Polarization splitting prism gluing process

Abstract

The invention discloses a polarization splitting prism gluing process, wherein the glued polarization splitting prism is subjected to milling, grinding, polishing, coating, and gluing processing in sequence; and the gluing processing relates to machine shaping a triangular prism which is qualified in size, angle, and appearance qualities and has matched PBS film characteristics and optical constants respectively according to the following steps: dispensing, glue discharging, adjusting of size-position of the glue, and ultraviolet curing. The glued prism prepared in the methodnot only has a small degree of separation of pixels at an edge of gluing regression passing through a light path, regarding to a 3D projection image, but also can greatly reduce the width and brightness of a dark zone generated at the edge of gluing regression on a white screen, so that overall color and luminosity of an image on the white screen cannot be obviously distinguished visually.

Description

technical field [0001] The invention belongs to the technical field of cold processing and manufacturing of optical parts, and in particular relates to a gluing method of a polarization beam splitting prism. Background technique [0002] At present, there is no public information about the gluing process technology of the polarization beam splitter prism in China. In foreign countries, we have seen products from other manufacturers at exhibitions. After the four prisms are glued together, a layer of black light-shielding material with a width of 1mm is coated on the incident surface of the prism. The 1mm-wide black coating, the position The manufacturing process is directly above the position of the ridge line after the apexes of the 3 pieces of triangular prisms are glued together. Its function is to reduce the pixel separation degree of the image frame produced by the light of the projector or projector passing through the prism at the glued ridge line. However, although...

AI Technical Summary

Problems solved by technology

However, although the parts manufactured by this gluing process have reduced the pixel separation degree of the picture produced at the gluing ridge of the prism by the image passing through the optical path to a certain extent, it has brought about the gluing ridge under the white screen. A wide and regular long dark band at the line, its brightness is obviously different from other places on the screen, which will affect the color uniformity of the light-colored picture

Images