Howtosignalprocessing
- What is the relationship between point spread function and numerical aperture?
- What is point spread function in optics?
What is the relationship between point spread function and numerical aperture?
Also, the Numerical Aperture (NA) of the objective lens that you use affects the size and shape of the PSF. A high-NA objective gives you a nice small PSF and, therefore, better resolution, as demonstrated in Figure 1 (an interactive version of this figure is available over at ZEISS Online Tutorials).
What is point spread function in optics?
The point spread function (PSF) describes the response of a focused optical imaging system to a point source or point object. A more general term for the PSF is the system's impulse response; the PSF is the impulse response or impulse response function (IRF) of a focused optical imaging system.
