| 摘要 |
Apparatus for improving the resolution and/or field of view of an optical system without degrading the signal-to-noise ratio. An optical image of the object (1) in an image plane (8) is divided into n subimages, where n is any positive integer. Each of the n subimages is separately refocused (by 10, 20, 30) and detected (by 11, 21, 31). The optical system can be a staring or a scanning system, and can operate at any wavelength. When the number of subimages is two, an image bisector (7) is used. The bisector (7) comprises first and second highly reflective planar surfaces (12, 22). A knife edge (2), formed by the intersection of the reflective surfaces (12, 22), lies in the image plane (8). In the more general case, n-1 reflective surfaces are used, each having a knife edge lying in the image plane (8).
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