Patent ID: 11867507
Assignee: MLOPTIC CORP.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A system for providing a virtual distance (VD) of a device under test, said system comprising:
(a) a collimated light source;
(b) a wedge shear plate comprising a first surface, a second surface and a wedge angle, wherein said second surface is disposed at said wedge angle with respect to said first surface, said wedge shear plate is disposed at substantially about 45 degrees between the device under test and said collimated light source and said wedge angle is about 0.005-0.05 degrees;
(c) a first detector configured for receiving a first interference pattern formed as a result of a light beam of said collimated light source being reflected by the device under test before being disposed through and reflected by said first surface and said second surface of said wedge shear plate; and
(d) a second detector configured for receiving a second interference pattern formed as a result of the light beam of said collimated light source being disposed through and reflected by said first surface and said second surface of said wedge shear plate and said wedge shear plate is disposed between said first detector and said second detector,
wherein the VD is determined based on one or more properties of said first interference pattern, one or more properties of said second interference pattern, one or more properties of said collimated light source and one or more properties of said wedge shear plate.