Abstract: The present invention relates to a stage lighting optical system including spot and beam effects simultaneously, comprising a light source assembly from which condensed light can be emitted, an object assembly, and a zoom lens assembly, which are located in a same primary optical axis direction. The light from said light source assembly is cast by the object assembly and the zoom lens assembly. Wherein, said object assembly include an object for beam mode assembly and an object for gobo mode assembly that can be switched with each other and enter to the primary optical axis. Said light source assembly can move forward or backward along the primary optical axis with respect to the object assembly. When the light source assembly moves forward to a first position with respect to the object assembly, the beam design assembly is switched to the primary optical axis.

Abstract: The present invention relates to a filter, a CMY color mixing assembly using the filter and an optical system thereof. Said filter comprises a substrate and a filtering film plated on the substrate, and the filtering film comprises a uniform region and a color mixing region. The thickness of the filtering film in the uniform region is uniform, while the thickness of the filtering film in the color mixing region is not uniform. The thickness of the filtering film in the uniform region is greater than or equal to the thickness of the filtering film in the color mixing region, and the thickness of the filtering film of a central region of the color mixing region is greater than the thickness of the filtering film of side regions of the color mixing region. Said color mixing region is provided at a side where the filter first accesses to a light path.

Abstract: An optical system of LED variable-focus imaging lamp, comprises a LED light source module, a light-collecting assembly, a shutter assembly and a zoom lens assembly, which are installed in sequence according to the direction of a light path. Geometry centers of the module and assemblies are collinear with a primary optic axis A. A focal point F1 of said light-collecting assembly coincides with a focal point F2 of the zoom lens assembly. Said zoom lens assembly comprises a first zoom lens, a diaphragm and a second zoom lens. Said first zoom lens and the second zoom lens can move forward or backward along the direction of the primary optic axis A so that zoom is realized. Said diaphragm is disposed between the first zoom lens and the second zoom lens, and the clear aperture of which is adjustable.