Patent ID: 11874478
Assignee: GOLDEN GATE LIGHT OPTIMIZATION LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A range finding system comprising:
a. a source of light projected at a target;
b. a lens assembly having an optical axis, the lens assembly positioned to gather light from the source of light reflected by the target, the lens assembly further comprising:
i. a first lens, having an optical axis and refractive optical power, and further having a region formed within the first lens capable of allowing light to pass without interaction with the first lens' refractive optical power formed within said first lens;
ii. a second lens, having a second optical axis and a second refractive optical power lower than the first lens' refractive optical power;
iii. a mounting member fixing in the second lens within the region formed within the first lens capable of allowing light to pass without interaction with the first lens' refractive optical power of the first lens at a desired spacing both along the optical axis of the lens assembly, and in at least one other position measured from a normal to the optical axis of the lens assembly, where the optical axis of the first lens and the second optical axis of the second lens are coaxial;

c. a detector positioned so that the lens assembly is between the target and the detector so at least some light passing through the lens assembly illuminates at least part of the detector generating an electrical signal; and
d. a signal processor connected to the detector that receives at least part of the electrical signal from the detector and computes a range from the lens assembly or detector to the target based in part on that electrical signal.