# US 11,440,840 B2 · Light irradiation device

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- Number: US 11,440,840 B2
- Document ID: US11440840B2
- Status: Granted
- Kind: B2
- Application number: 16/329,359
- Filed: 2017-08-31
- Published: 2019-08-15
- Granted: 2022-09-13
- Earliest claimed: 2016-09-02
- Assignees: Ushio Denki Kabushiki Kaisha
- Applicants: Ushio Denki Kabushiki Kaisha
- Inventors: Toshihiro Nakajima; Kazuhiko Shinoda
- Web page: https://patentgrep.com/patent/US11440840B2

## CPC

- C03C 25/106: Single coatings
- C03C 25/12: General methods of coating; Devices therefor
- F21V 7/09: with a combination of different curvatures
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

A light irradiation device includes a first reflective portion that is arranged at a concave inner surface formed so as to have a substantially arcuate shape and that permits wire-like member to be inserted into an interior thereof, at least one light-emitting portion that emits light in such fashion as to be directed toward the wire-like member from a direction which is circumferential with respect to the wire-like member, and a second reflective portion that is formed in planar fashion, at least a portion of the second reflective portion is arranged between an end of the first reflective portion and an end of the light-emitting portion in a direction circumferential with respect to the first reflective portion.

## Claims

### Claim 1

A light irradiation device comprising:
a first reflective portion that is arranged at a concave inner surface formed so as to have a substantially arcuate shape and that permits a wire-like member to be inserted into an interior thereof;
at least one light-emitting portion that emits light toward the wire-like member from a direction which is circumferential with respect to the wire-like member; and
a second reflective portion that is planar;
wherein at least a portion of the second reflective portion is arranged between an end of the first reflective portion and an end of the light-emitting portion in a direction circumferential with respect to the first reflective portion, and
wherein a reflective surface of the second reflective portion is arranged perpendicular to an optical axis of the light emitted from the light-emitting portion.

### Claim 2 (depends on 1)

The light irradiation device according to claim 1, wherein the second reflective portion is arranged such that an angle of intersection thereof with a radial direction of the first reflective portion is greater than 0° and less than 90°.

### Claim 3 (depends on 1)

The light irradiation device according to claim 1, comprising an insertion portion comprising an insertion passage formed at an interior thereof, the insertion passage permitting insertion of the wire-like member into the interior of the first reflective portion;
wherein the first reflective portion is arranged such that a center of curvature thereof is offset in eccentric fashion from a center of the insertion passage.

### Claim 4 (depends on 3)

The light irradiation device according to claim 3, wherein
the at least one light-emitting portion is a single one thereof; and
the center of curvature of the first reflective portion is offset in eccentric fashion, in a direction of an optical axis of the light emitted from the light-emitting portion, from the center of the insertion passage.

### Claim 5 (depends on 4)

The light irradiation device according to claim 4, wherein the center of curvature of the first reflective portion is offset in eccentric fashion, in a direction that causes it to be closer to the light-emitting portion, from the center of the insertion passage.

### Claim 6 (depends on 1)

The light irradiation device according to claim 1, wherein the second reflective portion is arranged toward the light-emitting portion from the center of curvature of the first reflective portion along the direction of the optical axis of the light emitted from the light-emitting portion.

### Claim 7 (depends on 1)

The light irradiation device according to claim 1, comprising a substrate that supports the at least one light-emitting portion;
wherein the at least one light-emitting portion is secured to a first surface of the substrate; and
the second reflective portion is formed at the first surface of the substrate.

### Claim 8 (depends on 7)

The light irradiation device according to claim 7, wherein
there are a plurality of the second reflective portions; and
two of the plurality of the second reflective portions straddle one of the at least one light-emitting portion.

### Claim 9 (depends on 1)

The light irradiation device according to claim 1, wherein the first reflective portion and the second reflective portion are integrally formed.

### Claim 10 (depends on 9)

The light irradiation device according to claim 9, wherein the end of the first reflective portion is contiguous with an end of the second reflective portion.

### Claim 11 (depends on 1)

The light irradiation device according to claim 1, comprising
an insertion unit having the first reflective portion; and
a light source unit having the at least one light-emitting portion and the second reflective portion;
wherein the light source unit is rotatably connected to the insertion unit.

### Claim 12 (depends on 11)

The light irradiation device according to claim 11, wherein
the insertion unit comprises a concavity having the first reflective portion at an inner surface thereof;
the concavity comprises an opening to one side in the direction circumferential with respect to the first reflective portion; and
the insertion unit comprises a light transmitting portion opening that covers the opening.

### Claim 13 (depends on 12)

The light irradiation device according to claim 12, wherein the at least one light-emitting portion is arranged to cause light to be emitted to pass through the light transmitting portion and directed toward the wire-like member.

### Claim 14 (depends on 1)

The light irradiation device according to claim 1, wherein the first reflective portion is a shape which is present in a space between a first circle and a second circle having centers at a same location, and a relationship between a diameter of the first circle and a diameter of the second circle satisfy the formula:
100%≤(the diameter of the second circle)/(the diameter of the first circle)≤110%;
wherein the diameter of the first circle the diameter of the second circle.

### Claim 15 (depends on 14)

The light irradiation device according to claim 14, wherein the first reflective portion is substantially arcuate such that the shape thereof is a portion of a circle.