| 摘要 |
The apparatus contained in a single housing (1) comprises a first movable input reflector (4) and a second input reflector (5) for causing the input light beams to deviate along the optical axis (11) of the night path and optical axis (7) of the day path, respectively. The night path is constituted by an objective (12), a light intensifier tube (13) and a bent ocular (14) and the day path is constituted by an optical system having a second output reflector (9). The optical axes of the night path and of the day path extend in a sagittal plane (7, 11) of the carrying vehicle; on the other hand, the first input reflector and the second output reflector are alternately concealable by manipulation of the second output reflector. For viewing by night the first input reflector in the active position is situated before the second input reflector, the second output reflector being in the concealed position. For viewing by day the second output reflector in the active position is situated behind the bent ocular, the first input reflector being in the concealed position.
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