| 摘要 |
A zoom objective 30 has a common imaging path or axis 2, an optical zoom group 4 displaceable along the imaging path 2, and a beam splitter element 10 to separate the common beam path 2 into first and second paths along first and second optical axes (11 & 12, fig 1) one inclined relative to the other. First and second optical imaging groups 13 & 15 along the first and second optical axes respectively, form object images on first and second detectors 14 & 16. The zoom objective may have an optical phase analyser, may be formed with an aperture array or a micro lens array, and may be a Shack-Hartmann sensor. If a phase deformation of the wave front is observed by means of the second detector, this allows a calculated reduction of fuzziness or image deformations in the image content of the first detector caused by temperature or density fluctuations in the atmosphere. |
