Image or picture projecting system using electronically controlled slides
Quasimonochromatic light source
Heat sinking means and method for projection television CRTs
Image display apparatus of liquid crystal valve projection type
Encapsulated liquid crystal and method
Infrared radiation filter lens for aircraft lights
ApplicationNo. 693366 filed on 04/30/1991
US Classes:362/294, With ventilating, cooling or heat insulating means353/54, Liquid coolant362/268, Plural serial lens elements or components362/293, Including selected wavelength modifier (e.g., filter)362/318Fluid medium type
ExaminersPrimary: Husar, Stephen F.
Attorney, Agent or Firm
International ClassF21V 029/00
AbstractA high intensity light projector for stage, architectural and similar applications includes a controllable image quality projection gate providing advanced visual effects. The projection gate, capable of selectively scattering or transmitting incident light, may be constructed of an array of scattering liquid crystal material in combination with infrared and ultraviolet reduction means which provide in the high intensity beam, a stable thermal environment by minimizing the absorption of light by the projection gate. Additional thermal efficiency is provided by supplemental cooling means. Color control is also provided in the form of dichroic filter wheels forming cooperating adjustable low, high and band width filters including saturation control. A color measuring feedback sensor is also provided. An intensity measuring feedback sensor controls a spatially-modulated, variable-density, reflectively-coated dimming wheel. A programmable gobo system has provisions for gobo selection, orientation, and rotation.