OPTICAL SYSTEM
An optical system includes a fixed assembly, a movable part and a suspension module. The movable part is configured to be connected to an optical module, and the movable part is movable relative to the fixed assembly. The movable part is movable relative to the fixed assembly through the suspension module.
1 . An optical system, comprising:
a fixed assembly;
a movable part, configured to be connected to an optical module, wherein the movable part is movable relative to the fixed assembly; and
a suspension module, wherein the movable part is movable relative to the fixed assembly by the suspension module.
2 . The optical system as claimed in claim 1 , wherein
the suspension module includes a first suspension assembly and a second suspension assembly;
the movable part is movably connected to the fixed assembly via the first suspension assembly;
the first suspension assembly is configured to generate a first restoring force on the movable part;
the second suspension assembly is configured to generate a second restoring force on the movable part;
the suspension module is configured to generate a total force on the movable part; and
the total force includes the first restoring force and the second restoring force.
3 . The optical system as claimed in claim 2 , wherein
when the movable part is in a first position, the first restoring force is a first force;
when the movable part is in a second position, the first restoring force is a second force;
when the movable part is in a third position, the first restoring force is a third force;
the first position is between the second position and the third position;
when the movable part is located in the first position, the second restoring force is a fourth force;
when the movable part is located in the second position, the second restoring force is a fifth force;
when the movable part is located in the third position, the second restoring force is a sixth force;
an absolute value of the first force is greater than or equal to an absolute value of the fourth force;
an absolute value of the second force is greater than an absolute value of the fifth force; and
an absolute value of the third force is greater than an absolute value of the sixth force.
4 . The optical system as claimed in claim 3 , wherein
the absolute value of the second force is greater than the absolute value of the first force;
the absolute value of the third force is greater than the absolute value of the first force;
a direction of the second force is opposite to a direction of the third force;
the absolute value of the fifth force is greater than the absolute value of the fourth force;
the absolute value of the sixth force is greater than the absolute value of the fourth force; and
a direction of the fifth force is opposite to a direction of the sixth force.
5 . The optical system as claimed in claim 4 , wherein
the direction of the second force is opposite to the direction of the fifth force;
the absolute value of the fifth force is at least greater than half of the absolute value of the second force;
the direction of the third force is opposite to the direction of the sixth force; and
the absolute value of the sixth force is at least greater than half of the absolute value of the third force.
6 . The optical system as claimed in claim 5 , wherein
when the movable part is located in the first position, the total force is a seventh force;
when the movable part is located in the second position, the total force is an eighth force;
when the movable part is located in the third position, the total force is a ninth force;
an absolute value of the eighth force is greater than an absolute value of the seventh force;
an absolute value of the ninth force is greater than the absolute value of the seventh force; and
a direction of the eighth force is opposite to a direction of the ninth force.
7 . The optical system as claimed in claim 6 , wherein
the absolute value of the eighth force is less than the absolute value of the second force;
the direction of the eighth force is the same as the direction of the second force;
an absolute value of the ninth force is less than the absolute value of the third force; and
the direction of the ninth force is the same as the direction of the third force.
8 . The optical system as claimed in claim 7 , wherein
there is a first difference value between the second force and the third force;
there is a second difference value between the eighth force and the ninth force; and
the first difference value is greater than the second difference value.
9 . The optical system as claimed in claim 8 , wherein
a shortest distance is formed between the second position and the third position;
the first difference value and the shortest distance form a first slope;
the second difference value and the shortest distance form a second slope; and
the first slope is greater than the second slope.
10 . The optical system as claimed in claim 3 , wherein
the first suspension assembly includes a first elastic member and a second elastic member;
the first elastic member has a plate-shaped structure, and the first elastic member is connected to the movable part and the fixed assembly;
the optical module has an optical element, and the optical element defines an optical axis;
the first elastic member is parallel to the optical axis; and
the optical axis is perpendicular to a normal vector of the first elastic member.
11 . The optical system as claimed in claim 10 , wherein
the second elastic member has a plate-shaped structure, and the second elastic member is connected to the movable part and the fixed assembly; and
when viewed along the optical axis, the first elastic member is located on one side of the optical module, and the second elastic member is located on the other side of the optical module.
12 . The optical system as claimed in claim 11 , wherein
the second suspension assembly includes a first magnetic element and a second magnetic element;
the first magnetic element is located on the fixed assembly;
the second magnetic element is located on the movable part; and
the second magnetic element corresponds to the first magnetic element to generate at least part of the second restoring force.
13 . The optical system as claimed in claim 12 , wherein
the second suspension assembly further includes a third magnetic element and a fourth magnetic element;
the third magnetic element is located on the movable part;
the fourth magnetic element is located on the fixed assembly;
the fourth magnetic element corresponds to the third magnetic element to generate at least part of the second restoring force; and
the second magnetic element and the third magnetic element are located between the first magnetic element and the fourth magnetic element.
14 . The optical system as claimed in claim 13 , wherein
the optical system further includes a blocking assembly configured to limit the movable part to move within a range of motion;
when the movable part is located in any position within the range of motion, a gap between the first magnetic element and the second magnetic element is greater than 0; and
when the movable part is located in any position within the range of motion, a shortest distance between the first magnetic element and the second magnetic element is greater than 1 mm.
15 . The optical system as claimed in claim 14 , wherein
when the movable part is located in any position within the range of motion, a gap between the third magnetic element and the fourth magnetic element is greater than 0; and
when the movable part is located in any position within the range of motion, a shortest distance between the third magnetic element and the fourth magnetic element is greater than 1 mm.
16 . The optical system as claimed in claim 15 , wherein
the blocking assembly includes a first blocking portion and a second blocking portion;
the first blocking portion is located on the fixed assembly;
the second blocking portion is located on the movable part;
when the movable part is located in a first extreme position, the second blocking portion is configured to contact the first blocking portion so as to limit the movable part to be within the range of motion; and
the first magnetic element and the second magnetic element are respectively disposed in the first blocking portion and the second blocking portion.
17 . The optical system as claimed in claim 16 , wherein
the blocking assembly includes a third blocking portion and a fourth blocking portion;
the third blocking portion is located on the movable part;
the fourth blocking portion is located on the fixed assembly;
when the movable part is located in a second extreme position, the third blocking portion is configured to contact the fourth blocking portion to limit the movable part to be within the range of motion; and
the third magnetic element and the fourth magnetic element are respectively disposed in the third blocking portion and the fourth blocking portion.
18 . The optical system as claimed in claim 11 , wherein
the fixed assembly has a casing, a frame and a base;
the casing is fixedly connected to the base;
the frame is fixedly connected to the casing;
the first elastic member has a first inner connection portion and a first outer connection portion;
the first inner connection portion is fixedly connected to the movable part; and
the first outer connection portion is fixedly connected to the frame.
19 . The optical system as claimed in claim 18 , wherein
the optical system further includes an adjustment assembly configured to adjust the first suspension assembly of the suspension module;
the adjustment assembly includes a support connection member and an adjustment member;
the support connection member is disposed on the base;
the second elastic member is connected between the support connection member and the movable part;
the second elastic member has a second inner connection portion and a second outer connection portion;
the second inner connection portion is fixedly connected to the movable part; and
the second outer connection portion is fixedly connected to the support connection member.
20 . The optical system as claimed in claim 19 , wherein
when viewed in a direction perpendicular to the optical axis, the first inner connection portion does not overlap the second inner connection portion;
the adjustment member is movably disposed on the base; and
the adjustment member is configured to contact the support connection member and is configured to adjust a shortest distance between the second outer connection portion and the movable part.