Transmitted-light-intensity measuring device, medium identifying device, medium conveying device, and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorMasaru Yamagishi
Life of this patent
Estimating the term…
Abstract
A device for measuring intensity of a transmitted light, includes a first measuring unit that measures a first intensity of a light transmitted through a medium on a conveying path in its thickness direction and outputs a first measured value; a second measuring unit that is arranged adjacent to the first measuring unit, measures a second intensity of the light transmitted through the medium in the thickness direction, and outputs a second measured value; and an operating unit that obtains a true measured value from the first measured value and the second measured value.
Claims16
A device for measuring intensity of a transmitted light, the device comprising:
- a first measuring unit that measures a first intensity of a light transmitted through a medium on a conveying path in its thickness direction and outputs a first measured value;
- a second measuring unit that is arranged adjacent to the first measuring unit, measures a second intensity of the light transmitted through the medium in the thickness direction, and outputs a second measured value;
- and
- an operating unit that obtains a true measured value from the first measured value and the second measured value, wherein
- the first measuring unit includes
- a first light-emitting unit that is arranged on a first side of the conveying path and emits a first light, and
- a first light-receiving unit that is arranged on a second side of the conveying path and receives the first light,
- the second measuring unit includes
- a second light-emitting unit that is arranged on the second side of the conveying path and emits a second light, and
- a second light-receiving unit that is arranged on the first side of the conveying path and receives the second light.
Dependencies are inferred from the claim text.