| 摘要 |
A vehicle (10) includes a night vision system with an infrared camera unit (12) that provides information to a display unit (16), which in turn projects an image onto the vehicle windshield (17). The camera unit (12) includes a lens system (26) which images infrared radiation from a scene (21) onto a detector (31) that contains a two-dimensional array of detector elements. The lens system images onto each detector element incoming energy that corresponds to a portion of the scene having a size within the range of approximately 0.8 to 3.5 milliradians. The camera unit provides a horizontal field of view which is less than approximately 14 DEG , while the lens system has an effective focal length which is less than approximately 2.25''. The night vision system is respectively capable and incapable of providing MRT recognition of a multi-bar target having a Nyquist spatial frequency that is respectively less than and greater than a selected frequency, the selected frequency being less than approximately 0.63. |
