CN116643377A - Six-piece type 1G5P miniature ultra-wide angle low-temperature-drift lens - Google Patents
Six-piece type 1G5P miniature ultra-wide angle low-temperature-drift lens Download PDFInfo
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- CN116643377A CN116643377A CN202310648444.5A CN202310648444A CN116643377A CN 116643377 A CN116643377 A CN 116643377A CN 202310648444 A CN202310648444 A CN 202310648444A CN 116643377 A CN116643377 A CN 116643377A
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- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 230000008859 change Effects 0.000 claims description 17
- 238000007654 immersion Methods 0.000 abstract description 5
- 230000000007 visual effect Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000004304 visual acuity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 47
- 210000001747 pupil Anatomy 0.000 description 8
- 238000012546 transfer Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- 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
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
-
- 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
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0138—Head-up displays characterised by optical features comprising image capture systems, e.g. camera
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention provides a six-piece-type 1G5P microminiature ultra-wide angle low-temperature drift lens, which comprises a first lens, a second lens, a third lens, an aperture diaphragm, a fourth lens, a fifth lens and a sixth lens which are arranged from an object side to an image side along an optical axis, wherein corresponding structures and corresponding parameters are designed for six lenses, the volume is small, the lens can be suitable for more complex and diversified scenes, and the system cost is effectively reduced; the immersion sense can be increased by a large visual field, and the large-scale monitoring can be realized by a single lens; the low temperature drift can enhance the reliability of the system and still has good resolving power in extremely cold or hot environments.
Description
Technical Field
The invention relates to the field of optical devices, in particular to a six-piece type 1G5P microminiature ultra-wide angle low-temperature drift lens.
Background
Home office, driving simulation, online teaching, virtual shopping and the like can be realized through meta universe relaxation. And the optical lens plays an important pivotal role therein. The meta universe is realized, and visual experience can be brought to users most, so that the visual effect is achieved. Techniques such as AR, VR, etc., in VR optics, a 90 ° field angle is considered to be the sum of the ruled lines of the VR immersion experience, and a 120 ° field angle is generally considered to be the criterion for the partial immersion experience. With the wider and wider application range of the optical lens, the problem of performance variation of the lens at different temperatures is not ignored.
Disclosure of Invention
Based on the requirements set forth in the background art, the invention provides a six-piece-type architecture 1G5P microminiature ultra-wide angle low-temperature drift lens, which comprises a first lens, a second lens, a third lens, an aperture diaphragm, a fourth lens, a fifth lens and a sixth lens which are arranged from an object side to an image side along an optical axis;
the first lens is a negative lens and is a biconcave mirror surface;
the second lens is a negative lens, the object side is a concave surface, and the image side is a convex surface;
the third lens is a positive lens, faces the object space and is a plane, and the image space is a convex surface;
the fourth lens is a positive lens and a biconvex lens;
the fifth lens is a negative lens and a biconcave mirror;
the sixth lens is a negative lens, is concave towards the object, and has a change from concave to convex from the center concave to the edge in the aspect of image comparison.
On the basis of the technical scheme, the invention can also make the following improvements.
Optionally, the focal length of the third lens is f3, and the total focal length of the lens is f, which satisfies the following conditions:
1.4≤|f3/f|≤2.0。
optionally, the combined focal length of the first, second and third lenses is a front group focal length f123, and the combined focal length of the fourth, fifth and sixth lenses is a back group focal length f456, which satisfies:
1.2≤f123/f456≤1.4。
optionally, the front group focal length f123 and the total focal length f of the lens satisfy:
3.2≤f123/f≤3.4。
optionally, the back group focal length f456 and the total focal length f of the lens satisfy:
2.4≤f456/f≤2.6。
optionally, the abbe number of the third lens is vd3, which satisfies:
50≤vd≤60。
optionally, the radius of curvature of the surface of the third lens concave towards the image plane is G3R2, which satisfies the following conditions:
-1.2≤|G3R2/f|≤-0.8。
optionally, the total optical length of the lens is TTL, which satisfies the following conditions:
5.5mm≤TTL≤6.5mm。
optionally, the combined focal length of the fourth lens, the fifth lens and the sixth lens is a back group focal length f456, and in a temperature change of-20 DEG to 60 DEG, the back group focal length change satisfies delta BFL of 3um to 7.5um.
The six-piece-type 1G5P microminiature ultra-wide angle low-temperature drift lens provided by the invention has the advantages that the corresponding structure and the corresponding parameters are designed for six lenses, the volume is small, the lens can be suitable for more complex and diversified scenes, and the system cost is effectively reduced; the immersion sense can be increased by a large visual field, and the large-scale monitoring can be realized by a single lens; the low temperature drift can enhance the reliability of the system and still has good resolving power in extremely cold or hot environments.
Drawings
Fig. 1 is a schematic structural diagram of a six-piece 1G5P micro ultra-wide angle low temperature drift lens according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of FFT MTF data of a six-piece architecture 1G5P micro-wide angle low temperature drift lens according to the field of view position change in the first embodiment;
fig. 3 is a schematic diagram of FFT modulation transfer function data of a six-piece architecture 1G5P micro ultra-wide angle low temperature drift lens with defocus variation at a specific frequency according to a first embodiment;
fig. 4 is a schematic diagram of distortion and curvature of field of a six-piece architecture 1G5P micro ultra-wide angle low temperature lens according to the first embodiment, wherein the arbitrary field of view is defined by Wave, and the light is distorted at an arbitrary pupil;
fig. 5 is a Ray fan diagram of a six-piece 1G5P micro ultra-wide angle low temperature drift lens according to the first embodiment;
fig. 6 is a schematic diagram of comparing each field of view of the six-piece 1G5P micro ultra-wide angle low temperature drift lens with the central brightness according to the first embodiment;
fig. 7 is a schematic structural diagram of a six-piece 1G5P micro ultra-wide angle low temperature drift lens according to a second embodiment of the present invention;
fig. 8 is a schematic diagram of FFT MTF data of a six-piece architecture 1G5P micro-wide angle low temperature drift lens according to the field of view position change in a second embodiment;
fig. 9 is a diagram of FFT modulation transfer function data of a six-piece architecture 1G5P micro ultra-wide angle low temperature drift lens with defocus variation at a specified frequency according to a second embodiment;
fig. 10 is a schematic diagram of distortion and curvature of field of a six-piece architecture 1G5P micro ultra-wide angle low temperature lens according to a second embodiment, wherein the arbitrary field of view is defined by Wave, and the light is distorted at an arbitrary pupil;
FIG. 11 is a Ray fan diagram of a six-piece 1G5P micro ultra-wide angle low temperature drift lens according to a second embodiment;
fig. 12 is a schematic diagram showing a comparison between each field of view and the central brightness of a six-piece-structure 1G5P micro ultra-wide angle low temperature drift lens according to a second embodiment;
fig. 13 is a schematic structural diagram of a six-piece 1G5P micro ultra-wide angle low temperature drift lens according to a third embodiment of the present invention;
fig. 14 is a schematic diagram of FFT MTF data of a six-piece architecture 1G5P micro-wide angle low temperature drift lens according to the field of view position change in a third embodiment;
fig. 15 is a diagram of FFT modulation transfer function data of a six-piece architecture 1G5P micro ultra-wide angle low temperature drift lens with defocus variation at a specific frequency according to a third embodiment;
fig. 16 is a schematic diagram of distortion and curvature of field of a six-piece architecture 1G5P micro ultra-wide angle low temperature lens according to a third embodiment, wherein the field of view is arbitrary at Wave-defined wavelength, and the curvature of field is arbitrary at pupil;
fig. 17 is a Ray fan diagram of a six-piece architecture 1G5P micro ultra-wide angle low temperature drift lens according to a third embodiment;
fig. 18 is a schematic diagram showing a comparison between each field of view and the central brightness of a six-piece-structure 1G5P micro ultra-wide angle low temperature drift lens according to a third embodiment;
fig. 19 is a schematic structural diagram of a six-piece 1G5P micro ultra-wide angle low temperature drift lens according to a fourth embodiment of the present invention;
fig. 20 is a schematic diagram of FFT MTF data of a six-piece architecture 1G5P micro-wide angle low temperature drift lens according to the field of view position change in the fourth embodiment;
fig. 21 is a diagram showing FFT modulation transfer function data of a six-piece architecture 1G5P micro ultra-wide angle low temperature drift lens with defocus variation at a specified frequency according to a fourth embodiment;
fig. 22 is a schematic diagram of distortion and curvature of field of a six-piece architecture 1G5P micro ultra-wide angle low temperature lens according to the fourth embodiment, wherein the arbitrary field of view is defined by Wave, and the light is distorted at an arbitrary pupil;
fig. 23 is a Ray fan diagram of a six-piece architecture 1G5P micro ultra-wide angle low temperature drift lens according to a fourth embodiment;
fig. 24 is a schematic diagram showing a comparison between each field of view and the central brightness of a six-piece-structure 1G5P micro ultra-wide angle low temperature drift lens according to the fourth embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, the technical features of each embodiment or the single embodiment provided by the invention can be combined with each other at will to form a feasible technical scheme, and the combination is not limited by the sequence of steps and/or the structural composition mode, but is necessarily based on the fact that a person of ordinary skill in the art can realize the combination, and when the technical scheme is contradictory or can not realize, the combination of the technical scheme is not considered to exist and is not within the protection scope of the invention claimed.
In order to reduce the drift of the performance of the lens along with temperature and meet the design requirements of clear imaging and relatively small distortion influence, the invention provides a six-piece-type 1G5P microminiature ultra-wide angle low temperature drift lens, and referring to fig. 1, the lens uses six lenses, and elements are arranged in sequence from an object side to an image side along an optical axis: a first lens (L1), a second lens (L2), a third lens (G3), an aperture STOP (STOP), a fourth lens (L4), a fifth lens (L5), and a sixth lens (L6).
Wherein the first lens (L1) is a negative lens and is a biconcave mirror surface. The second lens (L2) is a negative lens, concave toward the object side, and convex toward the image side. The third lens (G3) is a positive lens, and faces the object side to form a plane, and the image side is a convex surface. The fourth lens (L4) is a positive lens and a double convex lens. The fifth lens (L5) is a negative lens and a biconcave mirror. The sixth lens (L6) is a negative lens, is concave toward the object, and has a change from concave to convex in the center concave to convex in the edge in the image.
Defining the total focal length of the first lens (L1) and the second lens (L2) as f12, the focal length of the third lens (G3) as f3, the total focal length of the lens as f, the total focal length of the first lens (L1), the second lens (L2) and the third lens (G3) as f123 of the front group, and the total focal length of the fourth lens (L4), the fifth lens (L5) and the sixth lens (L6) as f456 of the back group. The refractive index nd, abbe number vd, the curvature radius G3R2 of the concave surface of the third lens (G3) to the image surface, and the lens optical assembly TTL.
These parameters satisfy the following conditions:
1.4≤|f3/f|≤2.0；
1.2≤f123/f456≤1.4；
3.2≤f123/f≤3.4；
2.4≤f456/f≤2.6；
50≤vd≤60；
-1.2≤|G3R2/f|≤-0.8；
5.5mm≤TTL≤6.5mm。
the combined focal length of the fourth lens, the fifth lens and the sixth lens is a back group focal length f456, and in the temperature change of-20 degrees to 60 degrees, the back group focal length change satisfies delta BFL of more than or equal to 3um and less than or equal to 7.5um.
Among them, the data of each lens of the 1G5P microminiature ultra-wide angle low temperature drift lens of the first embodiment is shown in table 1 below.
TABLE 1
The conditions that the optical parameters of the first lens to the sixth lens satisfy are shown in table 2.
TABLE 2
Fig. 2 is a schematic diagram of FFT MTF data of a 1G5P micro ultra-wide angle low temperature drift lens according to the first embodiment. Fig. 3 is a schematic diagram of FFT modulation transfer function data of defocus variation of the 1G5P micro ultra-wide angle low temperature shift lens of the first embodiment at a specific frequency, fig. 4 is a schematic diagram of distortion and curvature of field of light at any pupil of any field of view of the 1G5P micro ultra-wide angle low temperature shift lens of the first embodiment at a wavelength defined by Wave, and fig. 5 is a Ray fan diagram of the 1G5P micro ultra-wide angle low temperature shift lens of the first embodiment; fig. 6 is a schematic diagram showing a comparison between each field of view and the central brightness of the 1G5P miniature ultra-wide angle low-temperature drift lens according to the first embodiment.
Fig. 7 is a schematic structural diagram of a six-piece-type architecture 1G5P micro ultra-wide angle low temperature drift lens according to a second embodiment, which has the same structure as that of the first embodiment, and is different in that: the lens data, the cone coefficient, the aspherical coefficient and the optical parameter of each lens are different.
Among them, the data of each lens of the 1G5P microminiature ultra-wide angle low temperature shift lens of the second embodiment is shown in table 3 below.
TABLE 3 Table 3
The conditions that the optical parameters of the first lens to the sixth lens satisfy are shown in table 4.
TABLE 4 Table 4
| f456/f＝ | 2.4434 |
| f123/f＝ | 3.3662 |
| f123/f456＝ | 1.3777 |
| f3/f＝ | 1.4454 |
| |G3R2/f|＝ | -1.0104 |
Fig. 8 is a schematic diagram of FFT MTF data of a 1G5P miniature ultra-wide angle low temperature drift lens according to the change of the field position in the second embodiment. Fig. 9 is a schematic diagram of FFT modulation transfer function data of defocus variation of the 1G5P micro ultra-wide angle low temperature shift lens of the second embodiment at a specific frequency, fig. 10 is a schematic diagram of distortion and curvature of field of light at any pupil of any field of view of the 1G5P micro ultra-wide angle low temperature shift lens of the second embodiment at a wavelength defined by Wave, and fig. 11 is a Ray fan diagram of the 1G5P micro ultra-wide angle low temperature shift lens of the second embodiment; fig. 12 is a schematic diagram showing a comparison between each field of view and the central brightness of a 1G5P micro ultra-wide angle low-temperature drift lens according to the second embodiment.
Fig. 13 is a schematic structural diagram of a six-piece-type architecture 1G5P micro ultra-wide angle low temperature drift lens according to a third embodiment, which has the same structure as that of the first embodiment, and is different in that: the lens data, the cone coefficient, the aspherical coefficient and the optical parameter of each lens are different.
Among them, the data of each lens of the 1G5P microminiature ultra-wide angle low temperature shift lens of the third embodiment is shown in table 5 below.
TABLE 5
The conditions that the optical parameters of the first lens to the sixth lens satisfy are shown in table 6.
TABLE 6
| f456/f＝ | 2.4395 |
| f123/f＝ | 3.3508 |
| f123/f456＝ | 1.3736 |
| f3/f＝ | 1.4214 |
| |G3R2/f|＝ | -0.9937 |
Fig. 14 is a schematic diagram of FFT MTF data of a 1G5P miniature ultra-wide angle low temperature drift lens according to the field of view position change in the third embodiment. Fig. 15 is a schematic diagram of FFT modulation transfer function data of defocus variation of the 1G5P micro ultra-wide angle low temperature shift lens of the third embodiment at a specific frequency, fig. 16 is a schematic diagram of distortion and curvature of field of light at any pupil of any field of view of the 1G5P micro ultra-wide angle low temperature shift lens of the third embodiment at a wavelength defined by Wave, and fig. 17 is a Ray fan diagram of the 1G5P micro ultra-wide angle low temperature shift lens of the third embodiment; fig. 18 is a schematic diagram showing a comparison between each field of view and the central brightness of a 1G5P miniature ultra-wide angle low-temperature drift lens according to the third embodiment.
Fig. 19 is a schematic structural diagram of a six-piece-type architecture 1G5P micro ultra-wide angle low temperature drift lens according to the fourth embodiment, which has the same structure as that of the first embodiment, and is different in that: the lens data, the cone coefficient, the aspherical coefficient and the optical parameter of each lens are different.
Among them, each lens data of the ultra-wide angle low temperature drift lens of the fourth embodiment is as follows in table 7.
TABLE 7
The conditions that the optical parameters of the first lens to the sixth lens satisfy are shown in table 8.
TABLE 8
| f456/f＝ | 2.4684 |
| f123/f＝ | 3.3534 |
| f123/f456＝ | 1.3585 |
| f3/f＝ | 1.4292 |
| |G3R2/f|＝ | -0.9992 |
Fig. 20 is a schematic diagram of FFT MTF data of the ultra-wide angle low temperature drift lens according to the variation of the field position in the fourth embodiment. Fig. 21 is a schematic diagram of FFT modulation transfer function data of the ultra-wide low-temperature drift lens of the fourth embodiment, which changes in defocus at a specific frequency, fig. 22 is a schematic diagram of distortion and curvature of field of light at an arbitrary pupil of the ultra-wide low-temperature drift lens of the fourth embodiment, and fig. 23 is a Ray fan diagram of the ultra-wide low-temperature drift lens of the fourth embodiment; fig. 24 is a schematic diagram showing a comparison between each field of view and the central brightness of the ultra-wide angle low-temperature lens according to the fourth embodiment.
The six-piece-type 1G5P miniature ultra-wide angle low-temperature drift lens provided by the invention comprises six lenses, and the six lenses are designed with corresponding structures and corresponding parameters, so that the lens has small volume and can be suitable for more complex and various scenes, and the system cost is effectively reduced; the immersion sense can be increased by a large visual field, and the large-scale monitoring can be realized by a single lens; the low temperature drift can enhance the reliability of the system and still has good resolving power in extremely cold or hot environments. The front group focal length f 123/total focal length f is more than or equal to 3.2 and less than or equal to 3.4, so that the lens is beneficial to correcting distortion; the back group focal length f 456/total focal length f is more than or equal to 2.4 and less than or equal to 2.6, which is beneficial to improving the performance of the lens; the third lens focal length f3/f is between 1.3 and 1.4 and the Abbe number vd is between 50 and 60, which is beneficial for correcting chromatic aberration of the lens; the total optical length of the lens is 5.5-6.5mm, which is favorable for realizing small volume; the change of the back focus in the temperature change of-20 degrees to 60 degrees meets the requirement of 3um delta BFL less than or equal to 7.5um, which is beneficial to realizing low-temperature drift; the maximum field angle satisfies FOV not less than 142 degrees, which is beneficial to realizing ultra-wide angle.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. The six-piece type 1G5P microminiature ultra-wide angle low-temperature drift lens is characterized by comprising a first lens, a second lens, a third lens, an aperture diaphragm, a fourth lens, a fifth lens and a sixth lens which are arranged from an object side along an optical axis to an image side;
the first lens is a negative lens and is a biconcave mirror surface;
the second lens is a negative lens, the object side is a concave surface, and the image side is a convex surface;
the third lens is a positive lens, faces the object space and is a plane, and the image space is a convex surface;
the fourth lens is a positive lens and a biconvex lens;
the fifth lens is a negative lens and a biconcave mirror;
the sixth lens is a negative lens, is concave towards the object, and has a change from concave to convex from the center concave to the edge in the aspect of image comparison.
2. The lens of claim 1, wherein the third lens has a focal length f3 and a total focal length f, which satisfies the following conditions:
1.4≤|f3/f|≤2.0。
3. the lens barrel of claim 2, wherein the combined focal length of the first lens, the second lens and the third lens is a front group focal length f123 and the combined focal length of the fourth lens, the fifth lens and the sixth lens is a back group focal length f456, which satisfies the following:
1.2≤f123/f456≤1.4。
4. a lens according to claim 3, wherein the front group focal length f123 and the total focal length f of the lens satisfy:
3.2≤f123/f≤3.4。
5. a lens according to claim 3, wherein the back group focal length f456 and the total focal length f of the lens satisfy:
2.4≤f456/f≤2.6。
6. the lens barrel according to claim 1, wherein the abbe number of the third lens is vd3, satisfying:
50≤vd≤60。
7. the lens according to claim 2, wherein a radius of curvature of a surface of the third lens concave toward the image surface is G3R2, which satisfies:
-1.2≤|G3R2/f|≤-0.8。
8. the lens of claim 1, wherein the total optical length of the lens is TTL, satisfying:
5.5mm≤TTL≤6.5mm。
9. the lens barrel of claim 1, wherein the combined focal length of the fourth lens, the fifth lens and the sixth lens is a back group focal length f456, and wherein the back group focal length change satisfies 3 um.ltoreq.Δbfl.ltoreq.7.5 um in a temperature change of-20 ° to 60 °.
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| CN202310648444.5A CN116643377A (en) | 2023-05-30 | 2023-05-30 | Six-piece type 1G5P miniature ultra-wide angle low-temperature-drift lens |
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| CN202310648444.5A CN116643377A (en) | 2023-05-30 | 2023-05-30 | Six-piece type 1G5P miniature ultra-wide angle low-temperature-drift lens |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170184818A1 (en) * | 2015-08-06 | 2017-06-29 | Zhejiang Sunny Optics Co., Ltd. | Ultra-wide-angle lens assembly |
| CN112099206A (en) * | 2020-11-23 | 2020-12-18 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| CN116027523A (en) * | 2022-12-29 | 2023-04-28 | 协益电子（苏州）有限公司 | Ultra-wide angle in-car monitoring lens |
-
2023
- 2023-05-30 CN CN202310648444.5A patent/CN116643377A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170184818A1 (en) * | 2015-08-06 | 2017-06-29 | Zhejiang Sunny Optics Co., Ltd. | Ultra-wide-angle lens assembly |
| CN112099206A (en) * | 2020-11-23 | 2020-12-18 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| CN116027523A (en) * | 2022-12-29 | 2023-04-28 | 协益电子（苏州）有限公司 | Ultra-wide angle in-car monitoring lens |
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