Semiconductor lens optimization of fabrication
Embodiments comprise a system created through fabricating a lens array through which lasers are emitted. The lens array may be fabricated in the semiconductor substrate used for fabricating the lasers or may be a separate substrate of other transparent material that would be aligned to the lasers. In some embodiments, more lenses may be produced than will eventually be used by the lasers. The inner portion of the substrate may be formed with the lenses that will be used for emitting lasers, and the outer portion of the substrate may be formed with lenses that will not be used for emitting lasers—rather, through etching these additional lenses, the inner lenses may be created with a higher quality.
1. A system for manufacturing lenses, the system comprising:
a processor; and
one or more memories in communication with the processor, the one or more memories having stored thereon instructions that, upon execution by the processor, at least cause lens manufacturing equipment to:
form a lens array with a plurality of lenses, wherein the lens array further comprises an inner portion with a first set of lenses and an outer portion with a second set of lenses, wherein the second set of lenses is positioned adjacent to and surrounds the first set of lenses, wherein the first set of lenses is surrounded by lenses of either the first set of lenses or the second set of lenses; and
physically position each laser among a plurality of lasers to align or misalign with a respective lens in the first set of lenses, such that respective beams of the plurality of lasers are incident on respective lenses in the first set of lenses, and do not physically position any laser to align or misalign with any of the lenses in the second set of lenses.
2. The system of claim 1 , wherein the instructions that cause the lens manufacturing equipment to form a lens array cause the lens manufacturing equipment to etch a layer of photoresist over a substrate to form the lens array, wherein the etch is accomplished by at least one of: a wet etching process, an anisotropic wet etching process, a plasma etching process, and a dry etching process.
3. The system of claim 2 , wherein the instructions that cause the lens manufacturing equipment to etch the layer to form the lens array cause the lens manufacturing equipment to transfer a pattern from photoresist into the substrate.
4. The system of claim 1 , wherein the lens array is circular in configuration.
5. The system of claim 1 , wherein the plurality of lasers are positioned on the opposite side of a substrate from the lens array and wherein each laser is configured to emit light into each lens in the first set of lenses.
6. The system of claim 5 , wherein a first laser, of the plurality of lasers, is aligned to the center of a first lens from the first set of lenses and a second laser, of the plurality of lasers, is aligned to be off-center of a second lens from the first set of lenses.
7. The system of claim 1 , wherein a substrate is deposited with a thick material to serve as a protective height barrier and prevent scratches.
8. The system of claim 1 , wherein each lens of the first set of lenses comprises a substantially similar Radius of Curvatures (ROCs) and wherein each lens of the first set of lenses is configured to be a length of at least two lenses from a border of a substrate.
9. The system of claim 1 , wherein a distance from a center of any lens among the first set of lenses or the second set of lenses and the center of any adjacent lens is the same.
10. The system of claim 1 , wherein a first lens in the first set of lenses comprises a smaller pitch than a second lens in the first set of lenses.
11. The system of claim 1 , wherein the instruction that cause the lens manufacturing equipment to form the lens array control a greyscale photolithography process.
12. The system of claim 11 , wherein the instructions that cause the lens manufacturing equipment to form the lens array cause the lens manufacturing equipment to transfer a pattern of lens shapes to a substrate.
13. A system for manufacturing lenses, the system comprising:
a processor; and
one or more memories in communication with the processor, the one or more memories having stored thereon instructions that, upon execution by the processor, at least cause lens manufacturing equipment to:
form a lens array with a plurality of lenses, wherein the lens array further comprises an inner portion with a first set of lenses and an outer portion with a second set of lenses, wherein the second set of lenses is positioned adjacent to and surrounds the first set of lenses, wherein the first set of lenses is surrounded by lenses of either the first set of lenses or the second set of lenses,
wherein each lens in the first set of lenses has a substantially similar first radius of curvature, and
wherein each lens in the second set of lenses having a second radius of curvature that is different from the first radius of curvature; and
position each laser among a plurality of lasers to align or misalign with a respective lens in the first set of lenses, such that respective beams of the plurality of lasers are incident on respective lenses in the first set of lenses, and do not position any laser to align or misalign with any of the lenses in the second set of lenses.
14. The system of claim 13 , wherein the instructions that cause the lens manufacturing equipment to form a lens array cause the lens manufacturing equipment to etch a layer of photoresist over a substrate to form the lens array, wherein the etch is accomplished by at least one of: a wet etching process, an anisotropic wet etching process, a plasma etching process, and a dry etching process.
15. The system of claim 14 , wherein the instructions that cause the lens manufacturing equipment to etch the layer to form the lens array cause the lens manufacturing equipment to transfer a pattern from photoresist into the substrate.
16. The system of claim 13 , wherein the lens array is circular in configuration.
17. The system of claim 13 , wherein the plurality of lasers are positioned on the opposite side of a substrate from the lens array and wherein each laser is configured to emit light into each lens in the first set of lenses.
18. The system of claim 17 , wherein a first laser, of the plurality of lasers, is aligned to the center of a first lens from the first set of lenses and a second laser, of the plurality of lasers, is aligned to be off-center of a second lens from the first set of lenses.
19. The system of claim 13 , wherein a substrate is deposited with a thick material to serve as a protective height barrier and prevent scratches.
20. The system of claim 13 , wherein a first lens in the first set of lenses comprises a smaller pitch than a second lens in the first set of lenses.