CN210376739U - Fresnel-pattern-based lens for short distance - Google Patents
Fresnel-pattern-based lens for short distance Download PDFInfo
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- CN210376739U CN210376739U CN201921208168.6U CN201921208168U CN210376739U CN 210376739 U CN210376739 U CN 210376739U CN 201921208168 U CN201921208168 U CN 201921208168U CN 210376739 U CN210376739 U CN 210376739U
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Abstract
The utility model relates to the technical field of lenses, concretely relates to lens for closely using based on fresnel pattern, including the mirror body of semicircle shape, set up in the spotlight unit that the mirror body is used for spotlight, spotlight unit includes first spotlight area, second spotlight area and third spotlight area in proper order, first spotlight area is close to in the mirror body plane, first spotlight area sets up first spotlight piece, second spotlight area is provided with a plurality of groups of second spotlight pieces, third spotlight area is provided with a plurality of groups of third spotlight pieces, second spotlight piece includes the first spotlight portion of a plurality of groups and the second spotlight portion that is located the first spotlight portion of both sides, first spotlight piece, second spotlight piece and third spotlight piece all are provided with fresnel pattern; the utility model provides a current lens apart from long and be not suitable for apartment type house environment, adopted the restriction of listening of minim, listen the scope in three meters, be applicable to intelligent doorbell etc. that domestic apartment pattern is leading, place indoor or outdoor, reduce long distance misstatement, overall structure good reliability.
Description
Technical Field
The utility model relates to a lens technical field especially relates to a closely use lens based on fei nieer line.
Background
The Fresnel human body infrared sensing lens is an essential accessory for the display function of intelligent household products such as cameras and cameras; the infrared light collecting device has the function of collecting infrared light emitted by an external human body, and then focusing the infrared light on the surface of the sensor, so that intelligent household products such as a camera and a camera can detect the infrared light emitted by the human body when the human body moves, and accordingly, the intelligent household products are started and capture images.
Nowadays, people require more and more accuracy to the human infrared detection of above-mentioned product because the promotion of living standard, and the improvement of precision means that lens can acquire more distant, the angle is bigger, the more accurate infrared light of scope. However, the conventional lenses in the market are generally long and far away due to technical problems, and in the application of the domestic intelligent doorbell mainly in the form of an apartment, the too long detection distance causes the trouble of the user, so that the performance of the intelligent doorbell cannot meet the requirements of people.
In the prior art, chinese patent application No. CN201820707242.8 discloses a fresnel lens, which solves the technical problems: the infrared light in a larger angle range can be collected by arranging the first light gathering area, the second light gathering area and the third light gathering area; the first light gathering area is provided with a plurality of first light gathering sheets for gathering infrared light at a longer distance. However, in practical use, the lens is not suitable for use in apartment houses with high housing density, and particularly, false alarm is easy to occur in the range.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a solve the problem that current lens can not adapt to the use, adopted the restriction of listening of minim, listen the scope at three meters, be applicable to intelligent doorbell etc. place indoor or outdoor, reduce long distance misstatement, overall structure strong reliability's closely use lens based on fresnel pattern.
The utility model adopts the technical proposal that: a near distance lens based on Fresnel patterns comprises a semi-circular lens body, a light-gathering unit arranged on the lens body for gathering light, the light-gathering unit comprises a first light-gathering area, a second light-gathering area and a third light-gathering area in sequence, the first light-gathering area is close to the flat surface of the mirror body, the first light gathering area is provided with at least two groups of symmetrical first light gathering sheets, the second light gathering area is positioned at the lower side of the first light gathering area and is provided with a plurality of groups of second light gathering sheets, the third light gathering area is positioned below the second light gathering area, the second light condensation sheet comprises a plurality of groups of first light condensation parts and second light condensation parts positioned on the first light condensation parts at two sides, the second light condensation parts are symmetrically arranged at two sides of the first light condensation parts, and the size of the second light condensation part is larger than that of the first light condensation part, and the first light condensation sheet, the second light condensation sheet and the third light condensation sheet are all provided with Fresnel patterns.
The further improvement of the scheme is that the mirror body and the light gathering unit are integrally formed.
The mirror body is characterized in that the edge of the mirror body is provided with a frame, and the upper end and the lower end of the frame are provided with clamping grooves for installation.
The further improvement of the scheme is that the first condensation area is provided with two groups of symmetrical first condensation sheets, and the two groups of first condensation sheets are symmetrically arranged in a wing shape.
The further improvement of the scheme is that the first light gathering parts are provided with three groups, the three groups of the first light gathering parts are arranged in a transverse array mode, and the second light gathering parts are symmetrically arranged on two sides of the three groups of the first light gathering parts.
In a further improvement of the above aspect, the second light condensing portion is larger in size than the first light condensing sheet and the second light condensing sheet.
The scheme is further improved in that the third light condensation area is provided with five groups of third light condensation sheets, and the five groups of third light condensation sheets are uniformly and symmetrically arranged.
The scheme is further improved in that the width dimension of the first light-gathering sheet is 18-20 mm, and the height dimension of the first light-gathering sheet is 2.5-3.2 mm; the width dimension of the first light-gathering part is 2.5-4.0 mm, and the height dimension is 10-12 mm; the width dimension of the second light condensation part is 13-15 mm, and the height dimension of the second light condensation part is 10-12 mm; the width dimension of the third polaroid is 2.5-8.0 mm, and the height dimension is 4.0-5.2 mm.
The utility model has the advantages that:
the lens body is arranged, and the semi-circular lens body is adopted, so that the installation and the use are convenient, the detection and the use of close-range signals are facilitated, and the practicability and the reliability are realized; a light-gathering unit is integrally formed on the mirror body, and infrared light of a human body is focused on the sensor through the light-gathering unit so as to expand the sensing area, thereby prolonging and expanding the signal sensing range; the light condensation unit comprises a first light condensation area, a second light condensation area and a third light condensation area which are sequentially arranged from top to bottom, the sensing range is expanded by the first light condensation area to the upper part of the light condensation unit, signals are expanded to the front and two sides of the light condensation unit through the second light condensation area, so that the sensing range and the sensing effect are enhanced, the extension and expansion of the signals are enhanced through the third light condensation area, and the sensing effect and the sensing range are further enhanced; the first light-gathering area is provided with two groups of symmetrical first light-gathering sheets, and the two groups of symmetrical first light-gathering sheets can ensure that the collected human infrared light is more uniform, so that the detection range is enhanced; the second condensation area is provided with a plurality of groups of second condensation sheets, and particularly, a plurality of groups of second condensation sheets are adopted to realize a large-range detection effect, so that the detection range of signal collection is enhanced; the second light condensation sheet comprises a first light condensation part and a second light condensation part, and particularly the second light condensation parts are arranged on two sides of the first light condensation part and are symmetrically arranged, so that the signal collection range is more uniform, the range is larger, and the reliability is stronger; the first light-gathering sheet, the second light-gathering sheet and the third light-gathering sheet are all provided with Fresnel patterns, and the Fresnel patterns are designed according to the principle of the invention of the French photophysics FRESNEL, and can collect and focus remote human infrared light onto the sensor so as to achieve the effect of signal amplification.
The utility model discloses in, solved the problem that current lens is not suitable for the use, adopted the restriction of listening of minim, the scope of listening is in three meters, is applicable to intelligent doorbell etc. reduces long distance misstatement, overall structure good reliability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: the lens 100, the lens body 110, the frame 111, the card slot 112, the light focusing unit 120, the first light focusing area 130, the first light focusing sheet 131, the second light focusing area 140, the second light focusing sheet 141, the third light focusing area 150, the first light focusing portion 142, the second light focusing portion 143, and the third light focusing sheet 151.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, a fresnel-pattern-based short-distance lens 100 includes a semi-circular lens 110, and a light-gathering unit 120 disposed on the lens 110 for gathering light, wherein the light-gathering unit 120 includes a first light-gathering area 130, a second light-gathering area 140, and a third light-gathering area 150 in sequence, the first light-gathering area 130 is close to the plane of the lens 110, the first light-gathering area 130 is provided with at least two sets of symmetrical first light-gathering sheets 131, the second light-gathering area 140 is disposed under the first light-gathering area 130 and is provided with a plurality of sets of second light-gathering sheets 141, the third light-gathering area 150 is disposed under the second light-gathering area 140 and is provided with a plurality of sets of third light-gathering sheets 151, the second light-gathering sheets 141 include a plurality of sets of first light-gathering portions 142 and second light-gathering portions 143 disposed on two sides of the first light-gathering portions 142, the second light-gathering portions 143 are symmetrically disposed on two sides of the first light, the first light-gathering sheet 131, the second light-gathering sheet 141 and the third light-gathering sheet 151 are all provided with fresnel patterns.
The mirror body 110 and the light condensing unit 120 are integrally formed, and are of an integrally formed structure, so that the structural strength is high, and the service life can be ensured.
The edge of the mirror body 110 is provided with a frame 111, the upper end and the lower end of the frame 111 are provided with clamping grooves 112 for installation, and the frame 111 and the clamping grooves 112 are arranged so as to be assembled and fixed for use, thereby ensuring the stability and the detection effect of installation.
The first light gathering area 130 is provided with two sets of symmetrical first light gathering pieces 131, and the first light gathering pieces 131 are symmetrically arranged in a wing shape, so that the detection range of signals is effectively limited, and the phenomenon of false alarm caused by overlarge signal detection range is prevented.
The first light-gathering parts 142 are provided with three groups, the first light-gathering parts 142 are arranged in a transverse array mode, the second light-gathering parts 143 are symmetrically arranged on two sides of the three groups of the first light-gathering parts 142, a multi-group array structure is adopted to conduct expanding detection aiming at the right front side, signals on two sides are expanded through the second light-gathering parts 143, and therefore the range, stability and reliability of overall detection are guaranteed.
The size of the second light focusing part 143 is larger than the first light focusing sheet 131 and the second light focusing sheet 141, the size of the second light focusing part 143 is set to be the largest, the detection range can be expanded towards two sides, the upper part and the lower part can be changed, the detection effect is good, and the signal expansion effect is good.
The third condensing area 150 is provided with five groups of third condensing sheets 151, the five groups of third condensing sheets 151 are uniformly and symmetrically arranged, and the current detection range is performed within a certain range by adopting uniform and symmetrical arrangement, so that the detection effect and the expansion range are ensured.
The first light-gathering sheet 131 has a width dimension of 18 to 20mm and a height dimension of 2.5 to 3.2 mm; the width dimension of the first light-gathering part 142 is 2.5-4.0 mm, and the height dimension is 10-12 mm; the width dimension of the second light condensation part 143 is 13-15 mm, and the height dimension is 10-12 mm; the third polaroid 151 is 2.5-8.0 mm in width and 4.0-5.2 mm in height.
The lens body 110 is arranged, and the semicircular lens body 110 is adopted, so that the lens is convenient to install and use, is beneficial to short-distance signal detection and use, and is practical and reliable; the light condensing unit 120 is integrally formed on the mirror body 110, and the light condensing unit 120 expands the detection range of the human infrared light which can be absorbed by the sensor, so that the signal sensing range is extended and expanded; specifically, the light condensing unit 120 includes a first light condensing region 130, a second light condensing region 140 and a third light condensing region 150 which are sequentially arranged from top to bottom, the sensing range is expanded by the signal collected from the first light condensing region 130 to the upper part, the sensing range is expanded to the front and the two sides by the second light condensing region 140, so that the sensing range and the effect are enhanced, the extension and the expansion of the signal are further enhanced by the third light condensing region 150, and the sensing effect and the sensing range are further enhanced; the first light gathering area 130 is provided with two groups of symmetrical first light gathering sheets 131, and the two groups of symmetrical first light gathering sheets 131 can ensure that the induction detection range is expanded more uniformly, so that the detection range is enhanced; the second condensing region 140 is provided with a plurality of groups of second condensing sheets 141, and particularly, a plurality of groups of second condensing sheets 141 are adopted to realize large-scale signal expansion, so that the signal detection range is enhanced, and the third condensing region 150 is provided with a plurality of groups of third condensing sheets 151, which also have the function of expanding the detection signal range; the second light focusing sheet 141 comprises a first light focusing part 142 and a second light focusing part 143, specifically, the second light focusing part 143 is arranged on two sides of the first light focusing part 142 and symmetrically arranged, so that the detection sensing range is more uniform, the range is larger, and the reliability is stronger; the first light-gathering sheet 131, the second light-gathering sheet 141 and the third light-gathering sheet 151 are all provided with FRESNEL patterns, and the FRESNEL patterns are designed according to the principle of the FRESNEL invention of french photophysics, and can collect and focus far infrared light of a human body onto a sensor so as to achieve the effect of signal amplification.
The utility model discloses in, solved current lens and be not adapted to installing the problem at the apartment type house that the population intensity is high, adopted the restriction of listening of minim, listen the scope at three meters, be applicable to intelligent doorbell etc. and place, reduce long distance misstatement, overall structure good reliability.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A lens for near-distance based on Fresnel patterns is characterized in that: the lens body that includes the semicircle shape sets up in the spotlight unit that the lens body is used for the spotlight, spotlight unit includes first spotlight district, second spotlight district and third spotlight district in proper order, first spotlight district is close to the lens body plane, first spotlight district sets up the first spotlight piece of at least two sets of symmetries, second spotlight district is located first spotlight district downside, it is provided with a plurality of groups second spotlight piece, third spotlight district is located second spotlight district below, and it is provided with a plurality of groups third spotlight piece, the second spotlight piece includes the first spotlight portion of a plurality of groups and the second spotlight portion that is located the first spotlight portion in both sides, second spotlight portion symmetry sets up in first spotlight portion both sides, and second spotlight portion size is greater than first spotlight portion, first spotlight piece, second spotlight piece and third spotlight piece all are provided with fresnel's line.
2. The Fresnel-pattern-based near field lens as set forth in claim 1, wherein: the mirror body and the light gathering unit are integrally formed.
3. The Fresnel-pattern-based near field lens as set forth in claim 1, wherein: the edge of the mirror body is provided with a frame, and the upper end and the lower end of the frame are provided with clamping grooves for installation.
4. The Fresnel-pattern-based near field lens as set forth in claim 1, wherein: the first condensation area is provided with two groups of symmetrical first condensation sheets, and the two groups of first condensation sheets are symmetrically arranged in a wing shape.
5. The Fresnel-pattern-based near field lens as set forth in claim 1, wherein: the first light gathering parts are arranged in three groups, the first light gathering parts are arranged in a transverse array, and the second light gathering parts are symmetrically arranged on two sides of the first light gathering parts in the three groups.
6. The Fresnel-pattern-based near field lens as set forth in claim 1, wherein: the second light condensation part is larger than the first light condensation sheet and the second light condensation sheet in size.
7. The Fresnel-pattern-based near field lens as set forth in claim 1, wherein: the third light condensation area is provided with five groups of third light condensation sheets, and the five groups of third light condensation sheets are uniformly and symmetrically arranged.
8. The Fresnel-pattern-based near field lens as set forth in claim 1, wherein: the width dimension of the first light-gathering sheet is 18-20 mm, and the height dimension of the first light-gathering sheet is 2.5-3.2 mm; the width dimension of the first light-gathering part is 2.5-4.0 mm, and the height dimension is 10-12 mm; the width dimension of the second light condensation part is 13-15 mm, and the height dimension of the second light condensation part is 10-12 mm; the width dimension of the third polaroid is 2.5-8.0 mm, and the height dimension is 4.0-5.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921208168.6U CN210376739U (en) | 2019-07-29 | 2019-07-29 | Fresnel-pattern-based lens for short distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921208168.6U CN210376739U (en) | 2019-07-29 | 2019-07-29 | Fresnel-pattern-based lens for short distance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210376739U true CN210376739U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921208168.6U Active CN210376739U (en) | 2019-07-29 | 2019-07-29 | Fresnel-pattern-based lens for short distance |
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| Country | Link |
|---|---|
| CN (1) | CN210376739U (en) |
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2019
- 2019-07-29 CN CN201921208168.6U patent/CN210376739U/en active Active
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