阅读说明：本技术 一种五片式车载投影灯光学系统 (A kind of vehicle-mounted projection lamp optical system of five chips ) 是由 徐云明 于 2019-07-24 设计创作，主要内容包括：一种五片式车载投影灯光学系统,其包括用于输出影像的作为物方的投影底片,作为像方的投影区,透镜组,以及光阑。所述透镜组从像方到物方依次包括五个透镜,依次为负光焦度的第一透镜、正光焦度的第二透镜、正光焦度的第三透镜、负光焦度的第四透镜、正光焦度的第五透镜。所述第一透镜和所述第三透镜皆为非球面透镜。所述透镜组应当满足的关系式：1.2<f<f<Sub>3</Sub><32.5<f<Sub>3</Sub><f<Sub>2</Sub><6.5,其中：f为整个所述透镜组的焦距,f<Sub>2</Sub>为所述第二透镜的焦距,f<Sub>3</Sub>为所述第三透镜的焦距。所述五片式车载投影灯光学系统安装所述透镜组可在1m的距离可投影出未安装所述透镜组时3.5m的投影效果,增大了投影角度,使投影画面增加,便于使用者观赏。(The vehicle-mounted projection lamp optical system of a kind of five chips comprising for the autochrome as object space of image output, as the projected area of image space, lens group and diaphragm.The lens group successively includes five lens from image space to object space, is followed successively by the 5th lens of the first lens of negative power, the second lens of positive light coke, the third lens of positive light coke, the 4th lens of negative power, positive light coke.First lens and the third lens are all non-spherical lens.The relational expression that the lens group should meet: 1.2 < f < f 3 <32.5<f 3 <f 2 < 6.5, in which: f is the focal length of the entire lens group, f 2 For the focal length of second lens, f 3 For the focal length of the third lens.The vehicle-mounted projection lamp optical system of five chips, which installs the lens group, to be increased projection angle in the drop shadow effect of 3.5m when not installing the lens group out apart from projectable of 1m, increase projected picture, ornamental convenient for user.)

1. a kind of vehicle-mounted projection lamp optical system of five chips comprising one is used for the projection bottom as object space of image output Piece and a projected area as image space, it is characterised in that: the vehicle-mounted projection lamp optical system of five chips further includes one Lens group and a diaphragm being arranged in the lens group and for limiting imaging beam size size, the lens group Successively include five lens from image space to object space, be followed successively by one to light have disperse function and for negative power first thoroughly Mirror, one convergence effect and be positive to light with convergence effect and having for the second lens of positive light coke, one to light The third lens of focal power, one to light have disperse function and for negative power the 4th lens and one to light It with convergence effect and is the 5th lens of positive light coke, first lens and the third lens are all non-spherical lens, 4th lens and the 5th lens are glued together, the autochrome be arranged in five lens far from described the The side of four lens, the diaphragm are arranged between second lens and the third lens, and the lens group should meet Following relationship:

1.2<f<f₃<3 2.5<f₃<f₂<6.5

Wherein: f is the focal length of the entire lens group,

f₂For the focal length of second lens,

f₃For the focal length of the third lens.

2. the vehicle-mounted projection lamp optical system of five chips as described in claim 1, it is characterised in that: first lens, described Second lens, the third lens, the 4th lens and the 5th lens are all made of glass.

3. the vehicle-mounted projection lamp optical system of five chips as described in claim 1, it is characterised in that: the object side of first lens Face is concave surface, and image side surface is convex surface.

4. the vehicle-mounted projection lamp optical system of five chips as described in claim 1, it is characterised in that: the object side of second lens Face is convex surface, and image side surface is convex surface.

5. the vehicle-mounted projection lamp optical system of five chips as described in claim 1, it is characterised in that: the object side of the third lens Face is convex surface, image side surface convex surface.

6. the vehicle-mounted projection lamp optical system of five chips as described in claim 1, it is characterised in that: the object side of the 4th lens Face is concave surface, and the image side surface of the 4th lens is concave surface, and the object side of the 5th lens is convex surface, the 5th lens Image side surface is convex surface.

7. the vehicle-mounted projection lamp optical system of five chips as claimed in claim 6, it is characterised in that: the object side of the 4th lens The radian in face is identical as the radian of image side surface of the 5th lens.

8. the vehicle-mounted projection lamp optical system of five chips as described in claim 1, it is characterised in that: the vehicle-mounted projection of five chips Lamp optical system further includes the cover glass being arranged between the lens group and the autochrome, the cover glass setting Between the 5th lens and the autochrome.

9. the vehicle-mounted projection lamp optical system of five chips as described in claim 1, it is characterised in that: the focal length of first lens For -2.143mm, the focal length of second lens is 6.1mm, and the focal length of the third lens is 2.65mm, the 4th lens Focal length be -21.43mm, the focal lengths of the 5th lens is 15.23mm, and the 4th lens and the 5th lens are glued at Focal length together is 18.28mm, and the focal length of the entire lens group is 1.232mm, aperture FNO=2.2.

10. the vehicle-mounted projection lamp optical system of five chips as described in claim 1, it is characterised in that: the coke of first lens Away from for -2.255mm, the focal length of second lens is 5.831mm, and the focal length of the third lens is 2.780mm, the described 4th The focal length of lens is -44.54mm, and the focal length of the 5th lens is 21.037mm, the 4th lens and the 5th lens Focal length glued together is 14.076mm, and the focal length of the entire lens group is 1.245mm, aperture FNO=2.2.

Technical field

The invention belongs to optical technical fields, the especially a kind of vehicle-mounted projection lamp optical system of five chips.

Background technique

With the improvement of living standards, the quantity of motor vehicles is also more and more, every household has vehicle, people substantially The tool gone on a journey also gradually become automobile, the trip of automobile brings very big convenience to people's lives, not only saves Time of people alleviates the burden of people's trip.

Many drivers install vehicle-mounted projection lamp to increase car steering enjoyment on vehicle at present.Vehicle-mounted projection lamp Using LED light source, lens arrangement and autochrome are directly added, the optical system of entire projection lamp is formed, then projects Ground forms pattern.But the pattern that vehicle-mounted projection device projects formation in short distance is small, and the person of being not convenient to use is ornamental.

Summary of the invention

In view of this, the present invention provides a kind of vehicle-mounted projection lamp optical system of five chips that drop shadow effect can be enhanced, To meet industrial requirement.

The vehicle-mounted projection lamp optical system of a kind of five chips comprising one is used for the projection bottom as object space of image output Piece and a projected area as image space further include that a lens group and one are arranged in the lens group and are used for The diaphragm of limitation imaging beam size size.The lens group successively includes five lens from image space to object space, is followed successively by one To light with disperse function and be the first lens of negative power, one there is convergence effect and be positive light coke to light Second lens, one to light with convergence effect and for positive light coke the third lens, one to light have disperse function And be the 4th lens of negative power, one to light have convergence effect and be positive light coke the 5th lens.Described first Lens and the third lens are all non-spherical lens.4th lens and the 5th lens are glued together.The throwing Side of five lens far from the 4th lens is arranged in shadow egative film.Diaphragm setting is in second lens and described Between the third lens.The lens group should meet following relationship:

1.2<f<f₃<3 2.5<f₃<f₂<6.5

Wherein: f is the focal length of the entire lens group,

f₂For the focal length of second lens,

f₃For the focal length of the third lens.

Further, first lens, second lens, the third lens, the 4th lens and described 5th lens are all made of glass.

Further, the object side of first lens is concave surface, and image side surface is convex surface.

Further, the object side of second lens is convex surface, and image side surface is convex surface.

Further, the object side of the third lens is convex surface, image side surface convex surface.

Further, the object side of the 4th lens is concave surface, and the image side surfaces of the 4th lens is concave surface, described the The object side of five lens is convex surface, and the image side surface of the 5th lens is convex surface.

Further, the radian of the object side of the 4th lens is identical as the radian of image side surface of the 5th lens.

Further, the vehicle-mounted projection lamp optical system of five chip further include one setting the lens group with it is described Cover glass between autochrome, the cover glass are arranged between the 5th lens and the autochrome.

Further, the focal length of first lens is -2.143mm, and the focal length of second lens is 6.1mm, described The focal length of the third lens is 2.65mm, and the focal length of the 4th lens is -21.43mm, and the focal length of the 5th lens is 15.23mm, the 4th lens and the 5th lens focal length glued together are 18.28mm, the entire lens group Focal length is 1.232mm, aperture FNO=2.2.

Further, the focal length of first lens is -2.255mm, and the focal length of second lens is 5.831mm, institute The focal length for stating the third lens is 2.780mm, and the focal length of the 4th lens is -44.54mm, and the focal length of the 5th lens is 21.037mm, the 4th lens and the 5th lens focal length glued together are 14.076mm, the entire lens group Focal length be 1.245mm, aperture FNO=2.2.

Compared with prior art, the vehicle-mounted projection lamp optical system of five chip provided by the invention is by the lens group by institute The pattern for stating autochrome projects in view field.The lens group successively includes five lens from image space to object space, successively For one to light with disperse function and be the first lens of negative power, one to light have convergence effect and the light that is positive Second lens of focal power, one to light with convergence effect and for positive light coke the third lens, one to light have hair Dissipate effect and be the 4th lens of negative power, one to light with convergence effect and be positive light coke the 5th lens.Institute State the relational expression of lens satisfaction are as follows: 1.2 < f < f₃<3 2.5<f₃<f₂< 6.5, in which: f is the focal length of the entire lens group, f₂ For the focal length of second lens, f₃For the focal length of the third lens, so that the projection lamp for installing the lens group can be in 1m Projector distance between can be projected out the drop shadow effect of 3.5m when not installing the lens group, increase projection angle, make to throw Shadow picture increases, ornamental convenient for user.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the vehicle-mounted projection lamp optical system first embodiment of five chip provided by the invention.

Fig. 2 is the implementation structural schematic diagram of the vehicle-mounted projection lamp optical system of five chips of Fig. 1.

Fig. 3 is the curvature of field figure of the vehicle-mounted projection lamp optical system of five chips of Fig. 1.

Fig. 4 is the distortion figure of the vehicle-mounted projection lamp optical system of five chips of Fig. 1.

Fig. 5 is the magnification chromatic aberration diagram of the vehicle-mounted projection lamp optical system of five chips of Fig. 1.

Fig. 6 is the structural schematic diagram of the vehicle-mounted projection lamp optical system second embodiment of five chip provided by the invention.

Fig. 7 is the curvature of field figure of the vehicle-mounted projection lamp optical system of five chips of Fig. 6.

Fig. 8 is the distortion figure of the vehicle-mounted projection lamp optical system of five chips of Fig. 6.

Fig. 9 is the magnification chromatic aberration diagram of the vehicle-mounted projection lamp optical system of five chips of Fig. 6.

Specific embodiment

Specific embodiments of the present invention are further elaborated below.It should be understood that herein to the present invention The explanation of embodiment is not intended to limit the scope of protection of the present invention.

It as shown in Figure 1 to Figure 2, is the structural schematic diagram of the vehicle-mounted projection lamp optical system of five chip provided by the invention. The vehicle-mounted projection lamp optical system of five chips includes the autochrome 1 as object space for being used for image output, a work For the projected area 2 of image space, a lens group 10, one is arranged in the lens group 10 and for limiting imaging beam size The diaphragm 20 of size and a cover glass 30 being arranged between the lens group 10 and the autochrome 1.Described five The vehicle-mounted projection lamp optical system of chip further includes other some functional modules, such as organizes arrangement, electric component etc. should For technology known by those skilled in the art, no longer it is described in detail one by one herein.

The autochrome 1 is image output side, and light source passes through the autochrome 1 when use, by the autochrome 1 Pattern project in the lens group 10, the autochrome 1 be a kind of prior art, details are not described herein.

The projected area 2 is the region that the lens group 10 exports image, is a kind of prior art, no longer superfluous herein It states.

The lens group 10 successively includes five lens from image space to object space, and being followed successively by one has disperse function to light It and is that 11, one, the first lens of negative power have convergence effect to light and are 12, one, the second lens of positive light coke It with convergence effect and is that the third lens 13, one of positive light coke have disperse function to light and are negative power to light 14, one, the 4th lens there is convergence effect to light and be the 5th lens 15 of positive light coke.First lens, 11 He The third lens 13 are all non-spherical lens, and the 4th lens 14 and the 5th lens 15 are glued together, the throwing Side of five lens 15 far from the 4th lens 14 is arranged in shadow egative film 1, and the projected area 2 is in first lens 11 Backwards to the side of second lens 12.Light is successively from the 5th lens 15, the 4th lens 14, the third lens 13, second lens 12 and first lens 11 pass through, and are projected in the projected area 2.The lens group 10 relational expressions that should meet:

1.2<f<f₃<3 2.5<f₃<f₂<6.5

Wherein: f is the focal length of the entire lens group,

f₂For the focal length of second lens,

f₃For the focal length of the third lens.

Meet above-mentioned formula, can make projection lamp that the lens group 10 is installed described in not installing out apart from projectable for 1m The drop shadow effect of 3.5m, increases projection angle when lens group 10, increases projected picture, ornamental convenient for user.In addition, institute State the first lens 11, second lens 12, the third lens 13, the 4th lens 14 and the 5th lens 15 It is all made of glass, so that drop shadow effect stablizes in use, and the service life of lens can be increased.First lens 11 It is all non-spherical lens with the third lens 13, first lens 11 are used for for eliminating distortion, the third lens 13 Eliminate spherical aberration, coma and the aberration for influencing resolution ratio.And first lens 11 use aspheric with the third lens 13 Face lens reduce and are reduced and accounted for make entire product with compact structure using the quantity of lens in the entire lens group 10 With space, when installation, is convenient.In addition, the 4th lens 14 and the 5th lens 15 are glued together, a gluing is formed Eyeglass.4th lens 14 have higher refractive index with the 5th lens 15, i.e. incident light passes through the 4th lens 14 with five lens 15 when, the 4th lens 14 and the 5th lens 15 make incident light generation refracting power strong. And the ratio chromatism, that the 4th lens 14 are generated with the 5th lens 15 is cancelled out each other, thus the 4th lens 14 with 5th lens 15 can effectively eliminate ratio chromatism, when glued together.The object side of first lens 11 is concave surface, as Side is convex surface.The object side of second lens 12 is convex surface, and image side surface is convex surface.The object side of the third lens 13 is Convex surface, image side surface convex surface.The object side of 4th lens 14 is concave surface, and the image side surface of the 4th lens 14 is concave surface.Institute The object side for stating the 5th lens 15 is convex surface, and the image side surface of the 5th lens 15 is convex surface.The object side of 4th lens 14 The radian in face is identical as the radian of image side surface of the 5th lens 15, so that the 4th lens 14 and the 5th lens 15 It closely coincide together.In the first embodiment, the focal length of first lens 11 is -2.143mm, second lens 12 Focal length be 6.1mm, the focal lengths of the third lens 13 is 2.65mm, and the focal length of the 4th lens 14 is -21.43mm, institute The focal length for stating the 5th lens 15 is 15.23mm, and the 4th lens 14 and the 5th lens 15 focal length glued together are 18.28mm, the focal length of the entire lens group are 1.232mm, aperture FNO=2.2.

The lens group 10 also meets parameter required by table 1 and table 2

Table 1 is the physical parameter that lens group is each lens

Table 2 is that lens group is asphericity coefficient in lens

The face shape of non-spherical lens is determined by following formula

Aspherical formula

CURV is vertex curvature, and Y is aspherical upper any point to the height of optical axis, and K is conic constants, (A) Y²、(B)Y⁴、 (C)Y⁶... it is all asphericity coefficient, such as Coefficient on r^4=-0.0038396672 in table 2 in S1 and (B) Y⁴ Corresponding, Coefficient on r^6=0.00021563062 and (C) Y⁶It is corresponding, and so on.In aspherical formula Asphericity coefficient is with asphericity coefficient in table 2 without corresponding number, then the asphericity coefficient is 0.

The diaphragm 20 refers to the entity for playing restriction effect to light beam in optical system.The diaphragm 20 can be Edge, frame or the screen with holes being especially arranged of lens, effect can be divided to two aspects, limit light beam or limitation visual field size, For a kind of prior art.Diaphragm 20 described in the present embodiment is field stop or aperture diaphragm.The diaphragm 20 setting is described the Between two lens 12 and the third lens 13, it will be limited from the third lens 13 to the light beam of second lens 12 System.The diaphragm 20 helps to correct the curvature of field, astigmatism.

The cover glass 30 is arranged between the 5th lens 15 and the autochrome 1.The cover glass 30 is not only The cover glass 30 and the autochrome 1 are separated, the cover glass 30 also protects the autochrome 1.

Fig. 3 is the first curvature of field figure implemented.Fig. 4 is the first distortion figure implemented, and distortion figure shows the lens group 10 Distort very little, optical distortion < 10%, to reduce projected picture shape distortion.Fig. 5 is that the first magnification chromatic aberration diagram implemented can Find out that 10 ratio chromatism, of lens group is corrected, to eliminate projected picture cross-color.

Such as the structural schematic diagram that Fig. 6 is the second embodiment of the present invention comprising one is used as object for image output The autochrome 3 of side and a projected area 4 as image space, a lens group 40, one is arranged in the lens group 40 And for limiting the diaphragm 50 that beam size size is imaged and a setting in the lens group 40 and the autochrome 3 Between cover glass 60.The autochrome 3, projected area 4, the diaphragm 50 and the cover glass 60 are all implemented with first The autochrome 1, projected area 4, the diaphragm 20 and the cover glass 30 in example is identical, and details are not described herein.Institute Stating lens group 40 successively includes five lens from image space to object space, and being followed successively by one has disperse function and the light focus that is negative to light 41, one, the first lens of degree have convergence effect to light and have for 42, one, the second lens of positive light coke to light Convergence act on and be positive light coke the third lens 43, one to light with disperse function and be negative power the 4th lens 44, one has convergence effect to light and is the 5th lens 45 of positive light coke.First lens 41, the second lens 42, First lens 11, institute described in the third lens 43, the 4th lens 44, the formula met between the 5th lens 45 and first embodiment State the formula met between the second lens 12, the third lens 13, the 4th lens 14 and the 5th lens 15 It is identical.First lens 41 and the third lens 43 are all non-spherical lens, and the 4th lens 44 and the described 5th are saturating Mirror 45 is glued together.The object side of first lens 41 is concave surface, and image side surface is convex surface.The object of second lens 42 Side is convex surface, and image side surface is convex surface.The object side of the third lens 43 is convex surface, image side surface convex surface.4th lens 44 object side is concave surface, and the image side surface of the 4th lens 44 is convex surface.The object side of 5th lens 45 is convex surface, institute The image side surface for stating the 5th lens 45 is convex surface.The focal length of first lens 41 is -2.255mm, the coke of second lens 42 It is 2.780mm away from the focal length for 5.831mm, the third lens 43, the focal length of the 4th lens 44 is -44.54mm, described The focal length of 5th lens 45 is 21.037mm, and the 4th lens 44 and the 5th lens 45 focal length glued together are 14.076mm, the focal length of the entire lens group 40 are 1.245mm, aperture FNO=2.2.

The lens group 40 also meets parameter required by table 3 and table 4

Table 3 is the physical parameter that lens group is each lens

Table 4 is that lens group is asphericity coefficient in lens

Table 4 is identical as the formula that table 2 is met, and the uniform table 2 of the algorithm of formula is identical.

Fig. 7 is the second curvature of field figure implemented.Fig. 8 is the second distortion figure implemented.Fig. 9 is the second ratio chromatism, implemented Figure.Distortion figure shows the distortion of lens group 40 very little in Fig. 8, reduces projected picture shape distortion.The multiplying power color of Fig. 9 Poor figure can be seen that 40 ratio chromatism, of lens group is corrected, to eliminate projected picture cross-color.

Compared with prior art, the vehicle-mounted projection lamp optical system of five chip provided by the invention will by the lens group 10 The pattern of the autochrome 1 projects in view field 2.The lens group 10 successively includes five saturating from image space to object space Mirror, be followed successively by one there is convergence to make light to light with disperse function and for 11, one, the first lens of negative power With and be positive light coke 12, one, the second lens there is convergence effect to light and be positive light coke the third lens 13, one It is a that there is convergence effect and the light focus that is positive to light to light with disperse function and for 14, one, the 4th lens of negative power 5th lens 15 of degree.The relational expression that the lens 10 meet are as follows: 1.2 < f < f₃<3 2.5<f₃<f₂< 6.5, in which: f is entire The focal length of the lens group, f₂For the focal length of second lens, f₃For the focal length of the third lens, so that projection lamp is installed The lens group 10 can when the distance of 1m is projected out and does not install the lens group 10 3.5m drop shadow effect, increase projected angle Degree, increases projected picture, ornamental convenient for user.

The foregoing is merely a prefered embodiment of the invention, is not used to limitation protection scope of the present invention, any in the present invention Modification, equivalent replacement or improvement in spirit etc., all cover in scope of the presently claimed invention.