Glory Ltd.

Takaaki Morimoto

Akira Bogaki

Takahiro Yanagiuchi

Satoru Oshima

Naoki Tomigaki

Yuki Kiyose

Provided is an image sensor lighting unit including at least one light guide extending in a main scanning direction; a first light source group facing a first end surface of at least two end surfaces of the at least one light guide in the main scanning direction; and a second light source group facing a second end surface of the at least two end surfaces. The first light source group includes a first light source that emits light having a predetermined wavelength band. The second light source group includes a second light source that emits light having the wavelength band. An X-coordinate of the first light source in a corresponding XY-coordinate system is equal in absolute value to an X-coordinate of the second light source in a corresponding XY-coordinate system, with the at least one light guide viewed from the first end surface side in the main scanning direction.

Illumination device for image sensor

By overlapping lighting timings of light sources that emit lights of a plurality of different wavelength bands including a wavelength band of at least a visible light region and an infrared light region, the lights of the plurality of the different wavelength bands including the wavelength band of at least the visible light region and the infrared light region are emitted on a banknote while securing an overlap in timings thereof. Moreover, by using light receiving elements each including a bandpass filter that allows only light of a wavelength range that corresponds to the wavelength band of each of the light sources, received light intensities of the light of the wavelength range that corresponds to the wavelength band of each of the light sources are acquired simultaneously, and image data are formed based on the received light intensity of every acquired wavelength band.

Light receiving sensor, sensor module, and paper sheet handling apparatus

Light is emitted on one side of a paper sheet, which is being transported on a transport path, from a first light source, and light is emitted on other side of the paper sheetfrom a second light sourceand a fourth light source. A first light receiving sensorreceives a first reflected light, which is the light emitted by the first light sourceand reflected from the one side of the paper sheet. A second light receiving sensorreceives a second reflected light, which is the light emitted by the second light sourceand the fourth light sourceand reflected from the other side of the paper sheet, and receives a transmitted light that is the light emitted by the first light sourceand that has passed through the paper sheet. With this, satisfactory reflection image and transmission image of the paper sheet can be acquired while realizing the downsizing of the device.

Image acquisition device and image acquisition method

Light is emitted on one side of a paper sheet, which is being transported on a transport path, from a first light source, and light is emitted on other side of the paper sheetfrom a second light sourceand a fourth light source. A first light receiving sensorreceives a first reflected light, which is the light emitted by the first light sourceand reflected from the one side of the paper sheet. A second light receiving sensorreceives a second reflected light, which is the light emitted by the second light sourceand the fourth light sourceand reflected from the other side of the paper sheet, and receives a transmitted light that is the light emitted by the first light sourceand that has passed through the paper sheet.

To detect a fluorescent light and a phosphorescent light emitted from a paper sheet with a high precision, a fluorescence and phosphorescence detecting apparatus includes two sensor units. Each sensor unit includes a light source that emits an ultraviolet light on the paper sheet, an image sensor that captures images of the fluorescent light and the phosphorescent light excited on the paper sheet by irradiation of the ultraviolet light, and a light receiving lens that guides the fluorescent light and the phosphorescent light excited on the paper sheet to the image sensor. The two sensor units are arranged above and below the transport path and opposing each other across the transport path, and the light receiving lenses and the image sensors in the two sensor units are off-set along a transport direction of the paper sheet.

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Himeji, Japan

Takaaki Morimoto