Optical system
An optical system is provided in the present disclosure, including a fixed portion and a movable portion. The movable portion is movable relative to the fixed portion. The movable portion includes an optical adjustment assembly and a first optical element. The optical adjustment assembly has a frame and an optical axis. The first optical element has a first housing, which is connected to the frame of the optical adjustment assembly. The first optical element and the optical adjustment assembly are arranged along the optical axis.
1 . An optical system, comprising:
a fixed portion; and
a movable portion, movable relative to the fixed portion, including:
an optical adjustment assembly, having a frame and an optical axis; and
a first optical element, having a first housing connected to the frame of the optical adjustment assembly, wherein the first optical element and the optical adjustment assembly are arranged along the optical axis;
wherein the frame comprises:
a first body having a first material; and
a first connecting portion having a second material, wherein the first material and the second material are different;
wherein the first body and the first connecting portion are formed integrally by using double-injection molding technology;
wherein the optical system further comprises an adhesive element, wherein there is a gap between the first housing and the first connecting portion, and the adhesive element is disposed inside the gap, so that the first housing is fixedly connected to the first connecting portion;
wherein the adhesive element has a fourth material, wherein the coefficient of thermal expansion of the fourth material is similar to the coefficient of thermal expansion of the second material.
2 . The optical system as claimed in claim 1 , wherein the coefficient of thermal expansion of the first material and the coefficient of thermal expansion of the second material are different.
3 . The optical system as claimed in claim 1 , wherein the first body, the first connecting portion and the first housing of the first optical element at least partially overlap when viewed in a direction that is perpendicular to the optical axis.
4 . The optical system as claimed in claim 1 , wherein the first housing has a third material, wherein the third material is similar to the second material.
5 . The optical system as claimed in claim 4 , wherein the coefficient of thermal expansion of the third material is similar to the coefficient of thermal expansion of the second material.
6 . The optical system as claimed in claim 1 , wherein the first material includes plastic material and the second material includes plastic material.
7 . The optical system as claimed in claim 1 , wherein the first material includes plastic material and the second material includes metal material.
8 . The optical system as claimed in claim 7 , wherein the coefficient of thermal expansion of the metal material included in the second material is close to zero.
9 . The optical system as claimed in claim 1 , wherein the movable portion further comprises:
a second optical element, having a second housing; and
a holder, connected to the second housing.
10 . The optical system as claimed in claim 9 , wherein the holder comprises:
a second body having a fifth material; and
a second connecting portion having a sixth material, wherein the fifth material and the sixth material are different.
11 . The optical system as claimed in claim 10 , wherein the coefficient of thermal expansion of the fifth material and the coefficient of thermal expansion of the sixth material are different.
12 . The optical system as claimed in claim 10 , wherein the second housing has a seventh material, wherein the seventh material is similar to the sixth material.
13 . The optical system as claimed in claim 12 , wherein the coefficient of thermal expansion of the seventh material is similar to the coefficient of thermal expansion of the sixth material.
14 . The optical system as claimed in claim 12 , wherein the sixth material is similar to the second material.
15 . The optical system as claimed in claim 14 , wherein the coefficient of thermal expansion of the sixth material is similar to the coefficient of thermal expansion of the second material.
16 . The optical system as claimed in claim 10 , wherein the fifth material includes plastic material and the sixth material includes metal material.
17 . The optical system as claimed in claim 16 , wherein the coefficient of thermal expansion of the metal material included in the sixth material is close to zero.
18 . The optical system as claimed in claim 1 , wherein the movable portion is connected to a driving assembly that drives the movable portion to move relative to the fixed portion;
wherein the driving assembly has the same material as the second material formed where it is connected to the movable portion.
19 . The optical system as claimed in claim 18 , wherein the driving assembly is formed by using double-injection molding technology.