IMAGE FORMING APPARATUS AND COLORIMETRIC DEVICE

• Main Author: FURUKAWA HITOSHI
• Format: Patent
• Language: English; Japanese
• Published: 28.01.2016
• Subjects: CINEMATOGRAPHY; COLORIMETRY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHOTOGRAPHY; PHYSICS; RADIATION PYROMETRY; TESTING

PROBLEM TO BE SOLVED: To improve detection accuracy in colorimetry without increasing a colorimetric time.SOLUTION: There is provided an image forming apparatus including: a color sensor 50 having an LED 51, a diffraction grating 53, and a line sensor 54; an image forming part that forms an image on a sheet 21; a white reference plate 55 that is a reference in performing colorimetry of an image 69 to be measured formed on the sheet 21 by the image forming part; and a CPU 60 that performs colorimetry on the basis of a result of the detection of the image 69 to be measured and a result of the detection of the white reference plate 55 by the color sensor 50, where the CPU 60 of the color sensor 50 determines the intensity of light from the LED 51 with which the image 69 to be measured is irradiated to perform colorimetry on the basis of a result of the detection of an image-free area 68 of the sheet 21 and a result of the detection of the white reference plate 55 by the color sensor 50. 【課題】測色時間を増加させることなく、測色の検出精度を向上させること。【解決手段】ＬＥＤ５１と、回折格子５３と、ラインセンサ５４と、を有するカラーセンサ５０と、用紙２１に画像を形成する画像形成部と、画像形成部により用紙２１に形成された測色画像６９の測色を行う際の基準となる白基準板５５と、カラーセンサ５０により測色画像６９を検出した結果と白基準部材５５を検出した結果とに基づいて、測色を行うＣＰＵ６０と、を備える画像形成装置であって、カラーセンサ５０のＣＰＵ６０は、カラーセンサ５０により用紙２１の画像無し領域６８を検出した結果と白基準板５５を検出した結果とに基づいて、測色を行うために測色画像６９にＬＥＤ５１により照射する光の光量を決定する。【選択図】図３