CN111505807A - High-definition camera and foldback type zoom optical lens - Google Patents

High-definition camera and foldback type zoom optical lens Download PDF

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Publication number
CN111505807A
CN111505807A CN202010611407.3A CN202010611407A CN111505807A CN 111505807 A CN111505807 A CN 111505807A CN 202010611407 A CN202010611407 A CN 202010611407A CN 111505807 A CN111505807 A CN 111505807A
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lens
lens group
power
zoom
focal power
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CN111505807B (en
Inventor
厉冰川
菊地修一
诸益炜
张平华
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Jiaxing Zhongrun Optical Technology Co Ltd
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Jiaxing Zhongrun Optical Technology Co Ltd
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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
    • G02B13/0065—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
    • 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
    • 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
    • G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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Abstract

The invention discloses a high-definition camera and a turn-back type zoom optical lens, and relates to the technical field of camera shooting. The invention comprises the following steps: a fold-back zoom optical lens; and an image pickup element configured to receive an image formed by the fold-back zoom optical lens; the folding zoom optical lens sequentially comprises from an object side to an image side: the imaging lens comprises an anti-shake lens group with negative focal power, a turning prism, a fixed lens group with negative focal power, a focusing lens group with positive focal power, a zoom lens group with positive focal power and an imaging surface with an imaging element; an aperture diaphragm is arranged on the object side surface of the first lens from the object side to the image side of the focusing lens group. The invention can compress the volume of the lens through the turning light path, the zoom ratio reaches more than 3X, and the invention has the optical anti-shake function and the anti-shake angle reaches more than 3 degrees on the premise of meeting the 4K high-definition performance.

Description

High-definition camera and foldback type zoom optical lens
Technical Field
The invention relates to the technology of the field of camera shooting, in particular to a high-definition camera and a turn-back type zoom optical lens.
Background
A high-definition camera, i.e. a digital camera capable of taking high-quality and high-definition images, wherein the shot images can reach 720 lines of progressive scanning mode, 1280 × 720 resolution, or 1080 lines of interlaced scanning mode, 1920 × 1080 resolution.
High definition camera also can obtain higher definition in order to make when shooting distant place object, needs to use the ability of zooming, and the mode of zooming of the camera lens in current high definition camera mainly includes: the multi-lens splicing zooming and the switching zooming are carried out, wherein the focal length change of the multi-lens splicing zooming is step, the more the number of the lenses is, the smoother the zooming process is, and the larger the size of the high-definition camera is; the optical axes of different lenses are not overlapped, the center of a picture has a 'jumping' sense during switching, and in order to reduce the phenomenon, software on a high-definition camera must cut the picture, so that the loss of a view field and pixels is caused; the splicing process among the multiple modules is complex, the precision requirement is high, and the production and manufacturing process is very difficult.
The switching type zooming can directly set a zooming group in the high-definition camera, and the direct carrying means that an optical structure meets the performance requirement of the high-definition camera, and an additional optical zooming group is required to be set, so that the space in the high-definition camera is crowded, the zooming ratio is low, and the volume of the high-definition camera is further increased; the magnifying lens as an independent optical system can introduce extra aberration, so that the optical performance of the high-definition camera is reduced; the later installation mode can not be used as a resident zooming means, which causes inconvenience in use.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a high-definition camera and a turn-back type zoom optical lens, which can achieve a larger zoom ratio under an extremely small volume, have a 4K high-definition resolving power level and carry an optical anti-shake calibration scheme.
The invention is realized by the following technical scheme:
the invention aims to provide a high-definition camera, which comprises: a fold-back zoom optical lens;
and an image pickup element configured to receive an image formed by the fold-back zoom optical lens;
the folding zoom optical lens sequentially comprises from an object side to an image side: the zoom lens group comprises an anti-shake lens group with negative focal power, a turning prism, a fixed lens group with negative focal power, a focusing lens group with positive focal power and a zoom lens group with positive focal power;
an aperture diaphragm is arranged on the object side surface of the first lens from the object side to the image side of the focusing lens group;
the turning prism includes: an incident surface, a reflecting surface and an emergent surface;
the fold-back type zoom optical lens meets the following requirements:
Figure 378826DEST_PATH_IMAGE001
wherein: f. ofwideIs the focal length of the folding type zoom optical lens at the wide-angle end fteleThe focal length of the folding type zoom optical lens at the telephoto end is TT L, and the optical total length of the folding type zoom optical lens is TT L;
the anti-shake lens group includes: at least one lens with negative focal power;
the fixed lens group includes: at least one lens with negative focal power;
the focusing lens group comprises the following components in sequence from an object side to an image side: at least one lens with positive focal power and one lens with negative focal power;
the zoom lens group includes: a lens having a positive power, and a cemented lens composed of a lens having a positive power and a lens having a negative power.
Preferably, a lens having positive refractive power is additionally arranged in the direction close to the image side in the fixed lens group.
Preferably, the anti-shake lens group satisfies:
Figure 561546DEST_PATH_IMAGE002
and
Figure 606862DEST_PATH_IMAGE003
wherein: f. ofS1Is the focal length of the entire anti-shake lens group, and S is the offset of the anti-shake lens group G1 perpendicular to the optical axisG1R1Is an anti-shake lens groupEffective aperture R of front surface of first lens from object side to image sideG1R2The radius of curvature of the rear surface of the first lens of the anti-shake lens group.
Preferably, when no lens with positive power exists in the fixed lens group, the fixed lens group satisfies:
Figure 283962DEST_PATH_IMAGE004
wherein: f. ofS2To fix the focal length of the lens group as a wholeS2RTo fix the effective aperture of the last optical surface of the lens group.
Preferably, the fixed lens group satisfies:
Figure 363914DEST_PATH_IMAGE005
and
Figure 451956DEST_PATH_IMAGE006
wherein: f. ofS1G1Is the focal length of a lens having a negative power, fS1G2Is the focal length of a lens having positive optical power, fS2To fix the focal length of the lens group as a wholeS2RTo fix the effective aperture of the last optical surface of the lens group.
Preferably, the focusing lens group satisfies:
Figure 984568DEST_PATH_IMAGE007
and
Figure 449048DEST_PATH_IMAGE008
wherein: f. ofS3G1The focal length of the first lens with positive focal power from the object side to the image side of the focusing lens group is phiS3FThe effective aperture of the first optical surface from the object side to the image side of the focusing lens group, NdS3RIs the refractive index of the lens with negative focal power in the focusing lens group.
Preferably, the zoom lens group satisfies:
Figure 383506DEST_PATH_IMAGE009
and
Figure 642449DEST_PATH_IMAGE010
wherein: f. ofS4Is the focal length of the entire zoom lens group, fS4G1Is the focal length, Vd, of the first lens with positive focal power from the object side to the image side of the zoom lens groupS4FThe Abbe number of the first lens with positive focal power in the zoom lens group.
Preferably, the surfaces of the incident surface and the exit surface are plated with antireflection films to reduce light loss; the surface of the reflecting surface is plated with a total reflection film to ensure that the optical path is deflected with specific focal power.
Another object of the present invention is to provide a folding zoom optical lens, comprising, in order from an object side to an image side: the zoom lens group comprises an anti-shake lens group with negative focal power, a turning prism, a fixed lens group with negative focal power, a focusing lens group with positive focal power and a zoom lens group with positive focal power;
an aperture diaphragm is arranged on the object side surface of the first lens from the object side to the image side of the focusing lens group;
the turning prism includes: an incident surface, a reflecting surface and an emergent surface;
the fold-back type zoom optical lens meets the following requirements:
Figure 662357DEST_PATH_IMAGE001
wherein: f. ofwideIs the focal length of the folding type zoom optical lens at the wide-angle end fteleThe focal length of the folding type zoom optical lens at the telephoto end is TT L, and the optical total length of the folding type zoom optical lens is TT L;
the anti-shake lens group includes: at least one lens with negative focal power;
the fixed lens group includes: at least one lens with negative focal power;
the focusing lens group comprises the following components in sequence from an object side to an image side: at least one lens with positive focal power and one lens with negative focal power;
the zoom lens group includes: a lens having a positive power, and a cemented lens composed of a lens having a positive power and a lens having a negative power.
Compared with the prior art, the zoom ratio can be more than 3X by compressing the volume of the lens through the turning light path, and the optical anti-shake lens has an optical anti-shake function and an anti-shake angle of more than 3 degrees on the premise of meeting the 4K high-definition performance.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic view showing zooming from the wide-angle end to the telephoto end in example 1;
FIG. 3 is a diagram showing aberrations of the telephoto end with respect to the d-line in example 1;
fig. 4 is each aberration diagram of the wide-angle end with respect to the d-line of example 1;
FIG. 5 is a schematic structural view of example 2;
FIG. 6 is a schematic view showing magnification variation from the wide-angle end to the telephoto end in example 2;
FIG. 7 is each aberration diagram of the telephoto end with respect to the d-line of example 2;
fig. 8 is each aberration diagram of example 2 at the wide-angle end with respect to the d-line;
FIG. 9 is a schematic structural view of example 3;
FIG. 10 is a schematic view showing magnification varying from the wide-angle end to the telephoto end in example 3;
FIG. 11 is each aberration diagram of the telephoto end with respect to the d-line in example 3;
fig. 12 is each aberration diagram of example 3 at the wide-angle end with respect to the d-line;
the reference numerals illustrate an anti-shake lens group G1, a turning prism P, a fixed lens group G2, a diaphragm STP, a focus lens group G3, a zoom lens group G4, a cover glass CG, an image plane IMG, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8.
Detailed Description
Example 1: as shown in fig. 1, a high definition camera includes:
a fold-back zoom optical lens;
and an image pickup element configured to receive an image formed by the fold-back zoom optical lens; the image pickup element is a CCD or a CMOS, and the image pickup element can be arranged on the image side surface IMG of the folding type zoom optical lens.
The folding zoom optical lens includes, in order from an object side to an image side: an anti-shake lens group G1 having negative power, a turning prism P, a fixed lens group G2 having negative power, a focus lens group G3 having positive power, and a zoom lens group G4 having positive power; in this embodiment, the surfaces of the lens groups and the lenses therein near the object side are front surfaces, and the surfaces near the image side are rear surfaces.
The anti-shake lens group G1 is a first lens L1 having negative refractive power, and the front surface of the lens is convex and the rear surface is concave.
The surfaces of the incident surface and the emergent surface of the turning prism P are plated with antireflection films so as to reduce the light loss caused by absorption and reflection in the process of penetrating the prism, and the surface of the reflecting surface is plated with a total reflection film so as to ensure that the light path is deflected at a specific angle; specifically, the angle between the incident surface and the exit surface is set to 90 degrees.
The fixed lens group G2 comprises a second lens L2 with negative focal power and a third lens L3 with positive focal power, wherein the front and back surfaces of the second lens L2 are concave, and the front surface of the third lens L3 is convex and the back surface of the third lens L is concave.
The focusing lens group G3 comprises a fourth lens L4 with positive focal power and a fifth lens L5 with negative focal power, wherein the front and back surfaces of the fourth lens L4 are convex and aspheric, and the front surface of the fifth lens L5 is convex and the back surface of the fifth lens L is concave.
The front surface of the fourth lens L4 is provided with an aperture stop STP.
The zoom lens group G4 comprises a sixth lens L6 with positive focal power, a cemented lens consisting of a seventh lens L7 with positive focal power and an eighth lens L8 with negative focal power, wherein the front and back surfaces of the sixth lens L6 are convex, the front and back surfaces of the seventh lens L7 are convex, and the front surface of the eighth lens L8 is concave and convex.
And an optical filter IRCF and protective glass CG which are used for filtering light rays in unnecessary wave bands and stray light are arranged on the object side of the imaging surface IMG.
As shown in fig. 2, the zoom lens group G4 is moved from the image side to the object side along the optical axis, and realizes magnification variation from the wide-angle end to the telephoto end; the focusing lens group G3 is moved along the optical axis to correct the virtual focus caused by the magnification change process and the object distance change.
The anti-shake lens group G1 moves in a direction perpendicular to the optical axis, and can correct optical axis deviation and image quality loss due to shake.
Table 1 basic optical parameters of the lens of example 1
Figure 678330DEST_PATH_IMAGE011
In the table: f is the focal length of the lens; fno is the numerical aperture; y is the focal length in the effective image circle diameter of the camera.
Table 2 example 1 lens construction parameters
Figure 467295DEST_PATH_IMAGE012
Wherein the seventh lens L7 is cemented with the eighth lens L8, so the rear surface of the seventh lens L7 is the front surface of the eighth lens L8.
Table 3 zoom parameters of example 1
Figure 162718DEST_PATH_IMAGE013
Table 4 aspherical surface coefficients of example 1
Figure 669923DEST_PATH_IMAGE014
Lens satisfaction of the embodiment
Figure 210626DEST_PATH_IMAGE015
Wherein: f. ofwideFocal length of the lens at wide angle end, fteleTT L is the total optical length of the lens, which is the focal length of the lens at the telephoto end.
The anti-shake lens group G1 of the present embodiment satisfies
Figure 119676DEST_PATH_IMAGE016
Wherein: f. ofS1F is the focal length of the entire anti-shake lens group G1teleS is an offset of the anti-shake lens group G1 perpendicular to the optical axis direction, specifically, S =1.5mm in the present embodiment; and also satisfy
Figure 736733DEST_PATH_IMAGE017
Wherein: phi is aG1R1The effective aperture R of the first lens L1 near the object side surfaceG1R2In this embodiment, the refractive optical path in the first lens L1 is effectively controlled by the limitation of the effective aperture and the curvature radius of the first lens L1, which is the curvature radius of the image-side surface of the first lens L1, so that the imaging quality on the imaging element is improved.
The fixed lens group G2 of the present embodiment satisfies
Figure 731234DEST_PATH_IMAGE018
Wherein: f. ofS1G1Is the focal length, f, of the second lens L2S1G2Is the focal length of the third lens L3
Figure 75628DEST_PATH_IMAGE019
Wherein: f. ofS2To fix the focal length of the lens group G2 as a wholeS2RThe effective aperture of the rear surface of the third lens L3 is defined by the focal lengths of the second lens L2 and the third lens L3, the direction of the light path in the lens is adjusted, and further, the chromatic aberration and astigmatism of the image are increased, and the imaging quality is improved.
The focusing lens group G3 of the present embodiment satisfies
Figure 839184DEST_PATH_IMAGE020
Wherein: f. ofS3G1Is the focal length, phi, of the fourth lens L4S3FIs the effective aperture of the front surface of the fourth lens L4, and satisfies
Figure 141990DEST_PATH_IMAGE021
Wherein: nd (neodymium)S3RIs the refractive index of the fifth lens L5.
The zoom lens group G4 of the present embodiment satisfies
Figure 358207DEST_PATH_IMAGE022
Wherein: f. ofS4F is the focal length of the entire zoom lens group G4S4G1Is the focal length of the sixth lens L6
Figure 522604DEST_PATH_IMAGE023
Wherein: vdS4FThe abbe number of the sixth lens L6.
As shown in fig. 3, the spherical aberration, curvature of field, and distortion values of the lens at the Wide end are shown from left to right.
As shown in fig. 4, the spherical aberration, curvature of field, and distortion values of the lens at the Tele end are shown from left to right.
Example 2 as shown in fig. 5 and 6, the fixed lens group G2 of the present example has only one second lens L2 having negative refractive power, which is concave and aspherical on both the front and rear surfaces, as compared with example 1.
Table 5 basic optical parameters of the lens of example 2
Figure 140667DEST_PATH_IMAGE024
In the table: f is the focal length; fno is the numerical aperture; y is the focal length in the effective image circle diameter of the camera.
Table 6 example 2 lens construction parameters
Figure 614373DEST_PATH_IMAGE025
Wherein the seventh lens L7 is cemented with the eighth lens L8, so the rear surface of the seventh lens L7 is the front surface of the eighth lens L8.
Table 7 zoom parameters of example 2
Figure 317887DEST_PATH_IMAGE026
Table 8 aspherical surface coefficients of example 2
Figure 4083DEST_PATH_IMAGE027
Lens satisfaction of the embodiment
Figure 742232DEST_PATH_IMAGE028
Wherein: f. ofwideFocal length of the lens at wide angle end, fteleTT L is the total optical length of the lens, which is the focal length of the lens at the telephoto end.
The anti-shake lens group G1 of the present embodiment satisfies
Figure 121261DEST_PATH_IMAGE029
Wherein: f. ofS1F is the focal length of the entire anti-shake lens group G1teleS is an offset of the anti-shake lens group G1 perpendicular to the optical axis direction, specifically, S =1.3mm in the present embodiment; and also satisfy
Figure 62803DEST_PATH_IMAGE030
Wherein: phi is aG1R1Is the effective aperture, R, of the front surface of the first lens L1G1R2Is the radius of curvature of the rear surface of the first lens L1.
The fixed lens group G2 of the present embodiment satisfies
Figure 818270DEST_PATH_IMAGE031
Wherein: f. ofS2To fix the focal length of the lens group G2 as a wholeS2RIs the effective aperture of the rear surface of the second lens L2.
The focusing lens group G3 of the present embodiment satisfies
Figure 145346DEST_PATH_IMAGE032
Wherein: f. ofS3G1Is the focal length, phi, of the fourth lens L4S3FIs the effective aperture of the front surface of the fourth lens L4, and satisfies
Figure 695276DEST_PATH_IMAGE033
Wherein: nd (neodymium)S3RIs the refractive index of the fifth lens L5.
The zoom lens group G4 of the present embodiment satisfies
Figure 373382DEST_PATH_IMAGE034
Wherein: f. ofS4F is the focal length of the entire zoom lens group G4S4G1Is the focal length of the sixth lens L6
Figure 666960DEST_PATH_IMAGE023
Wherein: vdS4FThe abbe number of the sixth lens L6.
As shown in fig. 7, the spherical aberration, curvature of field, and distortion values of the lens at the Wide end are shown from left to right.
As shown in fig. 8, the spherical aberration, curvature of field, and distortion values of the lens at the Tele end are shown from left to right.
Example 3 As shown in FIGS. 9 and 10, the front and rear surfaces of the sixth lens L6 of this example are aspherical as compared to example 1.
Table 9 basic optical parameters of the lens of example 3
Figure 114122DEST_PATH_IMAGE035
In the table: f is the focal length; fno is the numerical aperture; y is the focal length in the effective image circle diameter of the camera.
Table 10 example 3 lens construction parameters
Figure 334755DEST_PATH_IMAGE036
Wherein the seventh lens L7 is cemented with the eighth lens L8, so the rear surface of the seventh lens L7 is the front surface of the eighth lens L8.
Table 11 zoom parameters of example 3
Figure 765736DEST_PATH_IMAGE037
Table 12 aspherical surface coefficients of example 3
Figure 597426DEST_PATH_IMAGE038
Lens satisfaction of the embodiment
Figure 164674DEST_PATH_IMAGE039
Wherein: f. ofwideFocal length of the lens at wide angle end, fteleTT L is the total optical length of the lens, which is the focal length of the lens at the telephoto end.
The anti-shake lens group G1 of the present embodiment satisfies
Figure 790827DEST_PATH_IMAGE040
Wherein: f. ofS1F is the focal length of the entire anti-shake lens group G1teleS is an offset of the anti-shake lens group G1 perpendicular to the optical axis direction, specifically, S =1.6mm in the present embodiment; and also satisfy
Figure 443525DEST_PATH_IMAGE041
Wherein: phi is aG1R1Is the effective aperture, R, of the front surface of the first lens L1G1R2Is the radius of curvature of the rear surface of the first lens L1.
The fixed lens group G2 of the present embodiment satisfies
Figure 78906DEST_PATH_IMAGE042
Wherein: f. ofS1G1Is the focal length, f, of the second lens L2S1G2Is the focal length of the third lens L3
Figure 251392DEST_PATH_IMAGE043
Wherein: f. ofS2To fix the focal length of the lens group G2 as a wholeS2RIs the effective aperture of the rear surface of the third lens L3.
The focusing lens group G3 of the present embodiment satisfies
Figure 314026DEST_PATH_IMAGE044
Wherein: f. ofS3G1Is the focal length, phi, of the fourth lens L4S3FIs the effective aperture of the front surface of the fourth lens L4, and satisfies
Figure 454021DEST_PATH_IMAGE045
Wherein: nd (neodymium)S3RIs the refractive index of the fifth lens L5.
The zoom lens group G4 of the present embodiment satisfies
Figure 893092DEST_PATH_IMAGE046
Wherein: f. ofS4F is the focal length of the entire zoom lens group G4S4G1Is the focal length of the sixth lens L6
Figure 169353DEST_PATH_IMAGE023
Wherein: vdS4FThe abbe number of the sixth lens L6.
As shown in fig. 11, the spherical aberration, curvature of field, and distortion values of the lens at the Wide end are shown from left to right.
As shown in fig. 12, the spherical aberration, curvature of field, and distortion values of the lens at the Tele end are shown from left to right.
Through specific practical experiments, after a lens of the high-definition camera is carried with a sensor, optical zooming/focusing is carried out under a visible light environment, a corresponding image is obtained, the zoom ratio reaches more than 3X, and the whole-process 4K performance and optical anti-shake are realized. Compared with the prior art, the high-definition camera compresses the volume of the lens through the turning type light path structure, the turning size of the lens is smaller than 15mm under the same zoom ratio, each multiplying power has an optical anti-shake function under the premise of meeting 4K high-definition performance, and the anti-shake angle reaches more than 3 degrees.
Example 4: as shown in fig. 1 to 9, a folding zoom optical lens includes, in order from an object side to an image side: an anti-shake lens group G1 having negative power, a turning prism P, a fixed lens group G2 having negative power, a focus lens group G3 having positive power, and a zoom lens group G4 having positive power. In this embodiment, the surfaces of the lens groups and the lenses therein near the object side are front surfaces, and the surfaces near the image side are rear surfaces.
An aperture stop STP is provided on an object side surface of the first lens from the object side to the image side of the focusing lens group G3.
The turning prism P includes: incident surface, reflecting surface and emergent surface.
The fold-back type zoom optical lens meets the following requirements:
Figure 419200DEST_PATH_IMAGE001
wherein: f. ofwideIs the focal length of the folding type zoom optical lens at the wide-angle end fteleThe focal length of the folding type zoom optical lens at the telephoto end is TT L, and the optical total length of the folding type zoom optical lens is TT L;
the anti-shake lens group includes: at least one lens with negative focal power;
the fixed lens group includes: at least one lens with negative focal power;
the focusing lens group G3 includes, in order from the object side to the image side: at least one lens with positive focal power and one lens with negative focal power;
the zoom lens group G4 includes: a lens having a positive power, and a cemented lens composed of a lens having a positive power and a lens having a negative power.
The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (9)

1. A high definition camera, comprising:
a fold-back zoom optical lens;
and an image pickup element configured to receive an image formed by the fold-back zoom optical lens;
the folding zoom optical lens sequentially comprises from an object side to an image side: the zoom lens group comprises an anti-shake lens group with negative focal power, a turning prism, a fixed lens group with negative focal power, a focusing lens group with positive focal power and a zoom lens group with positive focal power;
an aperture diaphragm is arranged on the object side surface of the first lens from the object side to the image side of the focusing lens group;
the turning prism includes: an incident surface, a reflecting surface and an emergent surface;
the fold-back type zoom optical lens meets the following requirements: (f)tele-fwide)/TTL<0.27, wherein: f. ofwideIs the focal length of the folding type zoom optical lens at the wide-angle end fteleThe focal length of the folding type zoom optical lens at the telephoto end is TT L, and the optical total length of the folding type zoom optical lens is TT L;
the anti-shake lens group includes: at least one lens with negative focal power;
the fixed lens group includes: at least one lens with negative focal power;
the focusing lens group comprises the following components in sequence from an object side to an image side: at least one lens with positive focal power and one lens with negative focal power;
the zoom lens group includes: a lens having a positive power, and a cemented lens composed of a lens having a positive power and a lens having a negative power.
2. The high definition video camera as claimed in claim 1, wherein a lens having a positive refractive power is added to the fixed lens group in a direction close to the image side.
3. The high definition camera of claim 1, wherein the anti-shake lens group satisfies: 3000<fS1/(tan( S/ftele))<3500 and 1.78<φG1R1/RG1R2<2, wherein: f. ofS1Is the focal length of the entire anti-shake lens group, and S is the offset of the anti-shake lens group G1 perpendicular to the optical axisG1R1The effective aperture R of the front surface of the first lens from the object side to the image side of the anti-shake lens groupG1R2The radius of curvature of the rear surface of the first lens of the anti-shake lens group.
4. The high definition camera of claim 1, wherein when no lens with positive power exists in the fixed lens group, the fixed lens group satisfies: -7.25<fS2/φS2R<-5.64, wherein: f. ofS2To fix the focal length of the lens group as a wholeS2RTo fix the effective aperture of the last optical surface of the lens group.
5. The high definition camera of claim 2, wherein the fixed lens group satisfies: -0.61<fS1G1/fS1G2<-0.46 and-7.25<fS2/φS2R<-5.64, wherein: f. ofS1G1Is the focal length of a lens having a negative power, fS1G2Is the focal length of a lens having positive optical power, fS2To fix the focal length of the lens group as a wholeS2RTo fix the effective aperture of the last optical surface of the lens group.
6. The high definition camera of claim 1, wherein the focusing lens group satisfies: 0.88<fS3G1/φS3F<1.24 and 1.55<NdS3R<1.95, wherein: f. ofS3G1The focal length of the first lens with positive focal power from the object side to the image side of the focusing lens group is phiS3FThe effective aperture of the first optical surface from the object side to the image side of the focusing lens group, NdS3RIs the refractive index of the lens with negative focal power in the focusing lens group.
7. The high definition camera of claim 1, wherein the zoom lens group satisfies: 1.03<fS4/fS4G1<1.35 and VdS4F>55, wherein: f. ofS4Is the focal length of the entire zoom lens group, fS4G1Is the focal length, Vd, of the first lens with positive focal power from the object side to the image side of the zoom lens groupS4FThe Abbe number of the first lens with positive focal power in the zoom lens group.
8. The high-definition camera according to claim 1, wherein the surfaces of the incident surface and the exit surface are coated with antireflection films to reduce optical loss; the surface of the reflecting surface is plated with a total reflection film to ensure that the optical path is deflected with specific focal power.
9. A folding zoom optical lens, comprising, in order from an object side to an image side: the zoom lens group comprises an anti-shake lens group with negative focal power, a turning prism, a fixed lens group with negative focal power, a focusing lens group with positive focal power and a zoom lens group with positive focal power;
an aperture diaphragm is arranged on the object side surface of the first lens from the object side to the image side of the focusing lens group;
the turning prism includes: an incident surface, a reflecting surface and an emergent surface;
the fold-back type zoom optical lens meets the following requirements: (f)tele-fwide)/TTL<0.27, wherein: f. ofwideIs the focal length of the folding type zoom optical lens at the wide-angle end fteleThe focal length of the folding type zoom optical lens at the telephoto end is TT L, and the optical total length of the folding type zoom optical lens is TT L;
the anti-shake lens group includes: at least one lens with negative focal power;
the fixed lens group includes: at least one lens with negative focal power;
the focusing lens group comprises the following components in sequence from an object side to an image side: at least one lens with positive focal power and one lens with negative focal power;
the zoom lens group includes: a lens having a positive power, and a cemented lens composed of a lens having a positive power and a lens having a negative power.
CN202010611407.3A 2020-06-30 2020-06-30 High-definition camera and foldback type zoom optical lens Active CN111505807B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101042463A (en) * 2006-03-23 2007-09-26 富士能株式会社 Zoom lens
JP2011013281A (en) * 2009-06-30 2011-01-20 Canon Inc Zoom lens and imaging apparatus having the same
JP2011137903A (en) * 2009-12-28 2011-07-14 Canon Inc Zoom lens and imaging apparatus having the same
CN102338928A (en) * 2010-07-20 2012-02-01 佳能株式会社 Zoom lens system and image pickup apparatus including the same
US20120026603A1 (en) * 2010-07-29 2012-02-02 Young Optics Inc. Zoom lens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101042463A (en) * 2006-03-23 2007-09-26 富士能株式会社 Zoom lens
JP2011013281A (en) * 2009-06-30 2011-01-20 Canon Inc Zoom lens and imaging apparatus having the same
JP2011137903A (en) * 2009-12-28 2011-07-14 Canon Inc Zoom lens and imaging apparatus having the same
CN102338928A (en) * 2010-07-20 2012-02-01 佳能株式会社 Zoom lens system and image pickup apparatus including the same
US20120026603A1 (en) * 2010-07-29 2012-02-02 Young Optics Inc. Zoom lens

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