CN209311771U - A kind of Miniature projection lens - Google Patents
A kind of Miniature projection lens Download PDFInfo
- Publication number
- CN209311771U CN209311771U CN201822254655.8U CN201822254655U CN209311771U CN 209311771 U CN209311771 U CN 209311771U CN 201822254655 U CN201822254655 U CN 201822254655U CN 209311771 U CN209311771 U CN 209311771U
- Authority
- CN
- China
- Prior art keywords
- eyeglass
- focal length
- lens
- projection lens
- miniature projection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Lenses (AREA)
Abstract
This application discloses a kind of Miniature projection lens, comprising: first group's lens with positive focal length, diaphragm, second group's lens with positive focal length, light-splitting device protect glass and imaging surface；The focal length of first group lens is 17.2 < f12 < 27, and the focal length of second group lens is 102.6 < f13 < 111.8.A kind of Miniature projection lens disclosed in the present application, can be effectively solved existing Miniature projection lens cannot project large scale picture in limited distance, not be easily assembled, the technical problem that image quality is not high and the easy race of projection lens is burnt.
Description
Technical field
This application involves projection lens technical field more particularly to a kind of Miniature projection lens.
Background technique
Projection lens is the core component of projection device: light needs after reflective or penetration light changing device
By being imaged in projection lens projects to projection screen.
As role is increasing in life for projection device, the field being applied to also can be more and more.More
Equipment need to be embedded in micro-projection device, this requirement to projection lens is also higher and higher, and smaller, structure is more stepped up
It gathers, imaging effect is more preferable, and the lower projection lens of cost becomes mainstream.
Existing projection lens on the market, transmittance is generally 1.0 or more, and field angle is at 60 ° or so, and most of mirror
Head is compact-sized in order to pursue, and will use less eyeglass, and when requiring more high imaging quality, the correction of pixel is unsatisfactory,
And the last one eyeglass is finally set in the aspherical use of plastic cement, therefore can bring defect below: 1, it is limited away from
Large scale picture cannot be projected from interior, field angle is less than normal；2, finer picture cannot be projected；3, to the concentricity of camera lens, with
And the assembling tolerance of each eyeglass is higher, is not easily assembled；4, the setting of plastic cement camera lens can be heated in last one side because of plastic cement
It is excessive and to cause camera lens to run burnt.
Utility model content
This application discloses a kind of Miniature projection lens, and can be effectively solved existing Miniature projection lens is having range line
From it is interior cannot project large scale picture, be not easily assembled, image quality is not high and projection lens is easy to run burnt technical problem.
This application provides a kind of Miniature projection lens, the camera lens includes: to have just from amplification end to end is reduced successively
First group's lens of focal length, diaphragm, second group's lens with positive focal length, light-splitting device protect glass and imaging surface；Institute
The focal length for stating first group's lens is 17.2 < f12 < 27, and the focal length of second group lens is 102.6 < f13 < 111.8.
Preferably, first group lens successively include the first eyeglass, the second eyeglass, third eyeglass, the 4th eyeglass,
Five eyeglasses and the 6th eyeglass.
Preferably, first eyeglass is the selenodont plastic aspheric lens with negative focal length；Second eyeglass is
Platycelous glass lens with negative focal length；The third eyeglass is the double concave type glass lens with negative focal length；Described 4th
Eyeglass is with the lenticular lens for positive focal length；5th eyeglass is the selenodont lens with positive focal length；Described 6th
Eyeglass is the selenodont lens with positive focal length.
Preferably, two surfaces of first eyeglass are aspherical；Two surfaces of second eyeglass are ball
Face；Two surfaces of the third eyeglass are spherical surface；Two surfaces of the 4th eyeglass are spherical surface；5th eyeglass
Two surfaces be spherical surface；Two surfaces of the 6th eyeglass are spherical surface.
Preferably, the focal length of first eyeglass is -35.6 < f1 < -32.9；The focal length of second eyeglass be -44.8 <
f2<-42.9；The focal length of the third eyeglass is -13.5 < f3 < -12.1；The focal length of 4th eyeglass is 22.5 < f4 < 24.8；
The focal length of 5th eyeglass is 53.3 < f5 < 54.1；The focal length of 6th eyeglass is 35.3 < f6 < 35.9.
Preferably, second group lens successively include the 7th eyeglass, the 8th eyeglass, the 9th eyeglass, the tenth eyeglass and
11st eyeglass.
Preferably, the 7th eyeglass is the planoconvex glass lens with positive focal length；8th eyeglass is with negative
The double concave type glass lens of focal length；9th lens are the biconvex glass lens with positive focal length；Tenth lens are
Lenticular lens with positive focal length；11st eyeglass is the selenodont glass lens with positive focal length.
Preferably, two surfaces of the 7th eyeglass are spherical surface；Two surfaces of the 8th eyeglass are spherical surface；
Two surfaces of the 9th eyeglass are spherical surface；Two surfaces of the tenth eyeglass are spherical surface；11st eyeglass
Two surfaces be spherical surface.
Preferably, the focal length of the 7th eyeglass is 20.3 < f7 < 22.2；The focal length of 8th eyeglass be -9.3 < f8 < -
8.1；The focal length of 9th eyeglass is 25.8 < f9 < 27.4；The focal length of tenth eyeglass is 29.1 < f10 < 29.5；Described
The focal length of 11 eyeglasses is 36.7 < f11 < 40.8.
As can be seen from the above technical solutions, the embodiment of the present application has the advantage that
This application provides a kind of Miniature projection lens, camera lens successively includes: with positive focal length from amplification end to end is reduced
First group's lens, diaphragm, second group's lens with positive focal length, light-splitting device protects glass and imaging surface；Described
The focal length of one group's lens is 17.2 < f12 < 27, and the focal length of second group lens is 102.6 < f13 < 111.8.The application
A kind of Miniature projection lens are disclosed, can effectively improve existing Miniature projection lens cannot project in limited distance
Large scale picture is not easily assembled, the technical problem that image quality is not high and the easy race of projection lens is burnt.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of optical structure chart of the Miniature projection lens provided in the embodiment of the present application；
Fig. 2 is a kind of each visual field transmission function mtf value of the Miniature projection lens provided in the embodiment of the present application；
Fig. 3 is the curvature of field and distortion figure of a kind of Miniature projection lens provided in the embodiment of the present application；
Fig. 4 is a kind of chromatic curve figure of the Miniature projection lens provided in the embodiment of the present application.
Specific embodiment
This application discloses a kind of Miniature projection lens, are able to satisfy again while improving relative aperture value by optical design
Image quality has greatly improved to brightness.
Fig. 1 is a kind of optical structure chart of the Miniature projection lens provided in the embodiment of the present application；This application provides one
Kind Miniature projection lens, the camera lens successively include: first group's lens, a light with positive focal length from amplification end to end is reduced
Door screen, second group's lens, light-splitting device, protection a glass, imaging surface with positive focal length；First group's lens include first
Eyeglass, the selenodont lens with negative focal length；Second eyeglass, the platycelous lens with negative focal length；Third eyeglass has negative coke
Away from double concave type lens；4th eyeglass, the lenticular lens with positive focal length；5th eyeglass, the selenodont with positive focal length are saturating
Mirror；6th eyeglass, the selenodont lens with positive focal length；Second group's lens include the 7th eyeglass, the plano-convex with positive focal length
Type lens；8th eyeglass, the lenticular lens with negative focal length；9th eyeglass, the lenticular lens with positive focal length；Tenth mirror
Piece, the lenticular lens with positive focal length；11st eyeglass, the selenodont lens with positive focal length.
Particularly, the last one eyeglass of the Miniature projection lens is glass lens, can efficiently solve micro projection
Camera lens causes camera lens to run burnt defect since plastic cement aspherical lens are heated.The camera lens have projection than it is big, be easily assembled and at
The high feature of image quality amount.
The Miniature projection lens use negative lens P1, negative lens G2, negative lens G3, positive lens G4, positive lens G5, positive lens
G6, the aperture of the diaphragm, positive lens G7, negative lens G8, positive lens G9, positive lens G10 and positive lens G11 are successively from amplification end to diminution
The mode of arrangement is realized:
First eyeglass P1 be using made by plastic material with negative power selenodont lens, and two surface S1,
S2 is non-spherical surface；The focal length of first eyeglass meets -35.6 < f1- < -32.9, and refractive index meets 1.4 < Nd1 < 1.6.
Second eyeglass G2, using having negative power platycelous lens made by glass material, and two surfaces S3, S4 are equal
For spherical face；The focal length of second eyeglass meets -44.8 < f2 < -42.9, and refractive index meets 1.4 < Nd2 < 1.6.
Third eyeglass G3 has negative power double concave type saturating using made by glass material, and two surfaces S5, S6 are
Spherical face；The focal length of third eyeglass meets -13.5 < f3 < -12.1, and refractive index meets 1.8 < Nd3 < 1.9.
4th eyeglass G4, using having positive light coke lenticular lens made by glass material, and two surfaces S6, S7 are equal
For spherical face；The focal length of 4th eyeglass meets 22.5 < f4 < 24.8, and refractive index meets 1.7 < Nd4 < 1.8.
5th eyeglass G5, using having positive light coke selenodont lens made by glass material, and two surfaces S8, S9 are equal
For spherical face；The focal length of 5th eyeglass meets 53.3 < f5 < 54.1, and refractive index meets 1.8 < Nd5 < 1.9.
6th eyeglass G6, using having positive light coke selenodont lens, and two surfaces S10, S11 made by glass material
It is spherical face；The focal length of 6th eyeglass meets 35.3 < f6 < 35.9, and refractive index meets 1.7 < Nd6 < 1.8.
7th eyeglass G7, using having positive light coke plane-convex lens made by glass material, convex surface is towards imaging end, and two
A surface S13, S14 are spherical face；Focal length satisfaction 20.3 < f7 < 22.2 of 7th eyeglass, 1.5 < Nd7 of refractive index satisfaction <
1.6。
8th eyeglass G8, using having negative power double concave type lens, and two surfaces S14, S15 made by glass material
It is spherical face；The focal length of 8th eyeglass meets -9.3 < f8 < -8.1, and refractive index meets 1.7 < Nd8 < 1.8.
9th eyeglass G9, using having positive light coke lenticular lens, and two surfaces S15, S16 made by glass material
It is spherical face；The focal length of 9th eyeglass meets 25.8 < f9 < 27.4, and refractive index meets 1.4 < Nd9 < 1.5.
Tenth eyeglass G10, using made by glass material have positive light coke lenticular lens, and two surface S17,
S18 is spherical face；The focal length of tenth eyeglass meets 29.1 < f10 < 29.5, and refractive index meets 1.7 < Nd10 < 1.8.
11st eyeglass G11, using made by glass material have positive light coke selenodont lens, and two surface S19,
S20 is spherical face；The focal length of 11st eyeglass meets 36.7 < f11 < 40.8, and refractive index meets 1.8 < Nd11 < 1.9.
The focal length of first group's lens meets: 17.2 < f12 < 27, and second group's focal length of lens meets: 102.6 < f13 <
111.8。
It is provided by the embodiments of the present application miniature for the technical purpose for reaching the optical property for effectively promoting Miniature projection lens
The design parameter of projection lens such as table one；Wherein parameter includes the thickness of each eyeglass, spacing, the refractive index Nd of each eyeglass
Radius of curvature R (the Radius of of (Refractive index), Abbe number Vd (Abbe number) and each eyeglass
curvature)。
Table one
It is wherein aspherical, surface S1, S2 of aspherical selenodont lens P1, by aspherical formula ability there are two surface
Obtain the corresponding curve of spherical surface；Aspherical formula is following formula:
Wherein: Z indicate aspherical on point from aspheric vertex of surface with a distance from optical axis direction；R indicates the point on non-surface
To the distance of optical axis；C indicates aspherical curvature of centre；K indicates rate of taper；Indicate aspherical high-order coefficient.
Each level number of non-spherical lens P1, as shown in Table 2.
Table two
The present embodiment meets the following conditions: effective focal length=10.3mm, F/#=1.7, offset=100%, projector distance
When for 900~3000mm, projection size being 40~135 and projection ratio is 1.0.
The embodiment of the present application has all used cemented doublet, the glued mirror in the first lens group in the first, second lens group
Piece can preferably improve distortion, the curvature of field, can also alleviate to design big project than and P1 eyeglass is optimized to obtain very convex feelings
Condition, so that P1 eyeglass is easier to process and controls cost；Three cemented doublets of the second lens group are effectively reduced transparent surface, are promoted
Efficiency, moreover it is possible to preferably control color difference, guarantee image quality.
According to the Miniature projection lens that the design parameter of above-mentioned each lens obtains, as shown in optical system Fig. 2.By Fig. 2
It is found that full filed optical transfer function MTF > 50% under 93lp/mm spatial frequency.From the figure 3, it may be seen that the curvature of field -0.05~+
In 0.05 range, aberration control is within 1%；As shown in Figure 4, which corrects color difference twice, second order spectrum 2.2
μm, chromatic aberration correction is more satisfactory.
It can be seen that, the Miniature projection lens of the application are designed using telecentric optical system in summary, embody the camera lens ruler
Very little small, compact-sized, at low cost and high imaging quality.
A kind of Miniature projection lens provided by the embodiment of the present application are described in detail above, for this field
Those skilled in the art, according to the thought of the embodiment of the present application, there will be changes in the specific implementation manner and application range,
In conclusion the contents of this specification should not be construed as limiting the present application.
Claims (9)
1. a kind of Miniature projection lens, which is characterized in that the camera lens successively includes: with positive focal length from amplification end to end is reduced
First group's lens, diaphragm, second group's lens with positive focal length, light-splitting device protects glass and imaging surface；Described
The focal length of one group's lens is 17.2 < f12 < 27, and the focal length of second group lens is 102.6 < f13 < 111.8.
2. a kind of Miniature projection lens according to claim 1, which is characterized in that first group lens successively include
First eyeglass, the second eyeglass, third eyeglass, the 4th eyeglass, the 5th eyeglass and the 6th eyeglass.
3. a kind of Miniature projection lens according to claim 2, which is characterized in that first eyeglass is with negative focal length
Selenodont plastic aspheric lens；Second eyeglass is the platycelous glass lens with negative focal length；The third eyeglass
For the double concave type glass lens with negative focal length；4th eyeglass is with the lenticular lens for positive focal length；Described 5th
Eyeglass is the selenodont lens with positive focal length；6th eyeglass is the selenodont lens with positive focal length.
4. a kind of Miniature projection lens according to claim 3, which is characterized in that two surfaces of first eyeglass are equal
It is aspherical；Two surfaces of second eyeglass are spherical surface；Two surfaces of the third eyeglass are spherical surface；Described
Two surfaces of four eyeglasses are spherical surface；Two surfaces of the 5th eyeglass are spherical surface；Two tables of the 6th eyeglass
Face is spherical surface.
5. a kind of Miniature projection lens according to claim 4, which is characterized in that the focal length of first eyeglass be-
35.6<f1<-32.9；The focal length of second eyeglass is -44.8 < f2 < -42.9；The focal length of the third eyeglass is -13.5 < f3
<-12.1；The focal length of 4th eyeglass is 22.5 < f4 < 24.8；The focal length of 5th eyeglass is 53.3 < f5 < 54.1；It is described
The focal length of 6th eyeglass is 35.3 < f6 < 35.9.
6. a kind of Miniature projection lens according to claim 1, which is characterized in that second group lens successively include
7th eyeglass, the 8th eyeglass, the 9th eyeglass, the tenth eyeglass and the 11st eyeglass.
7. a kind of Miniature projection lens according to claim 6, which is characterized in that the 7th eyeglass is with positive focal length
Planoconvex glass lens；8th eyeglass is the double concave type glass lens with negative focal length；9th eyeglass be with
The biconvex glass lens of positive focal length；Tenth eyeglass is the lenticular lens with positive focal length；11st eyeglass is
Selenodont glass lens with positive focal length.
8. a kind of Miniature projection lens according to claim 7, which is characterized in that two surfaces of the 7th eyeglass are equal
For spherical surface；Two surfaces of the 8th eyeglass are spherical surface；Two surfaces of the 9th eyeglass are spherical surface；Described tenth
Two surfaces of eyeglass are spherical surface；Two surfaces of the 11st eyeglass are spherical surface.
9. a kind of Miniature projection lens according to claim 8, which is characterized in that the focal length of the 7th eyeglass is 20.3
<f7<22.2；The focal length of 8th eyeglass is -9.3 < f8 < -8.1；The focal length of 9th eyeglass is 25.8 < f9 < 27.4；Institute
The focal length for stating the tenth eyeglass is 29.1 < f10 < 29.5；The focal length of 11st eyeglass is 36.7 < f11 < 40.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822254655.8U CN209311771U (en) | 2018-12-29 | 2018-12-29 | A kind of Miniature projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822254655.8U CN209311771U (en) | 2018-12-29 | 2018-12-29 | A kind of Miniature projection lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209311771U true CN209311771U (en) | 2019-08-27 |
Family
ID=67679934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822254655.8U Active CN209311771U (en) | 2018-12-29 | 2018-12-29 | A kind of Miniature projection lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209311771U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445075A (en) * | 2018-12-29 | 2019-03-08 | 深圳市点睛创视技术有限公司 | A kind of Miniature projection lens |
| CN112433342A (en) * | 2020-12-03 | 2021-03-02 | 四川长虹电器股份有限公司 | Ultra-high resolution miniature projection lens |
| CN114002821A (en) * | 2021-12-03 | 2022-02-01 | 江西晶超光学有限公司 | Optical lens, camera module, electronic equipment and automobile |
-
2018
- 2018-12-29 CN CN201822254655.8U patent/CN209311771U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445075A (en) * | 2018-12-29 | 2019-03-08 | 深圳市点睛创视技术有限公司 | A kind of Miniature projection lens |
| CN109445075B (en) * | 2018-12-29 | 2024-04-16 | 深圳市点睛创视技术有限公司 | Miniature projection lens |
| CN112433342A (en) * | 2020-12-03 | 2021-03-02 | 四川长虹电器股份有限公司 | Ultra-high resolution miniature projection lens |
| CN114002821A (en) * | 2021-12-03 | 2022-02-01 | 江西晶超光学有限公司 | Optical lens, camera module, electronic equipment and automobile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104360462B (en) | Wide-angle lens | |
| CN108267834B (en) | Fixed focus lens | |
| CN105700117B (en) | A kind of optical imaging system | |
| CN110515188A (en) | A kind of projection lens | |
| CN108333730A (en) | A kind of high definition ultra-wide angle day and night confocal camera lens | |
| CN209311771U (en) | A kind of Miniature projection lens | |
| CN109491053B (en) | Miniature projection lens | |
| CN105445908A (en) | High-image quality, large-image frame and small-distortion optical imaging system | |
| JP5650687B2 (en) | Zoom projection lens | |
| CN109445075A (en) | A kind of Miniature projection lens | |
| CN106324815A (en) | Zoom lens system and lens | |
| JP2013125057A (en) | Projection lens | |
| CN209311772U (en) | A kind of Miniature projection lens | |
| JP5801679B2 (en) | Projection lens system and projector apparatus | |
| CN103869449A (en) | Infrared confocal optical system | |
| CN212873039U (en) | Miniature projection lens and projection equipment | |
| CN110632741A (en) | Projection lens | |
| CN109407288A (en) | A kind of refraction-reflection type ultra-short focus projection lens system | |
| CN109445065A (en) | A kind of 10 group of 13 chip lens construction for d-cinema projectors | |
| CN108845417A (en) | One kind disappears parallax machine vision optical system | |
| CN108717227A (en) | A kind of bugeye lens | |
| CN205581383U (en) | High picture height is like matter optical imaging system | |
| CN208421383U (en) | The high pixel fish eye optical systems of ultra-wide angle and its camera module of application | |
| TWI412813B (en) | Zoom projection lens | |
| CN106094183A (en) | Focusing-style optical imaging system in a kind of high picture element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |