Lighting device with all parameters adjustable simultaneously, in particular for use as a stage light
First Claim
1. A lighting device comprising a wide light source adapted to produce a light beam, said light source having electrodes with an effective length greater than 6 mm, a reflective mirror disposed behind said light source, and in front of said light source, along the path of the light beam and spaced in succession from said light source toward an outlet end of the lighting device, an adjustable iris diaphragm, at least two optical lenses mounted for displacement along the path of the light beam relative to each other and arranged such that the image of the light source is focused on a forwardmost one of said two optical lenses, and a plurality of colored filters disposed in spaced relationship, each of said plurality of colored filters comprising a pair of films of colored transparent material mounted for movement into and out of the path of the light beam whereby the light beam exiting the lighting device defines a spot of homogeneous color and intensity which is gradually changeable in color by displacement of selective pairs of films of transparent material into and out of the path of the light beam.
1 Assignment
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Accused Products
Abstract
A lighting device comprises a light source adapted to produce a light beam. A reflective mirror is disposed behind the light source. The device also comprises a plurality of optical lenses and a plurality of colored filters. The light source comprises at least one filament and has at least one dimension greater than six millimeters in the direction in which the filament is disposed. The colored filters are movable and adapted to be inserted totally or partly into the path of the light beam. They are disposed on the opposite side of the plurality of optical lenses to the light source. An adjustable iris diaphragm is inserted between certain lenses of the plurality of lenses, on the path of the light beam.
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Citations
17 Claims
- 1. A lighting device comprising a wide light source adapted to produce a light beam, said light source having electrodes with an effective length greater than 6 mm, a reflective mirror disposed behind said light source, and in front of said light source, along the path of the light beam and spaced in succession from said light source toward an outlet end of the lighting device, an adjustable iris diaphragm, at least two optical lenses mounted for displacement along the path of the light beam relative to each other and arranged such that the image of the light source is focused on a forwardmost one of said two optical lenses, and a plurality of colored filters disposed in spaced relationship, each of said plurality of colored filters comprising a pair of films of colored transparent material mounted for movement into and out of the path of the light beam whereby the light beam exiting the lighting device defines a spot of homogeneous color and intensity which is gradually changeable in color by displacement of selective pairs of films of transparent material into and out of the path of the light beam.
Specification