CN110187482A - Fatigue driving monitoring optical system and its camera module of application - Google Patents
Fatigue driving monitoring optical system and its camera module of application Download PDFInfo
- Publication number
- CN110187482A CN110187482A CN201910412293.7A CN201910412293A CN110187482A CN 110187482 A CN110187482 A CN 110187482A CN 201910412293 A CN201910412293 A CN 201910412293A CN 110187482 A CN110187482 A CN 110187482A
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- lens
- optical system
- object plane
- image planes
- fatigue driving
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- 230000003287 optical effect Effects 0.000 title claims abstract description 61
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 239000011521 glass Substances 0.000 claims description 6
- 230000007774 longterm Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 6
- 230000004075 alteration Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The embodiment of the invention discloses a kind of fatigue driving monitoring optical systems, successively include: the first lens, the second lens and the third lens from object plane to image planes along optical axis；The object plane side of first lens is concave surface, and image planes side is convex surface, and focal power is positive；The object plane side of second lens is concave surface, and image planes side is concave surface, and focal power is negative；The object plane side of the third lens is concave surface, and image planes side is convex surface, and focal power is positive.On the other hand, the embodiment of the invention also provides a kind of camera modules.The optical system and camera module of the embodiment of the present invention are mainly made of 3 pieces of lens, and structure is simple, have the advantages such as small in size, light weight and cost is low；Using the intercombination of different lens and reasonable distribution focal power, it is ensured that the long-term reliability of camera lens requires and its service life, has parsing power height, infrared high definition, high reliability and outstanding temperature characterisitic.
Description
Technical field:
The present invention relates to a kind of optical system and its camera module of application, especially a kind of fatigue driving monitoring optical system
System and its camera module of application.
Background technique:
Existing fatigue driving early warning optical system or mould group, generally existing structure is complicated, is unfavorable for long-term reliability and wants
It asks, the short problem of service life.
Summary of the invention:
To overcome existing fatigue driving early warning optical system or mould group, generally existing structure is complicated, is unfavorable for believing for a long time
Rely property requirement, the short problem of service life, on the one hand the embodiment of the present invention provides a kind of fatigue driving monitoring optical system.
A kind of fatigue driving monitoring optical system, along optical axis successively include: from object plane to image planes the first lens, second thoroughly
Mirror and the third lens；
The object plane side of first lens is concave surface, and image planes side is convex surface, and focal power is positive；
The object plane side of second lens is concave surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens is concave surface, and image planes side is convex surface, and focal power is positive.
On the other hand, the embodiment of the invention also provides a kind of camera modules.
A kind of camera module includes at least optical lens, is equipped with fatigue driving monitoring described above in optical lens
Optical system.
The optical system and camera module of the embodiment of the present invention are mainly made of 3 pieces of lens, and structure is simple, have volume
The small, advantages such as light weight and cost is low, can meet the use of 2 mega pixel chips, minimize tired monitoring and early warning system convenient for cooperation
System uses；Using the intercombination of different lens and reasonable distribution focal power, optimize camera lens aberration, it is ensured that the long-term reliability of camera lens
It is required that and its service life, there is parsing power high, infrared high definition, high reliability and outstanding temperature characterisitic (- 40 DEG C~+105
DEG C) etc. superperformances.
Detailed description of the invention:
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of optical system of the invention or camera module embodiment；
Fig. 2 is the MTF curve figure of optical system of the invention or camera module embodiment；
Fig. 3 is -40 DEG C of defocusing curve figures of optical system of the invention or camera module embodiment；
Fig. 4 is+105 DEG C of defocusing curve figures of optical system of the invention or camera module embodiment.
Specific embodiment:
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
When the embodiment of the present invention refers to the ordinal numbers such as " first ", " second ", unless based on context its express really it is suitable
The meaning of sequence, it should be understood that only play differentiation and be used.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As shown in Figure 1, a kind of fatigue driving monitoring optical system, successively includes: first saturating from object plane to image planes along optical axis
Mirror 1, the second lens 2 and the third lens 3.
The object plane side of first lens 1 is concave surface, and image planes side is convex surface, and focal power is positive；
The object plane side of second lens 2 is concave surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens 3 is concave surface, and image planes side is convex surface, and focal power is positive.
The optical system of the embodiment of the present invention is mainly made of 3 pieces of lens, and structure is simple, have it is small in size, light-weight,
The advantages such as at low cost can meet the use of 2 mega pixel chips, minimize tired monitoring early-warning system convenient for cooperation and use；It adopts
Be combined with each other with different lens and reasonable distribution focal power, optimize camera lens aberration, it is ensured that the long-term reliability of camera lens require and its
Service life has parsing power height, infrared high definition, high reliability and outstanding temperature characterisitic (- 40 DEG C~+105 DEG C) etc. good
Good performance.
Further, non-limiting as a kind of preferred embodiment of the invention, the focal length f2 of the second lens 2 and
Meet: ∣ f2 ∣>∣ f3 ∣ between the focal length f3 of three lens 3.Structure is simple, it is ensured that good optical property.
Still further, the focal length f2 of second lens 2 and non-limiting as a kind of preferred embodiment of the invention
Meet between the focal length f3 of three lens 3: 1 < ∣ f2/f3 ∣.Structure is simple, it is ensured that good optical property.
Further, non-limiting as a kind of preferred embodiment of the invention, the focal length f1 of the first lens 1 and
Meet between the focal length f2 of two lens 2: 1.5 < ∣ f1/f2 ∣.Structure is simple, it is ensured that good optical property.
Further, non-limiting as a kind of preferred embodiment of the invention, the focal length f1 of the first lens 1 with it is whole
Meet between the focal length f of a optical system: 1 < ∣ f/f1 ∣；The focal length f2 of second lens 2 and the focal length f of entire optical system are full
Sufficient the following conditions: 1 < ∣ f/f2 ∣.Structure is simple, it is ensured that good optical property.
Still further, non-limiting as a kind of preferred embodiment of the invention, the first lens 1, the third lens 3 are
Glass lens, the second lens 2 are glass aspheric lenses.By select Glass aspheric eyeglass, reasonable distribution lens powers,
Camera lens aberration is advanced optimized, guarantees good optical property.
Further, non-limiting as a kind of preferred embodiment of the invention, along optical axis from object plane side to image planes
Meet between the thickness value D2 of second lens 2 of side and the thickness value D1 of the first lens 1: D2:D1=1:4~5.Structure is simple,
It can guarantee good optical property.
Further, non-limiting, the Refractive Index of Material of the first lens as a kind of preferred embodiment of the invention
Nd1, material Abbe constant Vd1 meet: 1.75 < Nd1, Vd1 < 55.Structure is simple, it is ensured that good optical property.
Still further, non-limiting, the Refractive Index of Material of the second lens as a kind of preferred embodiment of the invention
Nd2, material Abbe constant Vd2 meet: 1.45 < Nd2 < 1.75,25 < Vd2 < 90.Structure is simple, it is ensured that good optical
Energy.
Further, non-limiting, the Refractive Index of Material of the third lens as a kind of preferred embodiment of the invention
Nd3, material Abbe constant Vd3 meet: 1.75 < Nd3, Vd3 < 55.Structure is simple, it is ensured that good optical property.
Further, non-limiting as a kind of preferred embodiment of the invention, the diaphragm of optical system is located at the
Between one lens and the second lens.For adjusting the intensity of light beam.
Still further, the horizontal direction view of optical system non-limiting as a kind of preferred embodiment of the invention
Rink corner HFOV meets: 40 ° of 60 ° of < HFOV <.Structure is simple, it is ensured that good optical property.
Further, non-limiting, the optics overall length TTL of optical system as a kind of preferred embodiment of the invention
Meet: 7mm < TTL < 12mm.Structure is simple, it is ensured that good optical property.
Specifically, non-limiting, the optical system of the embodiment of the present invention as a kind of preferred embodiment of the invention,
Focal length f=4.66mm, stop index F/NO=2.2, HFOV=54.2 ° of horizontal direction field angle, optics overall length TTL=
Every basic parameter of 9.90mm, this optical system are as shown in the table:
| Surface | Radius of curvature R (mm) | Interval D (mm) | Refractive index Nd | Dispersion values Vd |
| S1 | -21.79 | 1.83 | 2.01 | 28.32 |
| S2 | -5.54 | -0.05 | ||
| STO | It is infinitely great | 0.40 | ||
| S4 | -61.12 | 0.45 | 1.52 | 64.05 |
| S5 | 2.23 | 0.39 | ||
| S6 | -24.66 | 1.14 | 2.00 | 28.32 |
| S7 | -3.03 | 0.30 | ||
| IMA | It is infinitely great |
In upper table, along optical axis 5 from object plane to image planes, S1, S2 correspond to two surfaces of the first lens 1；STO is diaphragm；
S4, S5 correspond to two surfaces of the second lens 2；S6, S7 correspond to two surfaces of the third lens 3；IMA is image planes 6.
Further, non-limiting as a kind of preferred embodiment of the invention, the surface of the second lens 2 is aspheric
Face shape, meets following equation:
Wherein, parameter c=1/R, as curvature corresponding to radius, y are radial coordinate, unit and length of lens unit
Identical, k is circular cone whose conic coefficient, a1To a8Coefficient corresponding to respectively each radial coordinate.The S4 of second lens 2
The aspherical correlation values on surface and the surface S5 are as shown in the table:
As can be seen that the optical system of the present embodiment has, parsing power is high, temperature characterisitic is outstanding, Gao Ke in from Fig. 2 to Fig. 4
By excellent performances such as property.
A kind of camera module includes at least optical lens, is equipped with fatigue driving monitoring described above in optical lens
Optical system.
The camera module of the embodiment of the present invention is mainly made of 3 pieces of lens, and structure is simple, have it is small in size, light-weight,
The advantages such as at low cost can meet the use of 2 mega pixel chips, minimize tired monitoring early-warning system convenient for cooperation and use；It adopts
Be combined with each other with different lens and reasonable distribution focal power, optimize camera lens aberration, it is ensured that the long-term reliability of camera lens require and its
Service life has parsing power height, infrared high definition, high reliability and outstanding temperature characterisitic (- 40 DEG C~+105 DEG C) etc. good
Good performance.
It is the one or more embodiments provided in conjunction with particular content as described above, does not assert specific reality of the invention
It applies and is only limited to these instructions.It is all approximate with method of the invention, structure etc., identical, or for present inventive concept under the premise of
Several technology deduction or replace are made, all should be considered as protection scope of the present invention.
Claims (8)
1. a kind of fatigue driving monitoring optical system, along optical axis successively include: from object plane to image planes the first lens, the second lens,
And the third lens；It is characterized in that,
The object plane side of first lens is concave surface, and image planes side is convex surface, and focal power is positive；
The object plane side of second lens is concave surface, and image planes side is concave surface, and focal power is negative；
The object plane side of the third lens is concave surface, and image planes side is convex surface, and focal power is positive.
2. fatigue driving monitoring optical system as described in claim 1, which is characterized in that the focal length f2 and third of the second lens
Meet: ∣ f2 ∣>∣ f3 ∣ between the focal length f3 of lens.
3. fatigue driving monitoring optical system as described in claim 1, which is characterized in that the focal length f2 and third of the second lens
Meet between the focal length f3 of lens: 1 < ∣ f2/f3 ∣.
4. fatigue driving monitoring optical system as described in claim 1, which is characterized in that the focal length f1 of the first lens and second
Meet between the focal length f2 of lens: 1.5 < ∣ f1/f2 ∣.
5. fatigue driving monitoring optical system as described in claim 1, which is characterized in that the focal length f1 of the first lens and entire
Meet between the focal length f of optical system: 1 < ∣ f/f1 ∣；And/or second lens focal length f2 and entire optical system focal length f
Meet the following conditions: 1 < ∣ f/f2 ∣.
6. fatigue driving monitoring optical system as described in claim 1, which is characterized in that the first lens, the third lens are glass
Glass lens, the second lens are glass aspheric lenses.
7. fatigue driving monitoring optical system as described in claim 1, which is characterized in that along optical axis from object plane side to image planes side
The thickness value D2 of the second lens and the thickness value D1 of the first lens between meet: D2:D1=1:4~5.
8. a kind of camera module includes at least optical lens, which is characterized in that be equipped with claim 1-7 in optical lens and appoint
Fatigue driving monitoring optical system described in one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412293.7A CN110187482B (en) | 2019-05-17 | 2019-05-17 | Fatigue driving monitoring optical system and camera module applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412293.7A CN110187482B (en) | 2019-05-17 | 2019-05-17 | Fatigue driving monitoring optical system and camera module applying same |
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| Publication Number | Publication Date |
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| CN110187482A true CN110187482A (en) | 2019-08-30 |
| CN110187482B CN110187482B (en) | 2024-06-21 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288166A (en) * | 1999-09-09 | 2001-03-21 | 恩普乐股份有限公司 | Lens for taking picture |
| US20050264671A1 (en) * | 2004-05-25 | 2005-12-01 | Masashi Isono | Image-taking optical system |
| US20080180814A1 (en) * | 2007-01-29 | 2008-07-31 | Takashi Kawasaki | Image pickup lens, image pickup apparatus and mobile terminal |
| CN102736214A (en) * | 2011-04-08 | 2012-10-17 | 大立光电股份有限公司 | Image capturing photographing lens assembly |
| CN204536638U (en) * | 2014-04-14 | 2015-08-05 | 康达智株式会社 | Pick-up lens |
| CN108279485A (en) * | 2018-03-09 | 2018-07-13 | 浙江舜宇光学有限公司 | Projection lens |
| CN209879124U (en) * | 2019-05-17 | 2019-12-31 | 广东弘景光电科技股份有限公司 | Fatigue driving monitoring optical system and camera module applied by same |
-
2019
- 2019-05-17 CN CN201910412293.7A patent/CN110187482B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288166A (en) * | 1999-09-09 | 2001-03-21 | 恩普乐股份有限公司 | Lens for taking picture |
| US20050264671A1 (en) * | 2004-05-25 | 2005-12-01 | Masashi Isono | Image-taking optical system |
| US20080180814A1 (en) * | 2007-01-29 | 2008-07-31 | Takashi Kawasaki | Image pickup lens, image pickup apparatus and mobile terminal |
| CN102736214A (en) * | 2011-04-08 | 2012-10-17 | 大立光电股份有限公司 | Image capturing photographing lens assembly |
| CN204536638U (en) * | 2014-04-14 | 2015-08-05 | 康达智株式会社 | Pick-up lens |
| CN108279485A (en) * | 2018-03-09 | 2018-07-13 | 浙江舜宇光学有限公司 | Projection lens |
| CN209879124U (en) * | 2019-05-17 | 2019-12-31 | 广东弘景光电科技股份有限公司 | Fatigue driving monitoring optical system and camera module applied by same |
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| Publication number | Publication date |
|---|---|
| CN110187482B (en) | 2024-06-21 |
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