Optical module and augmented reality glasses

Abstract

An optical module includes a first lens, an optical waveguide element, and a second lens stacked sequentially, as well as a fixing frame and a limiting element. The fixing frame connects at least to the edge of the optical waveguide element. The limiting element is disposed on the side of the fixing frame facing the optical waveguide element. The optical module also includes encapsulating adhesive or locking elements disposed on the fixing frame. The encapsulating adhesive or locking elements cooperate with the limiting element and the fixing frame to fix the first lens, the optical waveguide element, and the second lens together. This optical module effectively avoids the difficulties and problems in the bonding process caused by using encapsulating adhesive to bond the various components of the optical module, and improves the assembly efficiency of the optical module. This application also provides augmented reality glasses including this optical module.

Claims

1. An optical module, improved in that: the optical module comprises: A first lens, an optical waveguide element, and a second lens are stacked sequentially; a fixing frame is provided, at least connecting the edge of the optical waveguide element. A limiting element is disposed on the side of the fixing frame facing the optical waveguide element; and an encapsulating adhesive or locking element is disposed on the fixing frame. The encapsulating adhesive or the locking element cooperates with the limiting element and the fixing frame to fix the first lens, the optical waveguide element, and the second lens as a whole. The optical module includes the locking element. The fixing frame includes a first frame portion and a second frame portion that are rotatably connected. One end of the first frame portion and one end of the second frame portion are connected, and the other end of the first frame portion and the other end of the second frame portion are connected by the locking element. The first frame portion and the second frame portion together surround the periphery of the first lens, the optical waveguide element, and the second lens.

2. The optical module according to claim 1, wherein, The optical module includes the encapsulating adhesive; the fixing frame connects the edge ends of the first lens, the optical waveguide element, and the second lens; the limiting element includes a limiting part, which is fixed to the fixing frame by the encapsulating adhesive; the fixing frame is provided with a baffle corresponding to the first lens, and the first lens, the optical waveguide element, and the second lens, which are stacked in sequence, are sandwiched between the baffle and the limiting part, the connection area between the baffle and the first lens is provided with the encapsulating adhesive, and the connection area between the limiting part and the second lens is provided with the encapsulating adhesive.

3. The optical module according to claim 2, wherein, The surface of the baffle facing the first lens is shaped to match the surface of the first lens facing away from the optical waveguide element, so that the edge of the first lens is attached to the baffle; the surface of the limiting part facing the second lens is shaped to match the surface of the second lens facing away from the optical waveguide element, so that the edge of the second lens is attached to the limiting part.

4. The optical module according to claim 2, wherein, The limiting element further includes a first spacer ring and a second spacer ring, wherein the first spacer ring is sandwiched between the optical waveguide element and the first lens, and the second spacer ring is sandwiched between the optical waveguide element and the second lens.

5. The optical module according to claim 4, wherein, The encapsulating adhesive is disposed in the connection area between the first spacer ring and the optical waveguide element and in the connection area between the first spacer ring and the first lens; the encapsulating adhesive is disposed in the connection area between the second spacer ring and the optical waveguide element and in the connection area between the second spacer ring and the second lens.

6. The optical module according to claim 1, wherein, The limiting element is respectively provided on the first frame portion and the second frame portion. The limiting element includes a first clamping portion and a second clamping portion that are spaced apart from each other, and the edge portion of the optical waveguide element is sandwiched between the first clamping portion and the second clamping portion.

7. The optical module according to claim 6, wherein, The limiting element further includes a third holding portion, which is located on the side of the first holding portion away from the second holding portion and is spaced apart from the first holding portion; the edge portion of the first lens is sandwiched between the first holding portion and the third holding portion, and the first holding portion is sandwiched between the first lens and the optical waveguide element.

8. The optical module according to claim 6, wherein, The limiting element further includes a fourth holding part, which is located on the side of the second holding part away from the first holding part and is spaced apart from the first holding part; a slot is provided on the edge of the second lens, which cooperates with the fourth holding part, and the fourth holding part extends into the slot; the second holding part is clamped between the second lens and the optical waveguide element.

9. The optical module according to claim 1, wherein, When the optical module includes the locking element; the fixing frame includes a separate first frame portion and a second frame portion, the first frame portion and the second frame portion are respectively located at opposite ends of the optical waveguide element, and the optical waveguide element is sandwiched between the first frame portion and the second frame portion; the locking element includes a first locking element and a second locking element, the first locking element locks the first lens, the first frame portion and the second lens into one unit, and fixes the first frame portion between the first lens and the second lens, the second locking element locks the first lens, the second frame portion and the second lens into one unit, and fixes the second frame portion between the first lens and the second lens.

10. The optical module according to claim 9, wherein, The first locking element includes a screw or nut and a nut, the screw or nut passing through the first lens, the first frame portion, and the second lens, and the nut locking the end of the screw or nut, thereby locking the first lens, the first frame portion, and the second lens together; the second locking element includes a screw or nut and a nut, the screw or nut passing through the first lens, the second frame portion, and the second lens, and the nut locking the end of the screw or nut, thereby locking the first lens, the second frame portion, and the second lens together.

11. The optical module according to claim 9, wherein, The first frame portion and the second frame portion are respectively provided with retaining grooves, and the two opposite ends of the edge portion of the optical waveguide element are respectively limited in the retaining grooves of the first frame portion and the retaining grooves of the second frame portion.

12. An augmented reality glasses, improved in that it includes a projection system and an optical module as described in any one of claims 1 to 11, the projection system being used to generate a light beam that is projected onto the optical module.

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