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US-20260126321-A1 - DETECTION DEVICE

US20260126321A1US 20260126321 A1US20260126321 A1US 20260126321A1US-20260126321-A1

Abstract

According to an aspect, a detection device includes: a light source device including point light sources; a light-transmitting placement substrate on which an object to be detected is placed; an optical filter that is located so as to overlap one side in the first direction of the placement substrate and has divided areas divided in a second direction; an optical sensor that is located so as to overlap one side in the first direction of the optical filter and includes photodetection elements arranged in a planar configuration. A first point light source of the point light sources overlaps a first divided area of the divided areas of the optical filter as viewed from the first direction. A first emitted light waveband of emitted light emitted from the first point light source overlaps a first transmitted light waveband of transmitted light transmitted through the first divided area.

Inventors

  • Shinya Asakura

Assignees

  • MAGNOLIA WHITE CORPORATION

Dates

Publication Date
20260507
Application Date
20251218
Priority Date
20230620

Claims (5)

  1. 1 . A detection device comprising: a light source device comprising a plurality of point light sources arranged in a planar configuration; a light-transmitting placement substrate that is located so as to overlap one side in a first direction of the light source device, and on which an object to be detected is placed; an optical filter that is located so as to overlap one side in the first direction of the placement substrate and has a plurality of divided areas divided in a second direction intersecting the first direction; an optical sensor that is located so as to overlap one side in the first direction of the optical filter and comprises a plurality of photodetection elements arranged in a planar configuration, wherein a first point light source of the point light sources overlaps a first divided area of the divided areas of the optical filter as viewed from the first direction, and a first emitted light waveband of emitted light emitted from the first point light source overlaps a first transmitted light waveband of transmitted light transmitted through the first divided area.
  2. 2 . The detection device according to claim 1 , wherein a second point light source of the point light sources is adjacent to the first point light source in the second direction, a second divided area of the divided areas of the optical filter is adjacent to the first divided area in the second direction, the second point light source overlaps the second divided area as viewed from the first direction, a second emitted light waveband of emitted light emitted from the second point light source overlaps a second transmitted light waveband of transmitted light transmitted through the second divided area, the first emitted light waveband does not overlap the second emitted light waveband, and the first transmitted light waveband does not overlap the second transmitted light waveband.
  3. 3 . The detection device according to claim 2 , wherein the light source device comprises a side wall that extends in the first direction and separates the point light sources from one another, and the side wall has visible light absorbability to absorb at least part of visible light.
  4. 4 . The detection device according to claim 2 , wherein the divided areas are arranged in a grid pattern as viewed from the first direction, the emitted light emitted from the point light sources has four or more different wavebands, and the transmitted light transmitted through the divided areas of the optical filter has four or more different wavebands.
  5. 5 . The detection device according to claim 3 , wherein the divided areas are arranged in a grid pattern as viewed from the first direction, the emitted light emitted from the point light sources has four or more different wavebands, and the transmitted light transmitted through the divided areas of the optical filter has four or more different wavebands.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the benefit of priority from Japanese Patent Application No. 2023-101112 filed on Jun. 20, 2023 and International Patent Application No. PCT/JP2024/018365 filed on May 17, 2024, the entire contents of which are incorporated herein by reference. BACKGROUND 1. Technical Field What is disclosed herein relates to a detection device. 2. Description of the Related Art Japanese Patent Application Laid-open Publication No. 2018-033430 (JP-A-2018-033430) discloses a biosensor that includes an optical sensor including a photosensor (photodetection element), a culture vessel placed on the upper side of an imaging surface of the photosensor, and a point light source disposed above the culture vessel. In the biosensor of JP-A-2018-033430, light emitted from the point light source passes through a culture medium and a plurality of objects to be detected (microorganisms) in the culture vessel, and enters the photosensor. In such a detection device, when a plurality of the point light sources are arranged, one object to be detected is irradiated with the light from the point light sources in respective different directions, potentially resulting in blurring of an image captured by the optical sensor. For the foregoing reasons, there is a need for a detection device capable of improving accuracy of detection. SUMMARY According to an aspect, a detection device includes: a light source device including a plurality of point light sources arranged in a planar configuration; a light-transmitting placement substrate that is located so as to overlap one side in a first direction of the light source device, and on which an object to be detected is placed; an optical filter that is located so as to overlap one side in the first direction of the placement substrate and has a plurality of divided areas divided in a second direction intersecting the first direction; an optical sensor that is located so as to overlap one side in the first direction of the optical filter and includes a plurality of photodetection elements arranged in a planar configuration. A first point light source of the point light sources overlaps a first divided area of the divided areas of the optical filter as viewed from the first direction. A first emitted light waveband of emitted light emitted from the first point light source overlaps a first transmitted light waveband of transmitted light transmitted through the first divided area. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically illustrating a detection device according to a first embodiment of the present disclosure; FIG. 2 is a perspective view illustrating a state in which a top panel has been removed from FIG. 1; FIG. 3 is a schematic view of the detection device according to the first embodiment; FIG. 4 is a block diagram illustrating a configuration example of the detection device; FIG. 5 is a schematic view illustrating projection areas of emitted light from point light sources; FIG. 6 is a schematic view of the detection device according to the first embodiment; FIG. 7 is a schematic plan view of a light source device according to the first embodiment; FIG. 8 is a schematic plan view of an optical filter according to the first embodiment; FIG. 9 is a schematic diagram illustrating wavebands of the emitted light and transmitted light; FIG. 10 is a schematic view illustrating a detection device according to a second embodiment of the present disclosure; FIG. 11 is a schematic plan view of the optical filter according to the second embodiment; and FIG. 12 is a schematic plan view of the light source device according to the second embodiment. DETAILED DESCRIPTION The following describes modes (embodiments) for carrying out the present disclosure in detail with reference to the drawings. The present disclosure is not limited to the description of the embodiments given below. Components described below include those that are easily conceivable by those skilled in the art or those that are substantially identical thereto. In addition, the components described below can be combined as appropriate. What is disclosed herein is merely an example, and the present disclosure naturally encompasses appropriate modifications easily conceivable by those skilled in the art while maintaining the gist of the present disclosure. To further clarify the description, the drawings may schematically illustrate, for example, widths, thicknesses, and shapes of various parts as compared with actual aspects thereof. However, they are merely examples, and interpretation of the present disclosure is not limited thereto. The same component as that described with reference to an already mentioned drawing is denoted by the same reference numeral through the present disclosure and the drawings, and detailed description thereof may not be repeated where appropriate. In XYZ coordinates in the drawings, a Z direction (first direction) corresponds