Patent ID: 11965798
Assignee: APPLIED MATERIALS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 19:
20. The method of claim 19, further comprising:
directing, through the achromatic lens of the collimator assembly, a third plurality of spectral components of a second light beam of the incident light transmitted through the second emitting optical fiber to a third portion of the substrate surface and a fourth plurality of spectral components of the second light beam to a fourth portion of the substrate surface, wherein the third portion is substantially the same as the fourth portion; and
receiving, from the light detection component, a third plurality of reflected spectral components and a fourth plurality of reflected spectral components collected by the achromatic lens of the collimator assembly, the third plurality of reflected spectral components produced by the third plurality of spectral components directed onto the third portion of the substrate surface and the fourth plurality of reflected spectral components produced by the fourth plurality of spectral components directed onto the fourth portion of the substrate surface, wherein the third plurality of reflected spectral components and the fourth plurality of reflected spectral components are transmitted from the achromatic lens to the light detection component via the second receiving optical fiber of the second set of optical fibers,
wherein the reflectance of the substrate surface is further determined based on the third plurality of reflected spectral components and the fourth plurality of reflected spectral components.