Image forming apparatus having density detecting means

An image forming apparatus comprising:

• an image bearing member;
• a transfer material bearing member for bearing and conveying a transfer material thereon,
• wherein an image on said image bearing member is transferred to the transfer material on said transfer material bearing member;
• and
• density detecting means for detecting a density of an image for density detection formed on said transfer material bearing member,
• wherein an image forming condition is controlled on the basis of an output from said density detecting means,
• wherein said density detecting means has regular reflection type density detecting means for detecting the density by regular reflection light from a portion to be detected, and diffuse reflection type density detecting means for detecting the density by diffuse reflection light from the portion to be detected, and
• wherein an output value from said diffuse reflection type density detecting means is corrected on the basis of an output value from said regular reflection type density detecting means which has detected a reference image and an output value from said diffuse reflection type density detecting means which has detected said reference image.

An image forming apparatus comprising:

• an image bearing member;
• and
• density detecting means for detecting a density of an image for density detection formed on said image bearing member,
• wherein an image forming condition is controlled on the basis of an output from said density detecting means,
• wherein said density detecting means has regular reflection type density detecting means for detecting the density by regular reflection light from a portion to be detected, and diffuse reflection type density detecting means for detecting the density by diffuse reflection light from the portion to be detected, and
• wherein an output value from said diffuse reflection type density detecting means is corrected on the basis of an output value from said regular reflection type density detecting means which has detected a reference image an output value from said diffuse reflection type density detecting means which has detected said reference image and an output value obtained by detecting a surface of said image bearing member by said diffuse reflection type density detecting means.

An image forming apparatus comprising:

• an image bearing member;
• a transfer material bearing member for bearing and conveying a transfer material thereon,
• wherein an image on said image bearing member is transferred to the transfer material on said transfer material bearing member;
• and
• density detecting means for detecting a density of an image for density detection formed on said transfer material bearing member,
• wherein an image forming condition is controlled on the basis of an output from said density detecting means,
• wherein said density detecting means has regular reflection type density detecting means for detecting the density by regular reflection light from a portion to be detected, and diffuse reflection type density detecting means for detecting the density by diffuse reflection light from the portion to be detected,
• wherein an output value from said diffuse reflection type density detecting means is corrected on the basis of an output value from said regular reflection type density detecting means which has detected a reference image, an output value from said diffuse reflection type density detecting means which has detected said reference image and an output value obtained by detecting a surface of said transfer material bearing member by said diffuse reflection type density detecting means.