CN203133371U

CN203133371U - Optical lens

Info

Publication number: CN203133371U
Application number: CN 201320060417
Authority: CN
Inventors: 邱菊珍
Original assignee: SHIDA PHOTOELECTRICITY (SHENZHEN) CO Ltd
Current assignee: SHIDA PHOTOELECTRICITY (SHENZHEN) CO Ltd
Priority date: 2013-02-01
Filing date: 2013-02-01
Publication date: 2013-08-14
Anticipated expiration: 2023-02-01

Abstract

The utility model discloses an optical lens, comprising, from image side to object side, a first lens, a second lens, a third lens and a fourth lens successively, wherein the first lens is a lens with a negative refraction index and comprises a first surface protruding towards the image side and a second surface recessed towards the object side, the second lens comprises a first surface protruding towards the image side and a second surface protruding towards the object side, the third lens comprises a first surface protruding towards the image side and a second surface protruding towards the object side, the fourth lens is a lens with a positive refraction index and comprises a first surface recessed towards the image side and a second surface protruding towards the object side, and center axes of the first lens, the second lens, the third lens and the fourth lens are located at a same line. According to the utility model, the optical lens composed by the first lens, the second lens, the third lens and the fourth lens has the advantages of guaranteed optical performance, reduced production cost and wide market values.

Description

Optical lens

Technical field

The utility model relates to the optical mirror slip assembly, relates in particular to a kind of optical lens.

Background technology

Optical lens is requisite parts in the Vision Builder for Automated Inspection, directly influences the quality of image quality, influences realization and the effect of algorithm.Strive for selecting suitable camera lens in addition, reduce the Vision Builder for Automated Inspection cost, the only way that the industry that is only is flourishing.

Present stage is more and more because audio and video products use, and its optical lens uses more and more frequent, so use all size to become more and more.Optical lens from focal length, can be divided into the short-focus mirror head, zoom lens, telephoto lens; From visual field size branch wide-angle, standard, long shot are arranged; Dividing on the structure has the fixed aperture tight shot, manual iris tight shot, auto iris tight shot, manual zoom lens, autozoom camera lens, auto iris motorized zoom lens, electronic three variable (aperture, focal length, focusing are all variable) camera lens etc.For optical lens, under the prerequisite that does not reduce image quality, shorten its length overall, and make great efforts to reduce the primary requirement that its cost becomes design.And the design of optical lens mainly is to the face type design of its lens and the material selection of eyeglass.

The utility model content

For solving the problems of the technologies described above, the utility model provides a kind of optical lens, can guarantee its image quality, reduces production costs.

The technical scheme that the utility model adopts is: a kind of optical lens is provided, comprises from first lens, second lens, the 3rd lens and the 4th lens that are arranged in order to the thing side as side; Described first lens are the lens of negative refractive index, comprise protruding first to the picture side and recessed to the thing side second; Described second lens comprise protruding in picture first of side and protruding to the thing side second; Described the 3rd lens comprise protruding in picture first of side and protruding to the thing side second; Described the 4th lens are the lens of positive refractive index, comprise recessed to picture first of side and protruding to the thing side second; The central shaft of described first lens, second lens, the 3rd lens and the 4th lens is on same straight line.

Concrete, first of described first lens is convex globoidal, and its radius-of-curvature is between 19.5 ~ 19.9mm, and second of described first lens is cancave cambered surface, its radius-of-curvature is between 2.8 ~ 3.2mm, and the center thickness of described first lens is between 0.6 ~ 1.0mm.

Concrete, first of described second lens is convex globoidal, and its radius-of-curvature is between 8.9 ~ 9.3mm, and second of described second lens is convex globoidal, its radius-of-curvature is between 6.2 ~ 6.6mm, and the center thickness of described second lens is between 5.0 ~ 5.4mm.

Concrete, first of described the 3rd lens is convex globoidal, and its radius-of-curvature is between 6.4 ~ 6.8mm, and second of described the 3rd lens is convex globoidal, its radius-of-curvature is between 2.8 ~ 3.2mm, and the center thickness of described the 3rd lens is between 4.0 ~ 4.4mm.

Concrete, first of described the 4th lens is cancave cambered surface, and its radius-of-curvature is between 2.8 ~ 3.2mm, and second of described the 4th lens is convex globoidal, its radius-of-curvature is between 22.8 ~ 23.2mm, and the center thickness of described the 4th lens is between 0.4 ~ 0.8mm.

Wherein, the material of described first lens, second lens, the 3rd lens and the 4th lens is glass.

Useful technique effect of the present utility model is: the utility model provides a kind of optical lens, comprise from first lens, second lens, the 3rd lens and the 4th lens that are arranged in order to the thing side as side, and the central axis of first lens, second lens, the 3rd lens and the 4th lens is on same straight line.Reflected by objects light the 4th lens in this optical lens, the 3rd lens, second lens and first lens successively enters the imaging of imaging rear flank, the imaging requirements that can adapt to the different images product, and the optical lens of being made up of first lens, second lens, the 3rd lens and the 4th lens can guarantee its optical property, and can reduce it and become to produce cost, have vast market and be worth.

Description of drawings

Fig. 1 is the structural representation of the utility model optical lens;

Fig. 2 is the structural representation of the utility model first lens;

Fig. 3 is the structural representation of the utility model second lens;

Fig. 4 is the structural representation of the utility model the 3rd lens;

Fig. 5 is the structural representation of the utility model the 4th lens.

Label declaration:

1-first lens, first of 1a-, second of 1b-, 1c-center thickness; 2-second lens, first of 2a-, second of 2b-, 2c-center thickness; 3-the 3rd lens, first of 3a-, second of 3b-, 3c-center thickness; 4-the 4th lens, first of 4a-, second of 4b-, 4c-center thickness.

Embodiment

By describing technology contents of the present utility model, structural attitude in detail, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.

See also Fig. 1, a kind of optical lens of the utility model comprises from first lens 1, second lens 2, the 3rd lens 3 and the 4th lens 4 that are arranged in order to the thing side as side; The first above-mentioned lens 1 comprise protruding first 1a and recessed second 1b to the thing side to the picture side for the lens of negative refractive index; Described second lens 2 comprise protruding first 2a and protruding second 2b to the thing side to the picture side; Described the 3rd lens 3 comprise protruding first 3a and protruding second 3b to the thing side to the picture side; Described the 4th lens 4 are the lens of positive refractive index, comprise recessed first 4a and protruding second 4b to the thing side to the picture side; The central shaft of described first lens 1, second lens 2, the 3rd lens 3 and the 4th lens 4 is on same straight line.First lens 1 and the 4th lens 4 are the semilune lens, and second lens 2 and the 3rd lens 3 are convex lens.

Consult Fig. 2, first of first lens 1 1a is convex globoidal in the above-mentioned optical lens, its radius-of-curvature is between 19.5 ~ 19.9mm, second 1b of described first lens 1 is cancave cambered surface, its radius-of-curvature is between 2.8 ~ 3.2mm, and the center thickness 1c of described first lens 1 is between 0.6 ~ 1.0mm.

Consult Fig. 3, first of second lens 2 2a is convex globoidal in the above-mentioned optical lens, its radius-of-curvature is between 8.9 ~ 9.3mm, second 2b of described second lens 2 is convex globoidal, its radius-of-curvature is between 6.2 ~ 6.6mm, and the center thickness 2c of described second lens 2 is between 5.0 ~ 5.4mm.

Consult Fig. 4, first of the 3rd lens 3 3a is convex globoidal in the above-mentioned optical lens, its radius-of-curvature is between 6.4 ~ 6.8mm, second 3b of described the 3rd lens 3 is convex globoidal, its radius-of-curvature is between 2.8 ~ 3.2mm, and the center thickness 3c of described the 3rd lens 3 is between 4.0 ~ 4.4mm.

Consult Fig. 5, first of the 4th lens 4 4a is cancave cambered surface in the above-mentioned optical lens, its radius-of-curvature is between 2.8 ~ 3.2mm, second 4b of described the 4th lens 4 is convex globoidal, its radius-of-curvature is between 22.8 ~ 23.2mm, and the center thickness 4c of described the 4th lens 4 is between 0.4 ~ 0.8mm.

Above-mentioned center thickness size is along the length scale of the position of central shaft between first and second on each lens.

In a specific embodiment, the material of described first lens 1, second lens 2, the 3rd lens 3 and the 4th lens 4 is glass.Glass material is conducive to guarantee image quality.

Design by above-mentioned first lens, second lens, the 3rd lens and the 4th lens can provide a kind of new optical lens specifications design to satisfy the imaging demand of different optical product, be particularly suitable for recording journey instrument, alert with on the products such as law enforcement instrument, motion DV, have the production cost that reduces optical lens, shortened the advantages such as length of lens.

A kind of optical lens that the utility model proposes, comprise from first lens, second lens, the 3rd lens and the 4th lens that are arranged in order to the thing side as side, and the central axis of first lens, second lens, the 3rd lens and the 4th lens is on same straight line.Reflected by objects light the 4th lens in this optical lens, the 3rd lens, second lens and first lens successively enters the imaging of imaging rear flank, the imaging requirements that can adapt to the different images product, and the optical lens of being made up of first lens, second lens, the 3rd lens and the 4th lens can guarantee its optical property, and can reduce it and become to produce cost, have vast market and be worth.

The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims

1. an optical lens is characterized in that, comprises from first lens, second lens, the 3rd lens and the 4th lens that are arranged in order to the thing side as side;

Described first lens are the lens of negative refractive index, comprise protruding first to the picture side and recessed to the thing side second;

Described second lens comprise protruding in picture first of side and protruding to the thing side second;

Described the 3rd lens comprise protruding in picture first of side and protruding to the thing side second;

Described the 4th lens are the lens of positive refractive index, comprise recessed to picture first of side and protruding to the thing side second;

The central shaft of described first lens, second lens, the 3rd lens and the 4th lens is on same straight line.

2. optical lens according to claim 1, it is characterized in that, first of described first lens is convex globoidal, its radius-of-curvature is between 19.5 ~ 19.9mm, second of described first lens is cancave cambered surface, its radius-of-curvature is between 2.8 ~ 3.2mm, and the center thickness of described first lens is between 0.6 ~ 1.0mm.

3. optical lens according to claim 1, it is characterized in that, first of described second lens is convex globoidal, its radius-of-curvature is between 8.9 ~ 9.3mm, second of described second lens is convex globoidal, its radius-of-curvature is between 6.2 ~ 6.6mm, and the center thickness of described second lens is between 5.0 ~ 5.4mm.

4. optical lens according to claim 1, it is characterized in that, first of described the 3rd lens is convex globoidal, its radius-of-curvature is between 6.4 ~ 6.8mm, second of described the 3rd lens is convex globoidal, its radius-of-curvature is between 2.8 ~ 3.2mm, and the center thickness of described the 3rd lens is between 4.0 ~ 4.4mm.

5. optical lens according to claim 1, it is characterized in that, first of described the 4th lens is cancave cambered surface, its radius-of-curvature is between 2.8 ~ 3.2mm, second of described the 4th lens is convex globoidal, its radius-of-curvature is between 22.8 ~ 23.2mm, and the center thickness of described the 4th lens is between 0.4 ~ 0.8mm.

6. according to each described optical lens of claim 1-5, it is characterized in that the material of described first lens, second lens, the 3rd lens and the 4th lens is glass.