| 摘要 |
A laser interferential vibrometer includes a laser along measuring beam path of which a phase plate λ/2 and optical unit of interferometer with receiving system comprising two photodiodes are placed in sequence. At the reference arm of interferometer a phase plate λ/8 and a flat mirror are placed, and at the measuring arm a surface which vibrations are measured is placed. In the optical system the flat reference mirror is replaced by a spherical one, in the receiving system the photodiodes are replaced by two matrices of receivers, and microprocessor is added, there the interferograms obtained are processed. |
