CN105068225A

CN105068225A - Telecentric optical lens

Info

Publication number: CN105068225A
Application number: CN201510443280.8A
Authority: CN
Inventors: 郭春生; 刘勇; 曹桂红
Original assignee: Shandong University Weihai
Current assignee: Shandong University Weihai
Priority date: 2015-07-27
Filing date: 2015-07-27
Publication date: 2015-11-18

Abstract

The invention discloses a telecentric optical lens. The telecentric optical lens comprises first, second, third, fourth and fifth lenses which are sequentially coaxially arranged along the transmission direction of an incident light ray. The first lens is a plano-concave negative lens. The second lens is a plano-convex lens. The third lens is a plano-convex lens. The fourth lens is a double-curved lens. The fifth lens is a plano-concave negative lens. Through arrangement and parameter design of first, second, third, fourth and fifth lenses of the telecentric optical lens, the telecentric optical lens is telecentric, and meets the requirements of achromatic aberration and relatively large aperture.

Description

Telecentric optics camera lens

Technical field

The present invention relates to a kind of field of optical lens, particularly relate to a kind of laser telecentric optics camera lens.

Background technology

Laser processing application is very extensive, shaping (cutting and excision) such as in flexible circuit board processing, cut into slices and hole; The cutting of solar energy film; The cutting of thin sheet glass and sheet metal and punching.Along with the development of the development of laser processing technology, particularly optical system, general optical lens by the composite design of multiple optical lens to realize the effect of the heart far away, i.e. telecentric optics camera lens.But, due to the line space design between the setting of the optical parametric of each optical lens of telecentric optics camera lens and each lens, make telecentric optics camera lens be difficult to meet achromatism and relatively wide-aperture requirement simultaneously.

Summary of the invention

Based on this, be necessary to provide a kind of telecentric optics camera lens that simultaneously can meet achromatism and relatively wide-aperture requirement.

A kind of telecentric optics camera lens, it is characterized in that, comprise the first lens along the transmission direction co-axial alignment successively of incident ray to the 5th lens, these first lens are platycelous negative lens, these second lens are plane-convex lens, 3rd lens are plane-convex lens, 4th lens are bitoric lens, 5th lens are platycelous negative lens, these first lens comprise first surface and the second curved surface, these second lens comprise the 3rd curved surface and the 4th curved surface, 3rd lens comprise the 5th curved surface and the 6th curved surface, 4th lens comprise the 7th curved surface and the 8th curved surface, 5th lens comprise zigzag face and the tenth curved surface, two curved surfaces of each lens are light entrance face and the light-emitting face of lens respectively, this first to the tenth curved surface is arranged successively along the transmission direction of incident ray, this is second years old, four, five, eight curved surfaces and the tenth curved surface are plane, the radius-of-curvature of this first surface is-50 ± 5% millimeter, the radius-of-curvature of the 3rd curved surface is 80 ± 5%, the radius-of-curvature of the 6th curved surface is-300 ± 5%, 7th curved surface is hyperboloid, the radius-of-curvature in zigzag face is-150 ± 5%, unit is millimeter.

These first lens are followed successively by 5 ± 5%, 20 ± 5%, 28 ± 5%, 10 ± 5%, 4 ± 5% to the center thickness of the 5th lens, and unit is millimeter.

The refractive index of these the first lens and the ratio of Abbe number are (1.8/26) ± 5%, these second lens are (1.7/50) ± 5% to the refractive index of the 4th lens and the ratio of Abbe number,, the refractive index of the 5th lens and the ratio of Abbe number are (1.6/35) ± 5%.

By arrangement and the parameter designing of the first to the 5th lens of this telecentric optics camera lens, this telecentric optics camera lens can be made to meet disappear edge aberration and relatively wide-aperture requirement simultaneously.

[accompanying drawing explanation]

By the more specifically explanation of the preferred embodiments of the present invention shown in accompanying drawing, above-mentioned and other object of the present invention, Characteristics and advantages will become more clear.Reference numeral identical in whole accompanying drawing indicates identical part, and does not deliberately draw accompanying drawing by physical size equal proportion convergent-divergent, focuses on purport of the present invention is shown.

Fig. 1 is the structural representation of the telecentric optics camera lens in an embodiment.

[embodiment]

For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public concrete enforcement.

It should be noted that, in this instructions, the direction of propagation of light is propagated from the left side of accompanying drawing to the right.The positive and negative intersection point with the sphere center position of curved surface and primary optical axis of radius-of-curvature is as the criterion, and the centre of sphere of curved surface is at this point with a left side, then radius-of-curvature is negative; Otherwise the centre of sphere of curved surface is at this point with the right side, then radius-of-curvature is just.In addition, be positioned at the camera lens left side for object space, being positioned on the right of camera lens is image space.Positive lens refers to that the center thickness of lens is greater than the lens than edge thickness, and negative lens refers to that the center thickness of lens is less than the thick lens in edge.

Figure 1 shows that the structural representation of the telecentric optics camera lens in an embodiment, for convenience of explanation, illustrate only part related to the present invention.Telecentric optics camera lens comprises the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens L4, the 5th lens L5 of the transmission direction co-axial alignment successively along incident ray.Wherein, comprise the first lens along the transmission direction co-axial alignment successively of incident ray to the 5th lens, these first lens are platycelous negative lens, these second lens are plane-convex lens, 3rd lens are plane-convex lens, 4th lens are bitoric lens, 5th lens are platycelous negative lens, these first lens comprise first surface and the second curved surface, these second lens comprise the 3rd curved surface and the 4th curved surface, 3rd lens comprise the 5th curved surface and the 6th curved surface, 4th lens comprise the 7th curved surface and the 8th curved surface, 5th lens comprise zigzag face and the tenth curved surface, two curved surfaces of each lens are light entrance face and the light-emitting face of lens respectively, this first to the tenth curved surface is arranged successively along the transmission direction of incident ray, this is second years old, four, five, eight curved surfaces and the tenth curved surface are plane, the radius-of-curvature of this first surface is-50 ± 5% millimeter, the radius-of-curvature of the 3rd curved surface is 80 ± 5%, the radius-of-curvature of the 6th curved surface is-300 ± 5%, 7th curved surface is hyperboloid, the radius-of-curvature in zigzag face is-150 ± 5%, unit is millimeter.

In addition, the corresponding construction parameter of inventor to above-mentioned five lens has carried out following design.Particularly:

These first lens are followed successively by 5 ± 5%, 20 ± 5%, 28 ± 5%, 10 ± 5%, 4 ± 5% to the center thickness of the 5th lens, and unit is millimeter.The refractive index of these the first lens and the ratio of Abbe number are (1.8/26) ± 5%, these second lens are (1.7/50) ± 5% to the refractive index of the 4th lens and the ratio of Abbe number,, the refractive index of the 5th lens and the ratio of Abbe number are (1.6/35) ± 5%.

In addition, inventor has carried out following design to the distance between each adjacent lens.Particularly, the exit facet (the second curved surface S2) of the first lens L1 and the plane of incidence (the 3rd curved surface S3) spacing on optical axis of the second lens L2 are 7mm, and tolerance is 5%.The exit facet (the 4th curved surface S4) of the second lens L2 and the plane of incidence (the 5th curved surface S5) spacing on optical axis of the 3rd lens L3 are 0.5mm, and tolerance is 5%.The exit facet (the 6th curved surface S6) of the 3rd lens L3 and the plane of incidence (the 7th curved surface S7) spacing on optical axis of the 4th lens L4 are 5mm, and tolerance is 5%.The exit facet (the 8th curved surface S8) of the 4th lens L4 and the plane of incidence (the zigzag face S9) spacing on optical axis of the 5th lens L5 are 12mm, and tolerance is 5%.

The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims

1. a telecentric optics camera lens, it is characterized in that, comprise the first lens along the transmission direction co-axial alignment successively of incident ray to the 5th lens, these first lens are platycelous negative lens, these second lens are plane-convex lens, 3rd lens are plane-convex lens, 4th lens are bitoric lens, 5th lens are platycelous negative lens, these first lens comprise first surface and the second curved surface, these second lens comprise the 3rd curved surface and the 4th curved surface, 3rd lens comprise the 5th curved surface and the 6th curved surface, 4th lens comprise the 7th curved surface and the 8th curved surface, 5th lens comprise zigzag face and the tenth curved surface, two curved surfaces of each lens are light entrance face and the light-emitting face of lens respectively, this first to the tenth curved surface is arranged successively along the transmission direction of incident ray, this is second years old, four, five, eight curved surfaces and the tenth curved surface are plane, the radius-of-curvature of this first surface is-50 ± 5% millimeter, the radius-of-curvature of the 3rd curved surface is 80 ± 5%, the radius-of-curvature of the 6th curved surface is-300 ± 5%, 7th curved surface is hyperboloid, the radius-of-curvature in zigzag face is-150 ± 5%, unit is millimeter.

2. laser telecentric optics camera lens according to claim 1, is characterized in that, these first lens are followed successively by 5 ± 5%, 20 ± 5%, 28 ± 5%, 10 ± 5%, 4 ± 5% to the center thickness of the 5th lens, and unit is millimeter.

3. laser telecentric optics camera lens according to claim 1, it is characterized in that, the refractive index of these the first lens and the ratio of Abbe number are (1.8/26) ± 5%, these second lens are (1.7/50) ± 5% to the refractive index of the 4th lens and the ratio of Abbe number,, the refractive index of the 5th lens and the ratio of Abbe number are (1.6/35) ± 5%.