Wide-angle illuminator module
A wide-angle illuminator module including a rigid support structure having a plurality of angled faces, a flexible circuit including one or more VCSEL arrays, each VCSEL array positioned over a face among the plurality of angled faces, each VCSEL array including a plurality of integrated microlenses with one microlens positioned over each VCSEL in the VCSEL array, and a driver circuit for providing electrical pulses to each VCSEL array, wherein the plurality of VCSEL arrays address illumination zones in a combined field of illumination. The support structure may also be a heatsink. The flexible circuit may be a single flexible circuit configured to be placed over the support structure or a plurality of flexible circuits, each including one VCSEL array.
1. A device, comprising:
a plurality of illumination zones,
wherein each illumination zone, of the plurality of illumination zones, comprises:
an array of emitters, and
an array of micro-lenses,
wherein each micro-lens, of the array of micro-lenses, corresponds to an emitter of the array of emitters, and
wherein, for one or more illumination zones of the plurality of illumination zones, each micro-lens of a respective illumination zone is offset in a same direction and distance relative to a corresponding emitter of the respective illumination zone.
2. The device of claim 1 , wherein the plurality of illumination zones comprises a first illumination zone and a second illumination zone,
wherein the first illumination zone comprises a first array of micro-lenses and the second illumination zone comprises a second array of micro-lenses, and
wherein the first array of micro-lenses is arranged such that beams directed from the first array of micro-lenses are directed at a different angle than beams directed from the second array of micro-lenses.
3. The device of claim 1 , further comprising:
a diffusor arranged to expand beams emitted from the plurality of illumination zones.
4. The device of claim 1 , further comprising:
one or more drivers configured to control the plurality of illumination zones.
5. The device of claim 1 , further comprising:
one or more external optics,
wherein the array of micro-lenses is arranged between the array of emitters and a corresponding external optic of the one or more external optics, and
wherein the corresponding external optic is configured to change directions of beams received from the array of micro-lenses.
6. The device of claim 1 , wherein the one or more illumination zones are one or more first illumination zones, and
wherein, for one or more second illumination zones of the plurality of illumination zones, a center micro-lens, of a respective illumination zone, is arranged to have zero offset relative to a corresponding emitter of the respective illumination zone.
7. The device of claim 6 , wherein other micro-lenses, of the respective array of micro-lenses, that surround the center micro-lens are arranged to have offsets away from a center axis.
8. The device of claim 1 , wherein a plurality of emitter arrays, of the plurality of illumination zones, are arranged on a single die.
9. The device of claim 1 , wherein the array of emitters is fabricated on a surface of a die, and
wherein the array of micro-lenses is fabricated in a substrate of the die.
10. The device of claim 1 , wherein the array of emitters is fabricated on a surface of a die, and
wherein the array of micro-lenses is fabricated in a substrate that is bonded to the die.
11. The device of claim 1 , wherein each illumination zone is independently driven.
12. The device of claim 1 , further comprising:
an image sensor,
wherein each illumination zone, of the plurality of illumination zones, is dynamically controlled based on feedback from the image sensor.
13. The device of claim 1 , wherein the plurality of illumination zones comprises a first illumination zone and a second illumination zone,
wherein the first illumination zone comprises a different quantity of emitters than the second illumination zone.
14. The device of claim 1 , wherein the plurality of illumination zones comprises a first illumination zone and a second illumination zone,
wherein the first illumination zone comprises a first array of emitters and the second illumination zone comprises a second array of emitters, and
wherein the first array of emitters is fabricated on a first die and the second array of emitters is fabricated on a second die.
15. The device of claim 14 , wherein the first die and the second die are flip-chip bonded to a same submount.
16. The device of claim 1 , wherein the array of emitters is a vertical-cavity surface-emitting laser (VCSEL) array.
17. The device of claim 1 , further comprising:
a plurality of modules for mounting one or more emitter arrays of the plurality of illumination zones.
18. The device of claim 17 , wherein the plurality of modules are mounted to a prismatic heat sink structure.
19. The device of claim 1 , wherein the plurality of illumination zones comprises a first illumination zone and a second illumination zone, wherein a field of illumination of the first illumination zone overlaps a field of illumination of the second illumination zone.
20. The device of claim 1 , wherein the one or more illumination zones are one or more first illumination zones, and
wherein, for one or more second illumination zones of the plurality of illumination zones, each micro-lens, of a respective illumination zone, is arranged to have zero offset relative to a corresponding emitter of the respective illumination zone.