| 摘要 |
PURPOSE:To obtain a probe for a solid state high resolution nuclear magnetic resonance device which is capable of measuring easily a revolving speed of a spinner, by utilizing a groove of a cover screwed to the upper part of a sample packing part of the spinner, chopping a luminous flux projected from the opening end of the groove, by a rotation of the spinner, and detecting a generated pulsative passing light. CONSTITUTION:A light emitting part 7 and a photodetecting part 8 are placed against a groove 20 of a cover 4 of the upper part of a spinner 2, and both the light emitting part 7 and the photodetecting part 8 divide an optical fiber into two. As for the position of said light emitting part 7 and photodetecting part 8, each position of the photodetecting part and the light emitting part can be replaced, and if only they are on the outside circumference of a locus drawn by the groove 20 of the cover 4 rotating with the spinner, and in a position where a result obtained by executing a passing and a cut- off of a light from the light emitting part 7 by a rotation of the groove 20 is reflected to the photodetecting part, it will do. Also, the number of peaks of a detecting signal is two per rotation of the spinner, namely, it becomes two count by a register, therefore, a revolving speed is derived by converting photoelectrically a photodetected light and executing an operation processing for multiplying the number of pulses per unit time by 1/2. |
