Color correcting device for color printing light source

Claim 1

In a color correcting device for a printing light source in a color printer comprising light adjusting filters provided insertably in a light path of a light from said light source for adjusting the amount and the color temperature of the light from said light source so as to adapt the light from said light source for a printing exposing light, and exposing filters for determining an exposure amount of said printing exposing light on a negative film, an improvement comprises light receiving means arranged to receive a part of the printing light leading to a printing paper from the light source, driving means respectively connected to the light adjusting filters to insert said light adjusting filters into said light path, and servo-systems including therein said light receiving means and said driving means, the amounts of insertion of said light adjusting filters into said light path being adjusted through said servo-systems by comparing values obtained through said light receiving means by receiving said printing exposure light before passing through said negative film under the state in which said exposing filters are retracted out of the light path, with values obtained through said light receiving means by receiving said printing exposure light passed through a standard negative film set in the light path.