CN217846759U

CN217846759U - Relay mirror of intermediate infrared band

Info

Publication number: CN217846759U
Application number: CN202222279992.9U
Authority: CN
Inventors: 谭少沛; 安峰博; 梁玮琪
Original assignee: Zhongshan Uvata Optical Co ltd
Current assignee: Zhongshan Uvata Optical Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-11-18
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses a relay lens of intermediate infrared band, including lens one and lens two that set up along the optical axis order, lens one is plano-convex lens, lens two is biconcave lens, lens one is positive focal lens and its plane is towards the Chart board and the convex surface is towards the module under test; the first lens is a negative-focus lens, the first surface 3 of the first lens faces a Chart plate, the second surface 4 of the first lens faces a module to be tested, the curvature radius value of the first surface 3 is smaller than that of the second surface 4, the first lens and the second lens are spherical lenses made of germanium glass materials, the lens of the structure is a relay lens developed according to a middle infrared band, and the wavelength range of the middle infrared band is as follows: 8um to 12um; the relay mirror has the advantages that: with a large exit pupil value: the exit pupil diameter value is 6.4; the structure of two pieces of glass is adopted, but good imaging quality is achieved; the design uses less lenses, thereby having low cost.

Description

Relay mirror of intermediate infrared band

Technical Field

The utility model relates to a relay lens, especially a relay lens of intermediate infrared band.

Background

As is well known, light is an electromagnetic wave, and is generally divided into an ultraviolet band, a visible band, and an infrared band, which is further divided into: near infrared (0.75 um-3.0 um), mid infrared (3.0 um-20 um) and far infrared (20 um-1000 um), optical lenses developed according to these wavebands have been widely used in corresponding fields. The cameras in the visible light band are most applied, the occupation ratio of the infrared cameras in the market is increased along with the development of infrared technology in the present year, and then the relay lens in the visible light band cannot detect the imaging quality of the infrared lens.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a relay lens of a middle infrared band.

The utility model provides a technical scheme that its technical problem adopted is:

a relay lens of intermediate infrared band is characterized in that: the device comprises a first lens and a second lens which are sequentially arranged along an optical axis, wherein the first lens is a plano-convex lens, the second lens is a biconcave lens, the first lens is a positive focal lens, the plane of the first lens faces a Chart plate, and the convex surface of the first lens faces a module to be tested; the first lens is a negative-focus lens, the first surface of the first lens faces the Chart plate, the second surface of the first lens faces the tested module, and the curvature radius value of the first surface is smaller than that of the second surface.

The refractive index of the lens is as follows: 4.1.

the lens has a refractive index: 4.1.

radius of curvature of the convex surface of the first lens: -180mm to-380 mm.

The curvature radius of the first surface of the second lens is as follows: -300mm to-700 mm; radius of curvature of face two: 600 mm-1000 mm.

The lens has a focal length: f =100mm.

The second focal length of the lens is as follows: f = -60mm.

The beneficial effects of the utility model are that: the utility model discloses a lens one and lens two that set up along the optical axis order, lens one is plano-convex lens, lens two is biconcave lens, lens one is positive focal lens and its plane is towards the Chart board and the convex surface is towards the module under test; the first lens is a negative-focus lens, the first surface of the first lens faces the Chart plate, the second surface of the first lens faces the module to be tested, the curvature radius value of the first surface is smaller than that of the second surface, the first lens and the second lens are spherical lenses made of germanium glass materials, the first lens and the second lens are relay lenses developed according to middle infrared bands, and the wavelength range of the middle infrared bands is as follows: 8um to 12um; the relay mirror has the advantages that:

1, having a large exit pupil value: the exit pupil diameter value is 6.4;

2, a structure of two pieces of glass is adopted, but good imaging quality is achieved;

3, the design uses less lenses, thereby having low cost.

Drawings

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

Fig. 1 is a lens arrangement of the present invention;

fig. 2 is an optical schematic diagram of the present invention.

Detailed Description

Advantages and features of the present disclosure and methods of practicing the same will be clarified by the following embodiments described with reference to the accompanying drawings. This disclosure may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the present disclosure is to be limited only by the scope of the claims.

The shapes, sizes, proportions, angles and numbers disclosed in the accompanying drawings for describing embodiments of the present disclosure are by way of example only, and are not intended to be limited to the details shown. Like reference numerals refer to like elements throughout the specification. In the following description, when a detailed description of a related known function or configuration is determined to unnecessarily obscure the focus of the present disclosure, the detailed description will be omitted. In the case of using "including", "having", and "including" described in this specification, other components may be added unless "only" is used. Unless indicated to the contrary, singular terms may include the plural.

In explaining the elements, although not explicitly described, the elements are understood to include error ranges.

In describing the positional relationship, for example, when the positional relationship is described as "on 8230 \8230;," on 8230;, "\82308230;," "on 8230;, \8230; below" and \8230; "adjacent," one or more portions may be disposed between two other portions unless "immediately" or "directly" is used.

In describing the temporal relationship, for example, when the temporal sequence is described as "after" \8230; \8230, then "," next ", and" before "\8230; \8230, before" may include the case of discontinuity unless "just" or "directly" is used.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure.

As will be well understood by those skilled in the art, the features of the different embodiments of the present disclosure may be partially or fully coupled or combined with each other, and may cooperate with each other and be technically driven in various ways. Embodiments of the present disclosure may be performed independently of each other, or may be performed together in an interdependent relationship.

Referring to fig. 1 and 2, the utility model discloses a relay lens of mid-infrared band, which comprises a first lens 1 and a second lens 2 which are arranged along an optical axis in sequence, wherein the first lens 1 is a plano-convex lens, the second lens 2 is a biconcave lens, the first lens 1 is a positive focal lens, the plane of the first lens faces a Chart board, and the convex surface of the first lens faces a module to be measured; the first lens 1 is a negative-focus lens, the first surface 3 of the first lens faces the Chart plate, the second surface 4 of the first lens faces the tested module, the curvature radius value of the first surface 3 is smaller than that of the second surface 4, the first lens 1 and the second lens 2 are spherical lenses made of germanium glass materials, and the tested module can be an optical instrument such as a camera.

In the present application, the radius of curvature of the convex surface of the lens 1: -180mm to-380 mm; radius of curvature of first surface 3 of second lens 2: -300mm to-700 mm; radius of curvature of face two 4: 600 mm-1000 mm.

In the present application, the first lens 1 preferably has: 4.1; the second lens 2 preferably has a refractive index: 4.1.

in the present application, the first focal length of the lens is preferably 1: f =100mm; the second 2 focal lengths of the lenses are preferably: f = -60mm.

The radius of curvature of the convex surface of the lens 1 is preferably: -280mm; the radius of curvature of the first surface 3 of the second lens 2 is preferably: -500mm; the radius of curvature of the second face 4 is preferably: 800mm.

Through the optimized parameters, the relay lens achieves good imaging quality.

The performance parameters that this application relay mirror can realize: FOV:88 degrees; working distance: 29mm; simulation range: 500mm-INF. And the germanium glass material is commercially available GENMANINUM.

The relay lens of the intermediate infrared band provided by the embodiment of the present invention is introduced in detail, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A relay lens of intermediate infrared band is characterized in that: the device comprises a first lens and a second lens which are sequentially arranged along an optical axis, wherein the first lens is a plano-convex lens, the second lens is a biconcave lens, the first lens is a positive focal lens, the plane of the first lens faces a Chart plate, and the convex surface of the first lens faces a module to be tested; the first lens is a negative-focus lens, the first surface of the first lens faces the Chart plate, the second surface of the first lens faces the tested module, and the curvature radius value of the first surface is smaller than that of the second surface.

2. The relay lens in the mid-infrared band according to claim 1, wherein: the refractive index of the lens is: 4.1.

3. the relay lens in the mid-infrared band according to claim 1, wherein: the refractive index of the lens is as follows: 4.1.

4. the relay lens in the mid-infrared band according to claim 1, wherein: radius of curvature of the convex surface of the first lens: -180mm to-380 mm.

5. The relay lens in the mid-infrared band according to claim 1, wherein: the curvature radius of the first surface of the second lens is as follows: -300mm to-700 mm; radius of curvature of face two: 600 mm-1000 mm.

6. The relay lens in the mid-infrared band according to claim 1, wherein: the lens has a focal length: f =100mm.

7. The relay lens in the mid-infrared band according to claim 1, wherein: the second focal length of the lens is as follows: f = -60mm.