Illumination optical system for beam projector

A beam projector comprising an illumination optical system wherein the illumination optical system including:

• a single light source;
• a first prism which totally reflects light beams emanating from the single light source;
• a rotational wheel including circumferential regions coated with a plurality of fluorescent substances, which are excited by light beams incident from the single light source, for reflecting the light beams so as to produce a color different from a color of the light beams, and a region which reflects light beams incident from a prism so as to produce a color which is the same as the light beams, the region being formed by a plurality of conical or elliptical patterns that produce Lambertian reflection light;
• and
• a lens system which collects the light beams emanating from the single light source to the rotational wheel or collimates the light beams emanating from the rotational wheel,
• wherein the light beams emanating from the illumination optical system are incident on a display panel, and the light beams emanating from the display panel are projected to a screen through a projection lens system,
• and wherein a plurality of semi-elliptical patterns are randomly formed in the region which reflects light beams through sand blasting.

A beam projector comprising an illumination optical system, wherein the illumination optical system including:

• a single light source;
• first and second prisms which totally reflect light beams emanating from the single light source to change or correct an optical path thereof;
• a rotational wheel including circumferential regions coated with a plurality of fluorescent substances, which are excited by light beams incident from the single light source, for reflecting the light beams so as to produce a color different from a color of the light beams, and a region which reflects light beams incident from a prism so as to produce a color which is the same as the light beams;
• and
• a lens system which collects the lights emanating from the single light source to the rotational wheel or collimates the light beams emanating from the rotational wheel,
• wherein the light beams emanating from the illumination optical system are incident on a display panel and are uniformized by passing through a fly-eye lens and pass through a relay lens, a mirror, a condensing lens, and a second prism in sequence so that the uniformized light beams propagate to the display panel.