Optical system

1 . An optical system, comprising:

an image source assembly used for providing light and comprising an image source, a first light path adjusting element, a collimator, and a first driving assembly;

a light-guiding element used for transmitting the light;

a first optical element disposed between the image source assembly and the light-guiding element and used for adjusting a path of the light; and

a light path adjusting assembly disposed between the image source and the light-guiding element and used for changing the path of the light, and the light path adjusting assembly comprises a second light path adjusting element, a third light path adjusting element, a second driving assembly, and a third driving assembly;

wherein:

the image source is used for providing the light;

the image source, the first light path adjusting element, and the collimator are arranged in a first direction;

the first driving assembly is disposed on the first light path adjusting element and used for driving the first light path adjusting element moving relative to the collimator in the first direction;

the collimator is used for adjusting a direction of the light to the first direction;

the second driving assembly is disposed on the second light path adjusting element; and

the third driving assembly is disposed on the third light path adjusting element.

2 . The optical system as claimed in claim 1 , wherein:

the second driving assembly is used for driving the second light path adjusting element to rotate around a first rotational axis;

the third driving assembly is used for driving the third light path adjusting element to rotate around a second rotational axis; and

the first rotational axis and the second rotational axis are different.

3 . The optical system as claimed in claim 2 , wherein:

the second light path adjusting element and the third light path adjusting element are arranged in a second direction; and

the first direction and the second direction are different.

4 . The optical system as claimed in claim 3 , wherein:

the collimator and the second light path adjusting element are arranged in the first direction;

the third light path adjusting element and the first optical element are arranged in a third direction; and

the second direction and the third direction are different.

5 . The optical system as claimed in claim 4 , wherein:

the second light path adjusting element receives the light from the collimator;

the second light path adjusting element adjusts the direction of the light from the first direction to a fourth direction; and

the fourth direction is different from the first direction.

6 . The optical system as claimed in claim 5 , wherein:

the third light path adjusting element receives the light from the second light path adjusting element;

the third light path adjusting element adjusts the direction of the light from the fourth direction to a fifth direction; and

the fourth direction and the fifth direction are different.

7 . The optical system as claimed in claim 6 , wherein:

the first optical element comprises a first optical element surface facing the light path adjusting assembly;

a plurality of microstructures are formed on the first optical element surface;

the first optical element is in direct contact with the light-guiding element;

the light-guiding element comprises a first light-guiding element surface and a second light-guiding element surface;

the first light-guiding element surface and the second light-guiding element surface are opposite each other;

the first light-guiding element surface faces the first optical element; and

the first optical element surface faces away from the first light-guiding element surface.

8 . The optical system as claimed in claim 7 , wherein a ratio between a height of the microstructures and a height of the first optical element is less than 0.01.

9 . The optical system as claimed in claim 8 , further comprising a second optical element and a fourth driving assembly;

wherein:

the second optical element is disposed on the first light-guiding element surface;

the second optical element comprises a second optical element surface facing away from the light-guiding element; and

a plurality of microstructures are formed on the second optical element surface.

10 . The optical system as claimed in claim 9 , wherein:

the fourth driving assembly is disposed on the second optical element and used for driving the second optical element moving relative to the light-guiding element on the first light-guiding element surface;

the light-guiding element extends in a sixth direction; and

a normal vector of the first light-guiding element surface is not parallel to the sixth direction.

11 . The optical system as claimed in claim 10 , wherein:

the light enters the light-guiding element from the first light-guiding element surface;

the light exits the light-guiding element from the first light-guiding element surface;

the first light-guiding element surface comprises curved surface; and

the second light-guiding element surface comprises curved surface.

12 . The optical system as claimed in claim 11 , further comprising a lens disposed on the light-guiding element, wherein:

the lens and the image source assembly are disposed on opposite sides of the light-guiding element;

the second optical element and the lens are disposed on opposite sides of the light-guiding element;

an external light sequentially passes through the lens and the light-guiding element to reach an eye; and

the light sequentially passes through the light-guiding element and the second optical element to reach the eye.

13 . The optical system as claimed in claim 12 , wherein:

total internal reflection does not occur at an interface between the first optical element and the light-guiding element; and

total internal reflection does not occur at an interface between the second optical element and the light-guiding element.

14 . The optical system as claimed in claim 13 , further comprising:

a third optical element disposed between the light path adjusting assembly and the first optical element; and

a fifth driving assembly disposed on the first optical element.

15 . The optical system as claimed in claim 14 , wherein:

the first optical element and the third optical element are separated from each other; and

the fifth driving assembly is used for driving the first optical element moving on the first light-guiding element surface relative to the light-guiding element.

16 . The optical system as claimed in claim 15 , wherein:

the first optical element comprises a plurality of areas;

the microstructures in the areas are different; and

a plurality of microstructures are formed on a surface of the third optical element.

17 . The optical system as claimed in claim 16 , further comprising a fourth optical element, wherein the second optical element is disposed between the light-guiding element and the fourth optical element;

a plurality of microstructures are disposed on a surface of the fourth optical element; and

the light sequentially passes through the light-guiding element, the second optical element, and the fourth optical element to reach the eye.

18 . The optical system as claimed in claim 17 , further comprising:

a frame;

a processor electrically connected to the image source assembly and disposed on the frame;

an energy storage element electrically connected to the image source assembly and disposed on the frame; and

a memory element electrically connected to the image source assembly and disposed on the frame;

wherein the light-guiding element, the first optical element, and the image source assembly are disposed on the frame.