METHOD OF MAKING SPHERICAL PROJECTION SCREEN Russian patent published in 2005 - IPC

FIELD: mechanical engineering.

SUBSTANCE: method concludes in locating and spacing of spherical surface to sections followed by subsequent mounting. Sections are located and spaced within preset sizes of screen in form of spherical surface reamer consisting of regular spherical pentagons and hexagons having stiffening rib along any face of a section. Length of chord between edge points of face of any section is chosen from relation of 1=2r cosΘ ; Θ=arctg 2cosβ/cosγ; γ=arcsin (sinα/sinβ); where r is radius of sphere, β=30°, α=54°. To make the screen of preset size the screen can be supplied with elements in form of truncated spherical penta- and/or hexagonal sections.

EFFECT: improved reliability; increased precision of making of spherical surface curvature.

2 cl, 2 dwg