Determination apparatus for determining type of recording medium and image forming apparatus using the same

An apparatus for determining a type of a recording medium, comprising:

• a detection unit including:
• a transmission unit configured to transmit ultrasonic waves toward the recording medium, and
• a reception unit configured to receive ultrasonic waves that were transmitted from the transmission unit and passed through the recording medium,
• the detection unit configured to detect a characteristic value indicating a physical characteristic of a recording medium;
• a measurement unit configured to measure information regarding a moisture content contained in the recording medium;
• and
• a control unit configured to determine the type of the recording medium based on the information measured by the measurement unit and the characteristic value detected by the detection unit.

An image forming apparatus comprising:

• an image forming unit configure to form an image;
• a detection unit including:
• a transmission unit configured to transmit ultrasonic waves toward the recording medium, and
• a reception unit configured to receive ultrasonic waves that were transmitted from the transmission unit and passed through the recording medium,
• the detection unit being configured to detect a characteristic value indicating a physical characteristic of a recording medium;
• a measurement unit configured to measure information regarding a moisture content contained in the recording medium;
• and
• a control unit configured to control an image forming condition of the image forming unit,
• wherein the control unit control the image forming condition of the image forming unit based on the information measured by the measurement unit and the characteristic value detected by the detection unit.