04792931 is referenced by 14 patents and cites 15 patents.

A detector for detecting the acceleration, the velocity or the displacement of a point is described. The detector includes a light source, at least two photoelectric elements spaced apart from each other over a predetermined distance and a focusing optical system disposed between the light source and the photoelectric elements; the combination being particularly suited for use as an optical seismic detector for detecting and mapping an underground stratum structure.

Title
Optical seismic detector
Application Number
6/910585
Publication Number
4792931
Application Date
September 23, 1986
Publication Date
December 20, 1988
Inventor
Masamichi Kondo
Tama
JP
Masaharu Suzuki
Kawasaki
JP
Mansanari Shindo
Hachioji
JP
Katsuhiko Nishida
Kawasaki
JP
Agent
Peter Y Lee
Henry N Garrana
Keith Smith
Assignee
Schlumberger Technology Corporation
NY, US
IPC
G01H 1/00
H04R 11/00
H04R 1/02
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