Patent ID: 6249092
Filing Date: 2001-06-19
Classification: F21V,F21W

Abstract:
A lighting apparatus comprising:a housing accommodating a removable discharge lamp;a first shutter mechanism positioned on an optical path of said discharge lamp in front of said discharge lamp for mechanically opening or closing said optical path to thereby adjust a size of the optical path of light issuing from said discharge lamp;a lens for converging the light passed through said first shutter mechanism;a second shutter mechanism positioned on said optical path for physically opening or closing an optical path on which the light converged by said lens is propagated to thereby dim said light;a casing accommodating said housing, said first shutter mechanism, said second shutter mechanism and said lens;a power supply section for feeding power to said discharge lamp; anda control means operative in response to a control signal for controlling said power supply section to thereby set up or interrupt power feed from said power supply section to said discharge lamp, and controlling at least one said first shutter mechanism and said second shutter mechanism to thereby dim the light.