Image forming apparatus

An image forming apparatus, comprising:

• a fixing member to fix an image on a recording medium moving in a first axis direction;
• at least one reflective optical sensor to emit light toward the fixing member and receive light reflected by the fixing member;
• a heat shield between the fixing member and the at least one reflective optical sensor, has a light passing part through which light directed to the fixing member from the at least one reflective optical sensor and light reflected by the fixing member and directed to the at least one reflective optical sensor passes, and prevents heat transfer from the fixing member to the at least one reflective optical sensor;
• a processor configured to obtain a surface state of the fixing member on the basis of an output signal from the at least one reflective optical sensor,
• an adjustment mechanism to adjust a position of the at least one reflective optical sensor in a second axis direction perpendicular to the first axis direction,
• wherein a position in the second axis direction of the light passing part of the heat shield is adjustable according to the position of the at least one reflective optical sensor.