Patent ID: 9546946
Date: 2017-01-17
CPC Classifications: F16F,G01N,G10K

Claim:
1. A metrology tool comprising: at least one active vibration isolation device; and, at least one passive vibration isolation device, wherein at least one of the at least one active vibration isolation devices or at least one passive vibration isolation devices, is selected from a group consisting of: A) a constrained layer damper and at least one particle or liquid impact damper within a supporting structure of the metrology tool; B) at least one noise cancellation transducer arranged to reduce mechanical frequencies by cancelling noise; C) at least one noise cancellation transducer arranged to detect a vibration wave and generate an opposite wave having reversed polarity; D) at least one acoustic skin with at least one noise cancellation transducer configured to isolate the tool from acoustic vibrations in an environment of the tool; E) at least one acoustic transducer applied to at least one of a tool base table and optics' supporting structures; and, F) combinations thereof.