Title:
HOLOGRAPHY FLAW DETECTING METHOD
Document Type and Number:
Japanese Patent JPH01123121
Kind Code:
A
Abstract:
PURPOSE:To implement a compact configuration and a low cost, in a method for detecting flaws based on interference fringes by vibrating a body, by projecting part of the output of a pulse laser and vibrating the body with the shock, while making a mechanical vibration applying device unnecessary. CONSTITUTION:A beam splitter 22 is provided immediately after a pulse laser 3. Transmitted light 23 is projected on a first mirror 5. A body to be checked 1 is lit through a concave lens 8 and the like. Reflected light 10 is guided to a photograph film 11. Transmitted light 12 through a splitter 6 is projected on the rear side of the body to be checked 1 through a mirror 25. Vibration is applied to a the body under test 1, which receives a beam 24, with the shock of the projection of the beam 24 in synchronization with hologram. Therefore, a vibration applying device is omitted, and the device can be made compact at low cost.
Inventors:
KURODA MASAHIRO
Application Number:
JP28113987A
Publication Date:
May 16, 1989
Filing Date:
November 09, 1987
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
G01H9/00; (IPC1-7): G01H9/00
Attorney, Agent or Firm:
Akasaka Saka (2 people outside)