Fresnel pattern lens for PIR induction camera
By designing arc-shaped condenser patterns on the Fresnel lens of the PIR sensing camera and dividing them into multiple condenser areas, the problems of limitations in the detection range and insufficient distance of traditional lenses are solved, and detection at a longer distance and larger angles are achieved Test area and higher sensitivity.
Patent Information
- Application Number
- CN202421047851.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The traditional Fresnel human infrared sensing lenses of existing PIR sensing cameras have problems such as limitations in detection range and insufficient maximum detection distance, which cannot meet the market's demand for the extension of detection distance, expansion of monitoring area and enhanced sensitivity.
A Fresnel pattern lens for PIR induction camera was designed, using arc-shaped condenser patterns and divided into upper, middle and lower concentrating areas, and multiple symmetrical condenser sheets were set up in each area, which increased the The detection area of the lens.
Through this design, the detection area and detection distance of the lens are effectively increased, the detection sensitivity is improved, and the market needs for longer distances and larger angles are met.
Smart Images
Figure CN222167259U_ABST
Abstract
Description
Technical Field
[0001] The utility model lens relates to the technical field of Fresnel lenses, in particular to a Fresnel pattern lens for a PIR sensing camera. Background Art
[0002] Fresnel human infrared sensing lens is an indispensable key component in smart home devices such as induction lighting systems and PIR motion sensing cameras. It is responsible for accurately focusing the infrared radiation emitted by the human body in the environment onto the corresponding sensor surface. In this way, whether it is an induction light or a PIR motion sensing device, it can rely on the lens focusing function to capture the infrared light accompanying the movement of the human body, and activate and capture images accordingly.
[0003] Currently, consumers have increasing expectations for the infrared human body detection performance of such smart products, especially in terms of extending the detection distance, expanding the monitoring area, and enhancing the detection sensitivity. However, the reality is that the traditional Fresnel infrared human body sensing lenses used in many current PIR sensing cameras generally have problems with limited detection range and insufficient maximum detection distance in actual applications, which to some extent limits their ability to meet the growing market demand.
[0004] Therefore, it is necessary to study a Fresnel lens for PIR sensing cameras with a longer detection distance, a larger detection angle, and a higher detection sensitivity. Utility Model Content
[0005] In view of the above-mentioned deficiencies existing in the prior art, the utility model provides a Fresnel pattern lens for a PIR sensing camera, which is used to solve the problems of limited detection range and insufficient maximum detection distance in the prior art.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] A Fresnel pattern lens for a PIR sensing camera comprises: a lens, an arc-shaped focusing mirror pattern and a groove;
[0008] The arc-shaped focusing mirror pattern is arranged on the lens, and the arc-shaped focusing mirror pattern is provided with an upper first focusing area, a middle second focusing area and a lower third focusing area;
[0009] The outer edge of the lens is arranged in a circumferential direction, and a groove is provided in the center thereof.
[0010] Furthermore, the lens is a curved lens.
[0011] Furthermore, the upper first light focusing area, the middle second light focusing area, and the lower third light focusing area are arranged in parallel from top to bottom.
[0012] Furthermore, a fourth light-concentrating sheet is arranged in the middle of the first light-concentrating area of the upper layer, and a third light-concentrating sheet, a second light-concentrating sheet and a first light-concentrating sheet are symmetrically arranged on both sides of the fourth light-concentrating sheet.
[0013] Furthermore, the first light concentrator has a width dimension of 4.55 mm ± 0.5 mm and a height dimension of 10.2 mm ± 0.5 mm;
[0014] The width dimension of the second focusing sheet is 3.55mm±0.5mm, and the height dimension is 10.2mm±0.5mm; the width dimension of the third focusing sheet is 3.04mm±0.5mm, and the height dimension is 10.2mm±0.5mm; the width dimension of the fourth focusing sheet is 3.04mm±0.5mm, and the height dimension is 10.2mm±0.5mm.
[0015] Furthermore, there is a seventh light concentrator in the middle of the second light concentrator area in the middle layer, and a sixth light concentrator and a fifth light concentrator are symmetrically arranged on both sides of the seventh light concentrator.
[0016] Furthermore, the fifth light concentrator has a width dimension of 6.07 mm ± 0.5 mm and a height dimension of 4.55 mm ± 0.5 mm;
[0017] The width dimension of the sixth concentrator is 5.58 mm ± 0.5 mm, and the height dimension is 4.55 mm ± 0.5 mm; the width dimension of the seventh concentrator is 5.07 mm ± 0.5 mm, and the height dimension is 4.55 mm ± 0.5 mm.
[0018] Furthermore, a ninth light focusing sheet is arranged in the middle of the third light focusing area of the lower layer, and the eighth light focusing sheets are symmetrically arranged on both sides of the ninth light focusing sheet.
[0019] Furthermore, the eighth light concentrator has a width dimension of 8.29 mm ± 0.5 mm and a height dimension of 3.12 mm ± 0.5 mm;
[0020] The ninth light concentrator has a width dimension of 5.68 mm±0.5 mm and a height dimension of 3.12 mm±0.5 mm.
[0021] Compared with the prior art, the utility model has the following beneficial effects:
[0022] The utility model discloses a Fresnel pattern lens for a PIR sensing camera, which can effectively increase the detection area of the lens by arranging an upper first light focusing area, a middle second light focusing area, and a lower third light focusing area in parallel from top to bottom on an arc-shaped light focusing mirror pattern, and dividing the upper first light focusing area, the middle second light focusing area, and the lower third light focusing area into a plurality of light focusing sheets respectively. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0024] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;
[0025] Figure 3 It is a side view structural schematic diagram of the utility model;
[0026] Figure 4 It is a horizontal test range diagram of the detection area of the utility model;
[0027] Figure 5 This is a vertical detection range diagram of the detection area of the utility model.
[0028] The reference numerals involved in the accompanying drawings are:
[0029] 1. Lens; 2. Arc-shaped focusing mirror pattern; 3. Groove; 4. The first focusing area of the upper layer; 5. The second focusing area of the middle layer; 6. The third focusing area of the lower layer; 11. The first focusing sheet; 12. The second focusing sheet; 13. The third focusing sheet; 14. The fourth focusing sheet; 15. The fifth focusing sheet; 16. The sixth focusing sheet; 17. The seventh focusing sheet; 18. The eighth focusing sheet; 19. The ninth focusing sheet. DETAILED DESCRIPTION
[0030] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0031] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.
[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0033] See also Figures 1 to 5 As shown, a Fresnel pattern lens for a PIR sensing camera comprises: a lens 1, an arc-shaped focusing mirror pattern 2 and a groove 3. Specifically, the lens 1 is an arc-shaped lens.
[0034] The arc-shaped focusing mirror pattern 2 is arranged on the lens 1, and the arc-shaped focusing mirror pattern 2 is provided with an upper first focusing area 4, a middle second focusing area 5 and a lower third focusing area 6. Specifically, the upper first focusing area 4, the middle second focusing area 5 and the lower third focusing area 6 are arranged in parallel from top to bottom. It can be understood that the upper first focusing area 4, the middle second focusing area 5 and the lower third focusing area 6 arranged in parallel from top to bottom can increase the vertical detection range of the lens detection area.
[0035] A fourth light concentrator 14 is arranged in the middle of the upper first light concentrator area 4, and a third light concentrator 13, a second light concentrator 12, and a first light concentrator 11 are symmetrically arranged on both sides of the fourth light concentrator 14. Specifically, the width dimension of the first light concentrator 11 is 4.55 mm ± 0.5 mm, and the height dimension is 10.2 mm ± 0.5 mm; the width dimension of the second light concentrator 12 is 3.55 mm ± 0.5 mm, and the height dimension is 10.2 mm ± 0.5 mm; the width dimension of the third light concentrator 13 is 3.04 mm ± 0.5 mm, and the height dimension is 10.2 mm ± 0.5 mm; the width dimension of the fourth light concentrator 14 is 3.04 mm ± 0.5 mm, and the height dimension is 10.2 mm ± 0.5 mm.
[0036] The seventh concentrator 17 is disposed in the middle of the middle second concentrator area 5, and the sixth concentrator 16 and the fifth concentrator 15 are symmetrically arranged on both sides of the seventh concentrator 17. Specifically, the width of the fifth concentrator 15 is 6.07 mm ± 0.5 mm, and the height is 4.55 mm ± 0.5 mm; the width of the sixth concentrator 16 is 5.58 mm ± 0.5 mm, and the height is 4.55 mm ± 0.5 mm; the width of the seventh concentrator 17 is 5.07 mm ± 0.5 mm, and the height is 4.55 mm ± 0.5 mm.
[0037] A ninth light focusing sheet 19 is arranged in the middle of the third light focusing area 6 of the lower layer, and the eighth light focusing sheets 18 are symmetrically arranged on both sides of the ninth light focusing sheet 19. Specifically, the width dimension of the eighth light focusing sheet 18 is 8.29mm±0.5mm, and the height dimension is 3.12mm±0.5mm; the width dimension of the ninth light focusing sheet 19 is 5.68mm±0.5mm, and the height dimension is 3.12mm±0.5mm. It can be understood that by dividing the upper first light focusing area 4, the middle second light focusing area 5, and the lower third light focusing area 6 on the arc lens into a plurality of symmetrically arranged light-gathering sheets, the horizontal test range of the lens detection area can be effectively increased.
[0038] The outer edge of the lens 1 is arranged in a circumferential direction, and a groove 3 is provided in the center thereof.
[0039] The above is only an embodiment of the utility model. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.
Claims
1. A Fresnel lens for a PIR sensor camera, characterized in that: include: A lens (1), an arc-shaped focusing mirror pattern (2) and a groove (3); The arc-shaped focusing mirror pattern (2) is arranged on the lens (1), and the arc-shaped focusing mirror pattern (2) is provided with an upper first focusing area (4), a middle second focusing area (5) and a lower third focusing area (6); The outer edge of the lens (1) is arranged in a circular direction, and a groove (3) is provided in the center thereof.
2. The Fresnel lens for a PIR sensor camera according to claim 1, characterized in that: The lens (1) is a curved lens.
3. The Fresnel lens for a PIR sensor camera according to claim 1, characterized in that: The upper first light focusing area (4), the middle second light focusing area (5), and the lower third light focusing area (6) are arranged in parallel from top to bottom.
4. The Fresnel lens for a PIR sensing camera according to claim 3, characterized in that: A fourth light concentrator (14) is arranged in the middle of the upper first light concentrator area (4), and a third light concentrator (13), a second light concentrator (12), and a first light concentrator (11) are symmetrically arranged on both sides of the fourth light concentrator (14).
5. The Fresnel lens for a PIR sensor camera according to claim 4, characterized in that: The first light-collecting sheet (11) has a width dimension of 4.55 mm ± 0.5 mm and a height dimension of 10.2 mm ± 0.5 mm; the second light-collecting sheet (12) has a width dimension of 3.55 mm ± 0.5 mm and a height dimension of 10.2 mm ± 0.5 mm; the third light-collecting sheet (13) has a width dimension of 3.04 mm ± 0.5 mm and a height dimension of 10.2 mm ± 0.5 mm; the fourth light-collecting sheet (14) has a width dimension of 3.04 mm ± 0.5 mm and a height dimension of 10.2 mm ± 0.5 mm.
6. The Fresnel lens for a PIR sensor camera according to claim 3, characterized in that: A seventh light concentrator (17) is provided in the middle of the middle-layer second light concentrator zone (5), and a sixth light concentrator (16) and a fifth light concentrator (15) are symmetrically arranged on both sides of the seventh light concentrator (17).
7. The Fresnel lens for a PIR sensor camera according to claim 6, characterized in that: The fifth concentrator (15) has a width dimension of 6.07 mm ± 0.5 mm and a height dimension of 4.55 mm ± 0.5 mm; the sixth concentrator (16) has a width dimension of 5.58 mm ± 0.5 mm and a height dimension of 4.55 mm ± 0.5 mm; the seventh concentrator (17) has a width dimension of 5.07 mm ± 0.5 mm and a height dimension of 4.55 mm ± 0.5 mm.
8. The Fresnel lens for a PIR sensor camera according to claim 3, characterized in that: A ninth light focusing plate (19) is arranged in the middle of the third light focusing area (6) of the lower layer, and eighth light focusing plates (18) are symmetrically arranged on both sides of the ninth light focusing plate (19).
9. The Fresnel lens for a PIR sensor camera according to claim 8, characterized in that: The eighth light concentrator (18) has a width dimension of 8.29 mm ± 0.5 mm and a height dimension of 3.12 mm ± 0.5 mm; the ninth light concentrator (19) has a width dimension of 5.68 mm ± 0.5 mm and a height dimension of 3.12 mm ± 0.5 mm.