Patent ID: 11874606
Assignee: NOVA LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G

Claim 15:
16. A method for controlling measurements of various sample's parameters, the method comprising:
providing measured data indicative of multiple measured signals affected by parameters of a sample; and
utilizing at least one predetermined model to apply model-based processing to the measured data, and determine, for each of one or more parameters of interest, an estimated upper bound value for an individual measurement for said parameter, and generate output data indicative thereof;
wherein said data processing comprises:
applying a training stage to at least one predetermined model to obtain a corresponding at least one trained model and using said trained model to determine a functional relation between the measured signals and upper bounds of errors for sample's parameters affecting the measured signals; and
performing an inference test stage by applying said functional relation to the measured data, to associate the estimated upper bound of the error value individually with each of said one or more parameters of a sample being measured;
wherein said training stage of the model-based processing comprises:
while training said at least one predetermined model using the measured data and trainset, determining a distance metric, DF, in a signal parametric space, and obtaining a trained model;
utilizing predicted model parameters of the trained model to determine a distance metric, DE, in an error parametric space, for predicted measurement errors with respect to the model trainset; and
determining a relation between the upper bounds of errors for the sample's parameters and said distance metric DE, thereby defining said functional relation between the measured signals and the upper bounds of the errors.