Young’s double slit experiment is the mystery of the quantum mechanics (Feynman). To explore the mystery, the double slit experiments have been extended to cross double slit experiments.

cross double slit

L = 20

L = 50 mm

L = 130 mm

L = 250 mm

L = 1200 mm

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Exp. A.1

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Exp. A.2

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Exp. A.3

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Exp-A.4

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Exp. A.5

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Exp A.6

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In this article, we utilize the fact that each slit of the cross double slit (a double slit crossing a double slit) is divided into three segments by other two slits crossing, and experimentally show the function of each segment in producing both non-interference patterns (including Pre-Particle patterns, Particle patterns and Transition Patterns) and the Interference patterns by eliminate the segment and then, compare with the patterns of the standard cross double slit experiment. Although the non-interference patterns of different modified cross double slits are obviously different, the final interference patterns are surprisingly similar. This phenomenon needs a consistent theoretical interpretation, which would motivate the further development of optics. When applying the interference patterns of the cross double slit diaphragms, this phenomenon allows a tolerance on the defect of making the cross double slit diaphragm.