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PCE
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DIFF Subgroup
G01B 9/021

using holographic techniques

Introduced: July 1974

Full Title

Measuring instruments characterised by the use of optical techniques > Interferometers > using holographic techniques

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

Child Classifications

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  • G01B 9/023 for contour producing (G01B9/025 - G01B9/029 take precedence) since 1974 IPC+CPC Available in IPC and CPC
  • G01B 9/025 Double exposure technique since 1974 IPC+CPC Available in IPC and CPC
  • G01B 9/027 in real time since 1974 IPC+CPC Available in IPC and CPC
  • G01B 9/029 by time averaging since 1974 IPC+CPC Available in IPC and CPC