Patent ID: 6473111
Filing Date: 2002-10-29
Classification: B41J,G02B

Abstract:
A rod lens array to be used for an optical printer having a resolution, said rod lens array comprising:a plurality of rod lenses arranged in an array having gaps; a substance filled in the gaps separating said plurality of rod lenses, said rod lenses having a conjugate length; and a pair of side panels sandwiching said plurality of rod lenses and said substance and having surfaces with a flatness; said rod lens array satisfying the requirement as defined by formula below; S<(Z/L)Â·(25.4/5P), â€ƒP being the resolution of said optical printer expressed in dpi, Z being the length of said rod lenses expressed in mm, L being the conjugate length of said rod lenses expressed in mm, S being the flatness of the surfaces of said side panels bearing the rod lenses.