CN116360075A - Imaging lens - Google Patents
Imaging lens Download PDFInfo
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- CN116360075A CN116360075A CN202211239662.5A CN202211239662A CN116360075A CN 116360075 A CN116360075 A CN 116360075A CN 202211239662 A CN202211239662 A CN 202211239662A CN 116360075 A CN116360075 A CN 116360075A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 142
- 230000003287 optical effect Effects 0.000 claims abstract description 59
- 230000005499 meniscus Effects 0.000 claims abstract description 16
- 230000004075 alteration Effects 0.000 description 26
- 239000006059 cover glass Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 17
- 239000011521 glass Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 7
- 101100233058 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) IMA2 gene Proteins 0.000 description 2
- 101100075908 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) IMA3 gene Proteins 0.000 description 2
- 101100075910 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) IMA4 gene Proteins 0.000 description 2
- 101100179739 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) IMA5 gene Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 101100233050 Caenorhabditis elegans ima-1 gene Proteins 0.000 description 1
- 101100233056 Caenorhabditis elegans ima-2 gene Proteins 0.000 description 1
- 101100233059 Caenorhabditis elegans ima-3 gene Proteins 0.000 description 1
- 101000801088 Homo sapiens Transmembrane protein 201 Proteins 0.000 description 1
- 102100033708 Transmembrane protein 201 Human genes 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- 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
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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
- G02B13/0055—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
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
An imaging lens includes first, second, third, fourth, fifth and sixth lenses. The first lens is a meniscus lens with negative refractive power and comprises a convex surface facing the object side and a concave surface facing the image side. The second lens has refractive power and comprises a concave surface facing the object side. The third lens has refractive power and comprises a convex surface facing the image side. The fourth lens has refractive power and comprises a convex surface facing the image side. The fifth lens has refractive power. The sixth lens is a biconvex lens with positive refractive power. The imaging lens satisfies the condition: 87mm of 2 ≤fLL×TTL≤111mm 2 Or the condition: HFOV/fLL is less than or equal to 12 degrees/mm and less than or equal to 17 degrees/mm; which is a kind ofIn fLL, the effective focal length of the lens closest to the image side, TTL is the distance between the object side surface of the first lens element and the image plane along the optical axis, and HFOV is the half field of view of the image lens.
Description
Technical Field
The invention relates to an imaging lens.
Background
In addition to the development of the current imaging lens, along with the development of the large field of view, the imaging lens has the characteristics of miniaturization, high resolution and day-night confocal, and the current imaging lens cannot meet the current requirements, so that the imaging lens with another new architecture is required to meet the requirements of the large field of view, miniaturization, high resolution and day-night confocal simultaneously.
Disclosure of Invention
The invention aims to solve the technical problems of the imaging lens in the prior art, and provides an imaging lens which has larger field of view, shorter total length of the lens, higher resolution and day-night confocal, but still has good optical performance.
The invention provides an imaging lens which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens has negative refractive power, is a meniscus lens and comprises a convex surface facing the object side and a concave surface facing the image side. The second lens has refractive power and comprises a concave surface facing the object side. The third lens has refractive power and comprises a convex surface facing the image side. The fourth lens has refractive power, and the fourth lens comprises a convex surface facing the image side. The fifth lens has refractive power. The sixth lens has positive refractive power, is a biconvex lens, and comprises a convex surface facing the object side and another convex surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from an object side to an image side along an optical axis. The imaging lens satisfies the condition: 87mm of 2 ≤fLL×TTL≤111mm 2 Or the condition: HFOV/fLL is less than or equal to 12 degrees/mm and less than or equal to 17 degrees/mm; where fLL is the effective focal length of the lens closest to the image side, TTL is the distance between the object side surface of the first lens element and the image plane along the optical axis, and HFOV is the half field of view of the imaging lens.
The second lens element has a negative refractive power, and may further include another concave surface facing the image side, the third lens element has a positive refractive power, and may further include another convex surface facing the object side, the fourth lens element has a positive refractive power, and may further include another convex surface facing the object side, and the fifth lens element has a meniscus lens element having a positive refractive power, and includes a concave surface facing the object side and a convex surface facing the image side.
The imaging lens of the present invention may further include a seventh lens disposed between the sixth lens and the image side, wherein the seventh lens is a biconvex lens having a positive refractive power and including one convex surface facing the object side and the other convex surface facing the image side.
The second lens element has a negative refractive power, and may further include another concave surface facing the image side, the third lens element has a positive refractive power, and may further include another convex surface facing the object side, the fourth lens element has a biconvex lens element, and may further include another convex surface facing the object side, and the fifth lens element has a meniscus lens element, and includes a concave surface facing the object side and a convex surface facing the image side.
The second lens element has a positive refractive power, and may further include a convex surface facing the image side, the third lens element has a negative refractive power, and may further include a concave surface facing the object side, the fourth lens element has a biconvex lens element, and may further include another convex surface facing the object side, and the fifth lens element has a biconcave lens element, and includes a concave surface facing the object side and another concave surface facing the image side.
The eighth lens element may be disposed between the fifth lens element and the sixth lens element, wherein the eighth lens element has a meniscus refractive power and comprises a concave surface facing the object side and a convex surface facing the image side.
The second lens element may further include a biconcave lens element, the third lens element may further include a biconvex lens element, the fourth lens element may further include a meniscus lens element having a negative refractive power, the fifth lens element may further include a biconcave lens element, and the fifth lens element may further include a convex surface facing the object side and a convex surface facing the image side.
Wherein no air space is included between the second lens and the third lens, the combination of the second lens and the third lens has positive refractive power, no air space is included between the fifth lens and the eighth lens, and the combination of the fifth lens and the eighth lens has positive refractive power.
When the air interval is included between the fourth lens and the fifth lens, the fourth lens has positive refractive power, and the fifth lens has negative refractive power; when the air space is not included between the fourth lens and the fifth lens, the combination of the fourth lens and the fifth lens has positive refractive power.
The imaging lens of the present invention may further comprise an aperture stop disposed between the third lens element and the fifth lens element, wherein the imaging lens element satisfies at least one of the following conditions: -35 DEG/mm < HFOV/f1 < 23 DEG/mm; -22-2 fF/f-2; BFL/TTL is more than or equal to 0.16 and less than or equal to 0.19; TTL/T4 is 6.4-11.4; 0.5<BFL/T3<1.7；-7mm<f+f4<4mm；0.25<f/fR<0.38；5mm 2 <∣f1×f5∣<12mm 2 ；2mm<∣R21×R22/f2∣<10mm; vd1+Vd4 is more than or equal to 85 and less than or equal to 103; the HFOV is a half field of view of the imaging lens, TTL is a distance from an object side surface of the first lens element to an image side surface of the imaging lens element along the optical axis, BFL is a distance from an image side surface of the lens element closest to the image side surface of the imaging lens element along the optical axis, f is an effective focal length of the imaging lens element, f1 is an effective focal length of the first lens element, f2 is an effective focal length of the second lens element, f4 is an effective focal length of the fourth lens element, f5 is an effective focal length of the fifth lens element, R21 is a radius of curvature of the object side surface of the second lens element, R22 is a radius of curvature of the image side surface of the second lens element, T3 is a distance from the object side surface of the third lens element to the image side surface of the third lens element along the optical axis, T4 is a combined effective focal length of the lens element from the object side surface of the fourth lens element to the aperture, fR is a combined effective focal length of the lens element between the object side and the image side, vd1 is an abbe coefficient of the first lens element, and Vd4 is an abbe coefficient of the fourth lens element.
The imaging lens provided by the invention has the following beneficial effects: the lens has the advantages of larger field of view, shorter total length of the lens, higher resolution and day-night confocal, but still has good optical performance.
Drawings
Fig. 1 is a schematic view of a lens arrangement and an optical path of a first embodiment of an imaging lens according to the present invention.
Fig. 2A, 2B, and 2C are longitudinal aberration (Longitudinal Aberration), field Curvature (Field) and Distortion (displacement) diagrams of a first embodiment of an imaging lens according to the present invention.
Fig. 3 is a schematic diagram of a lens arrangement and an optical path of a second embodiment of an imaging lens according to the present invention.
Fig. 4A, 4B, 4C are longitudinal aberration diagrams, field curvature diagrams, distortion diagrams of a second embodiment of an imaging lens according to the present invention.
Fig. 5 is a schematic diagram of a lens arrangement and an optical path of a third embodiment of an imaging lens according to the present invention.
Fig. 6A, 6B, and 6C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams of a third embodiment of an imaging lens according to the present invention.
Fig. 7 is a schematic diagram of a lens arrangement and an optical path of a fourth embodiment of an imaging lens according to the present invention.
Fig. 8A, 8B, 8C are longitudinal aberration diagrams, field curvature diagrams, distortion diagrams of a fourth embodiment of an imaging lens according to the present invention.
Fig. 9 is a schematic diagram of a lens arrangement and an optical path of a fifth embodiment of an imaging lens according to the present invention.
Fig. 10A, 10B, and 10C are longitudinal aberration diagrams, field curvature diagrams, and distortion diagrams of a fifth embodiment of an imaging lens according to the present invention.
Detailed Description
The present invention provides an imaging lens including: the first lens has negative refractive power, is a meniscus lens and comprises a convex surface facing the object side and a concave surface facing the image side; the second lens has refractive power, and the second lens comprises a concave surface facing the object side; the third lens has refractive power, and the third lens comprises a convex surface facing the image side; the fourth lens has refractive power, and the fourth lens comprises a convex surface facing the image side; the fifth lens has refractive power; the sixth lens has positive refractive power, is a biconvex lens and comprises a convex surface facing the object side and another convex surface facing the image side; wherein one of the second lens and the third lens has positive refractive power; wherein one of the fourth lens and the fifth lens has positive refractive power; the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from an object side to an image side along an optical axis; wherein the imaging lens satisfies the condition: 87mm of 2 ≤fLL×TTL≤111mm 2 Or the condition: 1HFOV/fLL is less than or equal to 2 degrees/mm and less than or equal to 17 degrees/mm; where fLL is the effective focal length of the lens closest to the image side, TTL is the distance between the object side surface of the first lens element and the image plane along the optical axis, and HFOV is the half field of view of the imaging lens.
Please refer to the following table one, table two, table four, table five, table seven, table eight, table ten, table eleven, table thirteen and table fourteen, wherein table one, table four, table seven, table ten and table thirteen are the related parameter tables of each lens of the first embodiment to the fifth embodiment of the imaging lens according to the present invention, and table two, table five, table eight, table eleven and table fourteen are the related parameter tables of the aspherical surface of the aspherical lens in table one, table four, table seven, table ten and table thirteen respectively.
Fig. 1, 3, 5, 7 and 9 are lens configurations and optical paths of the first, second, third, fourth and fifth embodiments of the imaging lens of the present invention, respectively. The first lenses L11, L21, L31, L41, L51 are meniscus lenses with negative refractive power, and are made of glass, the object side surfaces S11, S21, S31, S41, S51 are convex surfaces and spherical surfaces, and the image side surfaces S12, S22, S32, S42, S52 are concave surfaces and spherical surfaces.
The second lenses L12, L22, L32, L42, L52 are made of glass, the object-side surfaces S13, S23, S33, S43, S53 are concave surfaces, and the object-side surfaces S13, S23, S33, S43, S53 and the image-side surfaces S14, S24, S34, S44, S54 are spherical surfaces.
The third lenses L13, L23, L33, L43, L53 are made of glass, the image sides S16, S26, S36, S46, S55 are convex, and the object sides S15, S25, S35, S45, S54 and the image sides S16, S26, S36, S46, S55 are spherical surfaces.
The fourth lenses L14, L24, L34, L44, L54 are made of glass, and the image sides S19, S28, S38, S49, S58 are convex, and the object sides S18, S27, S37, S48, S56 and the image sides S19, S28, S38, S49, S57 are spherical surfaces.
The fifth lenses L15, L25, L35, L45, L55 have refractive powers made of glass materials, and the object-side surfaces S110, S28, S38, S49, S59 and the image-side surfaces S111, S29, S39, S410, S510 are spherical surfaces.
The sixth lenses L16, L26, L36, L46, and L56 are biconvex lenses having positive refractive power, and the object sides S112, S210, S310, S411, and S512 are convex, and the image sides S113, S211, S311, S412, and S513 are convex.
The above design makes the imaging lens 1, 2, 3, 4, 5 effectively reduce the total length of the lens, effectively improve the resolution, effectively correct the aberration, and make the lens have the characteristic of day-night confocal, and the design that the spherical lens material is glass and the aspherical lens material is plastic is helpful for reducing the total length of the lens, improving the resolution, correcting the aberration, and the effect of day-night confocal, in addition, the imaging lens 1, 2, 3, 4, 5 can satisfy at least one of the following conditions:
-35 DEG/mm < HFOV/f1 < 23 DEG/mm; (1)
85≤Vd1+Vd4≤103； (2)
-22≤fF/f≤-2； (3)
0.16≤BFL/TTL≤0.19； (4)
6.4≤TTL/T4≤11.4； (5)
0.5<BFL/T3<1.7； (6)
-7mm<f+f4<4mm； (7)
0.25<f/fR<0.38； (8)
5mm 2 <∣f1×f5∣<12mm 2 ； (9)
2mm<∣R21×R22/f2∣<10mm； (10)
87mm 2 ≤fLL×TTL≤111mm 2 ； (11)
HFOV/fLL is less than or equal to 12 degrees/mm and less than or equal to 17 degrees/mm; (12)
Wherein HFOV is a half field of view of the imaging lenses 1, 2, 3, 4, 5 in the first to fifth embodiments, TTL is a distance between the object side surfaces S11, S21, S31, S41, L51 of the first lenses L11, L21, L31, L41, L51 to the imaging surfaces IMA1, IMA2, IMA3, IMA4, IMA5 along the optical axes OA1, OA2, OA3, OA4, OA5, BFL is a distance between the image side surfaces S113, S213, S313, S414, S515 of the lenses L16, L27, L37, L57 in the first to fifth embodiments, IMA2, IMA3, IMA4, IMA5 along the optical axes OA1, OA2, OA3, OA4, OA5, f is an effective focal length of the lenses 1, 2, 3, OA4, OA5 in the first to fifth embodiments, L31, L51 in the first to fifth embodiments, f2 is the effective focal length of the second lenses L12, L22, L32, L42, L52 in the first to fifth embodiments, f4 is the effective focal length of the fourth lenses L14, L24, L34, L44, L54 in the first to fifth embodiments, f5 is the effective focal length of the fifth lenses L15, L25, L35, L45, L55 in the first to fifth embodiments, R21 is the radius of curvature of the object side surfaces S13, S23, S33, S43, S53 in the first to fifth embodiments, R22 is the radius of curvature of the image side surfaces S14, S24, S34, S54 in the first to fifth embodiments, vd1 is the coefficient of curvature of the first to fifth lenses L12, L22, L32, L42, L52 in the first to fifth embodiments, and the abbe coefficient of the first lenses L21, L31, L41, L34, L54 in the fourth to fourth embodiments, t3 is a pitch along the optical axes OA1, OA2, OA3, OA4, OA5 of the first to fifth embodiments, T4 is a pitch along the optical axes OA1, OA2, OA3, OA4, OA5 of the object sides S15, S25, S35, S45, S54 of the third lenses L13, L23, L33, L43, L53, and the object sides S18, S27, S37, S48, S56 of the fourth lenses L14, L24, L34, L44, L54, and the image sides S19, S28, S38, S49, S57 of the fourth lenses L14, L24, L34, L44, L54, fF is the combined effective focal length of the lenses from the object side to the diaphragms ST1, ST2, ST3, ST4, ST5 in the first to fifth embodiments, fR is the combined effective focal length of the lenses from the diaphragms ST1, ST2, ST3, ST4, ST5 to the image side in the first to fifth embodiments, fLL is the effective focal length of the lenses L16, L27, L37, L47, L57 closest to the image side in the first to fifth embodiments.
When the condition (1) is satisfied: when the angle of the HFOV/f1 is less than or equal to 35 degrees/mm and less than or equal to-23 degrees/mm, the refractive power of the first lens can be effectively reduced, which is beneficial to the manufacture of the first lens; when the condition (2) is satisfied: when Vd1+Vd4 is not less than 85 and not more than 103, aberration can be effectively reduced, and image quality is improved; when the condition (3) is satisfied: when fF/f is less than or equal to-22 and less than or equal to-2, the relative illumination of the imaging lens can be effectively improved; when the condition (4) is satisfied: when BFL/TTL is more than or equal to 0.16 and less than or equal to 0.19, the back focal length can be effectively increased, and the imaging lens manufacturing is facilitated; when the condition (5) is satisfied: when TTL/T4 is more than or equal to 6.4 and less than or equal to 11.4, the influence of the ambient temperature on the image quality can be effectively reduced, and the imaging lens manufacturing is facilitated; when the condition (6) is satisfied: 0.5<BFL/T3<1.7, the manufacturing sensitivity can be effectively reduced to improve the image quality; when the condition (7) is satisfied: -7mm<f+f4<When the thickness is 4mm, the influence of the ambient temperature on the image quality can be effectively reduced, and the imaging lens manufacturing is facilitated; when the condition (8) is satisfied: 0.25<f/fR<0.38, the angle of the chief ray can be effectively reduced to meet the requirement of the image sensor; when the condition (9) is satisfied: 5mm of 2 <∣f1×f5∣<12mm 2 In this case, the manufacturing sensitivity can be effectively reduced to improve the image quality; when the condition (10) is satisfied: 2mm of<∣R21×R22/f2∣<When the thickness is 10mm, the manufacturing yield of the imaging lens can be effectively improved; when the condition (11) is satisfied: 87mm of 2 ≤fLL×TTL≤111mm 2 During the process, field curvature can be effectively reduced, and the performance is improved; when the condition (12) is satisfied: when the HFOV/fLL is less than or equal to 12 degrees/mm and less than or equal to 17 degrees/mm, the lens closest to the image side can be manufactured, and the performance is improved.
A first embodiment of the imaging lens of the present invention will now be described in detail. Referring to fig. 1, the imaging lens 1 includes a first lens L11, a second lens L12, a third lens L13, an aperture stop ST1, a fourth lens L14, a fifth lens L15, a sixth lens L16, an optical filter OF1, and a cover glass CG1. The first lens L11, the second lens L12, the third lens L13, the stop ST1, the fourth lens L14, the fifth lens L15, the sixth lens L16, the filter OF1, and the cover glass CG1 are arranged in order from the object side to the image side along the optical axis OA 1. In imaging, light from the object side is finally imaged on the imaging plane IMA 1. According to the first to eighth paragraphs [ detailed description ], wherein: the second lens L12 is a biconcave lens with negative refractive power, and the image-side surface S14 thereof is concave; the third lens L13 is a biconvex lens with positive refractive power, and the object side surface S15 is a convex surface; the fourth lens L14 is a biconvex lens with positive refractive power, and the object side surface S18 is a convex surface; the fifth lens element L15 with negative refractive power has a concave object-side surface S110 and a convex image-side surface S111; the sixth lens element L16 with aspheric surfaces on the object-side surface S112 and the image-side surface S113; the optical filter OF1 has object side surfaces S114 and image side surface S115, and the cover glass CG1 has object side surface S116 and image side surface S117; by utilizing the lens, the aperture ST1 and the design meeting at least one of the conditions (1) to (12), the imaging lens 1 can effectively reduce the total length of the lens, effectively improve the resolution and effectively correct the aberration. Table one is a table of relevant parameters for each lens of the imaging lens 1 in fig. 1.
List one
The aspherical surface dishing degree z of the surface aspherical lens is obtained by the following formula:
z＝ch 2 /{1+[1-(k+1)c 2 h 2 ] 1/2 }+Ah 4 +Bh 6 +Ch 8 +Dh 10 +Eh 12 +Fh 14
wherein: c: curvature; h: a vertical distance from any point of the lens surface to the optical axis; k: a conic coefficient; A-F: aspheric coefficients.
The second table is a table of related parameters of the aspherical surface of the aspherical lens in the first table.
Watch II
The third table is the related parameter values of the imaging lens 1 of the first embodiment and the calculated values corresponding to the conditions (1) to (12), and it can be seen from the third table that the imaging lens 1 of the first embodiment can meet the requirements of the conditions (1) to (12).
Watch III
In addition, the optical performance of the imaging lens 1 of the first embodiment can also meet the requirements. As can be seen from fig. 2A, the imaging lens 1 of the first embodiment has a longitudinal aberration of between-0.03 mm and 0.01 mm. As can be seen from fig. 2B, the imaging lens 1 of the first embodiment has a curvature of field between-0.04 mm and 0.02 mm. As can be seen from fig. 2C, the imaging lens 1 of the first embodiment has a distortion between-30% and 0%. It is apparent that the longitudinal aberration, curvature of field, distortion of the imaging lens 1 of the first embodiment can be effectively corrected, resulting in a better optical performance.
A second embodiment of the imaging lens of the present invention will now be described in detail. Referring to fig. 3, the imaging lens 2 includes a first lens L21, a second lens L22, a third lens L23, an aperture stop ST2, a fourth lens L24, a fifth lens L25, a sixth lens L26, a seventh lens L27, an optical filter OF2, and a cover glass CG2. The first lens L21, the second lens L22, the third lens L23, the fourth lens L24, the fifth lens L25, the sixth lens L26, the seventh lens L27, the filter OF2, and the cover glass CG2 are arranged in order from the object side to the image side along the optical axis OA 2. The object side surface S27 of the fourth lens L24 is coated with an opaque material to serve as the aperture ST2. In imaging, light from the object side is finally imaged on the imaging plane IMA 2. According to the first to eighth paragraphs [ detailed description ], wherein: the second lens L22 is a biconcave lens with negative refractive power, and the image-side surface S24 thereof is concave; the third lens L23 is a biconvex lens having positive refractive power, and the object side surface S25 thereof is a convex surface; the fourth lens L24 is a biconvex lens with positive refractive power, and the object side surface S27 is a convex surface; the fifth lens element L25 has a negative refractive power, wherein an object-side surface S28 thereof is concave, and an image-side surface S29 thereof is convex; the fourth lens L24 and the fifth lens L25 are glued or have no air space therebetween, and the glued lens of the combination of the fourth lens L24 and the fifth lens L25 has positive refractive power and has a focal length of 11.382mm; the sixth lens element L26 with spherical surfaces on both the object-side surface S210 and the image-side surface S211 is made of glass material; the seventh lens element L27 with positive refractive power is a biconvex lens element, and is made of plastic material, wherein the object-side surface S212 is convex, the image-side surface S213 is convex, and both the object-side surface S212 and the image-side surface S213 are aspheric surfaces; the object side surface S214 and the image side surface S215 OF the optical filter OF2 are both plane surfaces; the object side surface S216 and the image side surface S217 of the protecting glass CG2 are both plane surfaces; by utilizing the lens and the design at least meeting one of the conditions (1) to (12), the imaging lens 2 can effectively reduce the total length of the lens, effectively improve the resolution and effectively correct the aberration. Table four is a table of relevant parameters for each lens of the imaging lens 2 in fig. 3.
Table four
The definition of the concave degree z of the aspherical surface of the aspherical lens in table four is the same as that of the first embodiment, and will not be described here again. Table five is a table of relevant parameters for the aspherical surface of the aspherical lens in table four.
TABLE five
| Surface serial number | k | A | B | C | D | E | F |
| S212 | 0 | -1.32E-02 | 1.06E-03 | -1.12E-03 | 8.39E-04 | -5.53E-04 | 1.08E-04 |
| S213 | 0 | -2.36E-03 | 6.92E-04 | -7.20E-05 | -4.66E-05 | -8.42E-05 | 2.39E-05 |
The sixth table is the relevant parameter values of the imaging lens 2 of the second embodiment and the calculated values corresponding to the conditions (1) to (12), and it can be seen from the sixth table that the imaging lens 2 of the second embodiment can meet the requirements of the conditions (1) to (12).
TABLE six
In addition, the optical performance of the imaging lens 2 of the second embodiment can also meet the requirements. As can be seen from fig. 4A, the imaging lens 2 of the second embodiment has a longitudinal aberration of between-0.005 mm and 0 mm. As can be seen from fig. 4B, the imaging lens 2 of the second embodiment has a curvature of field between-0.01 mm and 0.02 mm. As can be seen from fig. 4C, the imaging lens 2 of the second embodiment has a distortion between-20% and 0%. It is apparent that the longitudinal aberration, curvature of field, and distortion of the imaging lens 2 of the second embodiment can be effectively corrected, resulting in better optical performance.
A third embodiment of the imaging lens of the present invention will now be described in detail. Referring to fig. 5, the imaging lens 3 includes a first lens L31, a second lens L32, a third lens L33, an aperture stop ST3, a fourth lens L34, a fifth lens L35, a sixth lens L36, a seventh lens L37, an optical filter OF3, and a cover glass CG3. The first lens L31, the second lens L32, the third lens L33, the fourth lens L34, the fifth lens L35, the sixth lens L36, the seventh lens L37, the filter OF3, and the cover glass CG3 are arranged in order from the object side to the image side along the optical axis OA 3. The object side surface S37 of the fourth lens L34 is coated with an opaque material to serve as an aperture ST3. In imaging, light from the object side is finally imaged on the imaging plane IMA 3. According to the first to eighth paragraphs [ detailed description ], wherein: the second lens L32 is a biconcave lens having a negative refractive power, and the image-side surface S34 thereof is a concave surface; the third lens L33 is a biconvex lens having positive refractive power, and the object side surface S35 thereof is a convex surface; the fourth lens L34 is a biconvex lens with positive refractive power, and the object side surface S37 thereof is a convex surface; the fifth lens element L35 with negative refractive power has a concave object-side surface S38 and a convex image-side surface S39; the fourth lens L34 and the fifth lens L35 are glued or have no air space therebetween, and the glued lens combined by the fourth lens L34 and the fifth lens L35 has positive refractive power and has a focal length of 11.285mm; the sixth lens element L36 with spherical surfaces on both the object-side surface S310 and the image-side surface S311 is made of glass material; the seventh lens element L37 with positive refractive power is made of plastic material, wherein an object-side surface S312 is convex, an image-side surface S313 is convex, and both the object-side surface S312 and the image-side surface S313 are aspheric; the optical filter OF3 has object side S314 and image side S315 and the cover glass CG3 has object side S316 and image side S317 both planar; by utilizing the lens and the design meeting at least one of the conditions (1) to (12), the imaging lens 3 can effectively reduce the total length of the lens, effectively improve the resolution and effectively correct the aberration.
Table seven is a table of relevant parameters for each lens of the imaging lens 3 in fig. 5.
Watch seven
The definition of the aspherical surface dishing z of the aspherical lens in table seven is the same as that of the first embodiment, and will not be described here.
Table eight is a table of relevant parameters for the aspherical surface of the aspherical lens in table seven.
Table eight
| Surface serial number | k | A | B | C | D | E | F |
| S312 | 0 | -9.88E-03 | -1.18E-03 | 4.15E-04 | -8.58E-05 | 5.07E-04 | -1.51E-04 |
| S313 | 0 | -1.61E-03 | -5.93E-04 | 4.24E-04 | 4.92E-04 | 1.57E-04 | -6.21E-05 |
The table nine is the relevant parameter values of the imaging lens 3 of the third embodiment and the calculated values corresponding to the conditions (1) to (12), and it is known from the table nine that the imaging lens 3 of the third embodiment can meet the requirements of the conditions (1) to (12).
Table nine
In addition, the optical performance of the imaging lens 3 of the third embodiment can also meet the requirements. As can be seen from fig. 6A, the imaging lens 3 of the third embodiment has a longitudinal aberration of between-0.01 mm and 0.015 mm. As can be seen from fig. 6B, the imaging lens 3 of the third embodiment has a curvature of field between-0.03 mm and-0.005 mm. As can be seen from fig. 6C, the imaging lens 3 of the third embodiment has a distortion between-20% and 0%. It is apparent that the longitudinal aberration, curvature of field, and distortion of the imaging lens 3 of the third embodiment can be effectively corrected, resulting in a preferable optical performance.
A fourth embodiment of the imaging lens of the present invention will now be described in detail. Referring to fig. 7, the imaging lens 4 includes a first lens L41, a second lens L42, a third lens L43, an aperture stop ST4, a fourth lens L44, a fifth lens L45, a sixth lens L46, a seventh lens L47, an optical filter OF4, and a cover glass CG4. The first lens L41, the second lens L42, the third lens L43, the aperture stop ST4, the fourth lens L44, the fifth lens L45, the sixth lens L46, the seventh lens L47, the filter OF4, and the cover glass CG4 are arranged in order from the object side to the image side along the optical axis OA 4. In imaging, light from the object side is finally imaged on the imaging plane IMA 4. According to the first to eighth paragraphs [ detailed description ], wherein: the second lens L42 is a meniscus lens having a positive refractive power, and the image side surface S44 thereof is a convex surface; the third lens L43 has a negative refractive power, and an object-side surface S45 thereof is a concave surface; the fourth lens L44 is a biconvex lens with positive refractive power, and the object-side surface S48 thereof is a convex surface; the fifth lens element L45 with negative refractive power has a concave object-side surface S49 and a concave image-side surface S410; the fourth lens L44 and the fifth lens L45 are glued or have no air space therebetween, and the glued lens of the fourth lens L44 and the fifth lens L45 has negative refractive power, and the focal length of the glued lens is-2206 mm; the sixth lens element L46 with spherical surfaces on the object-side surface S411 and the image-side surface S412; the seventh lens element L47 with positive refractive power has a convex object-side surface S413 and a convex image-side surface S414, wherein the object-side surface S413 and the image-side surface S414 are both aspheric; the optical filter OF4 has object side surfaces S415 and S416 and the cover glass CG4 has object side surface S417 and S418 both OF which are planar; by utilizing the lens, the aperture ST4 and the design meeting at least one of the conditions (1) to (12), the imaging lens 4 can effectively reduce the total length of the lens, effectively improve the resolution and effectively correct the aberration. Table ten is a table of relevant parameters for each lens of the imaging lens 4 in fig. 7.
Ten meters
The definition of the aspherical surface dishing degree z of the aspherical lens in table ten is the same as that of the first embodiment, and will not be described here.
Table eleven is a table of related parameters of the aspherical surface of the aspherical lens in table ten.
Table eleven
| Surface serial number | k | A | B | C | D | E | F |
| S413 | 0 | -1.32E-02 | 1.06E-03 | -1.12E-03 | 8.39E-04 | -5.53E-04 | 1.08E-04 |
| S414 | 0 | -2.36E-03 | 6.92E-04 | -7.20E-05 | -4.66E-05 | -8.42E-05 | 2.39E-05 |
The twelfth table indicates the values of the related parameters of the imaging lens 4 of the fourth embodiment and the calculated values corresponding to the conditions (1) to (12), and it can be seen from the twelfth table that the imaging lens 4 of the fourth embodiment can meet the requirements of the conditions (1) to (12).
Twelve watches
In addition, the optical performance of the imaging lens 4 of the fourth embodiment can also meet the requirements. As can be seen from fig. 8A, the imaging lens 4 of the fourth embodiment has a longitudinal aberration of between-0.005 mm and 0 mm. As can be seen from fig. 8B, the imaging lens 4 of the fourth embodiment has a curvature of field of between-0.04 mm and 0 mm. As can be seen from fig. 8C, the imaging lens 4 of the fourth embodiment has a distortion between-20% and 0%. It is apparent that the longitudinal aberration, curvature of field, and distortion of the imaging lens 4 of the fourth embodiment can be effectively corrected, resulting in a preferable optical performance.
A fifth embodiment of the imaging lens of the present invention will now be described in detail. Referring to fig. 9, the imaging lens 5 includes a first lens L51, a second lens L52, a third lens L53, a fourth lens L54, an aperture stop ST5, a fifth lens L55, an eighth lens L58, a sixth lens L56, a seventh lens L57, an optical filter OF5, and a cover glass CG5. The first lens L51, the second lens L52, the third lens L53, the fourth lens L54, the stop ST5, the fifth lens L55, the eighth lens L58, the sixth lens L56, the seventh lens L57, the filter OF5, and the cover glass CG5 are arranged in order from the object side to the image side along the optical axis OA 5. In imaging, light from the object side is finally imaged on the imaging plane IMA 5. According to the first to eighth paragraphs [ detailed description ], wherein: the second lens L52 is a biconcave lens having a negative refractive power, and an image-side surface S54 thereof is a concave surface; the third lens L53 is a biconvex lens having positive refractive power, and the object-side surface S54 thereof is a convex surface; the second lens L52 and the third lens L53 are glued or no air space exists between the two, and the glued lens combined by the second lens L52 and the third lens L53 has positive refractive power and has a focal length of 8.718mm; the fourth lens element L54 has a negative refractive power, and an object-side surface S56 thereof is concave; the fifth lens element L55 with positive refractive power has a convex object-side surface S59 and a convex image-side surface S510; the eighth lens element L58 with negative refractive power is made of glass material, and has a concave object-side surface S510 and a convex image-side surface S511, wherein the object-side surface S510 and the image-side surface S511 are both spherical surfaces; the bonding lens of the combination of the fifth lens L55 and the eighth lens L58 has positive refractive power and a focal length of 7.497mm, wherein the bonding lens between the fifth lens L55 and the eighth lens L58 does not comprise an air space therebetween; the sixth lens element L56 with spherical surfaces on the object-side surface S512 and the image-side surface S513 is made of glass material; the seventh lens element L57 with positive refractive power is made of plastic material, wherein the object-side surface S514 is convex, the image-side surface S515 is convex, and both the object-side surface S514 and the image-side surface S515 are aspheric surfaces; the object side surface S516 and the image side surface S517 OF the optical filter OF5 are both planes; the object side surface S518 and the image side surface S519 of the protecting glass CG5 are both planes; by utilizing the lens, the aperture ST5 and the design at least meeting one of the conditions (1) to (12), the imaging lens 5 can effectively reduce the total length of the lens, effectively improve the resolution and effectively correct the aberration.
Table thirteen is a table of relevant parameters for each lens of the imaging lens 5 in fig. 9.
Watch thirteen
The definition of the aspherical surface dishing z of the aspherical lens in table thirteen is the same as that of the aspherical lens in the first embodiment, and is not described here. Table fourteen is a table of related parameters of the aspherical surface of the aspherical lens in table thirteen.
Fourteen watch
The fifteenth table indicates the values of the related parameters of the imaging lens 5 of the fifth embodiment and the calculated values corresponding to the conditions (1) to (12), and it is known from the fifteenth table that the imaging lens 5 of the fifth embodiment can meet the requirements of the conditions (1) to (12).
Table fifteen
In addition, the optical performance of the imaging lens 5 of the fifth embodiment can also meet the requirements. As can be seen from fig. 10A, the imaging lens 5 of the fifth embodiment has a longitudinal aberration of between-0.005 mm and 0 mm. As can be seen from fig. 10B, the imaging lens 5 of the fifth embodiment has a curvature of field between-0.03 mm and 0.02 mm. As can be seen from fig. 10C, the imaging lens 5 of the fifth embodiment has a distortion between-20% and 0%. It is apparent that the longitudinal aberration, curvature of field, and distortion of the imaging lens 5 of the fifth embodiment can be effectively corrected, resulting in a preferable optical performance.
A sixth embodiment of the imaging lens of the present invention will now be described in detail. The lens configuration of the imaging lens of the sixth embodiment is similar to that of the first embodiment, and therefore illustration thereof is omitted, and the difference is that the fourth lens and the fifth lens of the imaging lens are cemented, and the fourth lens and the fifth lens of the imaging lens 1 are not cemented, but in the following description, the reference numerals of the sixth embodiment will be used for convenience. The imaging lens includes a first lens L61, a second lens L62, a third lens L63, an aperture stop ST6, a fourth lens L64, a fifth lens L65, a sixth lens L66, an optical filter OF6, and a cover glass CG6. The first lens L61, the second lens L62, the third lens L63, the stop ST6, the fourth lens L64, the fifth lens L65, the sixth lens L66, the filter OF6, and the cover glass CG6 are arranged in order from the object side to the image side along the optical axis OA 6. In imaging, light from the object side is finally imaged on the imaging plane IMA 6. According to the first to eighth paragraphs [ detailed description ], wherein: the second lens L62 is a biconcave lens having a negative refractive power, and an image-side surface S64 thereof is a concave surface; the third lens L63 is a biconvex lens having positive refractive power, and the object side surface S65 thereof is a convex surface; the fourth lens L64 is a biconvex lens having a positive refractive power, and the object-side surface S68 thereof is a convex surface; the fifth lens element L65 has a negative refractive power, wherein an object-side surface S69 thereof is concave, and an image-side surface S610 thereof is convex; the fourth lens L64 and the fifth lens L65 are glued or there is no air space between them, and the glued lens of the fourth lens L64 and the fifth lens L65 combination has positive refractive power; the sixth lens element L66 with aspheric surfaces on the object-side surface S611 and the image-side surface S612; the optical filter OF6 has object side S613 and image side S614, and the cover glass CG6 has object side S615 and image side S616 both planar; by utilizing the lens, the aperture ST6 and the design meeting at least one of the conditions (1) to (12), the imaging lens can effectively reduce the total length of the lens, effectively improve the resolution and effectively correct the aberration. Table sixteen is a table of relevant parameters for each lens of the imaging lens.
Sixteen watch
The definition of the aspherical surface dishing z of the aspherical lens in table sixteen is the same as that of the aspherical lens in the first embodiment, and is not described here again.
Table seventeen is a table of relevant parameters for the aspherical surface of the aspherical lens in table sixteen.
Seventeen of the table
| Surface serial number | k | A | B | C | D | E | F |
| S611 | 0 | -1.32E-02 | 1.06E-03 | -1.12E-03 | 8.39E-04 | -5.53E-04 | 1.08E-04 |
| S612 | 0 | -2.36E-03 | 6.92E-04 | -7.20E-05 | -4.66E-05 | -8.42E-05 | 2.39E-05 |
A seventh embodiment of the imaging lens of the present invention will now be described in detail. The lens configuration of the imaging lens 7 (not shown) of the seventh embodiment is similar to that of the first embodiment, and therefore the illustration thereof is omitted, and the difference is that the fourth lens and the fifth lens of the imaging lens are glued, but in the following description, the reference numerals of the seventh embodiment will be used for convenience of description. The imaging lens includes a first lens L71, a second lens L72, a third lens L73, an aperture stop ST7, a fourth lens L74, a fifth lens L75, a sixth lens L76, an optical filter OF7, and a cover glass CG7. The first lens L71, the second lens L72, the third lens L73, the aperture stop ST7, the fourth lens L74, the fifth lens L75, the sixth lens L76, the filter OF7, and the cover glass CG7 are arranged in order from the object side to the image side along the optical axis OA 7. In imaging, light from the object side is finally imaged on the imaging plane IMA 7. According to the first to eighth paragraphs [ detailed description ], wherein: the second lens L72 is a biconcave lens having a negative refractive power, and an image-side surface S74 thereof is a concave surface; the third lens L73 is a biconvex lens having positive refractive power, and the object side surface S75 thereof is a convex surface; the fourth lens L74 is a biconvex lens having a positive refractive power, and the object-side surface S78 thereof is a convex surface; the fifth lens element L75 has a negative refractive power, wherein an object-side surface S79 thereof is concave, and an image-side surface S710 thereof is convex; the fourth lens L74 and the fifth lens L75 are glued or there is no air space between them, and the glued lens of the fourth lens L74 and the fifth lens L75 combination has positive refractive power; the sixth lens element L76 with aspheric object-side surface S711 and image-side surface S712; the optical filter OF7 has object side surfaces S713 and S714 and the cover glass CG7 has object side surfaces S715 and S716 both OF which are planar; by utilizing the lens, the aperture ST7 and the design meeting at least one of the conditions (1) to (12), the imaging lens can effectively reduce the total length of the lens, effectively improve the resolution and effectively correct the aberration. Table eighteen is a table of relevant parameters for each lens of the imaging lens.
Watch eighteen
The definition of the aspherical surface dishing z of the aspherical lens in table eighteen is the same as that of the aspherical lens in the first embodiment, and is not described here.
Table nineteenth is a table of related parameters of the aspherical surface of the aspherical lens in table eighteen.
Nineteen table
| Surface serial number | k | A | B | C | D | E | F |
| S711 | 0 | -1.32E-02 | 1.06E-03 | -1.12E-03 | 8.39E-04 | -5.53E-04 | 1.08E-04 |
| S712 | 0 | -2.36E-03 | 6.92E-04 | -7.20E-05 | -4.66E-05 | -8.42E-05 | 2.39E-05 |
While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is defined by the appended claims.
Claims (10)
1. An imaging lens, comprising:
the first lens has negative refractive power, is a meniscus lens and comprises a convex surface facing the object side and a concave surface facing the image side;
the second lens has refractive power and comprises a concave surface facing the object side;
the third lens has refractive power, and the third lens comprises a convex surface facing the image side;
the fourth lens has refractive power, and the fourth lens comprises a convex surface facing the image side;
the fifth lens has refractive power; and
the sixth lens has positive refractive power, is a biconvex lens, and comprises a convex surface facing the object side and another convex surface facing the image side;
the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element are arranged in order from the object side to the image side along an optical axis;
wherein the imaging lens satisfies at least one of the following conditions:
HFOV/fLL is less than or equal to 12 degrees/mm and less than or equal to 17 degrees/mm;
-35 DEG/mm < HFOV/f1 < 23 DEG/mm;
0.16≤BFL/TTL≤0.19；
-7mm<f+f4<4mm；
5mm 2 <∣f1×f5∣<12mm 2 ；
2mm<∣R21×R22/f2∣<10mm；
wherein fLL is the effective focal length of the lens closest to the image side, TTL is the distance from the object side surface of the first lens element to the image plane along the optical axis, HFOV is the half field of view of the imaging lens, BFL is the distance from the image side surface of the lens closest to the image side to the image plane along the optical axis, f is the effective focal length of the imaging lens element, f1 is the effective focal length of the first lens element, f2 is the effective focal length of the second lens element, f4 is the effective focal length of the fourth lens element, f5 is the effective focal length of the fifth lens element, R21 is the radius of curvature of the object side surface of the second lens element, and R22 is the radius of curvature of the image side surface of the second lens element.
2. The imaging lens as claimed in claim 1, wherein:
the second lens is a biconcave lens with negative refractive power and further comprises another concave surface facing the image side;
the third lens is a biconvex lens and has positive refractive power, and the other convex surface faces the object side;
the fourth lens is a biconvex lens with refractive power and further comprises another convex surface facing the object side; and
the fifth lens is a meniscus lens with refractive power and comprises a concave surface facing the object side and a convex surface facing the image side.
3. The imaging lens as claimed in claim 1, further comprising a seventh lens disposed between the sixth lens and the image side, wherein the seventh lens is a biconvex lens having positive refractive power and comprising a convex surface facing the object side and another convex surface facing the image side.
4. The imaging lens as recited in claim 3, wherein,
the second lens is a biconcave lens with negative refractive power and further comprises another concave surface facing the image side;
the third lens is a biconvex lens and has positive refractive power, and the other convex surface faces the object side;
the fourth lens is a biconvex lens and further comprises another convex surface facing the object side; and
the fifth lens is a meniscus lens and comprises a concave surface facing the object side and a convex surface facing the image side.
5. The imaging lens as recited in claim 3, wherein,
the second lens is a meniscus lens with positive refractive power and further comprises a convex surface facing the image side;
the third lens is a meniscus lens with negative refractive power and further comprises a concave surface facing the object side;
the fourth lens is a biconvex lens and further comprises another convex surface facing the object side; and
the fifth lens is a biconcave lens and comprises a concave surface facing the object side and another concave surface facing the image side.
6. The imaging lens as claimed in claim 3, further comprising an eighth lens element disposed between the fifth lens element and the sixth lens element, wherein the eighth lens element is a meniscus lens element having a refractive power and comprising a concave surface facing the object side and a convex surface facing the image side.
7. The imaging lens as claimed in claim 6, wherein:
the second lens is a biconcave lens and further comprises another concave surface facing the image side;
the third lens is a biconvex lens and further comprises another convex surface facing the object side;
the fourth lens is a meniscus lens with negative refractive power and further comprises a concave surface facing the object side; and
the fifth lens is a biconvex lens and comprises a convex surface facing the object side and another convex surface facing the image side.
8. The imaging lens as claimed in claim 7, wherein:
the second lens and the third lens do not include an air space therebetween, and the combination of the second lens and the third lens has positive refractive power; and
the fifth lens and the eighth lens do not include an air space therebetween, and a combination of the fifth lens and the eighth lens has positive refractive power.
9. The imaging lens as claimed in any one of claims 1 to 5, wherein when an air space is included between the fourth lens and the fifth lens, the fourth lens has positive refractive power, and the fifth lens has negative refractive power; when the fourth lens and the fifth lens do not include an air gap therebetween, the combination of the fourth lens and the fifth lens has positive refractive power.
10. The imaging lens as claimed in any one of claims 1 to 8, further comprising an aperture stop disposed between the third lens element and the fifth lens element, wherein the imaging lens element satisfies at least one of the following conditions:
-22≤fF/f≤-2；
6.4≤TTL/T4≤11.4；
0.5<BFL/T3<1.7；
0.25<f/fR<0.38；
85≤Vd1+Vd4≤103；
87mm 2 ≤fLL×TTL≤111mm 2 ；
wherein TTL is the distance from the object side surface of the first lens element to the image plane along the optical axis, BFL is the distance from the image side surface of the lens element closest to the image side to the image plane along the optical axis, T3 is the distance from the object side surface of the third lens element to the image side surface of the third lens element along the optical axis, T4 is the distance from the object side surface of the fourth lens element to the image side surface of the fourth lens element along the optical axis, fF is the combined effective focal length of the lens element between the object side and the aperture, fR is the combined effective focal length of the lens element between the aperture and the image side, vd1 is the abbe number of the first lens element, vd4 is the abbe number of the fourth lens element, and fLL is the effective focal length of the lens element closest to the image side.
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| TW110148927A TWI808581B (en) | 2021-12-27 | 2021-12-27 | Lens assembly |
| TW110148927 | 2021-12-27 |
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|---|---|
| CN116360075A true CN116360075A (en) | 2023-06-30 |
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| JP5830104B2 (en) * | 2011-09-29 | 2015-12-09 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
| CN108983396A (en) * | 2018-09-04 | 2018-12-11 | 江西凤凰光学科技有限公司 | A kind of fish eye lens |
| US11314043B2 (en) * | 2018-09-10 | 2022-04-26 | Sintai Optical (Shenzhen) Co., Ltd. | Lens assembly including six lenses of −−++−+ refractive powers |
| TWI687736B (en) * | 2019-04-12 | 2020-03-11 | 大陸商信泰光學（深圳）有限公司 | Wide-angle lens assembly |
| CN112305718A (en) * | 2020-11-27 | 2021-02-02 | 东莞市宇瞳光学科技股份有限公司 | Fixed focus lens |
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