| 摘要 |
A video camera 100 for remote operation or surveillance has a lens system 1 supported on a fixed base plate 26 and a pair of image sensors 14, 15, 204 mounted onto a movable plate 13. A pair of balls slides 11, 12 are attached to the fixed base plate 26 and the movable plate 13 to provide linear movement of the movable plate along a linear motion axis 50. An actuator 5 is disposed between the fixed base plate 26 and the movable plate 13 to move the movable plate 13 and each of the image sensors 14, 15, 204 along the linear motion axis 50 to dispose either the first image sensor 14 or the second image sensor 15 in and imagining position where the lens system 1 forms a scene image onto its active surface. In a preferred embodiment, the first image sensor 14 is an Electron Multiplication CCD array suitable for night time imaging and the second sensor 15 is a color CCD array suitable for day light imaging. The invention allows for multiple resolutions, multiple fields of view, multiple spectral bands or all three capabilities using a single lens system 1 without the efficiency losses in photon gathering and other shortcomings of other techniques commonly in use today.
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