Heads up display for night vision goggle.

摘要

Conventional night vision goggles are, according to the invention, provided with heads up display information at the same focus and in the same field of view as the intensified image. The heads up display information is typically generated by a remotely located cathode ray tube and transferred to the goggles (10) by a fiber optic cable (35). This information is introduced from a beam expander or taper (37) into one of the eyepieces (20), which eyepiece is modified to include an image combiner (45) placed inside its outer lens (52) in order to provide substantially the same eye relief and physical dimensions as an unmodified eyepiece. The image combiner includes a partially reflective mirror (46). Additional lenses (41, 42, 43) are provided between the heads up display from the beam expander (37), and the beam combiner (45), to ensure that this additional information is presented to the eye at the same focus as the intensified image.