| 摘要 |
A working spotlight for illuminating a wide area, particularly for motor-vehicles, of a type with a light source arranged at a focal point of a first reflector wherein the first reflector has an approximately parabolic cross section (5) below an optical axis and a substantially non-corrective lens (16) covering the reflector to produce an uncomplicated and inexpensive spotlight which can have a relatively small volume but an efficient wide-area illumination output. The light source has a transverse linear filament (3) which extends horizontally and perpendicular to the optical axis while a horizontal cross section of the reflector through the optical axis forms a first approximately elliptical portion (4). First and second such reflectors are mounted together with vertical cross sections of the reflectors through the optical axes, above the optical axes forming a second approximately elliptical portion (6) in the first reflector with a spacing between focal points larger than that between focal points of the first approximately elliptical portion of the first reflector and a parabolic portion (12) in the second reflector. A third approximately elliptical portion (10) of the second reflector in horizontal cross section having a greater spacing between focal points than the first approximately elliptical portion (4) of the first reflector.
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