Light amount adjustment device, imaging device, imaging system and moving object
AssigneeSz Dji Technology Co., Ltd.
InventorsLongji Bai, Takashi Koyama, Yongwang Xu
Life of this patent
Estimating the term…
Abstract
A light amount adjustment device includes a base member, a rotation member rotatably held with respect to the base member, and a light amount adjustment member engaged with the rotation member and configured to be driven by the rotation member to adjust an amount of passing light. The rotation member includes a first surface area in contact with the base member and a second surface area not in contact with the base member. A surface roughness of the first surface area is greater than a surface roughness of the second surface area.
Claims11
A light amount adjustment device, comprising:
- a base member;
- a rotation member rotatably held with respect to the base member, the rotation member including a first surface area in contact with the base member and a second surface area not in contact with the base member, and a surface roughness of the first surface area being greater than a surface roughness of the second surface area;
- and
- a light amount adjustment member engaged with the rotation member and configured to be driven by the rotation member to adjust an amount of passing light, wherein:
- the rotation member includes:
- a main body portion;
- a gear portion provided at the main body portion and configured to engage with a driving source;
- and
- a weight portion provided at the main body portion;
- and
- a position of a center of gravity of a combination of the main body portion, the gear portion, and the weight portion is closer to a rotation shaft of the rotation member than a position of a center of gravity of a combination of the main body portion and the gear portion.
A light amount adjustment device of, comprising:
- a base member;
- a rotation member rotatably held with respect to the base member, the rotation member including a first surface area in contact with the base member and a second surface area not in contact with the base member, and a surface roughness of the first surface area being greater than a surface roughness of the second surface area;
- a light amount adjustment member engaged with the rotation member and configured to be driven by the rotation member to adjust an amount of passing light;
- and
- an elastic member configured to energize the rotation member, wherein:
- the base member includes a recessed portion that rotatably accommodates the rotation member;
- and
- the elastic member is provided between a side wall of the recessed portion and a side surface of the rotation member that faces the side wall of the recessed portion.
Dependencies are inferred from the claim text.