US 11,791,897 B2
Recording apparatus
So Yokota, Okaya (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Feb. 23, 2021, as Appl. No. 17/182,712.
Claims priority of application No. 2020-030183 (JP), filed on Feb. 26, 2020.
Prior Publication US 2021/0266067 A1, Aug. 26, 2021
Int. Cl. H04B 10/00 (2013.01); H04B 10/116 (2013.01); G02B 5/20 (2006.01); B41J 2/21 (2006.01); B41J 2/135 (2006.01)
CPC H04B 10/116 (2013.01) [B41J 2/135 (2013.01); B41J 2/21 (2013.01); G02B 5/20 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A recording apparatus, comprising:
a discharging head configured to discharge at least one type of color ink onto a medium; and
a detection unit configured to detect an optical density of a plurality of adjustment patterns formed by the discharging head on the medium; wherein
the detection unit includes
a light emitting unit configured to irradiate the medium with visible light,
a light receiving unit configured to receive reflected light from the medium, and
at least one filter disposed on an optical path on which the visible light emitted from the light emitting unit is reflected by the medium to be incident on the light receiving unit, and configured to attenuate an amount of the light, and
when a first absorption bandwidth is a wavelength range centered at a peak wavelength of an absorption wavelength of an absorption spectrum of a color of ink used to form the adjustment pattern and a first emission bandwidth is a wavelength range, corresponding to the first absorption bandwidth, of an emission spectrum of the visible light,
the at least one filter is configured to attenuate the visible light having a wavelength outside the first emission bandwidth.