Translations:The Nyquist frequency/3/en

is called the Nyquist range, which is of total length ${\rm {2}}\pi {\rm {/}}\Delta t$. As we have seen, any actual rotation always appears as an apparent rotation within the Nyquist range. For example, the actual angular frequency $\omega {\ =}\pi {\ /}\left({\rm {6}}\Delta t\right)$ is already in the Nyquist range, so in this case, the apparent angular frequency is the same as the actual angular frequency. Because the cyclic frequency f is $\omega {\ /2}\pi$, the cyclic Nyquist frequency is