| 摘要 |
In accordance with illustrative embodiments of the present invention, techniques are described for producing relatively even density recordings of well logging signals even when the frequency of these signals, or the velocity of the recording medium, varies. To accomplish this, with optical recording means for example, the rate of movement of the recording light beam across the recording medium and the rate of movement of the recording medium itself are measured. Signals representative of these measured rates or velocities are processed and used to adjust a parameter of the light source which produces the recording light beam to cause a relatively even density recording to be produced.
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