Answer :

The term denoting the highest spatial frequency that can be recorded by a digital detector is 'spatial resolution.' It refers to the detector's ability to distinguish between the smallest separate elements in an image, which relies on the sampling frequency being at least twice the highest frequency present in the signal.

Definition of the Highest Spatial Frequency

The highest spatial frequency that can be recorded by a digital detector is denoted by the term spatial resolution. This refers to the detector's ability to distinguish between the smallest separate elements in an image. According to Nyquist theory, to avoid aliasing and accurately record a frequency, the sampling frequency must be at least twice the highest frequency present in the signal. For detectors in optical systems, like a digital camera's sensor, the spatial resolution is limited by factors such as the sensor's pixel size and the quality of the imaging lenses.

For example, modern digital detectors such as CCD cameras can provide high spatial resolution, capable of capturing fine details within an image. In neuroscience, this high spatial resolution is crucial for areas such as imaging small structures in the brain. Additionally, when discussing screens or monitors, a high pixel density (measured often as pixels per line) relates to the concept of spatial frequency, which impacts how finely detailed the displayed image can be.

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