CN113238347B

CN113238347B - Multifunctional comprehensive relay lens

Info

Publication number: CN113238347B
Application number: CN202110665136.4A
Authority: CN
Inventors: 裴锐锐; 王瑶; 安峰博
Original assignee: Zhongshan Uvata Optical Co ltd
Current assignee: Zhongshan Uvata Optical Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2024-05-17
Anticipated expiration: 2041-06-16
Also published as: CN113238347A

Abstract

The invention discloses a multifunctional comprehensive relay lens, which is characterized in that: the dispersion coefficient is: the first lens and the second lens of 20-35 have the following dispersion coefficients: the second lens and the dispersion coefficient of 40-55 are as follows: the third lens of 65 to 85 has the following dispersion coefficient: 20-35, wherein the first lens, the second lens, the third lens and the fourth lens are sequentially arranged. The relay lens realizes the function of one lens with multiple functions, and the short-focus lens, the long-focus lens and the ultra-wide-angle lens can be matched with the relay lens to finish focusing and analysis test, so that the requirement on optical design is high, and the structure of four glass lenses is adopted, so that the lens has good imaging quality, good processability and low cost.

Description

Multifunctional comprehensive relay lens

Technical Field

The invention relates to a relay lens, in particular to a multifunctional comprehensive relay lens.

Background

With the development of the optical industry, the types of cameras are more and more, short-focus lenses, long-focus lenses, wide-angle lenses and the like, and detection systems before product modules such as mobile phones, vehicle-mounted products and digital products are used for detecting schemes with certain object distances, and the traditional schemes occupy huge detection space and can generate larger detection errors, so that the relay lens for detecting imaging is convenient for vast enterprises, and the specifications of the relay lens are correspondingly increased: 1. a short-focus lens is matched with a conventional relay lens with a large use angle and a wide shooting distance range; 2. long focus lens: a relay lens with long working distance is matched for use; 3. ultra-wide angle lens: the collimator is used in cooperation. The wide variety of relay lenses provides users with more and more specialized options, and at the same time, the cost is increased, and the comprehensive relay lenses become urgent market demands.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a multifunctional comprehensive relay lens.

The technical scheme adopted for solving the technical problems is as follows:

A multifunctional comprehensive relay lens is characterized in that: the dispersion coefficient is: the first lens and the second lens of 20-35 have the following dispersion coefficients: the second lens and the dispersion coefficient of 40-55 are as follows: the third lens of 65 to 85 has the following dispersion coefficient: 20-35, wherein the first lens is a positive lens and has a refractive index range of: 1.75 to 1.95, the focal length of the first lens is: f=50 mm, radius of curvature range R of face one of lens one: -70mm to-90 mm, the radius of curvature range R of the first face of the lens two: -30mm to-40 mm; the second lens is a negative lens and has the refractive index range of: 1.65 to 1.85, the focal length of the second lens is: f= -80mm, radius of curvature range R of face one of lens two: -20mm to-30 mm, the radius of curvature range R of the second face of the second lens: -50mm to-60 mm; the third lens is a positive lens and has the refractive index range of: 1.45-1.6, the focal length of the lens III is: f=80 mm, radius of curvature range R of face one of lens three: -120mm to-140 mm, the radius of curvature range R of the second face of the lens three: -20mm to-30 mm; the fourth lens is a negative lens and has a refractive index range of: 1.75 to 1.95, the focal length of the fourth lens is: f= -50mm, radius of curvature range R of face one of lens four: -45mm to-60 mm, the radius of curvature range R of the second face of the lens four: -100mm to-150 mm, wherein the first lens, the second lens, the third lens and the fourth lens are sequentially arranged.

The first refractive index of the lens is 1.85; the dispersion coefficient of the lens is 25, and the radius of curvature range R of the first surface of the lens is: -85mm, radius of curvature range R of face two of lens one: -35mm.

The second refractive index of the lens is 1.75; the second lens has a dispersion coefficient of 45, and the first lens has a first surface radius of curvature range R of: 25mm, radius of curvature range R of face two of lens two: -55mm.

The lens has a three refractive index of 1.5; the third lens has a dispersion coefficient of 70, and the first lens has a radius of curvature R ranging from: 130mm, radius of curvature range R of face two of lens three: -25mm.

The four refractive indexes of the lens are 1.8; the fourth lens has a dispersion coefficient of 25, and the first lens has a first surface radius of curvature range R of: -a radius of curvature range R of the second face of lens four of 52.5 mm: -125mm.

The beneficial effects of the invention are as follows: the relay lens realizes the function of one lens with multiple functions, and the short-focus lens, the long-focus lens and the ultra-wide-angle lens can be matched with the relay lens to finish focusing and analysis test, so that the requirement on optical design is high, and the structure of four glass lenses is adopted, so that the lens has good imaging quality, good processability and low cost.

The relay lens has the long working distance collimator performance: working distance 120mm, angle of view 10 degrees, shooting distance range 0.6m-inf; whereas conventional relay lens performance: working distance 20mm, field angle 90 degrees, shooting distance range 0.6m-inf; as can be seen from the comparison of the data, the performance of the relay lens is greatly superior to that of the conventional relay lens, so that the relay lens not only meets the higher requirements of clients, but also improves the market competitiveness.

Drawings

The invention will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the operation at a working distance of 20 mm;

fig. 2 is a schematic diagram of the operation at a working distance of 120 mm.

Detailed Description

Referring to fig. 1 and 2, the invention discloses a multifunctional integrated relay lens, which comprises the following components: lens one 2 of 20 to 35 has a dispersion coefficient of: lens two 3 of 40-55, dispersion coefficient: lens three 4 of 65 to 85 has a dispersion coefficient of: 20-35, lens four 5, lens one 2, lens two 3, lens three 4, lens four 5 are arranged in order, lens one 2 dispersion coefficient is preferably 25, lens two 3 dispersion coefficient is preferably 45, lens three 4 dispersion coefficient is preferably 70, lens four 5 dispersion coefficient is preferably 25, the lens one 2 left is the module 1 to be tested when the relay lens works, and lens four 5 right is the chart board 6, and the module to be tested can be an optical lens of digital products such as mobile phones.

The first lens 2 is a positive lens and has a refractive index range of: 1.75 to 1.95, the refractive index of the lens I2 in the application is preferably 1.85; the focal length of lens one 2 is: f=50 mm, radius of curvature range R of face one of lens one 2: -70 to-90, the radius of curvature range R of the second face of the lens one 2: -30 to-40, in the present application, the radius of curvature range R of the face one of the lens one 2 is preferably: -85mm, the radius of curvature range R of the face two of the lens one 2 is preferably: -35mm.

The second lens 3 is a negative lens and has a refractive index range of: 1.65 to 1.85, wherein the refractive index of the second lens 3 is preferably 1.75, and the focal length of the second lens 3 is as follows: f= -80mm, radius of curvature range R of face one of lens two 3: -20 to-30, the radius of curvature range R of the second face of the second lens 3: -50 to-60; in the present application, the radius of curvature range R of the first surface of the second lens 3 is preferably: the radius of curvature range R of the second face of the second lens 3 is preferably 25 mm: -55mm.

The third lens 4 is a positive lens and has a refractive index range of: 1.45 to 1.6, the refractive index of the lens III 4 is preferably 1.5, and the focal length of the lens III 4 is as follows: f=80 mm, radius of curvature range R of face one of lens three 4: -120 to-140, the radius of curvature range R of the second face of the lens three 4: -20 to-30, in the present application, the radius of curvature range R of the first surface of the lens three 4 is preferably: the radius of curvature range R of the second face of the lens three 4 is preferably 130 mm: -25mm.

The fourth lens 5 is a negative lens and has a refractive index range of: 1.75 to 1.95, the refractive index of the fourth lens 5 is preferably 1.8, and the focal length of the fourth lens 5 is as follows: f= -50mm, radius of curvature range R of face one of lens four 5: -45 to-60, the radius of curvature range R of the second face of the lens four 5: -100 to-150, in the present application, the radius of curvature range R of the face one of the lens four 5 is preferably: -52.5mm, the radius of curvature range R of the second face of the lens four 5 is preferably: -125mm.

The first middle surface represents the left arc surface of each lens in the first and second drawings, and the second middle surface represents the right arc surface of each lens in the first and second drawings.

In summary, through the combination design of different lenses and the combination design of the lens materials and the structural design of the lenses, the relay lens provided with the lens combination can achieve good MTF, distortion and focusing point when the working distance of the relay lens is 20mm and 120mm respectively, and particularly refer to the first table and the second table, so that the analysis or focusing of the lens can be realized, and the real reduction lens can analyze the real force value.

Table one:

and (II) table:

The foregoing has described in detail a multifunctional integrated relay lens according to an embodiment of the present invention, and specific examples have been applied herein to illustrate the principles and embodiments of the present invention, where the foregoing examples are provided to assist in understanding the method and core idea of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims

1. A multifunctional comprehensive relay lens is characterized in that: the lens consists of a first lens, a second lens, a third lens and a fourth lens in sequence from an object side to an image side; wherein, the focal length f=50mm, the refractive index is 1.85, the dispersion coefficient is 25, the curvature radius R of the object side is-85 mm, and the curvature radius R of the image side is-35 mm; the focal length f of the second lens is minus 80mm, the refractive index is 1.75, the dispersion coefficient is 45, the curvature radius R of the object side surface is minus 25mm, and the curvature radius R of the image side surface is minus 55mm; the focal length f=80 mm, the refractive index is 1.5, the dispersion coefficient is 70, the curvature radius R of the object side is-130 mm, and the curvature radius R of the image side is-25 mm; the focal length f of the fourth lens element is = -50mm, the refractive index is 1.8, the dispersion coefficient is 25, the curvature radius R of the object side surface is-52.5 mm, and the curvature radius R of the image side surface is-125 mm; the working distance of the comprehensive relay lens is 120mm, and the angle of view is 10 degrees.