Holographic interferometer
Patent 4812042 Issued on March 14, 1989. Estimated Expiration Date: 
September 11, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 11, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References3871769 InventorsApplicationNo. 07/096609 filed on 09/11/1987US Classes:356/458, For optical configuration356/401, With registration indicia (e.g., scale)356/513Of highly reflective surface (e.g., mirror)ExaminersPrimary: Willis, Davis L.Assistant: Koren, Matthew W. Attorney, Agent or FirmInternational ClassesG01B 11/24 (20060101)G01B 9/021 (20060101) Foreign Application Priority Data1985-08-22 JPAbstractA holographic interferometer comprising a source of laser beams, a condenser lens for converging a laser beam supplied from said laser-beam source, a pinhole which allows the passage of said converged laser beam, a collimator lens having a focal point which lies on said pinhole, a beam splitter disposed in an inclined manner between said pinhole and said collimator lens, a spacial filter disposed on the optical axis of a light reflected from said beam splitter and at an optically conjugate position relative to said pinhole, and a hologram standard disposed between said spacial filter and said beam splitter.Field of SearchWith registration indicia (e.g., scale) | |
