Optical assembly having a housing for mounting optical lenses

1. A housing assembly for mounting a first lens and a second lens, comprising:

a first lens holder comprising a ring-shaped structure configured to mount the first lens; and

a second lens holder comprising a cup-shaped structure, the cup-shaped structure comprising an upper portion configured to mount the first lens holder, and a lower portion configured to mount the second lens,

wherein the upper portion of the second lens holder comprises a supporting surface configured to support the first lens holder and a wall portion extending from the supporting surface toward the first lens holder, and

wherein the first lens holder is mounted to the second lens holder, and the upper portion of the second lens holder comprises a plurality of side holes penetrating through the wall portion of the upper portion in a radial direction parallel to the supporting surface of the second lens holder, the side holes configured to receive a plurality of screws for securing the first lens holder to the second lens holder, and for adjusting an alignment between the first lens holder and the second lens holder.

2. The housing assembly of claim 1 , wherein the cup-shaped structure comprises a first opening provided at the upper portion and a second opening provided at the lower portion, the first opening having a first dimension that is greater than a second dimension of the second opening.

3. The housing assembly of claim 1 , wherein the wall portion extends perpendicularly from the supporting surface toward the first lens holder.

4. The housing assembly of claim 1 , wherein the wall portion comprises a plurality of ear portions configured to mount on a mounting bracket of a rotation stage.

5. The housing assembly of claim 4 , wherein each of the plurality of ear portions comprises one or more vertical holes configured to receive one or more screws, at least one of the one or more screws being adjustable to change at least one of a centering of the second lens or a tilting of the second lens.

6. The housing assembly of claim 1 , wherein the first lens holder comprises a first member configured to mount the first lens, and wherein the first member comprises a plurality of side holes provided on a circumferential side to receive a plurality of screws for securing the first lens.

7. The housing assembly of claim 6 , wherein the first lens holder further comprises:

a second member;

a third member,

wherein the first member, the second member, and the third member are stacked together with the second member disposed between the first member and the third member.

8. The housing assembly of claim 7 , wherein the first lens holder further comprises:

one or more springs disposed between a lower portion of the third member and a surface top portion of the first member, the one or more springs being in a compressed state when the first member and the third member are connected.

9. The housing assembly of claim 8 , wherein the first lens holder further comprises:

one or more screws configured to connect the first member with the third member,

wherein the one or more screws are configured to be adjustable to cause a tilting of the first lens to be changed by a resilient force exerted by the one or more springs.

10. The housing assembly of claim 8 , wherein the first lens holder further comprises:

one or more screws configured to connect the third member with the second member.

11. The housing assembly of claim 7 , wherein the third member further comprises one or more side holes provided on a side wall of the third member and configured to receive one or more screws that secure the third member to a mounting bracket of a rotation stage.

12. An optical assembly, comprising:

a first lens holder;

a first lens mounted to the first lens holder;

a second lens holder; and

a second lens mounted to the second lens holder,

wherein the first lens holder is mounted to the second lens holder, and the first lens is aligned with the second lens, and

wherein the second lens holder comprises a cup-shaped structure having an upper portion configured to mount the first lens holder, and a lower portion configured to mount the second lens,

wherein the upper portion of the second lens holder comprises a supporting surface configured to support the first lens holder and a wall portion extending from the supporting surface toward the first lens holder, and

wherein the upper portion of the second lens holder comprises a plurality of side holes penetrating through the wall portion of the upper portion in a radial direction parallel to the supporting surface of the second lens holder, the side holes configured to receive a plurality of screws for securing the first lens holder to the second lens holder, and for adjusting an alignment between the first lens holder and the second lens holder.

13. The optical assembly of claim 12 , wherein the first lens holder comprises a ring-shaped structure.

14. The optical assembly of claim 12 , wherein the cup-shaped structure comprises a first opening provided at the upper portion and a second opening provided at the lower portion, the first opening is larger than the second opening.

15. An optical device, comprising:

an optical assembly, comprising:

a first lens holder;

a first lens mounted to the first lens holder;

a second lens holder; and

a second lens mounted to the second lens holder,

wherein the first lens holder is mounted to the second lens holder, and the first lens is aligned with the second lens,

wherein the second lens holder comprises a cup-shaped structure having an upper portion configured to mount the first lens holder, and a lower portion configured to mount the second lens, wherein the upper portion of the second lens holder comprises a supporting surface configured to support the first lens holder and a wall portion extending from the supporting surface toward the first lens holder, and

wherein the upper portion of the second lens holder comprises a plurality of side holes penetrating through the wall portion of the upper portion in a radial direction parallel to the supporting surface of the second lens holder, the side holes configured to receive a plurality of screws for securing the first lens holder to the second lens holder, and for adjusting an alignment between the first lens holder and the second lens holder;

a display; and

a base cover configured to mount the display, the base cover being mounted to the second lens holder of the optical assembly.

16. The optical assembly of claim 12 , wherein the first lens is aligned with the second lens with a surface of the first lens being in parallel with a surface of the second lens.

17. The optical device of claim 15 , wherein the first lens is aligned with the second lens with a surface of the first lens being in parallel with a surface of the second lens.