| 摘要 |
A T.V. surveillance camera is disclosed. The camera comprises a lens (1), and electronic means (8, 9, 10) for deriving video signals (S) from images focused by the lens (1) onto image sensors (4, 6). Separating means (2) are provided to (a) separate essentially visible light (V) from the lens (1) and pass that light (V) to a first sensor (4), and (b) separate essentially infra-red light (IR) from the lens (1) and pass that light (IR) to an image intensifier (5) coupled to a second sensor (6). The image intensifier (5) is preferred to be a Gen 3 intensifier. Separation may be effected by means of a dichroic mirror (2) reflecting light below 700 nm and transmitting light above 700 nm, with a reflecting mirror (3) to correct the reversal of the dichroic mirror (2). |
