CN206757167U - A kind of telephoto lens - Google Patents
A kind of telephoto lens Download PDFInfo
- Publication number
- CN206757167U CN206757167U CN201720555258.7U CN201720555258U CN206757167U CN 206757167 U CN206757167 U CN 206757167U CN 201720555258 U CN201720555258 U CN 201720555258U CN 206757167 U CN206757167 U CN 206757167U
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- lens
- telephoto
- refracting power
- efl
- focal length
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Abstract
The utility model discloses a kind of telephoto lens, and focal length 200mm, CCD size use APS c-types, be successively preceding group of positive A including focal power by thing side to image side, iris diaphgram, focal power be rear group of negative C；Preceding group of A includes the first lens A 1 with positive refracting power, the second lens A 2 with positive refracting power, has the 3rd lens A 3 of negative refracting power, the 4th lens A 4 with positive refracting power；The first cemented doublet that C includes being touched by the 5th lens C 1 and the 6th lens C 2 with positive refracting power with negative refracting power, the second cemented doublet touched by the 7th lens C 3 with positive refracting power with the 8th lens C 4 with negative refracting power are organized afterwards.The utility model has the characteristics that compact result, low chromatic aberation, high-resolution, rear cut-off distance are long, and using the imaging sensor of APS C specifications, can produce the shooting effect of shallow depth of field high image quality.
Description
Technical field
The present invention relates to the telephoto lens that a kind of focal length is 200mm, belong to photoelectric imaging technology field.
Background technology
External information is imaged by human eye on the retina, and incoming brain is analyzed and handled by caused signal.
After computer occurs, the normal borrow of people carrys out the more preferable work for completing to analyze and process with computer, and outtake completes people
The function of eye.The analysis of this computer and combination of the combination of camera lens compared to human eye and brain have higher precision, wider array of
Receiving wave range, wider array of use range and longer service life, therefore in recent years in life, production etc. every field
Play very big effect.In this combination, the camera lens using high definition is the step of key one for obtaining high quality information.
Nowadays, in high definition camera lens, high definition telephoto lens obtains increasing professional user's favor, the resolution to camera lens
Rate, the requirement more and more higher of image quality, and most high-resolution telephoto lens is complicated now, microscope group number is more, optics overall length
Lens that are longer and having used aspherical grade not easy processing mostly, considerably increase production cost, the utility model employs more
Succinct structure is added to shorten optics overall length, and all using spherical lens, reaching reduces production cost takes into account with high image quality imaging
Purpose.
Utility model content
The utility model provides a kind of telephoto lens, and focal length 200mm, CCD size use APS-C types, it is simple for structure, into
As high-quality, and production cost is all reduced using spherical lens.
A kind of telephoto lens, focal length 200mm, CCD size use APS-C types, include light focus successively by thing side to image side
It is rear group of negative C to spend for preceding group of positive A, iris diaphgram, focal power；
Group A is included successively by thing side to image side before described：
The first lens A-1 with positive refracting power；
The second lens A-2 with positive refracting power, the thing side of the second lens is convex surface；
The 3rd lens A-3 with negative refracting power；
The 4th lens A-4 with positive refracting power, the thing side of the 4th lens is convex surface；
Group C is included successively by thing side to image side after described：
The first pair of glue touched by the 5th lens C-1 with negative refracting power with the 6th lens C-2 with positive refracting power
Close lens；
The second pair of glue touched by the 7th lens C-3 with positive refracting power with the 8th lens C-4 with negative refracting power
Close lens；Wherein, the 5th lens C-1 is located at the thing side of the first cemented doublet, and the 7th lens C-3 is located at the second cemented doublet
Thing side.
Further, the airspace between the first lens A-1 and the second lens A-2 of the preceding group A is 0.101mm；
Airspace between second lens A-2 and the 3rd lens A-3 is 2.196mm；Between 3rd lens A-3 and the 4th lens A-4
Airspace be 5.077mm；Airspace between 4th lens A-4 and iris diaphgram is 1.232mm；Iris diaphgram is with after
Airspace between group C the first cemented doublet is 15.836mm；First cemented doublet and the second cemented doublet it
Between airspace be 0.100mm；Airspace between second cemented doublet and image planes is 101.201mm.
Further, the angle of visual field of the telephoto lens is 8.4 degree.
Further, half image height of the telephoto lens is y, focal length value EFL, meets 0.05<y/EFL<0.1.
Further, the maximum clear aperature of the telephoto lens meets Fno<4, wherein Fno are maximum clear aperature F
Number.
Further, the rear cut-off distance of the telephoto lens is BFL, focal length value EFL, meets BFL/EFL>0.40.
Further, the overall length of the telephoto lens is TTL, focal length value EFL, meets TTL/EFL<1.00.
Further, the focal length value of the telephoto lens is EFL, and the focal length value for the 3rd lens A-3 for organizing A before described is
F3, the focal length value for the 4th lens A-4 for organizing A before described is F4, meets -0.41<F3/EFL<- 0.20,0.60<F4/EFL<
0.85。
Further, the telephoto lens uses spheric glass.
Further, first lens, the 6th lens, the 7th lens are biconvex lens, second lens, the 4th saturating
Mirror is crescent moon convex lens, and the 3rd lens, the 5th lens, the 8th lens are biconcave lens.
Compared with prior art, using two groups of double glued constructions come aberration correction, camera lens is cut the utility model after having
Distance, high resolution, the total length of optics, distort the advantages that small, and camera lens is ensureing high image quality imaging all using spheric glass
In the case of greatly reduce production cost.
Brief description of the drawings
Fig. 1 is the telephoto lens structural representation of embodiment 1；
Fig. 2 is the telephoto lens index path of embodiment 1；
Fig. 3 is the telephoto lens MTF curve figure of embodiment 1；
Fig. 4 is the telephoto lens curvature of field, the distortion figure of embodiment 1；
Fig. 5 is the telephoto lens structural representation of embodiment 2；
Fig. 6 is the telephoto lens index path of embodiment 2；
Fig. 7 is the telephoto lens MTF curve figure of embodiment 2；
Fig. 8 is the telephoto lens curvature of field, the distortion figure of embodiment 2.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to the utility model.
As shown in figure 1, a kind of telephoto lens of the utility model preferred embodiment, focal length 200mm, CCD size use
APS-C types by thing side to image side are successively preceding group of positive A including focal power, iris diaphgram, focal power are rear group of negative C；
Group A is included successively by thing side to image side before described：
The first lens A-1 with positive refracting power；
The second lens A-2 with positive refracting power, the thing side of the second lens is convex surface；
The 3rd lens A-3 with negative refracting power；
The 4th lens A-4 with positive refracting power, the thing side of the 4th lens is convex surface；
Group C is included successively by thing side to image side after described：
The first pair of glue touched by the 5th lens C-1 with negative refracting power with the 6th lens C-2 with positive refracting power
Close lens；
The second pair of glue touched by the 7th lens C-3 with positive refracting power with the 8th lens C-4 with negative refracting power
Close lens；Wherein, the 5th lens C-1 is located at the thing side of the first cemented doublet, and the 7th lens C-3 is located at the second cemented doublet
Thing side.
Further, the airspace between the first lens A-1 and the second lens A-2 of the preceding group A is 0.101mm；
Airspace between second lens A-2 and the 3rd lens A-3 is 2.196mm；Between 3rd lens A-3 and the 4th lens A-4
Airspace be 5.077mm；Airspace between 4th lens A-4 and iris diaphgram is 1.232mm；Iris diaphgram is with after
Airspace between group C the first cemented doublet is 15.836mm；First cemented doublet and the second cemented doublet it
Between airspace be 0.100mm；Airspace between second cemented doublet and image planes is 101.201mm.
Further, the angle of visual field of the telephoto lens is 8.4 degree.
Further, half image height of the telephoto lens is y, focal length value EFL, meets 0.05<y/EFL<0.1.
Further, the maximum clear aperature of the telephoto lens meets Fno<4, wherein Fno are maximum clear aperature F
Number.
Further, the rear cut-off distance of the telephoto lens is BFL, focal length value EFL, meets BFL/EFL>0.40.
Further, the overall length of the telephoto lens is TTL, focal length value EFL, meets TTL/EFL<1.00.
Further, the focal length value of the telephoto lens is EFL, and the focal length value for the 3rd lens A-3 for organizing A before described is
F3, the focal length value for the 4th lens A-4 for organizing A before described is F4, meets -0.41<F3/EFL<- 0.20,0.60<F4/EFL<
0.85。
Further, the telephoto lens uses spheric glass.
Further, first lens, the 6th lens, the 7th lens are biconvex lens, second lens, the 4th saturating
Mirror is crescent moon convex lens, and the 3rd lens, the 5th lens, the 8th lens are biconcave lens.
Embodiment 1：
As shown in figure 1, in the present embodiment, optical surface sequence number is the 1st face from the first lens A-1 thing side, start from
It is incremented by successively from left to right, the data such as following table of telephoto lens：
In the present embodiment, focal length EFL=200mm of telephoto lens, the maximum clear aperature F numbers of camera lens are 3.5.
In the present embodiment, telephoto lens matches with specification APS-C CCD, and half image height y=14.65mm, y/EFL=
0.07325, meet：0.05<y/EFL<0.10.
In the present embodiment, rear cut-off distance BFL=101.201mm of camera lens, BFL/EFL=0.506, meet：BFL/EFL>
0.4。
In the present embodiment, overall length TTL=169.986mm of camera lens, TTL/EFL=0.8499, meet：TTL/EFL<
1.00。
In the present embodiment, the 3rd lens A-3 focal length value F3=- 62.965mm, F3/EFL=- 0.31, meet -0.41<
F3/EFL<- 0.20, the 4th lens A-4 focal length value F4=155.184mm, F4/EFL=0.78, meet 0.60<F4/EFL<
0.85。
In the present embodiment, as shown in figure 3, camera lens MTF curve is all higher than 0.5 at 85lp/mm, high resolution as matter compared with
It is good.
In the present embodiment, as shown in figure 4, lens distortion is less than 1%, imaging requirements are met.
In the present embodiment, telephoto lens matches with the CCD of APS-C specifications, and the resolution ratio of camera lens reaches 16,000,000 pixels.
Embodiment 2：
As shown in figure 4, in the present embodiment, optical surface sequence number is the 1st face from the first lens A-1 thing side, start from
It is incremented by successively from left to right, the data such as following table of telephoto lens：
In the present embodiment, focal length EFL=200mm of telephoto lens, the maximum clear aperature F numbers of camera lens are 3.5.
In embodiment, telephoto lens matches with specification APS-C CCD, and half image height y=14.65mm, y/EFL=
0.07325, meet：0.05<y/EFL<0.10.
In the present embodiment, rear cut-off distance BFL=89.515mm of camera lens, BFL/EFL=0.447, meet：BFL/EFL>0.4.
In the present embodiment, overall length TTL=170.00mm of camera lens, TTL/EFL=0.8500, meet：TTL/EFL<1.00.
In the present embodiment, the 3rd lens A-3 focal length value F3=- 63.313mm, F3/EFL=- 0.31, meet -0.41<
F3/EFL<- 0.20, focal length value F4=136.006mm of the 4th lens A-4, F4/EFL=0.68, meet 0.60<F4/EFL<
0.85。
In the present embodiment, as shown in fig. 7, camera lens MTF curve is all higher than 0.4 at 85lp/mm, high resolution as matter compared with
It is good.
In the present embodiment, as shown in figure 8, lens distortion is less than 1.2%, imaging requirements are met.
In the present embodiment, telephoto lens camera lens matches with the CCD of APS-C specifications, and the resolution ratio of camera lens reaches 16,000,000
Pixel.
It is emphasized that embodiment described in the utility model is illustrative, rather than it is limited, therefore this reality
With the new embodiment being not limited to described in embodiment, it is every by those skilled in the art according to of the present utility model
The other embodiment that technical scheme is drawn, also belong to the scope of the utility model protection.
Claims (10)
1. a kind of telephoto lens, focal length 200mm, CCD size use APS-C types, it is characterised in that：By thing side to image side successively
Be preceding group of positive A including focal power, iris diaphgram, focal power be rear group of negative C；
Group A is included successively by thing side to image side before described：
The first lens A-1 with positive refracting power；
The second lens A-2 with positive refracting power, the thing side of the second lens is convex surface；
The 3rd lens A-3 with negative refracting power；
The 4th lens A-4 with positive refracting power, the thing side of the 4th lens is convex surface；
Group C is included successively by thing side to image side after described：
It is saturating by the 5th lens C-1 with negative refracting power and first pair of gluing of the 6th lens C-2 contiguity with positive refracting power
Mirror；
It is saturating by the 7th lens C-3 with positive refracting power and second pair of gluing of the 8th lens C-4 contiguity with negative refracting power
Mirror；Wherein, the 5th lens C-1 is located at the thing side of the first cemented doublet, and the 7th lens C-3 is located at the thing of the second cemented doublet
Side.
2. telephoto lens according to claim 1, it is characterised in that：Group A the first lens A-1 and the second lens before described
Airspace between A-2 is 0.101mm；Airspace between second lens A-2 and the 3rd lens A-3 is 2.196mm；The
Airspace between three lens A-3 and the 4th lens A-4 is 5.077mm；Air between 4th lens A-4 and iris diaphgram
Interval is 1.232mm；Airspace between iris diaphgram and rear group C the first cemented doublet is 15.836mm；First pair
Airspace between balsaming lens and the second cemented doublet is 0.100mm；Sky between second cemented doublet and image planes
Gas is at intervals of 101.201mm.
3. telephoto lens according to claim 1, it is characterised in that：The angle of visual field of the telephoto lens is 8.4 degree.
4. telephoto lens according to claim 1, it is characterised in that：Half image height of the telephoto lens is y, and focal length value is
EFL, meet 0.05<y/EFL<0.1.
5. telephoto lens according to claim 1, it is characterised in that：The maximum clear aperature of the telephoto lens meets
Fno<4, wherein Fno are maximum clear aperature F numbers.
6. telephoto lens according to claim 1, it is characterised in that：The rear cut-off distance of the telephoto lens is BFL, focal length value
For EFL, meet BFL/EFL>0.40.
7. telephoto lens according to claim 1, it is characterised in that：The overall length of the telephoto lens is TTL, and focal length value is
EFL, meet TTL/EFL<1.00.
8. telephoto lens according to claim 1, it is characterised in that：The focal length value of the telephoto lens is EFL, before described
Group A the 3rd lens A-3 focal length value is F3, and the focal length value for the 4th lens A-4 for organizing A before described is F4, meets -0.41<F3/
EFL<- 0.20,0.60<F4/EFL<0.85.
9. telephoto lens according to claim 1, it is characterised in that：The telephoto lens uses spheric glass.
10. telephoto lens according to claim 1, it is characterised in that：First lens, the 6th lens, the 7th lens
For biconvex lens, second lens, the 4th lens are crescent moon convex lens, and the 3rd lens, the 5th lens, the 8th lens are
Biconcave lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720555258.7U CN206757167U (en) | 2017-05-18 | 2017-05-18 | A kind of telephoto lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720555258.7U CN206757167U (en) | 2017-05-18 | 2017-05-18 | A kind of telephoto lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206757167U true CN206757167U (en) | 2017-12-15 |
Family
ID=60619525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720555258.7U Expired - Fee Related CN206757167U (en) | 2017-05-18 | 2017-05-18 | A kind of telephoto lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206757167U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646393A (en) * | 2018-07-13 | 2018-10-12 | 嘉兴中润光学科技有限公司 | Telephoto lens |
| WO2020119172A1 (en) * | 2018-12-14 | 2020-06-18 | 浙江舜宇光学有限公司 | Optical imaging camera |
| WO2020199573A1 (en) * | 2019-04-02 | 2020-10-08 | 浙江舜宇光学有限公司 | Camera lens group |
| CN112230386A (en) * | 2020-10-30 | 2021-01-15 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| WO2021128380A1 (en) * | 2019-12-28 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Optical camera lens |
-
2017
- 2017-05-18 CN CN201720555258.7U patent/CN206757167U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646393A (en) * | 2018-07-13 | 2018-10-12 | 嘉兴中润光学科技有限公司 | Telephoto lens |
| CN108646393B (en) * | 2018-07-13 | 2024-03-29 | 嘉兴中润光学科技股份有限公司 | Long focus lens |
| WO2020119172A1 (en) * | 2018-12-14 | 2020-06-18 | 浙江舜宇光学有限公司 | Optical imaging camera |
| WO2020199573A1 (en) * | 2019-04-02 | 2020-10-08 | 浙江舜宇光学有限公司 | Camera lens group |
| WO2021128380A1 (en) * | 2019-12-28 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Optical camera lens |
| CN112230386A (en) * | 2020-10-30 | 2021-01-15 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112230386B (en) * | 2020-10-30 | 2021-09-24 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20200518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |