Rayleigh criterion, based on wave optics, is imposed as a limit on the resolution of optical devices, but resolution beyond Rayleigh criterion has been reported. The current optical analysis and optical design is based on geometrical optics or wave optics. Hence we think that the resolution beyond Rayleigh criterion is owing to the limitations of the theoretical foundations. Also given to the need of analysis of crosstalk for some kinds of stereoscopic display, we applied path integral, instead of geometrical optics or physical optics, to the analysis of crosstalk. Crosstalk can be discussed in the form of probability amplitude and a constraint of time, not intensity of light. Meanwhile, various kinds of aberrations, being discussed as discrete entities now, may be integrated to be discussed under the frame of path integral. Finally, the distribution of crosstalk of this kind of stereoscopic display changes over time. Due to wave particle duality, we suggest that in this form, experiments should be designed to get a revised criterion, better than Rayleigh criterion, as a new limit on the resolution of optical devices.