CN2757154Y - Camera lens - Google Patents
Camera lens Download PDFInfo
- Publication number
- CN2757154Y CN2757154Y CN 200420095700 CN200420095700U CN2757154Y CN 2757154 Y CN2757154 Y CN 2757154Y CN 200420095700 CN200420095700 CN 200420095700 CN 200420095700 U CN200420095700 U CN 200420095700U CN 2757154 Y CN2757154 Y CN 2757154Y
- Authority
- CN
- China
- Prior art keywords
- lens
- camera lens
- optical surface
- spherical
- camera
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Lenses (AREA)
Abstract
A camera lens comprises aspheric lens and at least a phase grating. The aspheric lens are provided with a first optical surface, a second optical surface and at least an optical surface as the aspheric surface; the at least a phase grating and the aspheric lens are integrated and positioned on the first or the second optical surface of the aspheric lens. It can straighten the aberration of the camera lens effectively without increasing the volume and the gravity; it adopts the monadic structure to substitute a common aspheric lens unit to eliminate the habitual aberration problem of the sphere lens; it can reduce the number of the optical lens, lower the cost of the camera lens, and make its volume smaller.
Description
[technical field]
The utility model is about a kind of optical lens, refers to the camera lens that a kind of portable electron device uses especially.
[background technology]
Continuous development along with the internet multimedia technology, portable electron devices such as digital camera, mobile phone and PDA are by people's widespread use, the consumer wishes some functions are realized in single device, particularly portable electron device such as mobile phone and PDA is developing to high-performance, multifunction direction fast in recent years, and digital camera becomes the characteristic that develops the mobile multimedia technology with combining of portable electron devices such as mobile phone and PDA.The consumer requires portable electron device light small and exquisite so that carry, wish again simultaneously on portable electron device, to realize high-quality acquisition object image, need to design and produce the camera lens that can be easily installed in the portable electron device thus.
General optical image capturing system is normally by the main member of glass mirror group as image capturing.In general, modal constituted mode is to use three sheet glass spherical lenses combinations, and according to the sequential combination of crescent positive lens, double-concave negative lens, biconvex positive lens, that is often claim the Cook-Triplet system.But the manufacturing cost of glass mirror is very expensive, and the controllable variable of three sheet glass spheric glass groups is limited, can't fully subdue aberration.Simultaneously, the also evolution in time and become big of the required visual angle of optical system make aberration be difficult to more remove, thereby it is burnt to cause image fog to be lost, and lens design person must use a lot of sheet lens to compensate in camera lens toward contact.Like this, when image quality improved, camera lens was relatively big and heavy, is not suitable for portable electron device.
Non-spherical lens (Aspherical Lens) can increase substantially the image quality of camera in lens optical system, reduce the barrel distortion of wide-angle lens, a slice non-spherical lens can substitute several pieces spherical lens aberration for compensation, the optical design of camera lens be can simplify very significantly, its volume and weight reduced.In the existing lens design, often have, realize reducing the purpose that the camera lens volume reaches better optical property simultaneously by adopting the part non-spherical lens.
The United States Patent (USP) the 6th that on August 27th, 2002 was announced, 441, disclosed a kind of digital camera lens that adopts the part non-spherical lens for No. 971, this digital camera lens comprises one first lens, one second lens and one the 3rd lens successively by object space, these first lens are glass lenss that a two sides is sphere, and second lens and the 3rd lens all are plastic aspherical element lens.
On October 1st, 2003, the Chinese patent of bulletin also disclosed a kind of digital camera lens that adopts the part non-spherical lens for 02258384.X number, this digital camera lens comprises one first lens, one second lens and one the 3rd lens, these first lens are spherical glass lens, second lens are falcate plastic lenss, and the 3rd lens are that the two sides is all aspheric plastic lens.
On April 21st, 2004, the Chinese patent of bulletin disclosed a kind of camera lens 1 that can be used for mobile phone and digital camera for No. 03220711.5, see also Fig. 1, this camera lens 1 is that first eyeglass 11, second eyeglass 12, prismatic glasses 13, the 4th eyeglass 14 and coupling arrangement lens mount 15 and sleeve 16 are formed by 4 optical mirror slips, diaphragm 10 is located at camera lens 1 the place ahead, optical mirror slip 12,13,14 is fixed on the sleeve 16, eyeglass 11 is fixed on the eyeglass 12,17 is fixed block, and lens mount 15 and sleeve 16 threaded engagement are fixed.First eyeglass 11 is the double convex glass lens, second eyeglass 12 is the concave-concave plastic lens, wherein 122 is concave surface, and 121 is aspherical concave, and prismatic glasses 13 is falcate plastics positive lenss, wherein 131 is concave surface, 132 is the aspheric surface convex surface, and the 4th eyeglass 14 is an aspherical plastic lens, and 142 parts wherein are negative lenses, both sides 141 parts are positive lenss, and its two sides is aspheric surface.
These adopt the camera lens of part non-spherical lens, and it has obviously reduced the number of lens in the camera lens by the non-spherical lens aberration for compensation, only needs the 2-4 sheet usually.Only, because of single non-spherical lens can not fully be corrected aberration, so still need the multi-disc lens to constitute lens combination.So, the volume of camera lens and weight are still bigger, and because of it is made of the multi-disc lens, it is not easy to be directly installed in the portable electron devices such as mobile phone, be fixed in portable electron device by the coupling arrangement that is arranged on the sleeve again after need this multi-disc lens adjustment being assembled by sleeve, being provided with of sleeve will further increase the volume and weight of this camera lens, more inconvenience with portable electron device particularly portable electronic devices combine.
At the problems referred to above, the camera lens that provide that a kind of volume is little, image quality is high, can be fit to portable electron device is real in necessary.
[utility model content]
The purpose of this utility model is to provide that a kind of volume is little, image quality is high, can be fit to the camera lens of portable electron device.
The utility model camera lens comprises a non-spherical lens and at least one phase grating.It is aspheric curve that this non-spherical lens has first optical surface and second optical surface and at least one optical surface, and this at least one phase grating and above-mentioned non-spherical lens are one-body molded, is arranged on first optical surface or second optical surface of non-spherical lens.
Compared with prior art, the utility model adopts non-spherical lens and forms phase grating in aspherical lens surface, and it makes the aberration of camera lens be able to abundant rectification in volume that does not increase camera lens and weight.And adopting single structure is that alternative one common non-spherical lens group is eliminated the Aberration Problem that spherical lens is used to have, can reduce optical mirror slip and use number, more do not need simultaneously the sleeve of prior art and assembling, adjustment operation, help saving cost and make smaller volume.And the utility model is fit to manufacturing in enormous quantities, the homogeneity of product height usually by injection-moulding plastic.
As further improvement of the utility model, can be in aspherical lens surface plating film stack layer, it can be anti-reflective film and infrared cut-off light filtering films, the film stack layer has further improved the image quality of the utility model camera lens, simultaneously, the material of film stack layer 32 is generally oxide, has higher hardness, has strengthened the wearing quality of camera lens optical surface.
[description of drawings]
Fig. 1 is the sectional view of existing camera lens.
Fig. 2 is the sectional view of the utility model camera lens first embodiment.
Fig. 3 is the sectional view of the utility model camera lens second embodiment.
[embodiment]
Please refer to Fig. 2, the utility model first embodiment camera lens 2 comprises a non-spherical lens 20 and a phase grating 21.This non-spherical lens 20 is normally by plastic material manufacturings such as PMMA or PC, and it has first optical surface 201 and second optical surface 202, and wherein at least one optical surface is an aspheric curve in first optical surface 201 and second optical surface 202.Phase grating 21 right and wrong spherical lenses 20 are one-body molded, phase grating commonly used is a binary phase grat, it is arranged at first optical surface 201 or second optical surface 202 of non-spherical lens 20, in the present embodiment, aspheric curve is to be arranged at first optical surface 201, and phase grating 21 is to be arranged at second optical surface 202.
When making the utility model camera lens 2, at first, design first optical surface 201 and the geometric configuration of second optical surface 202 and the structure of phase grating 21 of non-spherical lens 20 as requested.Next is to manufacture and design mould and die surface according to above-mentioned, this die can be by the tool steel manufacturing of nickel plating, its surface configuration is consistent with first optical surface 201 and second optical surface 202 of non-spherical lens 20, and wherein at least one surface is provided with the position phase pattern corresponding to the bivariate distribution of phase grating 21.Then, by mould and the die of making, can make camera lens 2 in a large number by injection moulding.
The utility model adopts non-spherical lens and forms phase grating in aspherical lens surface, and the geometric shape of non-spherical lens utilization lens itself etc. is adjusted light refraction, can reduce the Aberration Problem that spherical lens is used to have.And the utility model is simultaneously in the one-body molded binary phase grat of aspherical lens surface, binary phase grat can obtain any wavefront that needs in theory, and it is arranged in the thickness of aspherical lens surface wavelength magnitude, substantially can not increase the volume and the weight of camera lens, combine the aberration that makes camera lens with non-spherical lens by binary phase grat and be able to abundant rectification, so it is alternative one common non-spherical lens group that the utility model camera lens only is with the single structure of the non-spherical lens of phase grating by one, the Aberration Problem of effectively avoiding spheric glass to be used to have can reduce optical mirror slip and use number.Simultaneously,, can directly be installed on the mounting structure in the portable electron device, and not need the sleeve of prior art and be arranged at the bindiny mechanism of sleeve, thereby can significantly reduce the portable electron device volume and weight because of it is a single structure.Once more, the utility model camera lens adopts the injection moulding manufacturing, and aspheric curve and phase grating form when non-spherical lens is made in the lump, do not need additional processing and assembling, have reduced assembling procedure, help saving cost.In addition,, be fit in enormous quantities the manufacturing by injection moulding, and the homogeneity of product height.
See also Fig. 3, the utility model second embodiment camera lens 3 is roughly the same with camera lens 2, also comprises a non-spherical lens 30 and a phase grating 31.Different is in the utility model camera lens 3 at its coating surface one film stack layer 32, this film stack layer 32 can be anti-reflective film (Anti-Reflection) and infrared ray cut filter coating (IR Cut Filter), and this film stack layer 32 can further improve the image quality of camera lens.In addition, film stack layer 32 all is to be formed according to the mutual storehouse of certain rule by high low-index material, as anti-reflective film is to be piled up mutually by 4 to 16 floor height index layers and low-index layer to form, wherein high refractive index layer can be Ta2O5 or TiO2 or TiO3 or Ti3O5, low-index layer can be SiO2 or Al2O3, the material of film stack layer 32 is generally oxide, has higher hardness, strengthens the wearing quality of the optical surface of camera lens.
Be appreciated that, the utility model camera lens also can all be set to aspheric curve with its two optical surface, simultaneously also can phase grating all be set, further improve the controllable variable of this camera lens, with the optics analytic ability of antagonism aberration and raising camera lens in its two optical surface.
Claims (11)
1. camera lens, comprise a non-spherical lens and at least one phase grating, it is aspheric curve that this non-spherical lens has first optical surface and second optical surface and at least one optical surface, it is characterized in that this at least one phase grating and above-mentioned non-spherical lens are one-body molded, be arranged on first optical surface or second optical surface of non-spherical lens.
2. camera lens as claimed in claim 1 is characterized in that: this non-spherical lens is the plastic aspherical element lens.
3. camera lens as claimed in claim 2 is characterized in that: the material of this non-spherical lens is the PMMA plastics.
4. camera lens as claimed in claim 2 is characterized in that: the material of this non-spherical lens is the PC plastics.
5. camera lens as claimed in claim 2 is characterized in that: this aspherical lens surface plating has a film stack layer.
6. camera lens as claimed in claim 5 is characterized in that: this film stack layer is an anti-reflective film.
7. camera lens as claimed in claim 5 is characterized in that: this film stack layer is the infrared ray cut filter coating.
8. camera lens as claimed in claim 2 is characterized in that: first optical surface and second optical surface of this non-spherical lens are aspheric curve.
9. camera lens as claimed in claim 2 is characterized in that: first optical surface and second optical surface of this non-spherical lens are provided with phase grating.
10. camera lens as claimed in claim 1 is characterized in that: this phase grating is a binary phase grat.
11. camera lens as claimed in claim 10 is characterized in that: this non-spherical lens and phase grating are to form by injection moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420095700 CN2757154Y (en) | 2004-11-20 | 2004-11-20 | Camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420095700 CN2757154Y (en) | 2004-11-20 | 2004-11-20 | Camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2757154Y true CN2757154Y (en) | 2006-02-08 |
Family
ID=35965541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420095700 Expired - Lifetime CN2757154Y (en) | 2004-11-20 | 2004-11-20 | Camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2757154Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022068031A1 (en) * | 2020-09-29 | 2022-04-07 | 烟台睿创微纳技术股份有限公司 | Composite lens and manufacturing method therefor, and infrared detector |
-
2004
- 2004-11-20 CN CN 200420095700 patent/CN2757154Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022068031A1 (en) * | 2020-09-29 | 2022-04-07 | 烟台睿创微纳技术股份有限公司 | Composite lens and manufacturing method therefor, and infrared detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203881963U (en) | An annular optical element, an imaging lens group and a mobile apparatus | |
| CN106443986B (en) | Image capturing lens assembly, image capturing device and electronic device | |
| CN102798963B (en) | Image pickup lens assembly | |
| CN108196353A (en) | Camera lens module | |
| CN108519658A (en) | Camera lens module | |
| CN1737635A (en) | Digital camera lens | |
| CN100529829C (en) | Lens of digital camera | |
| CN1928601A (en) | Lens of digital camera and digital camera | |
| CN2520515Y (en) | Video lens | |
| CN101226271B (en) | Photographic optical lens assembly | |
| CN202693835U (en) | Optical filter for image chip | |
| CN105511056B (en) | A kind of optical lens and camera device | |
| CN2763823Y (en) | Composite lens system | |
| CN2757154Y (en) | Camera lens | |
| CN211293430U (en) | Optical imaging lens | |
| CN100504488C (en) | Digital camera lens | |
| CN100516964C (en) | Lens of digital camera | |
| CN1715980A (en) | Aspherical lens and manufacture method thereof | |
| CN100541258C (en) | Imaging optical frames group | |
| CN2695994Y (en) | Digital camera lens | |
| CN107065144B (en) | Wide-angle lens | |
| CN206270579U (en) | One kind is without thermalization high definition wide-angle lens | |
| CN213690088U (en) | Optical imaging lens | |
| CN100380158C (en) | Optical lenses for image formation | |
| CN2731485Y (en) | Lens of digital camera and digital camera module using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141120 Granted publication date: 20060208 |