CN211553063U - Infrared light detecting head - Google Patents
Infrared light detecting head Download PDFInfo
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- CN211553063U CN211553063U CN202020375442.5U CN202020375442U CN211553063U CN 211553063 U CN211553063 U CN 211553063U CN 202020375442 U CN202020375442 U CN 202020375442U CN 211553063 U CN211553063 U CN 211553063U
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Abstract
The utility model provides an infrared detecting head, it includes: the detector comprises a detector head shell, an infrared filter, a wide-angle short-focus lens group and a photosensitive unit; a detection window for incidence of infrared light is arranged at one end of the shell of the detection head, the detection window is communicated with the interior of the shell of the detection head, and the infrared filter, the wide-angle short-focus lens group and the photosensitive unit are sequentially arranged in the shell of the detection head along the incidence direction of the infrared light; the short burnt lens group of wide angle includes first lens and the second lens that sets gradually along the incident direction of infrared light, and photosensitive element includes: the substrate, photosensitive surface paster and pad, photosensitive surface paster are located the one side of substrate, and the pad is connected with photosensitive surface paster. The utility model discloses an infrared detecting head utilizes wide angle, short focal's optical lens group, with free space's jumbo size facula, reduces the optical imaging size to photosensitive unit through little photosurface receives. And by reducing the size of the photosensitive surface, the light scattering is avoided, and the detection precision is improved.
Description
Technical Field
The utility model relates to an infrared detection technology field especially relates to an infrared detecting head.
Background
As shown in fig. 1, the conventional large-photosurface optical power detection product utilizes a filter plate 1 and a large photosurface 2, and finally encapsulates the filter plate 1 and the large photosurface 2 into an integral device through an encapsulation shell 3 to perform free-space large-light-spot optical power detection. However, the large-photosensitive-surface optical power detection product with the structure has the defects of difficult manufacturing and low preparation yield. In addition, the large photosurface array is expensive, the process difficulty for manufacturing the large photosurface is high, the production yield is low, and the cost is high. Therefore, there is a need to provide further solutions to the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an infrared detecting head to overcome the not enough that exists among the prior art.
In order to solve the technical problem, the technical scheme of the utility model is that:
an infrared light detection head, comprising: the detector comprises a detector head shell, an infrared filter, a wide-angle short-focus lens group and a photosensitive unit;
a detection window for incidence of infrared light is arranged at one end of the detection head shell, the detection window is communicated with the interior of the detection head shell, and the infrared optical filter, the wide-angle short-focus lens group and the photosensitive unit are sequentially arranged in the interior of the detection head shell along the incidence direction of the infrared light;
the short burnt battery of lens of wide angle includes first lens and the second lens that sets gradually along the incident direction of infrared light, photosensitive unit includes: base plate, photosurface paster and pad, the photosurface paster is located the one side of base plate, just the photosurface paster is located infrared filter and wide angle short focus lens group's light path, the pad with the photosurface paster is connected, the size range of photosurface paster is at 100 ~ 900 μm.
As the improvement of the infrared light detecting head of the utility model, the infrared light filter is suitable for the infrared light of 800-1700 nm wave band to pass through.
As the utility model discloses an improvement of infrared detecting head, first lens towards infrared filter's one side is kept away from the sunken setting of infrared filter, first lens towards the one side of second lens is kept away from the sunken setting of second lens, just first lens towards the radius of the one side of second lens is less than first lens towards the radius of infrared filter's one side.
As an improvement of the infrared light detecting head of the present invention, the second lens is a biconvex lens.
As the utility model discloses an improvement of infrared detecting head, the pad includes: the polarity P bonding pad and the polarity N bonding pad are respectively connected with the photosensitive surface patch through leads.
As the utility model discloses an improvement of infrared detecting head, the photosensitive unit still includes: and the mounting identification mark is positioned on one surface of the substrate.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an infrared detecting head utilizes wide angle, short focal's optical lens group, with free space's jumbo size facula, reduces the optical imaging size to photosensitive unit through little photosurface receives. And by reducing the size of the photosensitive surface, the light scattering is avoided, and the detection precision is improved. In addition, the photosensitive surface patch and the routing packaging mode are adopted, so that the process is simplified, and the manufacturing cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a conventional large-photosurface optical power detection product;
fig. 2 is a schematic structural diagram of an embodiment of the infrared light detection head of the present invention;
FIG. 3 is an enlarged plan view of the photosensitive unit of FIG. 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 2, an embodiment of the present invention provides an infrared detector, which includes: a detector head housing 10, an infrared filter 20, a wide-angle short-focus lens group 30 and a photosensitive unit 40.
The detection head shell 10 is provided with a detection window for incidence of infrared light at one end, the detection window is communicated with the interior of the detection head shell 10, and the infrared filter 20, the wide-angle short-focus lens group 30 and the photosensitive unit 40 are packaged in the interior of the detection head shell 10. In order to match the incidence of the infrared light, the infrared filter 20, the wide-angle short-focus lens group 30 and the photosensitive unit 40 are sequentially disposed inside the probe head housing 10 along the incidence direction of the infrared light.
The infrared filter 20 is suitable for infrared light of 800-1700 nm wave bands to pass through so as to block light of other wave bands, and filters an input spectrum, so that non-detection stray light is prevented from interfering with a test result, detection precision of the infrared detector head is improved, and the infrared detector head is protected.
The wide-angle short-focus lens group 30 is used for reducing the optical imaging size of a large-size spot in a free space, and includes a first lens 31 and a second lens 32 which are sequentially arranged along the incident direction of infrared light. In one embodiment, the first lens 31 is a biconcave lens, the surface of the biconcave lens facing the infrared filter 20 is recessed away from the infrared filter 20, the surface of the first lens 31 facing the second lens 32 is recessed away from the second lens 32, and the radius of the surface of the first lens 31 facing the second lens 32 is smaller than the radius of the surface of the first lens 31 facing the infrared filter 20. The second lens 32 is a biconvex lens, and optical surfaces on both sides of the biconvex lens are symmetrically arranged in a protruding manner.
Therefore, after the light beam input from the detection window passes through the infrared filter 20, the large light spot is effectively reduced in detection imaging size through the wide-angle short-focus lens group 30, and finally the light power of the light beam is converged to the photosensitive unit 40, so that the performance of the infrared light detector is remarkably improved.
The light sensing unit 40 is a PhotoDetector (photo detector), and the structure of the light sensing surface and the bonding pad thereof is designed in this embodiment, and does not involve the improvement of the circuit part.
Specifically, as shown in fig. 3, the photosensitive unit 40 includes: a substrate 41, a photosurface patch 42 and a pad 43. Wherein, the photosurface patch 42 is located on one side of the substrate 41, and the photosurface patch 42 is located on the optical path of the infrared filter 20 and the wide-angle short-focus lens group 30 to receive the reduced light spot. The bonding pads 43 are connected to the photosurface patch 42. In order to adapt to the reduced light spot, the size of the photosensitive surface patch 42 is reduced and designed, and the size range is 100-900 μm.
Further, the pad 43 includes: polarity P pad 431 and polarity N pad 432, polarity P pad 431 and polarity N pad 432 are connected with photosurface patch 42 through a gold wire bonding process respectively. Meanwhile, in order to facilitate mounting of the photosurface patch 42, the photosensing unit 40 further includes: and a mounting identifier 44, wherein the mounting identifier 44 is located on one surface of the substrate 41. In one embodiment, the mounting identification mark 44 is two + marks provided on the surface thereof. Therefore, the photosensitive surface patch 42 and the routing packaging mode are adopted, so that the process is simplified, and the manufacturing cost is reduced.
To sum up, the utility model discloses an infrared detecting head utilizes the optical lens group of wide angle, short focal length, with free space's jumbo size facula, reduces optical imaging size to photosensitive unit through little photosurface receives. And by reducing the size of the photosensitive surface, the light scattering is avoided, and the detection precision is improved. In addition, the photosensitive surface patch and the routing packaging mode are adopted, so that the process is simplified, and the manufacturing cost is reduced.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. An infrared light detecting head, comprising: the detector comprises a detector head shell, an infrared filter, a wide-angle short-focus lens group and a photosensitive unit;
a detection window for incidence of infrared light is arranged at one end of the detection head shell, the detection window is communicated with the interior of the detection head shell, and the infrared optical filter, the wide-angle short-focus lens group and the photosensitive unit are sequentially arranged in the interior of the detection head shell along the incidence direction of the infrared light;
the short burnt battery of lens of wide angle includes first lens and the second lens that sets gradually along the incident direction of infrared light, photosensitive unit includes: base plate, photosurface paster and pad, the photosurface paster is located the one side of base plate, just the photosurface paster is located infrared filter and wide angle short focus lens group's light path, the pad with the photosurface paster is connected, the size range of photosurface paster is at 100 ~ 900 μm.
2. The infrared light detecting head as claimed in claim 1, wherein the infrared filter is adapted to pass infrared light in a wavelength range of 800-1700 nm.
3. The ir detecting head according to claim 1, wherein a surface of the first lens facing the ir filter is recessed away from the ir filter, a surface of the first lens facing the second lens is recessed away from the second lens, and a radius of a surface of the first lens facing the second lens is smaller than a radius of a surface of the first lens facing the ir filter.
4. The infrared light probe head of claim 1 or 3, wherein the second lens is a biconvex lens.
5. The infrared light detector head of claim 1, wherein the bonding pads comprise: the polarity P bonding pad and the polarity N bonding pad are respectively connected with the photosensitive surface patch through leads.
6. The infrared light detector head of claim 1, wherein the photosensitive unit further comprises: and the mounting identification mark is positioned on one surface of the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020375442.5U CN211553063U (en) | 2020-03-23 | 2020-03-23 | Infrared light detecting head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020375442.5U CN211553063U (en) | 2020-03-23 | 2020-03-23 | Infrared light detecting head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211553063U true CN211553063U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020375442.5U Active CN211553063U (en) | 2020-03-23 | 2020-03-23 | Infrared light detecting head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211553063U (en) |
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2020
- 2020-03-23 CN CN202020375442.5U patent/CN211553063U/en active Active
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Address after: No. 168 Jiaotong North Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: Suzhou Zhuoyu Photon Technology Co.,Ltd. Address before: 215000 building 12, No. 88, Hengtong Road, Songling Town, Wujiang District, Suzhou City, Jiangsu Province Patentee before: HENGTONG ROCKLEY TECHNOLOGY Co.,Ltd. |