CN104459944A - Fixed focal length depth-of-field miniature lens - Google Patents
Fixed focal length depth-of-field miniature lens Download PDFInfo
- Publication number
- CN104459944A CN104459944A CN201410776954.1A CN201410776954A CN104459944A CN 104459944 A CN104459944 A CN 104459944A CN 201410776954 A CN201410776954 A CN 201410776954A CN 104459944 A CN104459944 A CN 104459944A
- Authority
- CN
- China
- Prior art keywords
- lens
- group
- plano
- long depth
- field micro
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 230000004075 alteration Effects 0.000 claims description 7
- 230000003595 spectral effect Effects 0.000 claims description 7
- 238000004026 adhesive bonding Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000005286 illumination Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004304 visual acuity Effects 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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to a fixed focal length depth-of-field miniature lens comprising an optical system arranged in a primary mirror barrel. The optical system is sequentially provided with a front group and a rear group in the light ray incidence direction, the focal power of the front group is negative, the focal power of the rear group is positive, the front group sequentially comprises a plano-convex lens, a negative crescent-shaped lens and a plano-concave lens, and the rear group is a gluing group formed by connecting two biconvex lenses in a sealing mode. Compared with the prior art, the fixed focal length depth-of-field miniature lens has the advantages that the relative aperture is small, resolution is high and the depth of field is large.
Description
Technical field
The present invention relates to one and focus long depth of field micro-lens.
Background technology
It is large to meet illumination requirement that existing camera lens conventional design is all relative aperture, but for tight shot can not focus just need the depth of field ensure greatly before and after have larger definition range.
Summary of the invention
The object of the invention is for above weak point, provide one and focus long depth of field micro-lens.
The scheme that technical solution problem of the present invention adopts is that one focuses long depth of field micro-lens, comprise the optical system be arranged in primary mirror bucket, to be the focal power set gradually along light direction be described optical system that negative front group and focal power are positive rear group, described front group comprises and is disposed with plano-convex lens, negative selenodont lens and plano-concave lens, and described rear group is the gummed group of biconvex lens and biconvex lens contiguity.
Further, the airspace between described front group and rear group is 3.03mm.
Further, the airspace between described plano-convex lens and negative selenodont lens is 0.15mm, and the airspace between described negative selenodont lens and plano-concave lens is 0.46mm.
Further, described primary mirror bucket front end is provided with the front trim ring pushing down plano-convex lens, is provided with the first spacer ring between described plano-convex lens and negative selenodont lens, is provided with the second spacer ring between described front group and rear group.
Further, the relative aperture of described second spacer ring internal diameter is 1:6.
Further, before described, the focal length of group is-8.66mm, and the focal length of described rear group is 6.92mm.
Further, when optical design, aberration correction and balance are carried out to the wide spectral range of 485 ~ 850nm, make camera lens all have excellent picture element at wide spectral range.
Compared with prior art, the present invention has following beneficial effect: the present invention has the advantage of little relative aperture, high resolving power, depth of field length.Adopt the retrofocus type structure that positive negative power is separated, the focal distance f of front group of A
=-8.66mm, the focal distance f of rear group of B
=6.92mm, after two constituent element combinations, make rear leading role's reach of camera lens, the rear cut-off distance of camera lens reaches 7.24mm; The lens of front group of camera lens all select the glass of high index of refraction to assume responsibility for very large focal power, through after organize B refraction after, the angle of chief ray and optical axis reduces, and depth of field change greatly, makes camera lens achieve excellent aberration correction, and makes the uniform-illumination of image planes, clear; Place the gummed group of two biconvex lens rear group of camera lens, effectively utilize the aberration that it carrys out corrective lens, make the resolution of camera lens up to mega pixel.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, patent of the present invention is further illustrated.
Fig. 1 is structural representation of the present invention;
In figure:
Trim ring before 1-; 2-first spacer ring; 3-primary mirror bucket; 4-second spacer ring; 5-plano-convex lens; 6-bears selenodont lens; 7-plano-concave lens; 8-gummed group.
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
As shown in Figure 1, one focuses long depth of field micro-lens, comprise the optical system be arranged in primary mirror bucket 3, to be the focal power set gradually along light direction be described optical system that negative front group and focal power are positive rear group, described front group comprises and is disposed with plano-convex lens 5, negative selenodont lens 6 and plano-concave lens 7, the described rear group of gummed group 8 being biconvex lens and biconvex lens and touching, the lens of front group of camera lens all select the glass of high index of refraction to assume responsibility for very large focal power, through after organize B refraction after, the angle of chief ray and optical axis reduces, the depth of field becomes large, camera lens is made to achieve excellent aberration correction, and make the uniform-illumination of image planes, clear, place the gummed group of two biconvex lens rear group of camera lens, effectively utilize the aberration that it carrys out corrective lens, make the resolution of camera lens up to mega pixel.
In the present embodiment, the airspace between described front group and rear group is 3.03mm.
In the present embodiment, the airspace between described plano-convex lens 5 and negative selenodont lens 6 is 0.15mm, and the airspace between described negative selenodont lens 6 and plano-concave lens 7 is 0.46mm.
In the present embodiment, described primary mirror bucket 3 front end is provided with the front trim ring 1 pushing down plano-convex lens 5, is provided with the first spacer ring 2 between described plano-convex lens 5 and negative selenodont lens 6, is provided with the second spacer ring 4 between described front group and rear group.
In the present embodiment, the light field in optics is put and is reduced by described second spacer ring 4, and the internal diameter of the second spacer ring 4 is 1:6 according to its relative aperture of optical design.
In the present embodiment, before described, the focal length of group is-8.66mm, and the focal length of described rear group is 6.92mm, and after two constituent element combinations, make rear leading role's reach of camera lens, the rear cut-off distance of camera lens reaches 7.24mm.
In the present embodiment, when optical design, aberration correction and balance are carried out to the wide spectral range of 485 ~ 850nm, camera lens is made all to have excellent picture element at wide spectral range, such camera lens can not only blur-free imaging under photoenvironment in the daytime, under night pole low-light (level) environment, by infrared light filling, also can blur-free imaging.
In the present embodiment, this camera lens reaches following optical index: (1) focal length: f '=16mm; (2) relative aperture F=1:6; (3) field angle: 2w≤28 °; (4) resolution: can be adaptive with mega pixel high-resolution CCD or cmos camera; (5) light path overall length ∑≤19.67mm, optics rear cut-off distance l ' >=7.24mm; (6) spectral line scope: 486nm ~ 656nm is suitable for.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; be understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. one kind focuses long depth of field micro-lens, it is characterized in that: comprise the optical system be arranged in primary mirror bucket, to be the focal power set gradually along light direction be described optical system that negative front group and focal power are positive rear group, described front group comprises and is disposed with plano-convex lens, negative selenodont lens and plano-concave lens, and described rear group is the gummed group of two biconvex lens contiguity.
2. according to claims 1, focus long depth of field micro-lens, it is characterized in that: the airspace between described front group and rear group is 3.03mm.
3. according to claims 1, focus long depth of field micro-lens, it is characterized in that: the airspace between described plano-convex lens and negative selenodont lens is 0.15mm, the airspace between described negative selenodont lens and plano-concave lens is 0.46mm.
4. according to claims 1, focus long depth of field micro-lens, it is characterized in that: described primary mirror bucket front end is provided with the front trim ring pushing down plano-convex lens, be provided with the first spacer ring between described plano-convex lens and negative selenodont lens, between described front group and rear group, be provided with the second spacer ring.
5. according to claims 4, focus long depth of field micro-lens, it is characterized in that: the relative aperture of described second spacer ring internal diameter is 1:6.
6. according to claims 1, focus long depth of field micro-lens, it is characterized in that: before described, the focal length of group is-8.66mm, and the focal length of described rear group is 6.92mm.
7. according to claims 1, focus long depth of field micro-lens, it is characterized in that: when optical design, aberration correction and balance are carried out to the wide spectral range of 485 ~ 850nm, make camera lens all have excellent picture element at wide spectral range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410776954.1A CN104459944A (en) | 2014-12-17 | 2014-12-17 | Fixed focal length depth-of-field miniature lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410776954.1A CN104459944A (en) | 2014-12-17 | 2014-12-17 | Fixed focal length depth-of-field miniature lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104459944A true CN104459944A (en) | 2015-03-25 |
Family
ID=52906269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410776954.1A Pending CN104459944A (en) | 2014-12-17 | 2014-12-17 | Fixed focal length depth-of-field miniature lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104459944A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405797A (en) * | 2016-11-25 | 2017-02-15 | 福建福光股份有限公司 | Economical high-light-flux and high-resolution prime lens |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101339288A (en) * | 2007-07-05 | 2009-01-07 | 富士能株式会社 | Imaging lens and imaging device |
| CN101354475A (en) * | 2007-07-26 | 2009-01-28 | 亚洲光学股份有限公司 | Focus fixing lens |
| US8659841B2 (en) * | 2011-08-11 | 2014-02-25 | Pentax Ricoh Imaging Company, Ltd. | Superwide-angle lens system |
| CN103984077A (en) * | 2014-05-29 | 2014-08-13 | 福建福光数码科技有限公司 | Day and night prime lens with high resolution ratio |
| US20140293444A1 (en) * | 2013-03-29 | 2014-10-02 | Canon Kabushiki Kaisha | Image pickup lens and image pickup apparatus including the same |
| CN204287583U (en) * | 2014-12-17 | 2015-04-22 | 福建福光数码科技有限公司 | Focus long depth of field micro-lens |
-
2014
- 2014-12-17 CN CN201410776954.1A patent/CN104459944A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101339288A (en) * | 2007-07-05 | 2009-01-07 | 富士能株式会社 | Imaging lens and imaging device |
| CN101354475A (en) * | 2007-07-26 | 2009-01-28 | 亚洲光学股份有限公司 | Focus fixing lens |
| US8659841B2 (en) * | 2011-08-11 | 2014-02-25 | Pentax Ricoh Imaging Company, Ltd. | Superwide-angle lens system |
| US20140293444A1 (en) * | 2013-03-29 | 2014-10-02 | Canon Kabushiki Kaisha | Image pickup lens and image pickup apparatus including the same |
| CN103984077A (en) * | 2014-05-29 | 2014-08-13 | 福建福光数码科技有限公司 | Day and night prime lens with high resolution ratio |
| CN204287583U (en) * | 2014-12-17 | 2015-04-22 | 福建福光数码科技有限公司 | Focus long depth of field micro-lens |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405797A (en) * | 2016-11-25 | 2017-02-15 | 福建福光股份有限公司 | Economical high-light-flux and high-resolution prime lens |
| CN106405797B (en) * | 2016-11-25 | 2018-07-27 | 福建福光股份有限公司 | Economical big thang-kng amount high-resolution tight shot |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105182507A (en) | Ultrahigh-definition large-image surface and wide-angle prime lens | |
| CN203350522U (en) | 16mm wide aperture day and night fixed focus lenses | |
| CN205157870U (en) | Clear tight shot of superelevation | |
| CN103439782B (en) | 2.8 focus bugeye lens | |
| CN203350521U (en) | 8mm wide-aperture day and night fixed focal lenses | |
| CN104330873A (en) | Day and night high-resolution fish-eye lens | |
| CN103777333A (en) | High-resolving force optical zoom lens with large target surface | |
| CN204229037U (en) | High resolution day and night fish eye lens | |
| CN104280860B (en) | A kind of high-resolution pick-up lens | |
| CN203422521U (en) | 12mm wide-aperture prime lens for day-night use | |
| CN103399391B (en) | Ten million pixel large target surface day and night micro pick-up lens | |
| CN204556943U (en) | High resolving power, low distortion day and night tight shot | |
| CN204496091U (en) | The economic money micro-lens of high resolution day and night | |
| CN103823291B (en) | Little target surface high resolving power ultra-wide angle fish eye lens | |
| CN104459944A (en) | Fixed focal length depth-of-field miniature lens | |
| CN202177734U (en) | Day and night mini camera lens having super wide angle and high resolution | |
| CN105372797A (en) | Miniature zooming aspheric lens | |
| CN204287583U (en) | Focus long depth of field micro-lens | |
| CN204009205U (en) | The large visual field of wide spectrum day and night monitoring camera | |
| CN103389565B (en) | Low-distortion and high-resolution infrared miniature lens | |
| CN203422522U (en) | Low-distortion high-resolution infrared miniature lens | |
| CN104181674A (en) | High-resolution fine adjustment day and night prime lens | |
| CN203759343U (en) | Small-target-surface high-resolution ultra-wide-angle fish-eye lens | |
| CN203422519U (en) | Ultra-wide-angle 2.8 primary lens | |
| CN203759340U (en) | High-precision plastic high-definition lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Applicant after: FUJIAN FORECAM CO., LTD. Address before: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Applicant before: Fujian Forecam Optics Co., Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: FUJIAN FORECAM DIGITAL TECHNOLOGY CO., LTD. TO: FUJIAN FORECAM CO., LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |