Patent ID: 6069741
Filing Date: 2000-05-30
Classification: B41J,G02B,H04N

Abstract:
An optical device comprising:an input aperture array formed with a plurality of input apertures at a preselected period of arrangement;an output aperture array formed with a plurality of output apertures respectively facing said plurality of input apertures at a preselected period of arrangement; andan aperture array intervening between said input aperture array and said output aperture array and formed with apertures respectively facing said plurality of input apertures and said plurality of output apertures at a preselected period of arrangement;said aperture array satisfying the following conditions:t2>T.multidot.(r+R)/(P+r-.rho.)t1<t2.multidot.(P-.rho.-r)/(P+.rho.-r)where T denotes a distance between said input aperture array and said output aperture array, r denotes a half-width of said input apertures, .rho. denotes a half-width of said output apertures, R denotes a half-width of said apertures, t1 denotes a distance between said input aperture array and an input surface of said aperture array, and t2 denotes a distance between said input aperture array and an output surface of said aperture array.