CN111538153B - High definition camera device and deformation doubling mirror - Google Patents
High definition camera device and deformation doubling mirror Download PDFInfo
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- CN111538153B CN111538153B CN202010666434.0A CN202010666434A CN111538153B CN 111538153 B CN111538153 B CN 111538153B CN 202010666434 A CN202010666434 A CN 202010666434A CN 111538153 B CN111538153 B CN 111538153B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/06—Simple or compound lenses with non-spherical faces with cylindrical or toric faces
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Abstract
The invention discloses a high-definition camera device and a deformable doubling mirror, and relates to the technical field of camera shooting. The method comprises the following steps: an optical lens; and an image pickup element configured to receive an image formed by the optical lens; the optical lens and the image pickup element are also provided with a deformation multiplying lens; the deformation doubling mirror comprises the following components in sequence from the object plane side to the image plane side: a first adjusting lens group with negative focal power, a cylindrical lens group and a second adjusting lens group with positive focal power; the deformation doubling mirror meets the following conditional expression: EFL1/EFL2 < 0; the EFL1 is the focal length of the anamorphic multiplying mirror along a first preset direction, and the EFL2 is the focal length of the anamorphic multiplying mirror along a second preset direction; the first preset direction and the second preset direction are both perpendicular to the optical axis direction of the distortion multiplying mirror. The distance of the image obtained by the image surface in one direction is increased, and the distance of the image obtained by the image surface in the other direction is decreased, so that the image with a wide frame width can be formed.
Description
Technical Field
The invention relates to the technical field of camera shooting, in particular to a high-definition camera shooting device and a deformable doubling mirror.
Background
The camera, waterproof digital camera, camera are various, and its fundamental principle of work all is the same: the optical image signal is converted into an electrical signal for storage or transmission. When an object is shot, light reflected by the object is collected by a camera lens, so that the light is focused on a light receiving surface of an image pickup device (such as a target surface of an image pickup tube), and the light is converted into electric energy through the image pickup device, so that a video signal is obtained. The photoelectric signal is weak, and needs to be amplified through a pre-discharge circuit, and then processed and adjusted through various circuits, and finally the obtained standard signal can be sent to a recording medium such as a video recorder and the like to be recorded, or can be transmitted through a transmission system or sent to a monitor to be displayed.
The zoom lens is a device capable of enlarging the focal length multiple of a lens. If the focal length is not enough, a doubling mirror can be added in front of the lens. The calculation method is that a 2-time distance-increasing lens is sleeved on a lens with the original focal length of 50mm, and then the focal length of the lens is changed into 100 mm. That is, the multiple of the distance-increasing mirror is multiplied by the original focal length of the lens.
At present, a wide screen is generally used in a cinema, so in order to meet the requirement of showing a cinema, the image resolution of the formed image can be increased to the maximum extent by forming a stretched image on an image pickup element, and at present, the existing image pickup device is generally difficult to meet the requirement, so how to design a deformation doubling mirror which can be suitable for the wide screen on the image pickup device is an urgent problem to be solved.
Disclosure of Invention
The invention solves the technical problems in the prior art, and provides a high-definition camera device and a deformable multiplying mirror, wherein the distance of an image obtained on an image plane in one direction is increased, and the distance of the image obtained on the other direction is reduced, so that an image with a wide picture width can be formed, and the effect of a wide screen of the camera device is realized.
The technical scheme provided by the invention is as follows:
a high definition camera device comprising: an optical lens; and an image pickup element configured to receive an image formed by the optical lens; the optical lens and the image pickup element are also provided with a deformation multiplying lens; the deformation doubling mirror comprises the following components in sequence from the object plane side to the image plane side: a first adjusting lens group with negative focal power, a cylindrical lens group and a second adjusting lens group with positive focal power; the deformation doubling mirror meets the following conditional expression: EFL1/EFL2 < 0; the EFL1 is the focal length of the anamorphic multiplying mirror along a first preset direction, and the EFL2 is the focal length of the anamorphic multiplying mirror along a second preset direction; the first preset direction and the second preset direction are both perpendicular to the optical axis direction of the distortion multiplying mirror.
Preferably, the optical power of the cylindrical lens group along the first preset direction or the second preset direction is zero.
Preferably, the focal power of the lenses in the cylindrical lens group is zero along the direction in which the focal power of the cylindrical lenses is zero.
Preferably, at least one cemented lens is disposed in the first adjusting lens group; and/or at least one cemented lens is arranged in the cylindrical lens group; and/or at least one cemented lens is arranged in the second adjusting lens group.
Preferably, the anamorphic magnification lens satisfies the following conditional expression: -3 < EFL1/EFL2 < -1.
Preferably, the first adjustment lens group and/or the second adjustment lens group are curved toward the object surface side in a direction toward the object surface side, and the first adjustment lens group and/or the second adjustment lens group are curved toward the image surface side in a direction toward the image surface side.
Preferably, along the first preset direction, the cylindrical lens group comprises a first cylindrical lens with positive focal power, a second cylindrical lens with negative focal power, a fifth cylindrical lens with positive focal power and a sixth cylindrical lens with negative focal power; the first cylindrical lens is curved toward the object surface side in the vicinity of the object surface side, and the sixth cylindrical lens is curved toward the image surface side in the vicinity of the image surface side; the first cylindrical lens is glued with the second cylindrical lens, and the fifth cylindrical lens is glued with the sixth cylindrical lens; and along a second preset direction, all the lenses in the cylindrical lens group are plane mirrors.
Preferably, a third cylindrical lens with positive focal power and a fourth cylindrical lens with negative focal power are further arranged between the second cylindrical lens and the fifth cylindrical lens; the third cylindrical lens and the fourth cylindrical lens are glued.
Preferably, the abbe number of the first cylindrical lens is greater than 30 and less than 80, the abbe number of the second cylindrical lens is greater than 30 and less than 40, the abbe number of the third cylindrical lens is greater than 30 and less than 75, the abbe number of the fourth cylindrical lens is greater than 35 and less than 55, the abbe number of the fifth cylindrical lens is greater than 25 and less than 40, and the abbe number of the sixth cylindrical lens is greater than 50 and less than 90; the refractive index of the first cylindrical lens is greater than 1.6 and less than 2.1, the refractive index of the second cylindrical lens is greater than 1.6 and less than 1.8, the refractive index of the third cylindrical lens is greater than 1.5 and less than 1.85, the refractive index of the fourth cylindrical lens is greater than 1.6 and less than 1.75, the refractive index of the fifth cylindrical lens is greater than 1.6 and less than 1.95, and the refractive index of the sixth cylindrical lens is greater than 1.2 and less than 1.7.
Another object of the present invention is to provide a anamorphic magnification lens, comprising, in order from an object plane side to an image plane side: a first adjusting lens group with negative focal power, a cylindrical lens group and a second adjusting lens group with positive focal power; the deformation doubling mirror meets the following conditional expression: EFL1/EFL2 < 0; the EFL1 is the focal length of the anamorphic multiplying mirror along a first preset direction, and the EFL2 is the focal length of the anamorphic multiplying mirror along a second preset direction; the first preset direction and the second preset direction are both perpendicular to the optical axis direction of the distortion multiplying mirror.
Compared with the prior art, the high-definition camera device and the deformation doubling mirror provided by the invention have the following beneficial effects:
1. after the deformation multiplying lens is arranged on the optical lens, because the processing capacities of the deformation multiplying lens to light rays in two directions are different, the distance of an image obtained on an image surface in one direction is increased, and the distance of the image obtained on the other direction is reduced, so that an image with a wide picture width can be formed, and the effect of a wide screen of a camera device is realized; meanwhile, through the use of the cylindrical mirror, the effect of the magnifying lens can be formed only by a small number of lenses, the miniaturization of the camera device is realized, and the imaging aberration is also reduced;
2. the focal power of the lenses in the cylindrical lens group is zero along the direction that the focal power of the cylindrical lenses is zero; in the current state, the focal power of each lens of the cylindrical lens along the first preset direction or the second preset direction is zero, namely, the curvature radiuses of the left side and the right side of the cylindrical lens along the first preset direction or the second preset direction are both infinite, so that the cylindrical lens is convenient to process, and the design difficulty of designers is also reduced;
3. because the imaging quality of the deformed doubling mirror is sharply reduced in the process of changing into proportion, the chromatic aberration and astigmatism of the imaging are greatly improved and the imaging quality is improved through the arrangement of the cemented lens.
Drawings
The above features, technical features, advantages and implementations of a high-definition imaging apparatus and a anamorphic magnification mirror will be further described in the following preferred embodiments in a clearly understandable manner with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a high-definition camera device according to the present invention;
FIG. 2 is a schematic view of a anamorphic magnification lens of the present invention in a first predetermined orientation;
FIG. 3 is a schematic view of a anamorphic magnification lens of the present invention in a second predetermined orientation;
FIG. 4 is a schematic view of another anamorphic magnification lens of the present invention in a first predetermined orientation;
FIG. 5 is a schematic view of another anamorphic magnification lens of the present invention in a second predetermined orientation.
The reference numbers illustrate: 10. an optical lens; 20. a deformation doubling mirror; 30. an image pickup element; g1, a first adjusting lens group; g2, a cylindrical lens group; g3, a second adjusting lens group; l1, first lens; l2, second lens; l3, third lens; l4, fourth lens; l5, fifth lens; l6, sixth lens; l7, seventh lens; l8, eighth lens; l9, ninth lens; l10, tenth lens; l11, eleventh lens; l12, twelfth lens; l13, thirteenth lens; l14, fourteenth lens; l15, fifteenth lens; c1, a first cylindrical lens; c2, second cylindrical lens; c3, third cylindrical lens; c4, fourth cylindrical lens; c5, fifth cylindrical lens; c6, sixth cylindrical lens.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The first embodiment is as follows: as shown in fig. 1 to 3, a high-definition image pickup apparatus includes:
an optical lens 10;
and an image pickup element 30 configured to receive an image formed by the optical lens 10; the image pickup element 30 is a CCD or CMOS, and the image pickup element 30 can be disposed on the image side IMG of the optical lens 10.
The optical lens 10 and the image pickup element 30 are also provided with a anamorphic magnification lens 20;
the anamorphic magnification lens 20 includes, in order from the object plane side to the image plane side:
a first adjusting lens group G1 of negative power, a cylindrical lens group G2, and a second adjusting lens group G3 of positive power, the first adjusting lens group G1 being disposed on the left side, the second adjusting lens group G3 being disposed on the right side, the cylindrical lens group G2 being disposed in the middle.
The anamorphic magnification lens 20 satisfies the following conditional expression:
EFL1/ EFL2＜0；
wherein EFL1 is the focal length of the anamorphic magnification mirror 20 along a first preset direction, and EFL2 is the focal length of the anamorphic magnification mirror 20 along a second preset direction;
the first preset direction and the second preset direction are both perpendicular to the optical axis direction of the anamorphic magnification lens 20.
Specifically, in the present embodiment, the first preset direction and the second preset direction are both in a vertical plane, and preferably, the first preset direction is perpendicular to the second preset direction, the first preset direction is arranged along a horizontal direction, and the second preset direction is arranged along a vertical direction, so that the focal length of the anamorphic multiplying mirror 20 in one direction is positive, and the focal length of the anamorphic multiplying mirror 20 in the other direction is negative.
In this embodiment, after the anamorphic magnification lens 20 is disposed on the optical lens 10, because the anamorphic magnification lens 20 has different light processing capabilities in two directions, the distance of the image obtained on the image plane in one direction will be increased, and the distance in the other direction will be decreased, so as to form an image with a wide frame, thereby realizing the effect of a wide screen of the camera device; meanwhile, through the use of the cylindrical mirror, the effect of the magnifying lens can be formed only by a small number of lenses, the miniaturization of the camera device is realized, and the imaging aberration is also reduced.
Preferably, the optical power of the cylindrical lens group G2 along the first preset direction or the second preset direction is zero; when the focal length of the anamorphic magnification lens 20 is designed, after the focal lengths of the first adjusting lens group G1 and the second adjusting lens group G3 are determined, the focal length of the anamorphic magnification lens 20 in one direction can be determined in the current state, and a designer only needs to design the focal length in the other direction, thereby reducing the design difficulty of the designer.
The focal power of the lenses in the column lens group G2 in the direction of the focal power of the column lens is zero; under the current state, the focal power of each lens of the cylindrical lens along the first preset direction or the second preset direction is zero, namely along the directions, the curvature radiuses of the left side and the right side of the cylindrical lens are infinite, the cylindrical lens is convenient to process, and the design difficulty of designers is also reduced.
Example two: as shown in fig. 1 to 3, the present embodiment differs from the first embodiment in the specific structure of the anamorphic magnification lens 20.
In this embodiment, at least one cemented lens is disposed in the first adjusting lens group G1; and/or at least one cemented lens is arranged in the cylindrical lens group G2; and/or at least one cemented lens is provided in the second adjustment lens group G3.
Since the imaging quality of the anamorphic multiplying mirror 20 is sharply reduced in the process of changing the ratio, the chromatic aberration and astigmatism of the imaging are greatly improved and the imaging quality is increased by the arrangement of the cemented lens.
Specifically, the anamorphic magnification mirror 20 satisfies the following conditional expression:
-3 < EFL1/EFL2 < -1; preferably, EFL1/EFL 2= -2.
The realization of the specific magnification of the deformed magnifying lens 20 is realized by limiting the focal lengths of the deformed magnifying lens 20 in two directions, and the application range of the camera device is enlarged.
The first adjustment lens group G1 and/or the second adjustment lens group G3 are curved toward the object surface side closer to the object surface side, and the first adjustment lens group G1 and/or the second adjustment lens group G3 are curved toward the image surface side closer to the image surface side.
The left sides of the first adjusting lens group G1 and the second adjusting lens group G3 can be bent to the left side, and the right sides of the first adjusting lens group G1 and the second adjusting lens group G3 can be bent to the right side, so that the chief ray angle of the anamorphic magnification lens 20 is reduced in the current state, and the resolving power of the imaging device is increased.
Example three: as shown in fig. 1 to 3, the present embodiment is different from the first embodiment in the specific structure of the lenticular lens group G2.
In addition to the first embodiment, in the present embodiment, in the first preset direction, i.e., in the horizontal direction, the cylindrical lens group G2 includes a first cylindrical lens C1 with positive optical power, a second cylindrical lens C2 with negative optical power, a fifth cylindrical lens C5 with positive optical power, and a sixth cylindrical lens C6 with negative optical power.
The object-facing side of the first cylindrical lens C1 near the object surface is curved, the left side of the first cylindrical lens C1 is curved leftward, the image-facing side of the sixth cylindrical lens C6 near the image surface is curved, and the right side of the sixth cylindrical lens C6 is curved rightward.
The first cylindrical lens C1 and the second cylindrical lens C2 are cemented, and the fifth cylindrical lens C5 and the sixth cylindrical lens C6 are cemented;
in a second preset direction, namely in the vertical direction, the lenses in the cylindrical lens group G2 are all plane mirrors; in this embodiment, the structures in both directions can be replaced.
In the embodiment, the arrangement of the structure realizes the effect of wide picture width of the camera device; meanwhile, due to the arrangement of a double-Gaussian structure in one direction, the vertical axis chromatic aberration is well controlled; the arrangement of a plurality of cemented lenses improves chromatic aberration and astigmatism of imaging and increases imaging quality.
A third cylindrical lens C3 with positive focal power and a fourth cylindrical lens C4 with negative focal power are arranged between the second cylindrical lens C2 and the fifth cylindrical lens C5; the third cylindrical lens C3 is cemented with the fourth cylindrical lens C4.
By the arrangement of the third cylindrical lens C3 and the fourth cylindrical lens C4, chromatic aberration and astigmatism of imaging are further improved, and imaging quality is improved.
The abbe number of the first cylindrical lens C1 is more than 30 and less than 80, the abbe number of the second cylindrical lens C2 is more than 30 and less than 40, the abbe number of the third cylindrical lens C3 is more than 30 and less than 75, the abbe number of the fourth cylindrical lens C4 is more than 35 and less than 55, the abbe number of the fifth cylindrical lens C5 is more than 25 and less than 40, and the abbe number of the sixth cylindrical lens C6 is more than 50 and less than 90;
the refractive index of the first cylindrical lens C1 is greater than 1.6 and less than 2.1, the refractive index of the second cylindrical lens C2 is greater than 1.6 and less than 1.8, the refractive index of the third cylindrical lens C3 is greater than 1.5 and less than 1.85, the refractive index of the fourth cylindrical lens C4 is greater than 1.6 and less than 1.75, the refractive index of the fifth cylindrical lens C5 is greater than 1.6 and less than 1.95, and the refractive index of the sixth cylindrical lens C6 is greater than 1.2 and less than 1.7.
Example four: as shown in fig. 1 to 3, a high-definition image pickup apparatus includes:
an optical lens 10;
and an image pickup element 30 configured to receive an image formed by the optical lens 10; the image pickup element 30 is a CCD or CMOS, and the image pickup element 30 can be disposed on the image side IMG of the optical lens 10.
The optical lens 10 and the image pickup element 30 are also provided with a anamorphic magnification lens 20;
the anamorphic magnification lens 20 includes, in order from the object plane side to the image plane side:
a first adjusting lens group G1 of negative power, a cylindrical lens group G2, and a second adjusting lens group G3 of positive power.
The first adjustment lens group G1 includes a first lens L1 having positive refractive power, a second lens L2 having positive refractive power, a third lens L3 having positive refractive power, a fourth lens L4 having negative refractive power, a fifth lens L5 having negative refractive power, a sixth lens L6 having positive refractive power, a seventh lens L7 having positive refractive power, an eighth lens L8 having positive refractive power, a ninth lens L9 having positive refractive power, a tenth lens L10 having negative refractive power, and an eleventh lens L11 having positive refractive power; the fifth lens L5 is cemented with the sixth lens L6, and the tenth lens L10 is cemented with the eleventh lens L11.
In the first preset direction, the cylindrical lens group G2 comprises a first cylindrical lens C1 with positive focal power, a second cylindrical lens C2 with negative focal power, a third cylindrical lens C3 with positive focal power, a fourth cylindrical lens C4 with negative focal power, a fifth cylindrical lens C5 with negative focal power and a sixth cylindrical lens with negative focal power; the first cylindrical lens C1 is cemented with the second cylindrical lens C2, the third cylindrical lens C3 is cemented with the fourth cylindrical lens C4, and the fifth cylindrical lens C5 is cemented with the sixth cylindrical lens.
In the second predetermined direction, the lenses in the cylindrical lens group G2 are all plane mirrors.
The second adjustment lens group G3 includes a twelfth lens L12 having negative refractive power, a thirteenth lens L13 having positive refractive power, a fourteenth lens L14 having negative refractive power, a fifteenth lens L15 having positive refractive power, a sixteenth lens having negative refractive power, and a seventeenth lens having positive refractive power; the twelfth lens L12 is cemented with the thirteenth lens L13, the fourteenth lens L14 is cemented with the fifteenth lens L15, and the sixteenth lens is cemented with the seventeenth lens.
Table 1 shows basic lens data of the anamorphic magnification lens 20 of the present embodiment.
The plane number column indicates the plane number when the number is increased one by one toward the image side with the plane on the object side being the 1 st plane; the surface type column shows the surface type of a certain lens; the column Y curvature radius shows the curvature radius of a certain lens in the first preset direction, the column X curvature radius shows the curvature radius of a certain lens in the second preset direction, when the curvature radius is positive, the surface is bent towards the object side, and when the curvature radius is negative, the surface is bent towards the image side; the surface spacing on the optical axis of each surface from the surface adjacent to its image side is shown in the center thickness column; the refractive index of a certain lens is shown in the refractive index column; the abbe number of a certain lens is shown in the abbe number column.
[ TABLE 1 ]
In this example, EFL1=363.8mm, EFL2= -187.9mm, EFL1/EFL 2= -1.94, and TTL =332.32 mm.
Example five: as shown in fig. 1, 4, and 5, a high-definition image pickup apparatus includes:
an optical lens 10;
and an image pickup element 30 configured to receive an image formed by the optical lens 10; the image pickup element 30 is a CCD or CMOS, and the image pickup element 30 can be disposed on the image side IMG of the optical lens 10.
The optical lens 10 and the image pickup element 30 are also provided with an anamorphic magnification lens 20.
The anamorphic magnification lens 20 includes, in order from the object plane side to the image plane side:
a first adjusting lens group G1 of negative power, a cylindrical lens group G2, and a second adjusting lens group G3 of positive power.
The first adjustment lens group G1 includes a first lens L1 having positive refractive power, a second lens L2 having positive refractive power, a third lens L3 having negative refractive power, a fourth lens L4 having positive refractive power, a fifth lens L5 having positive refractive power, a sixth lens L6 having positive refractive power, a seventh lens L7 having positive refractive power, an eighth lens L8 having negative refractive power, and a ninth lens L9 having positive refractive power; the eighth lens L8 is cemented with the ninth lens L9.
In the first preset direction, the cylindrical lens group G2 comprises a first cylindrical lens C1 with positive focal power, a second cylindrical lens C2 with negative focal power, a third cylindrical lens C3 with positive focal power, a fourth cylindrical lens C4 with negative focal power, a fifth cylindrical lens C5 with negative focal power and a sixth cylindrical lens with negative focal power; the first cylindrical lens C1 is cemented with the second cylindrical lens C2, the third cylindrical lens C3 is cemented with the fourth cylindrical lens C4, and the fifth cylindrical lens C5 is cemented with the sixth cylindrical lens.
In the second predetermined direction, the lenses in the cylindrical lens group G2 are all plane mirrors.
The second adjustment lens group G3 includes a tenth lens L10 having negative refractive power, an eleventh lens L11 having positive refractive power, a twelfth lens L12 having negative refractive power, a thirteenth lens L13 having positive refractive power, a fourteenth lens L14 having negative refractive power, and a fifteenth lens L15 having positive refractive power; the tenth lens L10 is cemented with the eleventh lens L11, the twelfth lens L12 is cemented with the thirteenth lens L13, and the fourteenth lens L14 is cemented with the fifteenth lens L15.
Table 2 shows basic lens data of the anamorphic magnification lens 20 of the present embodiment.
The plane number column indicates the plane number when the number is increased one by one toward the image side with the plane on the object side being the 1 st plane; the surface type column shows the surface type of a certain lens; the column Y curvature radius shows the curvature radius of a certain lens in the first preset direction, the column X curvature radius shows the curvature radius of a certain lens in the second preset direction, when the curvature radius is positive, the surface is bent towards the object side, and when the curvature radius is negative, the surface is bent towards the image side; the surface spacing on the optical axis of each surface from the surface adjacent to its image side is shown in the center thickness column; the refractive index of a certain lens is shown in the refractive index column; the abbe number of a certain lens is shown in the abbe number column.
[ TABLE 2 ]
In this example, EFL1=534.8mm, EFL2= -217.4mm, EFL1/EFL 2= -2.46, TTL =323.91 mm.
Example five: as shown in fig. 2 to 5, a anamorphic magnification lens 20 includes, in order from an object plane side to an image plane side:
a first adjusting lens group G1 of negative power, a cylindrical lens group G2, and a second adjusting lens group G3 of positive power, the first adjusting lens group G1 being disposed on the left side, the second adjusting lens group G3 being disposed on the right side, the cylindrical lens group G2 being disposed in the middle.
The anamorphic magnification lens 20 satisfies the following conditional expression:
EFL1/ EFL2＜0；
wherein EFL1 is the focal length of the anamorphic magnification mirror 20 along a first preset direction, and EFL2 is the focal length of the anamorphic magnification mirror 20 along a second preset direction;
the first preset direction and the second preset direction are both perpendicular to the optical axis direction of the anamorphic magnification lens 20.
Specifically, in this embodiment, the first preset direction and the second preset direction are both in a vertical plane, and preferably, the first preset direction is perpendicular to the second preset direction, the first preset direction is arranged along a horizontal direction, and the second preset direction is arranged along a vertical direction, so that the focal length of the anamorphic multiplying mirror 20 in one direction is positive, and the focal length of the anamorphic multiplying mirror 20 in the other direction is negative.
In this embodiment, after the anamorphic magnification lens 20 is disposed on the optical lens 10, because the anamorphic magnification lens 20 has different light processing capabilities in two directions, the distance of the image obtained on the image plane in one direction will be increased, and the distance in the other direction will be decreased, so that an image with a wide frame width can be formed.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A high definition image pickup apparatus, comprising:
an optical lens;
and an image pickup element configured to receive an image formed by the optical lens;
the optical lens and the image pickup element are also provided with a deformation multiplying lens;
the deformation doubling mirror comprises the following components in sequence from the object plane side to the image plane side:
a first adjusting lens group with negative focal power, a cylindrical lens group and a second adjusting lens group with positive focal power;
the deformation doubling mirror meets the following conditional expression:
EFL1/ EFL2＜0；
the EFL1 is the focal length of the anamorphic multiplying mirror along a first preset direction, and the EFL2 is the focal length of the anamorphic multiplying mirror along a second preset direction;
the first preset direction and the second preset direction are both perpendicular to the optical axis direction of the deformable multiplying mirror;
the first preset direction is perpendicular to the second preset direction;
along a first preset direction, the cylindrical lens group comprises a first cylindrical lens with positive focal power, a second cylindrical lens with negative focal power, a fifth cylindrical lens with positive focal power and a sixth cylindrical lens with negative focal power;
the first cylindrical lens is curved toward the object surface side in the vicinity of the object surface side, and the sixth cylindrical lens is curved toward the image surface side in the vicinity of the image surface side;
the first cylindrical lens is glued with the second cylindrical lens, and the fifth cylindrical lens is glued with the sixth cylindrical lens;
and along a second preset direction, all the lenses in the cylindrical lens group are plane mirrors.
2. The high-definition imaging device according to claim 1, characterized in that:
the focal power of the cylindrical lens group along the first preset direction or the second preset direction is zero.
3. The high-definition imaging device according to claim 2, characterized in that:
and focal powers of the lenses in the cylindrical lens group are all zero along the direction that the focal power of the cylindrical lens is zero.
4. The high-definition imaging device according to claim 1, characterized in that:
at least one cemented lens is arranged in the first adjusting lens group;
and/or
At least one cemented lens is arranged in the cylindrical lens group;
and/or
At least one cemented lens is arranged in the second adjusting lens group.
5. The high-definition imaging device according to claim 1, characterized in that:
the deformation doubling mirror meets the following conditional expression:
-3＜EFL1/ EFL2＜-1。
6. the high-definition imaging device according to claim 1, characterized in that:
the first adjustment lens group and/or the second adjustment lens group are curved toward the object surface side in a direction toward the object surface side, and the first adjustment lens group and/or the second adjustment lens group are curved toward the image surface side in a direction toward the image surface side.
7. The high-definition imaging device according to claim 1, characterized in that:
a third cylindrical lens with positive focal power and a fourth cylindrical lens with negative focal power are arranged between the second cylindrical lens and the fifth cylindrical lens;
the third cylindrical lens and the fourth cylindrical lens are glued.
8. The high-definition imaging device according to claim 7, characterized in that:
the abbe number of the first cylindrical lens is larger than 30 and smaller than 80, the abbe number of the second cylindrical lens is larger than 30 and smaller than 40, the abbe number of the third cylindrical lens is larger than 30 and smaller than 75, the abbe number of the fourth cylindrical lens is larger than 35 and smaller than 55, the abbe number of the fifth cylindrical lens is larger than 25 and smaller than 40, and the abbe number of the sixth cylindrical lens is larger than 50 and smaller than 90;
the refractive index of the first cylindrical lens is greater than 1.6 and less than 2.1, the refractive index of the second cylindrical lens is greater than 1.6 and less than 1.8, the refractive index of the third cylindrical lens is greater than 1.5 and less than 1.85, the refractive index of the fourth cylindrical lens is greater than 1.6 and less than 1.75, the refractive index of the fifth cylindrical lens is greater than 1.6 and less than 1.95, and the refractive index of the sixth cylindrical lens is greater than 1.2 and less than 1.7.
9. A anamorphic magnification mirror comprising, in order from an object plane side to an image plane side:
a first adjusting lens group with negative focal power, a cylindrical lens group and a second adjusting lens group with positive focal power;
the deformation doubling mirror meets the following conditional expression:
EFL1/ EFL2＜0；
the EFL1 is the focal length of the anamorphic multiplying mirror along a first preset direction, and the EFL2 is the focal length of the anamorphic multiplying mirror along a second preset direction;
the first preset direction and the second preset direction are both perpendicular to the optical axis direction of the deformable multiplying mirror;
the first preset direction is perpendicular to the second preset direction;
along a first preset direction, the cylindrical lens group comprises a first cylindrical lens with positive focal power, a second cylindrical lens with negative focal power, a fifth cylindrical lens with positive focal power and a sixth cylindrical lens with negative focal power;
the first cylindrical lens is curved toward the object surface side in the vicinity of the object surface side, and the sixth cylindrical lens is curved toward the image surface side in the vicinity of the image surface side;
the first cylindrical lens is glued with the second cylindrical lens, and the fifth cylindrical lens is glued with the sixth cylindrical lens;
and along a second preset direction, all the lenses in the cylindrical lens group are plane mirrors.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010666434.0A CN111538153B (en) | 2020-07-13 | 2020-07-13 | High definition camera device and deformation doubling mirror |
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| CN202010666434.0A CN111538153B (en) | 2020-07-13 | 2020-07-13 | High definition camera device and deformation doubling mirror |
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| CN111538153A CN111538153A (en) | 2020-08-14 |
| CN111538153B true CN111538153B (en) | 2020-10-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113655605B (en) * | 2021-08-23 | 2022-09-02 | 嘉兴中润光学科技股份有限公司 | Magnifying lens, optical system and imaging device |
| CN114740609B (en) * | 2022-03-07 | 2024-03-29 | 嘉兴中润光学科技股份有限公司 | Front-mounted doubling mirror and imaging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4537108B2 (en) * | 2004-04-12 | 2010-09-01 | キヤノン株式会社 | Anamorphic converter |
| JP5533798B2 (en) * | 2011-07-04 | 2014-06-25 | セイコーエプソン株式会社 | Projection optical system and projector equipped with the same |
| US9239449B2 (en) * | 2013-04-04 | 2016-01-19 | Cooke Optics Ltd. | Anamorphic objective zoom lens |
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Address after: 314000 No.188, Taojing Road, Gaozhao street, Xiuzhou District, Jiaxing City, Zhejiang Province Patentee after: Jiaxing Zhongrun Optical Technology Co.,Ltd. Address before: 314000 No.188, Taojing Road, Gaozhao street, Xiuzhou District, Jiaxing City, Zhejiang Province Patentee before: JIAXING ZHONGRUN OPTICAL SCIENCE AND TECHNOLOGY Co.,Ltd. |