; and

positioning the optical module on the carrier such that one of the mounting elements of the respective mounting structures contacts the carrier and each optical element is optically aligned with one of said LEDs

wherein each mounting structure is a rotatable mounting structure, the method further comprising setting the mounting height (H 3 ) of the optical module by rotating each mounting structure to select the step of the plurality of steps to contact the carrier.

13. The method of claim 12 , wherein providing said carrier comprises forming a plurality of apertures in said carrier, each aperture shaped to receive part of the stepped arrangement of one of said mounting structures such that a selected one of the mounting elements of said stepped arrangement contacts the carrier adjacent to said aperture.