Optical seismograph with perpendicular pendulums - uses collimated light beam reflected off mirrors on pendular extremities
Номер патента: FR2359432A1
Опубликовано: 17-02-1978
Автор(ы): Ali Sekhavat, Ali-Reza Bahrampour
Принадлежит: Ali Sekhavat
Опубликовано: 17-02-1978
Автор(ы): Ali Sekhavat, Ali-Reza Bahrampour
Принадлежит: Ali Sekhavat
Реферат: An optical seismograph includes a collimated beam of light generated by a source (2). The beam is monitored by a first photo detector (8) along a path derived from a beam splitter (6). A second beam splitting mirror (14) directs the beam to a pair of pendulums (18) and (24). The pendulums swing about orthogonal axes and carry reflecting mirrors which redirect the collimated beam onto respective photodetectors (26) and (25) from which an indication of seismic activity can be derived.
Optical seismograph
Номер патента: US4119173A. Автор: Ali Sekhavat,Ali-Reza Bahrampour. Владелец: Individual. Дата публикации: 1978-10-10.