Image forming apparatus and dirtiness detection method

摘要

A printer includes a printing section that ejects an ink, and a spectrometer that disperses incident light. The spectrometer includes a window section that transmits the light, an optical filter device, and a light receiving section. The optical filter device includes a variable wavelength interference filter as a dispersing element that disperses light transmitted by the window section. The light receiving section receives the light which is dispersed by the variable wavelength interference filter. A dirtiness of the window section is detected based on measured values corresponding to each of a plurality of wavelengths obtained by spectrally measuring light from a reference object, and reference values corresponding to each of the plurality of wavelengths.

主权项

1. An image forming apparatus, comprising:
an image forming device that ejects an ink; and a spectrometer that disperses incident light, wherein the spectrometer includes:
a window section that transmits the light,a dispersing element that disperses light transmitted by the window section, anda light receiving element that receives the light dispersed by the dispersing element and outputs detection signals indicative of measured values of a plurality of wavelengths, and wherein: residue on the window section is detected based on the measured values corresponding to each of the plurality of wavelengths obtained by spectrally measuring light from a reference object, and reference values corresponding to each of the plurality of wavelengths.