CN211603623U - Optical module - Google Patents

Abstract

The utility model relates to the field of optics, in particular to an optical lens and an optical module thereof, wherein the optical lens is of an asymmetric structure at the optical center, and the external structure of the optical lens is of an asymmetric structure; compared with the prior art, the utility model discloses a design an optical lens and optical module that have optics center asymmetric structure, can satisfy multiple light path design requirement for it is applicable in multiple light path design, thereby makes its practical application more extensive, has improved its using value, and further, need not to set up different optical module when needing a plurality of light path designs, thereby has reduced the cost of material design.

Description

Optical module

Technical Field

The utility model relates to an optics field, concretely relates to optical module.

Background

In the prior art, lenses in an optical module all adopt optical axis central symmetry structures, the optical path heights of the lenses are consistent, the lenses are generally only suitable for a specific certain optical path design, and when a plurality of optical path designs are needed, a plurality of optical axis central symmetry structures with different optical path heights are needed to meet requirements, so that the material design cost is high.

Therefore, designing an optical lens and an optical module thereof, which have asymmetric optical centers and can meet various optical path design requirements, has been a problem of intensive research in the field.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide an optical lens and optical module that optical center is asymmetric, can satisfy multiple light path design requirement, thereby overcome among the prior art an optical module and only adapt to a light path design and make the defect with high costs of material design among the practical application.

The utility model provides a technical scheme that its technical problem adopted is: provided is an optical lens, preferably comprising: the optical lens is of an optical center asymmetric structure, and the outer structure of the optical lens is of an asymmetric structure.

The optical lens is preferably applied to a 100G/400G high-speed optical module.

For solving the defect that prior art exists, the utility model discloses still provide an optical module, its preferred scheme lies in: the optical module includes the optical lens, the optical interface and the optical device group, and the light is emitted after being incident to the optical device group and the optical lens through the optical interface respectively.

Wherein, the preferred scheme is that the optical interface is a pigtail.

Preferably, the optical device set includes a collimating lens for collimating light and a focusing lens for focusing light.

The optical module further comprises a filter, the light enters the collimating lens through the tail fiber, is collimated and then sequentially enters the filter and the optical lens, and finally is focused by the focusing lens and then is emitted.

The beneficial effects of the utility model reside in that, compared with the prior art, the utility model discloses a design an optical lens and optical module that have optics center asymmetric structure, can satisfy multiple light path design requirement for it is applicable in multiple light path design, thereby makes its practical application more extensive, has improved its using value, and further, need not to set up different optical module when needing a plurality of light path designs, thereby has reduced the cost of material design.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of an optical module in the present invention;

fig. 2 is a first schematic structural diagram of an optical lens according to the present invention;

FIG. 3 is a schematic diagram of a prior art optical lens;

FIG. 4 is a structural comparison diagram of an optical lens;

fig. 5 is a schematic structural diagram of an optical lens according to the present invention.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the present invention provides a preferred embodiment of an optical module.

An optical module includes a pigtail 100, a first lens 200, a filter module 300, an optical lens 400 and a third lens 500, where light enters the first lens 200 through the pigtail 100, enters the filter module 300 through the first lens 200 for filtering, and then enters the optical lens 400 and the third lens 500 in sequence for emission, where the optical lens 400 is an optical center asymmetric structure.

The asymmetric structure of the optical center means that the distances from the upper edge and the lower edge of the lens to the optical center are different, so that the optical center of the lens is changed after the lens rotates for a certain angle, and the asymmetric structure of the optical center is suitable for a plurality of different optical path designs.

Wherein, the optical module is a 100G/400G high-speed optical module.

The first lens 200 is a collimating lens for collimating light.

The third lens 500 is a focusing lens for focusing light.

An optical module (optical module) is composed of an optoelectronic device, a functional circuit, an optical interface and the like, wherein the optoelectronic device comprises a transmitting part and a receiving part, in a simple way, the optical module is used for photoelectric conversion, a transmitting end converts an electric signal into an optical signal, a receiving end converts the optical signal into the electric signal after the optical signal is transmitted through an optical fiber, and a 100G/400G high-speed optical module is adopted in the embodiment.

The collimating lens is an instrument capable of changing light rays from each point in the aperture stop into a parallel collimated light beam; the lens type depends on the aberration requirement, the requirement is low, a simple single-chip lens such as a plano-convex or biconvex lens can be adopted, and a larger relative aperture is allowed; the requirement is high, and the relative aperture is also properly reduced by adopting a double-cemented lens; the corresponding type of the collimating lens can be selected according to specific conditions.

The focusing lens belongs to a gradient refractive index lens; it has the characteristics of end face focusing and imaging, and has the cylindrical appearance characteristic, so that it can be used in several different miniature optical systems; there are 5 basic types of focusing lenses: plano-convex, positive meniscus, aspheric, diffractive and reflective lenses; the last type of reflector is usually an off-axis parabolic reflector, but some system designers use a spherical reflector with a small incident angle to perform the same function, and can select the corresponding focusing lens type according to specific situations.

As shown in fig. 2-5, the present invention provides a preferred embodiment of an optical lens.

The optical lens 400 has an asymmetric optical center structure and an asymmetric outer structure.

The optical lens 400 is applied to a 100G/400G high-speed optical module.

In this embodiment, referring to fig. 2, the optical lens 400 adopts a square structure, and the conventional optical modules all adopt circular lenses with symmetric external structures, that is, all adopt circular lenses 400' (referring to fig. 3) with symmetric optical centers, and the main differences between the two are:

the optical central axis of the circular lens is at the central point A of the lens, and the distance between the axial point A and the upper edge and the lower edge of the lens is the same, so that the optical height of the axial point in the optical path is unchanged no matter how the lens is rotated, the optical height of each product is different, and the lenses with the same optical height can only adapt to the same optical path design; in this embodiment, the square-structured lens has an asymmetric optical center, and the distance from the optical center B to the upper edge and the lower edge of the lens is different, so that the lens can have two optical heights, and different optical heights can be selected by rotating the lens by 180 degrees, thereby adapting to various optical path designs.

Specifically, and referring to fig. 4, for the existing lens, L1 ═ L2 'can only satisfy one optical path design of the required optical height L ═ L1 ═ L2'; for the optical lens 400 in the present embodiment, L1 ≠ L2, so that it can satisfy the optical path design of the required optical height L ═ L1, and can also satisfy the optical path design of the required optical height L ≠ L2 by rotating it 180 degrees, which effectively reduces the cost compared with the prior art.

Further, and with reference to fig. 5, the upper and lower edges of the second lens are 0.33mm and 0.55mm from the optical center position, respectively, i.e., L1-0.33 mm and L2-0.55 mm.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is intended to cover all equivalent changes and modifications made within the scope of the present invention.

Claims (5)

1. An optical module, characterized in that: the optical module comprises an optical lens, an optical interface and an optical device group, light rays are respectively incident to the optical device group and the optical lens through the optical interface and then emitted out, the optical center of the optical lens is asymmetric, and the external structure of the optical lens is an asymmetric structure.

2. The optical module of claim 1, wherein: the optical interface is a pigtail.

3. The light module of claim 2, wherein: the optical device group comprises a collimating lens for collimating light and a focusing lens for focusing light.

4. The light module of claim 3, wherein: the optical module also comprises a filter, external light enters the collimating lens through the tail fiber, is collimated and then sequentially enters the filter and the optical lens, and finally is focused through the focusing lens and then is emitted.

5. The optical module of claim 1, wherein: the optical module is a 100G/400G high-speed optical module.

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