Abstract: Projection apparatus comprising high resolution projection display systems that generate a relatively large high resolution image on a display screen, wherein seams and tiling artifacts in observation (image) space are eliminated or minimized. The projection apparatus comprises an image source that includes a plurality of small tiled image displays, relay optics, and a photoactivated reflective liquid crystal light valve. The small tiled or mosaic-like displays that provide source images that are displayed. The images projected by the image displays are imaged onto the light valve. A polarizing beamsplitter is disposed adjacent an output surface of the light valve, and an illumination source provides illumination light that is projected by way of the polarizing beamsplitter onto an output surface of the light valve. The illumination light is reflected from the output surface of the light valve back through the polarizing beamsplitter. A projection lens projects the illumination light onto the display screen.

Abstract: Fabric such as textile material is automatically inspected at high speed by diffraction of light techniques. The fabric is moved through a plane and irradiated with monochromatic light of given cross sectional area sufficient to encompass a large number of warp and fillings making up the fabric. The diffraction pattern developed after the beam has passed through the fabric is detected and various regions of this diffraction pattern are processed to provide data indicative of the quality of the fabric. The major regions involved in the diffraction pattern include the developed central lobe and first order side lobes along orthogonal axes normal to the directions of the warps and filling threads of the fabric.