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US07751044B2 Optical sensors for downhole measurements using birefringent materials 失效
用于使用双折射材料的井下测量的光学传感器

Optical sensors for downhole measurements using birefringent materials
Abstract:
A sensor for measuring in a borehole at least one of orientation, acceleration and pressure, the sensor including: a light source; a birefringent material receiving light from the source; and a photodetector for measuring light transmitted through the birefringent material to measure the at least one of orientation, acceleration and pressure.
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