Optical element for a lidar system

1. A lidar system, comprising:

an optical element, including:

an expanding optical system configured to expand received light beams; and

a projection lens configured to receive and parallelize each of the expanded light beams from the expanding optical system;

wherein the expanding optical system is formed as a holographic optical element, the holographic optical element forming the expanding optical system including a holographic microlens array having a plurality of holographic microlenses, each of the holographic microlenses configured to expand at least one of the received light beams;

wherein the projection lens is also formed as a holographic element;

wherein the holographic element forming the expanding optical system is a first holographic film and the holographic element forming the projection lens is a second holographic film, and the first holographic film being laminated onto a first surface of a carrier material, and the second holographic film being laminated onto a second surface of the carrier material opposite to the first surface.

2. A method for producing an optical element for a lidar system, the method comprising:

providing an expanding optical system configured to expand received light beams; and

providing a projection lens configured to receive and parallelize each of the expanded light beams from the expanding optical system;

wherein the expanding optical system is configured holographically as a holographic element, the holographic element including a holographic microlens array having a plurality of holographic microlenses, each of the holographic microlenses configured to expand at least one of the received light beams;

wherein the projection lens is also formed as a holographic element;

wherein the holographic element forming the expanding optical system is a first holographic film and the holographic element forming the projection lens is a second holographic film, and the first holographic film being laminated onto a first surface of a carrier material, and the second holographic film being laminated onto a second surface of the carrier material opposite to the first surface.

3. The method of claim 2 , wherein a holographic optical element of the expanding optical system and/or a holographic optical element of the projection lens is configured such that a dimension of the projection lens orthogonal to the beam path is minimized.

4. The method of claim 2 , wherein the holographic optical element includes one optical function per layer.

5. The method of claim 2 , wherein the holographic optical elements of the expanding optical system and of the projection lens are configured such that a distance between the expanding optical system and the projection lens is minimized.

6. The method of claim 5 , wherein the holographic optical element includes a defined number of a plurality of optical functions per layer.

7. An optical element for a lidar system, comprising:

an optical element, including:

an expanding optical system configured to expand received light beams; and

a projection lens configured to receive and parallelize each of the expanded light beams from the expanding optical system;

wherein the expanding optical system is formed as a holographic optical element, the holographic optical element forming the expanding optical system including a holographic microlens array having a plurality of holographic microlenses, each of the holographic microlenses configured to expand at least one of the received light beams;

wherein the projection lens is also formed as a holographic element;

wherein the holographic element forming the expanding optical system is a first holographic film and the holographic element forming the projection lens is a second holographic film, and the first holographic film being laminated onto a first surface of a carrier material, and the second holographic film being laminated onto a second surface of the carrier material opposite to the first surface.

8. The optical element of claim 7 , wherein the projection lens is configured such that an f-number of the projection lens is smaller than one.

9. The optical element of claim 8 , wherein the holographic optical elements of the expanding optical system and of the projection lens are configured such that a distance between the expanding optical system and the projection lens is minimized.

10. The optical element of claim 9 , wherein the holographic optical element includes a defined number of a plurality of optical functions per layer.

11. The optical element of claim 7 , wherein the holographic optical element includes one optical function per layer.

12. The optical element of claim 7 , wherein the holographic optical element is formed from a polymer-based material.

13. The optical element of claim 7 , wherein at least one optical element is in a lidar sensor.