CN114779438A - Built-in optical filter optical imaging system based on small-angle light passing - Google Patents
Built-in optical filter optical imaging system based on small-angle light passing Download PDFInfo
- Publication number
- CN114779438A CN114779438A CN202210445788.1A CN202210445788A CN114779438A CN 114779438 A CN114779438 A CN 114779438A CN 202210445788 A CN202210445788 A CN 202210445788A CN 114779438 A CN114779438 A CN 114779438A
- Authority
- CN
- China
- Prior art keywords
- lens
- spherical surface
- diam
- radius
- clear
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 37
- 238000012634 optical imaging Methods 0.000 title claims abstract description 26
- 238000003384 imaging method Methods 0.000 claims abstract description 23
- 230000004075 alteration Effects 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 claims description 49
- 239000006185 dispersion Substances 0.000 claims description 24
- 238000001228 spectrum Methods 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000004927 fusion Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- FEMOMIGRRWSMCU-UHFFFAOYSA-N ninhydrin Chemical compound C1=CC=C2C(=O)C(O)(O)C(=O)C2=C1 FEMOMIGRRWSMCU-UHFFFAOYSA-N 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Images
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
-
- 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
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to a built-in optical filter optical imaging system based on small-angle light passing, which comprises a first group of lenses, a filter and a second group of lenses, wherein the first group of lenses, the filter and the second group of lenses are sequentially arranged from an imaging surface to an object surface, the first group of lenses and the second group of lenses are used for completing imaging through refraction balance aberration of light, included angles between all light rays emitted by the second group of lenses and an optical axis are smaller than a set angle and are incident on the filter, and emergent light rays of the filter are coupled and imaged on the imaging surface through the first group of lenses. The invention uses the lens fusion filter to realize the spectrum function of each nm of the test wave band, so that the whole spectrum lens is integrated and miniaturized.
Description
Technical Field
The invention relates to an optical imaging system with a built-in optical filter based on small-angle light passing, and relates to the field of optical lens design.
Background
Due to the rapid development of modern science and technology, more and more fields need to combine a lens product to assemble a set of optical system, and then use an algorithm to realize the automatic measurement requirement.
As shown in fig. 1, the conventional lens design only needs to satisfy the required focal length, aperture and resolution, and the filter is disposed outside the lens. However, in accordance with the system integration requirement, the optical filter is also required to be arranged in the lens, and the volume of the imaging system can be reduced by arranging the optical filter in the lens, so that the portable and small-sized imaging system can be realized.
The current lens design does not consider how to implement a filter built in the lens.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide an optical imaging system with built-in filter based on small angle light passing, which can integrate and miniaturize the whole spectral lens.
In order to realize the purpose, the invention adopts the following technical scheme: the system comprises a first group of lenses, a filter and a second group of lenses which are sequentially arranged from an imaging surface to an object surface, wherein the first group of lenses and the second group of lenses are used for balancing aberration through refraction of light to finish imaging, included angles between all light rays emitted by the second group of lenses and an optical axis are smaller than a set angle and are incident on the filter, and emergent light rays of the filter are coupled and imaged on the imaging surface through the first group of lenses.
The built-in optical filter optical imaging system further comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from an imaging surface to an object surface; the second group of lenses includes a seventh lens and an eighth lens; the first lens and the second lens are spaced by 0.1mm, the third lens and the fourth lens are spaced by 15.9mm, the fourth lens and the fifth lens are spaced by 1.5mm, the fifth lens and the sixth lens are spaced by 0.3mm, the sixth lens and the seventh lens are spaced by 11mm, and the seventh lens and the eighth lens are spaced by 16.5 mm.
The optical imaging system with the built-in optical filter further comprises a first lens, wherein the refractive index of the first lens is larger than 1.70 and smaller than 1.75, the chromatic dispersion of the first lens is larger than 45 and smaller than 55, the first lens is a convex image-side spherical positive lens and comprises a first convex spherical surface and a second convex spherical surface, and the design parameters of the first convex spherical surface are as follows: radius: 77mm, Thickness: 49.2mm, Clear Diam: 27.65529mm, second convex spherical design parameters: radius: 108.8mm, Thickness: 3.7mm, Clear Diam: 27.52637 mm.
The optical imaging system with the built-in optical filter further comprises a second lens, wherein the refractive index of the second lens is larger than 1.70 and smaller than 1.75, the chromatic dispersion of the second lens is larger than 50 and smaller than 60, the second lens is a convex image-side spherical positive lens and comprises a third convex spherical surface and a fourth convex spherical surface, and the design parameters of the third convex spherical surface are as follows: radius: 31.6mm, Thickness: 0.1mm, Clear Diam: 26.56407 mm; design parameters of the fourth convex spherical surface: radius: 91.2mm, Thickness: 6.6mm, Clear Diam: 24.74111 mm.
The built-in filter optical imaging system further comprises a third lens, wherein the refractive index of the third lens is greater than 1.67 and smaller than 1.72, the chromatic dispersion of the third lens is greater than 50 and smaller than 60, the third lens comprises a fifth concave spherical surface and a sixth concave spherical surface, and the fifth concave spherical surface is designed according to the following parameters: radius: 23.2mm, Thickness: 2mm, Clear Diam: 21.99925 mm; design parameters of a sixth concave spherical surface: radius: 21.6mm, Thickness: 15.9mm, Clear Diam: 19.24685 mm.
The optical imaging system with a built-in filter further includes a fourth lens, a refractive index of which is greater than 1.55 and smaller than 1.60, a chromatic dispersion of which is greater than 35 and smaller than 45, the fourth lens is a concave image-side positive spherical lens and includes a seventh concave spherical surface and an eighth convex spherical surface, and the seventh concave spherical surface has design parameters: radius: 145.2mm, Thickness: 8.9mm, Clear Diam: 26.09403 mm; design parameters of the eighth convex spherical surface: radius: 76.1mm, Thickness: 1.5mm, Clear Diam: 27.27495 mm.
The optical imaging system with built-in optical filter further includes a fifth lens, a refractive index of which is greater than 1.74 and smaller than 1.79, a chromatic dispersion of which is greater than 20 and smaller than 30, the fifth lens is a positive concave image-side spherical lens, and includes a ninth concave spherical surface and a tenth convex spherical surface, and the design parameters of the ninth concave spherical surface are as follows: radius: 32.3mm, Thickness: 5.8mm, Clear Diam: 30.27504 mm; design parameters of the tenth convex surface spherical surface: radius: 252.2mm, Thickness: 0.3mm, Clear Diam: 32.53857 mm.
The optical imaging system with a built-in filter further includes a sixth lens, a refractive index of which is greater than 1.70 and smaller than 1.75, a chromatic dispersion of which is greater than 25 and smaller than 30, the sixth lens is a concave image-side positive spherical lens and includes an eleventh concave spherical surface and a twelfth convex spherical surface, and the eleventh concave spherical surface has design parameters: radius: 44.4mm, Thickness: 9.1mm, Clear Diam: 35.48572 mm; design parameters of the twelfth convex surface spherical surface: radius: 252.2mm, Thickness: 0.3mm, Clear Diam: 38.61559 mm.
The optical imaging system with a built-in optical filter further includes a seventh lens, a refractive index of which is greater than 1.75 and smaller than 1.80, a chromatic dispersion of which is greater than 45 and smaller than 55, the seventh lens is a negative concave image-side spherical lens and includes a thirteenth convex spherical surface and a fourteenth convex spherical surface, and design parameters of the thirteenth convex spherical surface are as follows: radius: 98.4mm, Thickness: 1mm, Clear Diam: 39.27086 mm; design parameters of a fourteenth convex surface sphere: radius: 1683.7mm, Thickness: 17.4mm, Clear Diam: 38.78884 mm.
The optical imaging system with the built-in filter further includes that a refractive index of the eighth lens is greater than 1.65 and smaller than 1.70, a chromatic dispersion is greater than 25 and smaller than 35, the eighth lens is a concave image-wise spherical negative lens, and includes a fifteenth concave spherical surface and a sixteenth concave spherical surface, and a fifteenth concave spherical surface design parameter: radius: 3878.5mm, Thickness:16.5mm, Clear Diam: 37.62764 mm; sixteenth concave spherical design parameters: radius: 80.8mm, Thickness: 17.6mm, Clear Diam: 36.94032 mm.
Due to the adoption of the technical scheme, the invention has the following characteristics: the invention needs to use a lens to fuse the optical filter, realizes the spectrum function of each nm of the testing wave band, and because the built-in optical filter can only ensure the light ray less than 7 degrees to pass through, and meanwhile, the optical filter needs to be positioned in the lens, and the built-in optical filter which allows the light of 7 degrees to pass through and has the thickness of about 13mm, the whole spectrum lens is integrated and miniaturized.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
fig. 1 is a diagram of a prior art optical lens LAYOUT.
Fig. 2 is a structural diagram of an optical imaging system with a built-in filter according to an embodiment of the present invention.
Fig. 3 is a diagram of fingerprint effect obtained by normal photography according to an embodiment of the present invention.
Fig. 4 is a diagram of fingerprint effects obtained by the hyperspectral lens according to the embodiment of the invention.
The reference numbers in the figures are:
1. a first group of lenses: 11. a first lens; 12. a second lens; 13. a third lens; 14. a fourth lens; 15. a fifth lens; 16. a sixth lens;
2. a light filter;
3. a second group of lenses: 31. a seventh lens; 32. and an eighth lens.
Detailed Description
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "upper", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
The invention provides a built-in optical filter optical imaging system based on small-angle light passing, which comprises a first group of lenses, an optical filter and a second group of lenses which are sequentially arranged from an imaging surface to an object surface, wherein the first group of lenses and the second group of lenses are used for balancing aberration through light refraction to finish imaging, included angles between all light rays emitted by the second group of lenses and an optical axis are smaller than a set angle and are incident to the optical filter, and emergent light rays of the optical filter are coupled and imaged on the imaging surface through the first group of lenses. The invention uses the lens fusion filter to realize the spectrum function of each nm of the test wave band, so that the whole spectrum lens is integrated and miniaturized.
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
If a built-in filter is needed in the lens, a reserved space needs to be arranged in the lens, the built-in filter requires that light rays can pass through the lens only when the light rays are smaller than a certain angle (for example, smaller than 7 degrees), otherwise, the light rays cannot pass through the built-in filter, if the built-in filter is needed to achieve the purpose of testing the spectrum, and the light ray angle needs to be considered and controlled during design.
As shown in fig. 2, in the optical imaging system with a built-in optical filter based on small-angle light passing provided by this embodiment, a space of the optical filter is reserved inside, and all angles of light rays at a reserved position need to be less than 7 degrees, in order to meet the use requirement of the optical filter, a first group of lenses 1, a filter 2 and a second group of lenses 3 are sequentially arranged from an imaging plane to an object plane, and the first group of lenses 1 and the second group of lenses 2 complete imaging through refraction balance aberration of light, thereby achieving the parameter requirement. All the included angles between the light rays emitted by the second group of lenses 3 and the optical axis are smaller than a set angle, the light rays are incident to the optical filter 2, and the light rays emitted by the optical filter 2 are coupled and imaged on an imaging surface through the first group of lenses 1.
The first group of lenses 1 comprises a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15 and a sixth lens 16 in sequence from the image side; the second group lens 3 includes a seventh lens 31 and an eighth lens 32. The distance between the first lens 11 and the second lens 12 is 0.1mm, the distance between the third lens 13 and the fourth lens 14 is 15.9mm, the distance between the fourth lens 14 and the fifth lens 15 is 1.5mm, the distance between the fifth lens 15 and the sixth lens 16 is 0.3mm, the distance between the sixth lens 15 and the seventh lens 31 is 11mm, and the distance between the seventh lens 31 and the eighth lens 32 is 16.5 mm.
All light rays emitted by the second group of lenses 2 and included angles of an optical axis are smaller than 7 degrees, namely incident light rays of the optical filter 2 are smaller than 7 degrees, and emergent light rays of the optical filter 2 are coupled and imaged on an imaging surface through the first group of lenses 1, so that the testing requirement is met.
In a preferred embodiment of the present invention, as shown in table 1, the first lens element 11 is a positive convex image-side spherical lens element, and includes a first convex spherical surface and a second convex spherical surface, wherein the first convex spherical surface has the following design parameters: radius: -77, Thickness: 49.2, Clear Diam (Clear aperture): 27.65529; design parameters of the second convex spherical surface: radius: 108.8, Thickness: 3.7, Clear Diam: 27.52637, the refractive index of the first lens 11 is greater than 1.70 and less than 1.75, the dispersion is greater than 45 and less than 55, where all relevant dimensional parameters are in mm.
In a preferred embodiment of the present invention, as shown in table 1, the second lens element 12 is a convex positive image-side spherical lens element, and includes a third convex spherical surface and a fourth convex spherical surface, and the design parameters of the third convex spherical surface are as follows: radius: 31.6, Thickness: 0.1, Clear Diam: 26.56407, respectively; design parameters of the fourth convex spherical surface: radius: 91.2, Thickness: 6.6, Clear Diam: 24.74111, the second lens 12 has a refractive index greater than 1.70 and less than 1.75, a dispersion greater than 50 and less than 60, where all relevant dimensional parameters are in mm.
In a preferred embodiment of the present invention, as shown in table 1, the third lens 13 is a concave image-side spherical positive lens, and includes a fifth concave spherical surface and a sixth concave spherical surface, and the design parameters of the fifth concave spherical surface are as follows: radius: -23.2, Thickness: 2, Clear Diam: 21.99925, respectively; design parameters of a sixth concave spherical surface: radius: 21.6, Thickness: 15.9, Clear Diam: 19.24685, the refractive index of the third lens 13 is greater than 1.67 and less than 1.72, the dispersion is greater than 50 and less than 60, where all relevant dimensional parameters are in mm.
In a preferred embodiment of the present invention, as shown in table 1, the fourth lens element 14 is a concave image-side spherical positive lens element, and includes a seventh concave spherical surface and an eighth convex spherical surface, and the design parameters of the seventh concave spherical surface are as follows: radius: 145.2, Thickness: 8.9, Clear Diam: 26.09403; design parameters of the eighth convex spherical surface: radius: 76.1, Thickness: 1.5, Clear Diam: 27.27495, the fourth lens 14 has a refractive index greater than 1.55 and less than 1.60, a dispersion greater than 35 and less than 45, wherein all relevant dimensional parameters are in mm.
In a preferred embodiment of the present invention, as shown in table 1, the fifth lens element 15 is a concave image-side spherical positive lens element, and includes a ninth concave spherical surface and a tenth convex spherical surface, and the design parameters of the ninth concave spherical surface are as follows: radius: 32.3, Thickness: 5.8, Clear Diam: 30.27504, respectively; design parameters of the tenth convex surface spherical surface: radius: 252.2, Thickness: 0.3, Clear Diam: 32.53857, the fifth lens has a refractive index greater than 1.74 and less than 1.79, a dispersion greater than 20 and less than 30, wherein all units related to the dimensional parameters are in mm.
In a preferred embodiment of the present invention, as shown in table 1, the sixth lens element 16 is a concave image-side spherical positive lens element, and includes an eleventh concave spherical surface and a twelfth convex spherical surface, and the design parameters of the eleventh concave spherical surface are as follows: radius: 44.4, Thickness: 9.1, Clear Diam: 35.48572, respectively; design parameters of the twelfth convex surface spherical surface: radius: 252.2, Thickness: 0.3, Clear Diam: 38.61559, the sixth lens 16 has a refractive index greater than 1.70 and less than 1.75, a dispersion greater than 25 and less than 30, wherein all relevant dimensional parameters are in mm.
In a preferred embodiment of the present invention, as shown in table 1, the seventh lens element 31 is a negative concave image-side spherical lens element, and includes a thirteenth convex spherical surface and a fourteenth convex spherical surface, and the design parameters of the thirteenth convex spherical surface are as follows: radius: 98.4, Thickness: 1Clear Diam: 39.27086; design parameters of a fourteenth convex surface sphere: radius: 1683.7, Thickness: 17.4Clear Diam: 38.78884, the seventh lens 31 has a refractive index greater than 1.75 and less than 1.80 and a dispersion greater than 45 and less than 55, wherein all relevant dimensional parameters are in mm.
In a preferred embodiment of the present invention, as shown in table 1, the eighth lens element 32 is a negative concave image-side spherical lens element, and includes a fifteenth concave spherical surface and a sixteenth concave spherical surface, wherein the fifteenth concave spherical surface has the following design parameters: radius: 3878.5, Thickness:16.5, Clear Diam: 37.62764, respectively; sixteenth concave spherical design parameter: radius: 80.8, Thickness: 17.6, Clear Diam: 36.94032, the eighth lens 31 has a refractive index greater than 1.65 and less than 1.70, a dispersion greater than 25 and less than 35, wherein all relevant dimensional parameters are in mm.
In a preferred embodiment of the present invention, the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, the sixth lens 16, the seventh lens 31, and the eighth lens 32 are all made of a glass material.
In a preferred embodiment of the invention, the angle in the filter 2 is less than 7 degrees based on the front optical path to ensure that the focal length of the imaging system meets the standard: EFFL: 60mm, FNO: f2.8, target surface size: 1 hour, BFL: 49.2 mm.
TABLE 1 parameters of the lenses
| Surf | Type | Radius | Thickness | Nd |
| Clear Diam | ||
| 1 | STANDARD | Infinity | 10 | 39.14901 | ||||
| 2 | STANDARD | -80.8 | 17.6 | 1.733501 | 51.779678 | 36.94032 | |
|
| 3 | STANDARD | 3878.5 | 16.5 | 37.62764 | ||||
| 4 | STANDARD | 1683.7 | 17.4 | 1.72916 | 54.499235 | 38.78884 | Seventh lens element | |
| 5 | STANDARD | -98.4 | 1 | 39.27086 | ||||
| 6 | STANDARD | Infinity | 10 | 38.61559 | ||||
| 7 | STANDARD | 44.4 | 9.1 | 1.691002 | 54.708408 | 35.48572 | Sixth lens element | |
| 8 | STANDARD | 252.2 | 0.3 | 32.53857 | ||||
| 9 | STANDARD | 32.3 | 5.8 | 1.57501 | 41.509668 | 30.27504 | Fifth lens element | |
| 10 | STANDARD | 76.1 | 1.5 | 27.27495 | ||||
| 11 | STANDARD | 145.2 | 8.9 | 1.761823 | 26.552048 | 26.09403 | |
|
| 12 | STANDARD | 21.6 | 15.9 | 19.24685 | ||||
| 13 | STANDARD | -23.2 | 2 | 1.728252 | 28.319563 | 21.99925 | |
|
| 14 | STANDARD | 91.2 | 6.6 | 1.7725 | 49.620227 | 24.74111 | |
|
| 15 | STANDARD | -31.6 | 0.1 | 26.56407 | ||||
| 16 | STANDARD | 108.8 | 3.7 | 1.68893 | 31.250146 | 27.52637 | First lens | |
| 17 | STANDARD | -77 | 49.2 | 27.65529 | ||||
| IMA | STANDARD | Infinity | 19.50551 |
The following describes the application of the built-in optical filter imaging system based on small angle light passing according to the present invention in detail by specific embodiments.
For example, 10 yuan RMB has sweat fingerprint with serious background interference, and after ninhydrin treatment, as shown in FIG. 3, the fingerprint effect obtained by common color photography is not ideal. The portable multispectral fusion hyper-spectral lens acquires spectral image data, and obtains more valuable line and line images by MISystem material evidence identification imaging spectral image analysis software and material evidence component analysis algorithm, as shown in figure 4.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In the description herein, references to the description of "one embodiment," "some implementations," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The system is characterized by comprising a first group of lenses, a filter and a second group of lenses which are sequentially arranged from an imaging plane to an object plane, wherein the first group of lenses and the second group of lenses are used for completing imaging through refraction balance aberration of light, included angles between all light rays emitted by the second group of lenses and an optical axis are smaller than a set angle and are incident on the filter, and emergent light rays of the filter are coupled and imaged on the imaging plane through the first group of lenses.
2. The built-in filter optical imaging system according to claim 1, wherein the first group of lenses includes, in order from an imaging plane to an object plane, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the second group of lenses includes a seventh lens and an eighth lens; the first lens and the second lens are spaced by 0.1mm, the third lens and the fourth lens are spaced by 15.9mm, the fourth lens and the fifth lens are spaced by 1.5mm, the fifth lens and the sixth lens are spaced by 0.3mm, the sixth lens and the seventh lens are spaced by 11mm, and the seventh lens and the eighth lens are spaced by 16.5 mm.
3. The filter-in optical imaging system of claim 2, wherein the first lens has a refractive index greater than 1.70 and less than 1.75, a dispersion greater than 45 and less than 55, and is a positive convex image-side spherical lens comprising a first convex spherical surface and a second convex spherical surface, the first convex spherical surface being designed with the parameters: radius: 77mm, Thickness: 49.2mm, Clear Diam: 27.65529mm, second convex spherical design parameters: radius: 108.8mm, Thickness: 3.7mm, Clear Diam: 27.52637 mm.
4. The filter-in optical imaging system of claim 2, wherein the second lens has a refractive index greater than 1.70 and less than 1.75, a dispersion greater than 50 and less than 60, and is a positive convex image-side spherical lens comprising a third convex spherical surface and a fourth convex spherical surface, and the third convex spherical surface has the design parameters: radius: 31.6mm, Thickness: 0.1mm, Clear Diam: 26.56407 mm; design parameters of the fourth convex spherical surface: radius: 91.2mm, Thickness: 6.6mm, Clear Diam: 24.74111 mm.
5. The filter-in optical imaging system according to claim 2, wherein said third lens has a refractive index greater than 1.67 and less than 1.72, a dispersion greater than 50 and less than 60, and comprises a fifth concave spherical surface and a sixth concave spherical surface, and wherein the fifth concave spherical surface design parameter is: radius: 23.2mm, Thickness: 2mm, Clear Diam: 21.99925 mm; design parameters of a sixth concave spherical surface: radius: 21.6mm, Thickness: 15.9mm, Clear Diam: 19.24685 mm.
6. The filter-in optical imaging system of claim 2, wherein the refractive index of the fourth lens is greater than 1.55 and less than 1.60, the chromatic dispersion is greater than 35 and less than 45, the fourth lens is a concave image-side spherical positive lens comprising a seventh concave spherical surface and an eighth convex spherical surface, and the seventh concave spherical surface has the design parameters: radius: 145.2mm, Thickness: 8.9mm, Clear Diam: 26.09403 mm; design parameters of the eighth convex spherical surface: radius: 76.1mm, Thickness: 1.5mm, Clear Diam: 27.27495 mm.
7. The filter-in optical imaging system of claim 2, wherein the refractive index of the fifth lens is greater than 1.74 and less than 1.79, the chromatic dispersion is greater than 20 and less than 30, the fifth lens is a concave image-side spherical positive lens and comprises a ninth concave spherical surface and a tenth convex spherical surface, and the ninth concave spherical surface has the design parameters: radius: 32.3mm, Thickness: 5.8mm, Clear Diam: 30.27504 mm; design parameters of the tenth convex surface spherical surface: radius: 252.2mm, Thickness: 0.3mm, Clear Diam: 32.53857 mm.
8. The filter-in optical imaging system of claim 2, wherein the sixth lens has a refractive index of greater than 1.70 and less than 1.75, a chromatic dispersion of greater than 25 and less than 30, and is a concave image-side spherical positive lens comprising an eleventh concave spherical surface and a twelfth convex spherical surface, and the eleventh concave spherical surface has the design parameters: radius: 44.4mm, Thickness: 9.1mm, Clear Diam: 35.48572 mm; design parameters of the twelfth convex spherical surface: radius: 252.2mm, Thickness: 0.3mm, Clear Diam: 38.61559 mm.
9. The filter-in optical imaging system of claim 2, wherein the refractive index of the seventh lens is greater than 1.75 and less than 1.80, the dispersion is greater than 45 and less than 55, the seventh lens is a negative concave image-wise spherical lens comprising a thirteenth convex spherical surface and a fourteenth convex spherical surface, the thirteenth convex spherical surface being designed with parameters: radius: 98.4mm, Thickness: 1mm, Clear Diam: 39.27086 mm; design parameters of a fourteenth convex spherical surface: radius: 1683.7mm, Thickness: 17.4mm, Clear Diam: 38.78884 mm.
10. The filter-in optical imaging system according to claim 2, wherein the refractive index of the eighth lens is greater than 1.65 and less than 1.70, the chromatic dispersion is greater than 25 and less than 35, the eighth lens is a concave image-wise spherical negative lens comprising a fifteenth concave spherical surface and a sixteenth concave spherical surface, and the fifteenth concave spherical surface has the design parameters: radius: 3878.5mm, Thickness:16.5mm, Clear Diam: 37.62764 mm; sixteenth concave spherical design parameter: radius: 80.8mm, Thickness: 17.6mm, Clear Diam: 36.94032 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210445788.1A CN114779438B (en) | 2022-04-26 | 2022-04-26 | Optical imaging system with built-in optical filter based on small-angle light passing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210445788.1A CN114779438B (en) | 2022-04-26 | 2022-04-26 | Optical imaging system with built-in optical filter based on small-angle light passing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114779438A true CN114779438A (en) | 2022-07-22 |
| CN114779438B CN114779438B (en) | 2024-02-06 |
Family
ID=82433477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210445788.1A Active CN114779438B (en) | 2022-04-26 | 2022-04-26 | Optical imaging system with built-in optical filter based on small-angle light passing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114779438B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120182464A1 (en) * | 2011-01-18 | 2012-07-19 | Primesense Ltd. | Objective optics with interference filter |
| CN110460757A (en) * | 2019-08-16 | 2019-11-15 | 广州星博科仪有限公司 | A kind of integrated spectrum pick-up lens and spectrum camera |
| CN211236414U (en) * | 2019-04-24 | 2020-08-11 | 公安部物证鉴定中心 | Relay lens for spectral imaging |
-
2022
- 2022-04-26 CN CN202210445788.1A patent/CN114779438B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120182464A1 (en) * | 2011-01-18 | 2012-07-19 | Primesense Ltd. | Objective optics with interference filter |
| CN211236414U (en) * | 2019-04-24 | 2020-08-11 | 公安部物证鉴定中心 | Relay lens for spectral imaging |
| CN110460757A (en) * | 2019-08-16 | 2019-11-15 | 广州星博科仪有限公司 | A kind of integrated spectrum pick-up lens and spectrum camera |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114779438B (en) | 2024-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108594407B (en) | Image pickup lens | |
| CN100437330C (en) | Auto-focusing optical system for camera module | |
| CN108535834B (en) | Optical lens and imaging apparatus | |
| CN114114654B (en) | Optical system, image capturing module and electronic equipment | |
| CN112987252A (en) | Optical system, infrared receiving module and electronic equipment | |
| CN112099205A (en) | Wide-angle lens | |
| CN116149023B (en) | Optical lens, camera module and electronic equipment | |
| CN114815181B (en) | Optical system, lens module and electronic equipment | |
| CN113946038A (en) | Optical lens, camera module and electronic equipment | |
| CN113900222B (en) | Optical system, image capturing module and electronic equipment | |
| CN109324385A (en) | Optical lens | |
| CN113156612B (en) | Optical system, image capturing module and electronic equipment | |
| CN109324384B (en) | Optical lens | |
| CN106842514B (en) | Camera lens | |
| CN113189748A (en) | Optical system, image capturing module and electronic equipment | |
| CN113219628A (en) | Optical system, image capturing module and electronic equipment | |
| CN114779438B (en) | Optical imaging system with built-in optical filter based on small-angle light passing | |
| CN114442271B (en) | Optical system, camera module and electronic equipment | |
| CN112925085B (en) | Optical system, image capturing module and electronic equipment | |
| WO2023206069A1 (en) | Optical imaging system with built-in optical filter based on small-angle light passing | |
| CN112198628B (en) | Optical imaging system, image capturing module with same and electronic device | |
| CN115268021A (en) | Optical system, image capturing module and terminal equipment | |
| CN110412717B (en) | Optical lens | |
| CN113075782A (en) | Optical system, camera module and electronic device | |
| CN221079035U (en) | Optical imaging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |