Antireflection member and orienter apparatus having a third plate part with a second notch part and an antireflection surface

1. An antireflection member comprising:

a first plate part that has a first end and a second end, the second end being arranged at a side opposite to the first end;

a second plate part that extends from a vicinity of the first end, a first notch part being arranged on the second plate part, the second plate part having an antireflection surface; and

a third plate part that extends from a vicinity of the second end to be opposed to the second plate part, a second notch part being arranged at a position corresponding to the first notch part on the third plate part, the third plate part having an antireflection surface directed to the antireflection surface of the second plate part.

2. The antireflection member according to claim 1 , wherein

the first plate part has an antireflection surface directed to the second plate part and the third plate part.

3. The antireflection member according to claim 1 , wherein

the antireflection surface of the second plate part and the antireflection surface of the third plate part respectively include at least one of a surface treated with alumite, a surface plated with nickel for blackening, and a surface applied with black paint.

4. The antireflection member according to claim 3 , wherein

the black paint includes black carbon as a main component.

5. The antireflection member according to claim 2 , wherein

the antireflection surface of the first plate includes at least one of a surface treated with alumite, a surface plated with nickel for blackening, and a surface applied with black paint.

6. The antireflection member according to claim 5 , wherein

the black paint includes black carbon as a main component.

7. The antireflection member according to claim 1 , wherein

the first notch part extends from an end of the second plate part at a side opposite to the first plate part to approach the first plate part, and

the second notch part extends from an end of the third plate part at a side opposite to the first plate part to approach the first plate part.

8. The antireflection member according to claim 1 , wherein

the first notch part is arranged closer to the third plate part than a first principal part of the second plate part, and

the second plate part further has a first inclined part that is inclined in a direction from the first principal part toward the third plate part and extends to the first notch part.

9. The antireflection member according to claim 1 , wherein

the second notch part is arranged closer to the second plate part than a second principal part of the third plate part, and

the third plate part further has a second inclined part that is inclined in a direction from the second principal part toward the second plate part and extends to the second notch part.

10. The antireflection member according to claim 9 , wherein

the third plate part further has a folded-back part that is folded back at an end of the second inclined part at a side of the second notch part toward a side opposite to the second plate part.

11. The antireflection member according to claim 1 , wherein

the first plate part further includes

a third end that is arranged between the first end and the second end and

a fourth end that is arranged between the first end and the second end at a side opposite to the third end, and

the member further comprises

a fourth plate part that extends from the third end to a side opposite to the second plate part and the third plate part, a screw hole being arranged on the fourth plate part, and

a fifth plate part that extends from the fourth end to the side opposite to the second plate part and the third plate part, a screw hole being arranged on the fifth plate part.

12. An orienter apparatus comprising:

an apparatus body;

a light-emitting element that is fixed to the apparatus body;

a light-receiving element that is fixed at a position opposed to the light-emitting element in the apparatus body;

a supporting mechanism that supports a substrate rotatably while an end of the substrate is positioned between the light-emitting element and the light-receiving element; and

an antireflection member that is arranged in a region including a vicinity of the light-emitting element and a vicinity of the light-receiving element in the apparatus body, the antireflection member including a first plate part, a second plate part, a third plate part, the first plate part having a first end and a second end, the second end being arranged at a side opposite to the first end, the second plate part extending from a vicinity of the first end, a first notch part being arranged on the second plate part to correspond to the light-receiving element, the second plate part having an antireflection surface, the third plate part extending from a vicinity of the second end to be opposed to the second plate part, a second notch part being arranged on the third plate part to correspond to the light-emitting element, the third plate part having an antireflection surface directed to the antireflection surface of the second plate part.

13. The orienter apparatus according to claim 12 , further comprising a controller that obtains an outer peripheral position of a notch of the substrate based on a quantity of light emitted by the light-emitting element and received by the light-receiving element while the supporting mechanism is rotating with the substrate.

14. The orienter apparatus according to claim 12 , wherein

the antireflection member is configured to be attachable to and detachable from the apparatus body.

15. The orienter apparatus according to claim 14 , wherein

the apparatus body and the antireflection member are configured to be fixed to each other via a screw by using a screw hole provided on the apparatus body and a screw hole provided on the antireflection member.

16. The orienter apparatus according to claim 12 , wherein

the third plate part of the antireflection member is arranged in the vicinity of the light-emitting element in the apparatus body,

the second plate part of the antireflection member is arranged in the vicinity of the light-receiving element in the apparatus body, and

the first plate part of the antireflection member has an antireflection surface directed to the light-emitting element and the light-receiving element.

17. The orienter apparatus according to claim 12 , wherein

the antireflection surface of the second plate part and the antireflection surface of the third plate part in the antireflection member respectively include at least one of a surface treated with alumite, a surface plated with nickel for blackening, and a surface applied with black paint.

18. The orienter apparatus according to claim 16 , wherein

the antireflection surface of the first plate in the antireflection member includes at least one of a surface treated with alumite, a surface plated with nickel for blackening, and a surface applied with black paint.

19. The orienter apparatus according to claim 12 , wherein

the apparatus body includes

a first part,

a second part that extends from a first region in the first part, and

a third part that extends from a second region located lower than the first region in the first part to be opposed to the second part,

the light-receiving element is arranged on a lower surface of the second part, and

the light-emitting element is arranged on an upper surface of the third part.

20. The orienter apparatus according to claim 19 , wherein

the first plate part of the antireflection member is arranged in a vicinity of a third region between the first region and the second region in the first part of the apparatus body,

the second plate part of the antireflection member is arranged in a vicinity of the light-receiving element on the lower surface of the second part of the apparatus body, and

the third plate part of the antireflection member is arranged in a vicinity of the light-emitting element on the upper surface of the third part of the apparatus body.