Abstract: A method and apparatus for continuously synthesizing oriented carbon nanotubes, with which oriented carbon nanotubes can be stably synthesized in large quantities, is presented. The method and apparatus for continuously synthesizing oriented carbon nanotubes comprise: a coating and drying step in which a catalyst liquid is applied and dried to form a catalyst layer on a substrate surface; a catalyst substrate formation step in which the catalyst layer is heated to form a catalyst substrate having a catalyst particle layer on the substrate surface; a synthesis step in which a raw material gas heated to a temperature equal to or higher than a synthesis temperature for the oriented carbon nanotubes is brought into contact with the surface of the catalyst substrate to synthesize oriented carbon nanotubes; and a collection step in which the oriented carbon nanotubes are collected.

Abstract: A spectrum analyzer comprising various components. In the analyzer, a high-frequency signal processing circuit frequency-converts an object signal including waves recurring for a short period of time, into an intermediate-frequency signal, by using a local oscillation signal swept continuously over a desired range of frequencies, and thereby outputs a frequency spectrum of the object signal. A demodulator demodulates the frequency spectrum output by the high-frequency signal processing circuit. A selection signal supplying section supplies a selection signal for selecting that portion of the spectrum output by the demodulator, which lies waves to be analyzed. A control section outputs said portion of the spectrum output by the demodulator, in accordance with the selection signal output from the selection signal supplying section. A display displays the frequency spectrum output by the control section.

Abstract: A timing signal generating circuit generates a timing signal for each sweep timing period. An address generating circuit generates an address corresponding to each sweep timing period and to the magnitude of the input signal, each time it receives the timing signal. An image memory stores data in the address generated by the address generating circuit. A computing unit performs, upon each receipt of the timing signal, a predetermined computation on that data stored in the image memory and generates a result of computation. The computation result represents the frequency of the same address generated for each sweep timing period. A display unit displays the input signal with a luminance level corresponding to the computation result.