Dual lens receive path for LiDAR system

1. A light detection and ranging (LiDAR) system comprising:

a light source configured to generate a plurality of pulse signals that is transmitted by the LiDAR system;

a multi-lens assembly positioned along an optical receive path, wherein the multi-lens assembly comprises:

a concave lens, and

a field lens positioned downstream of the concave lens; and

a fiber configured to receive returned light pulses along the optical receive path from the multi-lens assembly, wherein the returned light pulses are formed based on the transmitted pulse signals.

2. The LiDAR system of claim 1 , wherein the concave lens is a concave cylindrical lens.

3. The LiDAR system of claim 1 , wherein the concave lens accounts for numerical aperture correction for the returned light pulses entering the fiber.

4. The LiDAR system of claim 1 , wherein the field lens is a cylindrical field lens.

5. The LiDAR system of claim 1 , wherein the field lens has a convex cylindrical shape.

6. The LiDAR system of claim 1 , wherein the field lens directs the returned light pulses into the fiber or a light detector.

7. The LiDAR system of claim 1 , further comprising:

one or more mirrors configured to steer the returned light pulse along the optical receive path.

8. The LiDAR system of claim 7 , wherein the field lens accounts for angle variation imposed on the returned light pulses by the one or more mirrors.

9. The LiDAR system of claim 7 , wherein the one or more mirrors include at least one of a polygon mirror and a parabolic mirror.

10. The LiDAR system of claim 1 , wherein a focal length of the concave lens is different than a focal length of the field lens.

11. The LiDAR system of claim 1 , wherein the fiber comprises a core and wherein the multi-lens assembly is configured such that a beam size resulting from the returned light pulses is optimized for entry into the core.

12. The LiDAR system of claim 1 further comprising:

a light detector configured to receive the returned light pulses from an end of the fiber.

13. A light detection and ranging (LiDAR) system comprising:

a steering system operative to steer a plurality of returned light pulses along an optical receive path;

a fiber configured to receive the plurality of returned light pulses along the optical receive path; and

a multi-lens assembly positioned along the optical receive path in between the steering system and the fiber, wherein the multi-lens assembly comprises:

a concave lens, and

a convex lens, the multi-lens assembly optimizing a spot beam produced by the plurality of returned light pulses for entry into the fiber.

14. The LiDAR system of claim 13 , wherein the concave lens is a concave cylindrical lens.

15. The LiDAR system of claim 13 , wherein the concave lens accounts for numerical aperture correction for the returned light pulses entering the fiber.

16. The LiDAR system of claim 13 , wherein the convex lens is a cylindrical convex lens.

17. The LiDAR system of claim 13 , wherein the steering system comprises one or more mirrors.

18. The LiDAR system of claim 13 , wherein the convex lens accounts for angle variation imposed on the returned light pulses from the steering system.

19. The LiDAR system of claim 13 , wherein the steering system comprises a polygon mirror and a parabolic mirror.

20. The LiDAR system of claim 13 , wherein the multi-lens assembly mitigates data loss of the returned light pulses entering the fiber.