CN207051519U - A curved optical lens - Google Patents

Abstract

The utility model discloses a curved optical lens, which comprises a lens surface and a boss connected with the lens surface; the mirror surface comprises an incident surface and an emergent surface; the boss is arranged between the incident surface and the emergent surface; the curved surface equation of the mirror surface is as follows: z = cr²/(1+SQRT(1‑(1+k)c²r²))+A₁X+A₂Y+2A₃（r²-1); wherein, the curved surface takes the center of the lens as the origin, and the lens is horizontally arranged; x represents the transverse direction, Y represents the longitudinal direction, c represents the radius of curvature, k represents the conic coefficient, r represents the distance from the corresponding coordinate position to the origin, A₁、A₂、A₃All are constant coefficients. The utility model discloses an foretell setting for the light of camera lens is when throwing through optical lens piece, and the deflection of its formation of image is few and edge formation of image definition is high.

Description

A curved optical lens

technical field

The utility model relates to the technical field of optical mirrors, in particular to a curved optical mirror.

Background technique

Today, lens modules have been widely used in various portable electronic products to achieve convenient camera functions, and in order to adapt to various light environments, people are eager to equip these electronic products with flashlights. With the advancement of technology, existing The volume of the flashlight is also being made smaller and smaller, and it has been able to adapt to various miniaturized portable electronic products. Generally, the flashlight includes a light source. In order to ensure the effect of the emitted light, an optical lens is also arranged in front of the light source. The lens usually cooperates with the outer surface of the electronic product to protect the internal structure of the flash and make the structure of the flash not too abrupt. At the same time, the optical lens should also have the function of making the emitted light of the flash more uniform and soft. Due to the obvious advantages of optical plastic lenses in terms of stability, environmental protection, and low cost, they have been widely used in mobile phone lenses and other camera lenses, especially in mobile phone lenses.

At present, aspherical optical lenses are mostly used in optical plastic lenses. This kind of lens has a 360-degree circular symmetric structure. In reality, the images we see are usually rectangular images of 4:3 or 16:9. Obviously, in the imaging distortion requirements Under the premise of high requirements and high edge definition, aspheric lenses cannot meet the requirements.

Contents of the invention

The purpose of the utility model is to provide a curved optical lens with less imaging deformation and high edge imaging definition to solve the above-mentioned shortcomings in the prior art.

The purpose of the utility model is achieved through the following technical solutions: a curved optical lens, including a mirror surface and a boss connected to the mirror surface; the mirror surface includes an incident surface and an outgoing surface; the convex platform is arranged on the incident surface and the outgoing surface between; the surface equation of the mirror is: Z=cr ² /(1+SQRT(1-(1+k)c ² r ² ))+ A ₁ X+A ₂ Y+2A ₃ (r ² -1 ); wherein, the curved surface takes the center of the lens as the origin, and the lens is placed horizontally; X represents the horizontal direction, Y represents the longitudinal direction, c is the radius of curvature, k is the quadratic surface coefficient, r is the distance from the corresponding coordinate position to the origin, A ₁ , A ₂ , A ₃ are all constant coefficients.

The utility model is further provided that two symmetrical planes are arranged on both sides of the boss.

The utility model is further configured that the mirror surface is made of a transparent optical resin material with a refractive index between 1.3 and 1.8.

The utility model is further configured that the mirror surface is made of a transparent optical resin material with a transmittance between 85% and 94%.

The utility model is further configured that the central thickness of the mirror surface is between 0.35-0.55mm.

The utility model is further configured that the dispersion coefficient of the mirror surface is between 45-60.

Beneficial effects of the utility model: the utility model adopts the above-mentioned setting, so that when the light of the lens is projected through the optical lens, the deformation of the image is less, and the definition of the edge image is high.

Description of drawings

Utilize accompanying drawing to further illustrate the utility model, but the embodiment in the accompanying drawing does not constitute any restriction to the utility model, for those of ordinary skill in the art, under the premise of not paying creative work, also can obtain according to following accompanying drawing Additional drawings.

Fig. 1 is the top view of the utility model;

Fig. 2 is a sectional view of the utility model;

Fig. 3 is the light path figure of the utility model;

Fig. 4 is the distortion schematic diagram of the present utility model;

Explanation of reference numerals among Fig. 1 to Fig. 4:

1-boss; 2-incident surface; 3-exit surface; 4-plane.

detailed description

The utility model is further described in conjunction with the following examples.

It can be seen from Fig. 1 and Fig. 2; a kind of curved optical lens described in this embodiment includes a mirror surface and a boss 1 connected with the mirror surface; the mirror surface includes an incident surface 2 and an exit surface 3; the boss 1 Set between the incident surface 2 and the outgoing surface 3; the surface equation of the mirror is: Z=cr ² /(1+SQRT(1-(1+k)c ² r ² ))+ A ₁ X+A ₂ Y+2A ₃ r ² -1; where, the curved surface takes the center of the lens as the origin, and the lens is placed horizontally; X indicates the horizontal direction, Y indicates the longitudinal direction, c is the radius of curvature, k is the quadratic surface coefficient, and r is the corresponding coordinate position The distance to the origin, A ₁ , A ₂ , A ₃ are all constant coefficients. Through the above-mentioned settings, when the light of the lens is projected through the optical lens, the deformation of the image is small, and the edge imaging definition is high; as shown in Figure 3, the light output of the curved surface equation is concentrated on the edge of the lens, so that The edge definition of the image is high; as shown in Figure 4, the distortion of the lens is less than 2.0%, which meets the requirements of less distortion required by the lens on the market. It is worth noting that the relationship between X, Y, and Z in the surface equation has not been recorded in relevant documents by the applicant through previous searches. It was obtained by the applicant by chance through long-term observation and experiments. The method can achieve the effect of less imaging deformation and high edge imaging definition.

In the curved optical lens described in this embodiment, two planes 4 are arranged symmetrically on both sides of the boss 1 . When installing the lens and the mirror barrel, the two planes 4 are used to fix the positions of the lens and the mirror barrel, ensuring that the relative position of the lens is aligned with the imaging position.

In the curved optical lens described in this embodiment, the mirror surface is made of a transparent optical resin material with a refractive index between 1.3 and 1.8, preferably 1.6, and the optical resin with this refractive index makes the image clearer.

In the curved optical lens described in this embodiment, the mirror surface is made of a transparent optical resin material with a transmittance of 85%-94%, and the transmittance is preferably 88%. The optical resin with this transmittance Make the image clearer.

In the curved optical lens described in this embodiment, the central thickness of the mirror surface is between 0.35-0.55 mm, and the central thickness is preferably 0.43 mm. The optical resin with this central thickness makes the image clearer.

In the curved optical lens described in this embodiment, the dispersion coefficient of the mirror surface is between 45-60. The dispersion coefficient is preferably 54mm, and the optical resin with this dispersion coefficient makes the image clearer.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Personnel should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the utility model.

Claims (6)

1. A kind of 1. optical lens with curved surface, it is characterised in that：Include minute surface and the boss being connected with minute surface（1）；The minute surface Include the plane of incidence（2）And exit facet（3）；The boss（1）Located at the plane of incidence（2）With exit facet（3）Between；The minute surface Surface equation be：Z=cr² /(1+SQRT(1-(1+k)c² r² ))+ A₁X+A₂Y+2A₃（r²-1）；Wherein, the curved surface is with eyeglass Center is origin, and eyeglass is horizontal positioned；X represents horizontal direction, and Y represents longitudinal direction, and c is radius of curvature, and k is quadratic surface system Number, r are respective coordinates position to the distance of origin, A₁、A₂、A₃It is constant coefficient.
2. A kind of 2. optical lens with curved surface according to claim 1, it is characterised in that：The boss（1）Both sides symmetrically set There are two planes（4）.
3. A kind of 3. optical lens with curved surface according to claim 1, it is characterised in that：The minute surface uses refractive index as 1.3- Transparent optical resin material between 1.8 is made.
4. A kind of 4. optical lens with curved surface according to claim 1, it is characterised in that：The minute surface uses transmitance as 85%- Transparent optical resin material between 94% is made.
5. A kind of 5. optical lens with curved surface according to claim 1, it is characterised in that：The center thickness of the minute surface exists Between 0.35-0.55mm.
6. A kind of 6. optical lens with curved surface according to claim 1, it is characterised in that：The abbe number of the minute surface is in 45- Between 60.