The most important consideration in optical system design is the utilization rate of the light source's luminous flux. Specific performance indicators include light intensity, uniformity, saturation, and spot size. Two factors influence these indicators: the light source and the optical system structure and material selection. Domestic and international manufacturers and users generally recommend OSRAM or PHILIPS 1200W short-arc double-ended metal gas discharge lamps. Their characteristics include compactness, high brightness, high color temperature, good color rendering, and the ability to maintain a relatively stable color temperature during dimming. A disadvantage is the issue of filler layering within the lamp tube; that is, the filler may exhibit color banding or condensation in the arc tube, creating a shadow effect. This needs to be minimized during optical structure design. In optical structures, parabolic mirrors can be used to obtain a uniform mixed beam. For collecting divergent or narrow beams, mirrors with graduated or textured surfaces should be selected. Reflector systems made of specular reflective materials are better than refractive systems. When several beams need to be obtained from a single light source, a refractive system combining prisms or lenses can be used. Currently, the optical design of 1200W moving head lights, both domestically and internationally, employs lens combinations, typically composed of aspherical (i.e., parabolic) quartz lenses.
Đặc điểm quan trọng nhất của thấu kính parabol là đặt nguồn sáng điểm tại tiêu điểm của nó sẽ tạo ra chùm ánh sáng song song. Trong thiết kế đường quang, mối quan hệ giữa đường cong phân bố cường độ ánh sáng, hình dạng của thấu kính và kích thước của nguồn sáng, kích thước khẩu độ của thấu kính phản xạ và hình dạng của nguồn sáng cũng phải được xem xét.
