CN218213596U - Super wide angle optical image system - Google Patents

Abstract

The application discloses super wide angle optics image system includes along the light incident direction: the lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and an image plane, wherein the first lens and the second lens are meniscus lenses, the third lens and the sixth lens are plano-convex lenses, and the fourth lens is a biconvex lens. The optical imaging system can realize the coverage of an ultra-large wide angle range of 234 degrees under the condition of matching with a CCD imaging chip 1/2.7' through reasonable distribution of focal power.

Description

Super wide angle optical image system

Technical Field

The present disclosure relates to optical imaging systems, and particularly to an ultra-wide angle optical imaging system.

Background

At present, the field angle of the wide-angle lens launched by most manufacturers is basically within 170 degrees, the wide-angle lens cannot meet the requirement of a larger angle range, and many wide-angle lenses belong to the category of fish eye imaging property and cannot realize full-frame imaging.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a super wide angle optical image system to overcome not enough among the prior art.

In order to achieve the above purpose, the utility model provides a following technical scheme: an ultra-wide angle optical imaging system, comprising in a light incident direction: the lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and an image plane, wherein the first lens and the second lens are meniscus lenses, the third lens and the sixth lens are plano-convex lenses, and the fourth lens is a biconvex lens.

Preferably, the image plane is a photosensitive element CCD/CMOS.

Preferably, the sagittal height ratio of the first lens is greater than 0.8.

Preferably, the third lens and the sixth lens are flat on the sides close to the image plane.

Preferably, the fourth lens and the fifth lens are a cemented lens group formed by cementing optical photosensitive glue together.

Preferably, the optical power of the first lens is negative; the focal power of the second lens is negative; the focal power of the third lens is positive; the focal power of the fourth lens is positive; the focal power of the fifth lens is negative; the focal power of the sixth lens is positive; the focal power of the cemented lens group is positive.

Preferably, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens satisfy:

a first lens: r1 is more than or equal to 10 and less than or equal to 15, R2 is more than or equal to 3.5 and less than or equal to 5.6 and less than or equal to 1.0;

a second lens: r1 is more than or equal to 10 and less than or equal to 16, R2 is more than or equal to 2 and less than or equal to 3.5 and less than or equal to 0.7;

a third lens: r1 is more than or equal to 4 and less than or equal to 6, R2 is = ∞, D is more than or equal to 1.2 and less than or equal to 1.4;

a fourth lens: r1 is more than or equal to 5 and less than or equal to 6, R2 is more than or equal to 3 and less than or equal to-2, D is more than or equal to 1.4 and less than or equal to 2.0;

a fifth lens: r1 is more than or equal to-3 and less than or equal to-2-8 and less than or equal to-10 of R2, D is more than or equal to 0.4 and less than or equal to 0.7;

a sixth lens: r1 is more than or equal to 10 and less than or equal to 12R2= ∞, D is more than or equal to 1.0 and less than or equal to 1.2;

wherein: r1 and R2 are the curvature radius values of the two surfaces of the lens, and D is the central thickness value of the lens.

Preferably, the diaphragm satisfies:

wherein: d is the aperture size of the diaphragm, F is the relative aperture value of the optical system, and F is the focal length value of the optical system.

Compared with the prior art, the optical imaging system can realize the ultra-large wide-angle range coverage of 234 degrees by reasonable distribution of focal power under the condition of matching with a CCD imaging chip 1/2.7 ".

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of an ultra-wide angle optical imaging system according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating an optical aberration of an ultra-wide angle optical imaging system according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating field curvature and distortion of an optical system of an ultra-wide angle optical imaging system according to an embodiment of the present invention;

fig. 4 is a schematic diagram of relative illumination of an optical system of an ultra-wide angle optical imaging system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, an ultra-wide angle optical imaging system includes, along a light incident direction: the zoom lens comprises a first lens G1, a second lens G2, a third lens G3, a diaphragm, a fourth lens G4, a fifth lens G5, a sixth lens G6 and an image plane, wherein the first lens G1 and the second lens G2 are meniscus lenses, the third lens G3 and the sixth lens G6 are plano-convex lenses, and the fourth lens G4 is a biconvex lens.

Preferably, the image plane is a photosensitive element CCD/CMOS.

Preferably, the first lens G1 has a radial-to-height ratio of greater than 0.8. The lens processing can be facilitated by a high aperture rise ratio.

Preferably, the third lens G3 and the sixth lens G6 are flat on the image plane side.

Preferably, the fourth lens G4 and the fifth lens G5 are a cemented lens group in which optical photosensitive cement is cemented together.

In the technical scheme, the fourth lens G4 and the fifth lens G5 are glued together in a photosensitive glue and optical constant-temperature baking mode to form a group of gluing lens groups.

Preferably, the focal power of the first lens G1 is negative; the focal power of the second lens G2 is negative; the focal power of the third lens G3 is positive; the focal power of the fourth lens G4 is positive; the focal power of the fifth lens G5 is negative; the focal power of the sixth lens G6 is positive; the focal power of the cemented lens group is positive.

Preferably, the first lens G1, the second lens G2, the third lens G3, the fourth lens G4, the fifth lens G5, and the sixth lens G6 satisfy:

first lens G1: r1 is more than or equal to 10 and less than or equal to 15, R2 is more than or equal to 3.5 and less than or equal to 5.6 and less than or equal to 1.0;

second lens G2: r1 is more than or equal to 10 and less than or equal to 16, R2 is more than or equal to 2 and less than or equal to 3.5 and less than or equal to 0.7;

third lens G3: r1 is more than or equal to 4 and less than or equal to 6, R2 is more than or equal to infinity, D is more than or equal to 1.2 and less than or equal to 1.4;

fourth lens G4: r1 is more than or equal to 5 and less than or equal to 6, R2 is more than or equal to 3 and less than or equal to-2, D is more than or equal to 1.4 and less than or equal to 2.0;

fifth lens G5: r1 is more than or equal to-3 and less than or equal to-2-8 and less than or equal to-10 of R2, and D is more than or equal to 0.4 and less than or equal to 0.7;

sixth lens G6: r1 is more than or equal to 10 and less than or equal to 12R2= ∞, D is more than or equal to 1.0 and less than or equal to 1.2;

wherein: r1 and R2 are curvature radius values of both surfaces of the lens, and D is a central thickness value of the lens.

Preferably, the diaphragm satisfies:

wherein: d is the aperture size of the diaphragm, F is the relative aperture value of the optical system, and F is the focal length value of the optical system.

Fig. 2 is a schematic diagram of an optical aberration of an ultra-wide angle optical imaging system according to an embodiment of the present invention; fig. 3 is a schematic view illustrating field curvature and distortion of an optical system of an ultra-wide angle optical imaging system according to an embodiment of the present invention; fig. 4 is a schematic diagram of relative illumination of an optical system of an ultra-wide angle optical imaging system according to an embodiment of the present invention.

The optical image system can realize the coverage of an ultra-large wide angle range of 234 degrees under the condition of matching with a CCD imaging chip 1/2.7' through reasonable distribution of focal power.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

The foregoing is merely a detailed description of the present application and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application and should also be considered as within the scope of the present application.

Claims (8)

1. An ultra-wide angle optical imaging system, comprising: the light ray incidence direction comprises: the lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and an image plane, wherein the first lens and the second lens are meniscus lenses, the third lens and the sixth lens are plano-convex lenses, and the fourth lens is a biconvex lens.

2. A super wide-angle optical imaging system according to claim 1, wherein: the image surface is a photosensitive element CCD/CMOS.

3. The ultra-wide angle optical imaging system of claim 1, wherein: the first lens has a sagittal height ratio greater than 0.8.

4. The ultra-wide angle optical imaging system of claim 1, wherein: and one sides of the third lens and the sixth lens, which are close to the image plane, are planes.

5. The ultra-wide angle optical imaging system of claim 1, wherein: the fourth lens and the fifth lens are a cemented lens group formed by cementing optical photosensitive cement together.

6. An ultra-wide angle optical imaging system as claimed in claim 5, wherein: the focal power of the first lens is negative; the focal power of the second lens is negative; the focal power of the third lens is positive; the focal power of the fourth lens is positive; the focal power of the fifth lens is negative; the focal power of the sixth lens is positive; the focal power of the cemented lens group is positive.

7. A super wide-angle optical imaging system according to claim 1, wherein: the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens satisfy:

a first lens: r1 is more than or equal to 10 and less than or equal to 15, R2 is more than or equal to 3.5 and less than or equal to 5.6 and less than or equal to 1.0;

a second lens: r1 is more than or equal to 10 and less than or equal to 16, R2 is more than or equal to 2 and less than or equal to 3.5 and less than or equal to 0.7;

a third lens: r1 is more than or equal to 4 and less than or equal to 6, R2 is = ∞, D is more than or equal to 1.2 and less than or equal to 1.4;

a fourth lens: r1 is more than or equal to 5 and less than or equal to 6, R2 is more than or equal to 3 and less than or equal to-2, D is more than or equal to 1.4 and less than or equal to 2.0;

a fifth lens: r1 is more than or equal to-3 and less than or equal to-2-8 and less than or equal to-10 of R2, D is more than or equal to 0.4 and less than or equal to 0.7;

a sixth lens: r1 is more than or equal to 10 and less than or equal to 12R2= ∞, D is more than or equal to 1.0 and less than or equal to 1.2;

wherein: r1 and R2 are curvature radius values of both surfaces of the lens, and D is a central thickness value of the lens.

8. The ultra-wide angle optical imaging system of claim 1, wherein: the diaphragm satisfies:

wherein: d is the aperture size of the diaphragm, F is the relative aperture value of the optical system, and F is the focal length value of the optical system.

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