CN218601563U - Infrared range-increasing lens of infrared three-proofing mobile phone - Google Patents
Infrared range-increasing lens of infrared three-proofing mobile phone Download PDFInfo
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- CN218601563U CN218601563U CN202222739710.9U CN202222739710U CN218601563U CN 218601563 U CN218601563 U CN 218601563U CN 202222739710 U CN202222739710 U CN 202222739710U CN 218601563 U CN218601563 U CN 218601563U
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Abstract
The embodiment of the utility model discloses infrared range-increasing camera lens of infrared three proofings cell-phone, the camera lens includes: positive lens, negative lens that sets gradually from the left hand right side along light incidence direction, protection glass and image plane window, wherein, positive lens with negative lens all includes towards the thing side that makes imaging light pass through and towards the image side that makes imaging light pass through, the thing side and the image side of positive lens are spherical lens, the thing side and the image side of negative lens are aspheric lens, positive lens with the combined focal length less than or equal to 900mm of negative lens. Infrared range-increasing lens compact structure, reasonable in design, the lens figure is few, the image quality is good, can satisfy the range-increasing purpose of the infrared three proofings cell-phone focus of short focal length. In addition, the device also has the advantages of convenience in installation, simplicity in operation, good economic performance, strong practicability and the like.
Description
Technical Field
The utility model relates to the field of imaging technology, especially, relate to an infrared distance-increasing camera lens of infrared three proofings cell-phone.
Background
An infrared three-proofing mobile phone is an industrial detection mobile phone integrating a long-wave (8-14 mu m) infrared imaging module on the mobile phone. The infrared thermal imaging device utilizes the principle of infrared thermal imaging, absorbs and senses infrared rays radiated outwards by an object through an infrared detector, and converts invisible and abstract temperature information into a visual thermal image by adopting a professional photoelectric signal processing technology. Thereby directly presenting the heat dissipation and heating conditions of each part of the equipment and the environment. Because of the characteristics of accurate temperature measurement, small volume, portability, water resistance, dust resistance, falling resistance and the like, the device is widely applied to industries such as electric power, heating ventilation, petrochemical industry, track inspection, fire control maintenance and the like.
However, in the existing infrared three-proofing mobile phone, the detection distance is too short due to the too short focal length of the built-in infrared lens, and clear imaging cannot be realized on a remote detection target.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an infrared distance-increasing camera lens of infrared three proofings cell-phone for solve among the prior art built-in infrared camera lens focus short excessively, lead to its detection range short excessively, can't realize the problem of clear formation of image to the remote detection target. In order to reach one or part or whole purpose or other purposes above-mentioned, the utility model provides an infrared range lens of infrared three proofings cell-phone, include:
positive lens, negative lens, protection glass and image plane window that set gradually from the left hand right side along light incidence direction, wherein, positive lens with negative lens all includes towards the thing side that makes imaging light pass through and towards the image side that the image side just made imaging light pass through, the object side and the image side of positive lens are spherical lens, the object side and the image side of negative lens are aspherical lens, positive lens with the combined focal length less than or equal to 900mm of negative lens.
Optionally, the air space between the positive lens and the negative lens is 5.63mm; the distance between the negative lens and the protective glass is 3.68mm.
Optionally, the positive lens and the negative lens are both made of germanium materials.
Optionally, the positive lens has a positive diopter, and a focal length of the positive lens is less than or equal to 13.54mm; the negative lens has negative diopter, and the focal length of the negative lens is less than or equal to-6.47 mm.
Optionally, the object-side surface of the positive lens is a convex surface, and the image-side surface of the positive lens is a concave surface; the object side surface of the negative lens is a convex surface, and the image side surface of the negative lens is a concave surface.
Optionally, the total length of the optical path of the infrared distance-increasing lens is less than or equal to 13.6mm.
Implement the embodiment of the utility model provides a, will have following beneficial effect:
infrared distance-increasing lens compact structure, reasonable in design, the lens figure is few, imaging quality is good, can satisfy the distance-increasing purpose of the infrared three proofings cell-phone focus of short focal length. In addition, the device also has the advantages of convenience in installation, simplicity in operation, good economic performance, strong practicability and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
fig. 1 is a schematic view of an optical structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of MTF at 20 ℃ according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating curvature and distortion of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, in this embodiment, a 9mm infrared distance-increasing lens is provided, and the original focal length of the infrared three-proofing mobile phone lens is increased from 3mm to 9mm. The lens is characterized in that a positive lens 1, a negative lens 2, protective glass 3 and an image plane window 4 are sequentially arranged from left to right along the incident light direction.
The air space between the positive lens 1 and the negative lens 2 is 5.63mm; the distance between the negative lens 2 and the protective glass 3 is 3.68mm.
In a possible embodiment, the positive lens 1 and the negative lens 2 are of germanium material.
In this embodiment, the positive lens focal length dimension f1, the negative lens focal length B f2, and the system focal length formed by the positive lens 1 and the negative lens 2 f satisfy the following conditions:
f1<＝13.54mm；f2<＝-6.47mm；f<＝900mm
the lens can obtain good imaging quality within the wavelength range of 8um-14 μm by satisfying the conditions.
On the basis of embodiment 1, in the present embodiment, the optical structure composed of the positive lens 1 and the negative lens 2 achieves the following criteria: the working wave band is as follows: 8um-14 μm; focal length: f =9mm; relative pore diameter D/f:1/1.0; angle of view (D × H × V): 23.4 ° 20.8 ° 15.6 °; distortion of TV: <6%; exit pupil distance: 5.15mm; resolution ratio: the long-wave infrared non-refrigeration type 256 x 192,12 mu m can be met; the total length of the light path is less than or equal to 13.6mm, and the optical back intercept is 6mm.
In addition to embodiment 1, in this embodiment, both the left and right surfaces of the positive lens 1 are spherical surfaces, and both the left and right surfaces of the negative lens 2 are aspherical surfaces.
In this embodiment, the optical element parameter table formed by the positive lens 1 and the negative lens 2 is shown in table 1, wherein S1, S2, S3, S4, and S5 represent the left surface of the positive lens 1, the negative lens 2, and the glass protective sheet 3, which are sequentially measured, and the detailed optical data are shown in table 1-1.
TABLE 1-1
| Noodle sequence number | Surface type | Radius of curvature (mm) | Thickness/spacing (mm) | Material quality | ||
| S0 | Shot object plane | Infinity | | |||
| S1 | Lens | |||||
| 1 | Spherical surface | 17.2827 | 2.76 | Germanium material | ||
| S2 | Spherical surface | 12.8634 | 5.84 | |||
| | Lens | 2 | Aspherical surface | 14.257327 | 1.52 | Germanium material |
| S4 | Aspherical surface | 7.2578240 | 7.34 | |||
| S5 | |
Infinity | Silicon material |
In this embodiment, the lens 2 is an aspherical lens, aspherical data in this embodiment is shown in table 1-1, and an equation expression of an aspherical lens curve is as follows:
wherein z isWhen the aspheric surface reaches the position of the height r along the optical axis direction, the distance vector from the vertex of the aspheric surface is high; c is the curvature of the aspheric vertex; k: cone coefficient (Conic constant); r is the radial distance;
A 4 、A 6 、A 8 expressed as high-order aspheric coefficients, the respective coefficient tables in the examples are shown in the following table 2-1:
TABLE 2-1
| Surface of | S3 | S4 |
| k | 1.037563 | 2.1634593 |
| A 4 | 1.046785E-03 | 9.4328713E-04 |
| A 6 | -9.35653E-05 | -1.867243E-04 |
| A 8 | 2.346721E-06 | -1.245786E-06 |
In this embodiment, fig. 2 is an MTF curve graph of the lens described in this application at 20 ℃, and as can be seen from fig. 2, MTF values of the lens are all greater than 0.2, and the lens has high imaging contrast and good image imaging quality. Fig. 3 is a graph showing curvature and distortion of a lens, and it can be seen from fig. 3 that the optical distortion of the lens according to the present application provides good image quality at a distortion of less than 6%.
It will be understood by those skilled in the art that the various modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and optionally they may be implemented by program code executable by a computing device, such that it may be stored in a memory device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present invention is not limited to any specific combination of hardware and software.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (6)
1. The utility model provides an infrared distance-increasing camera lens of infrared three proofings cell-phone which characterized in that, the camera lens includes: positive lens, negative lens, protection glass and image plane window that set gradually from the left hand right side along light incidence direction, wherein, positive lens with negative lens all includes towards the thing side that makes imaging light pass through and towards the image side that the image side just made imaging light pass through, the object side and the image side of positive lens are spherical lens, the object side and the image side of negative lens are aspherical lens, positive lens with the combined focal length less than or equal to 900mm of negative lens.
2. The infrared distance-increasing lens of the infrared three-proofing mobile phone according to claim 1, wherein the air space between the positive lens and the negative lens is 5.63mm; the distance between the negative lens and the protective glass is 3.68mm.
3. The infrared distance-increasing lens of the infrared three-proofing mobile phone according to claim 1, wherein the positive lens and the negative lens are both made of germanium material.
4. The infrared distance-increasing lens of the infrared three-proofing mobile phone according to claim 1, wherein the positive lens has a positive diopter, and the focal length of the positive lens is less than or equal to 13.54mm; the negative lens has negative diopter, and the focal length of the negative lens is less than or equal to-6.47 mm.
5. The infrared distance-increasing lens of the infrared three-proofing mobile phone according to claim 1, wherein the object-side surface of the positive lens is a convex surface, and the image-side surface of the positive lens is a concave surface; the object side surface of the negative lens is a convex surface, and the image side surface of the negative lens is a concave surface.
6. The infrared distance-increasing lens of the infrared three-proofing mobile phone according to claim 1, wherein the total length of the optical path of the infrared distance-increasing lens is less than or equal to 13.6mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222739710.9U CN218601563U (en) | 2022-10-18 | 2022-10-18 | Infrared range-increasing lens of infrared three-proofing mobile phone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222739710.9U CN218601563U (en) | 2022-10-18 | 2022-10-18 | Infrared range-increasing lens of infrared three-proofing mobile phone |
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| CN218601563U true CN218601563U (en) | 2023-03-10 |
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