Abstract: An optical engine includes adjustable optics that provide rapid and accurate alignment to imagers. The adjustable optics include a light pipe translatable along a first direction, (2) a focusing lens translatable along second and third directions, (3) a turning mirror translatable along the first, the second, and the third directions, and rotatable about the first and the second directions, and (4) an adjustable dichroic mirror rotatable about the third direction. The light pipe homogenizes light from a light source, the focusing lens focuses the homogenized light, a fixed dichroic mirror passes a first color light and reflects second and third color lights from the focused light, the turning mirror turns the second and the third color lights, and the adjustable dichroic mirror passes the second color light and reflects the third color light. The imagers reflect the color lights to form color images that combine to form a projected image.