Large exit pupil diameter fusion display night vision eyepiece

The invention belongs to the field of low-light night vision, and particularly relates to a large-exit-pupil-diameter fusion display night vision eyepiece, which sequentially comprises a position eyepiece diaphragm for human eye observation, a position eyepiece diaphragm for human eye observation and a position eyepiece diaphragm for display along a human eye observation direction, the first lens is provided with positive focal power, the second lens is provided with negative focal power, the third lens is provided with positive focal power, the light-emitting imaging surface I is arranged above the light-splitting cemented prism, and the first lens, the second lens and the third lens are convex surfaces in the human eye observation direction. And a concave surface is formed in the direction opposite to the human eye observation direction. Compared with the prior art, image superposition fusion display of the two displays can be realized, and the device has the characteristics of large exit pupil diameter, co