A large image surface and large variable magnification zoom optical lens

Abstract

The present invention discloses a large image plane and large magnification ratio zoom optical lens, which is composed of a transmission group G1 with positive optical power, a transmission group G2 with negative optical power, an aperture stop, a transmission group G3 with positive optical power, a transmission group G4 with positive optical power, a filter and an image plane, which are arranged in sequence from the object side to the image side. The focal length is changed by the movement of the transmission group G2 along the optical axis, and at the same time, a position can be found through the cooperative movement of the transmission group G4 along the optical axis, so that the image plane position of the optical system remains unchanged and the imaging is clear. Under the condition of matching the large image plane, large magnification ratio optical imaging is realized at the same time, so that the product performance and appearance size are well matched, and thus it can be widely applied to technical fields such as security monitoring.

Description

Technical Field

[0001] The invention belongs to the field of optical technology, and in particular relates to a zoom optical lens with a large image plane and a large magnification ratio. Background Art

[0002] With the continuous advancement of CMOS device technology, the photosensitive surface of image sensors is getting larger and larger, allowing the optical system to receive more light energy. In the field of security monitoring, there is a great demand for sensors with large image surfaces. In large squares, wide roads, border defenses, forest protection and other occasions, it is necessary to view the overall range and track key local ranges. This requires a large zoom ratio optical system that can match the large image surface and take into account wide angle and telephoto.

[0003] The existing zoom optical systems either have a large zoom ratio but a small image surface, or a large image surface but a small zoom ratio. It is impossible to have an optical system with a large zoom ratio and a large image surface at the same time. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, a large image plane and large zoom ratio optical lens is proposed, which changes the focal length by moving the transmission group G2 along the optical axis, and can find a position by the coordinated movement of the transmission group G4 along the optical axis, so that the image plane position of the optical system remains unchanged and the image is clear. Under the condition of matching the large image plane sensor, large zoom ratio optical imaging is achieved at the same time, so that the product performance and appearance size are well matched, so that it can be widely used in technical fields such as security monitoring.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a large image plane and large zoom ratio optical lens. It is composed of a transmission group G1 with positive focal power, a transmission group G2 with negative focal power, an aperture stop, a transmission group G3 with positive focal power, a transmission group G4 with positive focal power, a filter and an image plane, which are arranged in sequence from the object side to the image side;

[0006] The transmission group G1 is composed of a first lens, a second lens, a third lens and a fourth lens arranged in sequence from the object side to the image side, wherein the first lens is a negative lens, and the second lens, the third lens and the fourth lens are positive lenses;

[0007] The transmission group G2 is composed of a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side, wherein the fifth lens and the sixth lens are negative lenses, and the seventh lens and the eighth lens are positive lenses;

[0008] The transmission group G3 is composed of a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens arranged in sequence from the object side to the image side. Among them, the tenth lens and the twelfth lens are negative lenses, and the ninth lens, the eleventh lens, and the thirteenth lens are positive lenses;

[0009] The transmission group G4 is composed of a fourteenth lens, a fifteenth lens, and a sixteenth lens arranged in sequence from the object side to the image side. Among them, the fifteenth lens is a negative lens, and the fourteenth lens and the sixteenth lens are positive lenses.

[0010] For a large image plane and large magnification ratio zoom optical lens according to the present invention, a further preferred technical solution is:

[0011] At the short focal position, the ratio range of the focal length of the transmission group G1 to the focal length of the entire optical system is (5.18, 7.51), the ratio range of the focal length of the transmission group G2 to the focal length of the entire optical system is (-1.42, -1.25), the ratio range of the focal length of the transmission group G3 to the focal length of the entire optical system is (4.27, 4.82), and the ratio range of the focal length of the transmission group G4 to the focal length of the entire optical system is (2.88, 3.11);

[0012] At the medium focal position, the ratio range of the focal length of the transmission group G1 to the focal length of the entire optical system is (0.66, 0.93), the ratio range of the focal length of the transmission group G2 to the focal length of the entire optical system is (-0.26, -0.08), the ratio range of the focal length of the transmission group G3 to the focal length of the entire optical system is (0.27, 1.82), and the ratio range of the focal length of the transmission group G4 to the focal length of the entire optical system is (0.23, 0.51);

[0013] At the long focal position, the ratio range of the focal length of the transmission group G1 to the focal length of the entire optical system is (0.13, 0.62), the ratio range of the focal length of the transmission group G2 to the focal length of the entire optical system is (-0.08, -0.06), the ratio range of the focal length of the transmission group G3 to the focal length of the entire optical system is (0.22, 0.32), and the ratio range of the focal length of the transmission group G4 to the focal length of the entire optical system is (0.09, 0.22).

[0014] For a large image plane and large magnification ratio zoom optical lens according to the present invention, a further preferred technical solution is: the first lens and the second lens of the transmission group G1 form a cemented lens group; the sixth lens and the seventh lens of the transmission group G2 form a cemented lens group; the tenth lens and the eleventh lens of the transmission group G3 form a cemented lens group, and the twelfth lens and the thirteenth lens form a cemented lens group; the fourteenth lens and the fifteenth lens of the transmission group G4 form a cemented lens group.

[0015] A large image plane and large magnification ratio zoom optical lens according to the present invention, a further preferred technical solution thereof is: the surface of the first lens facing the object plane is convex, and the surface facing the image plane is concave;

[0016] The surface of the second lens facing the object plane is convex, and the surface facing the image plane is convex;

[0017] The surface of the third lens facing the object plane is convex, and the surface facing the image plane is concave;

[0018] The surface of the fourth lens facing the object plane is convex, and the surface facing the image plane is concave;

[0019] The surface of the fifth lens facing the object plane is convex, and the surface facing the image plane is concave;

[0020] The surface of the sixth lens facing the object plane is concave, and the surface facing the image plane is concave;

[0021] The surface of the seventh lens facing the object plane is convex, and the surface facing the image plane is concave;

[0022] The surface of the eighth lens facing the object plane is convex, and the surface facing the image plane is concave;

[0023] The surface of the ninth lens facing the object plane is convex, and the surface facing the image plane is convex;

[0024] The surface of the tenth lens facing the object plane is convex, and the surface facing the image plane is concave;

[0025] The surface of the eleventh lens facing the object plane is convex, and the surface facing the image plane is concave;

[0026] The surface of the twelfth lens facing the object plane is convex, and the surface facing the image plane is concave;

[0027] The surface of the thirteenth lens facing the object plane is convex, and the surface facing the image plane is concave;

[0028] The surface of the fourteenth lens facing the object plane is convex, and the surface facing the image plane is convex;

[0029] The surface of the fifteenth lens facing the object plane is concave, and the surface facing the image plane is convex;

[0030] The surface of the sixteenth lens facing the object plane is convex, and the surface facing the image plane is convex.

[0031] A large image plane and large magnification ratio zoom optical lens according to the present invention, a further preferred technical solution thereof is: among the first to sixteenth lenses, the third lens and the ninth lens are aspherical lenses, and the remaining lenses are all spherical lenses.

[0032] A large image plane and large zoom ratio zoom optical lens according to the present invention, a further preferred technical solution thereof is: the transmission group G2 and the transmission group G3 are moving groups, and the transmission group G1 and the transmission group G4 are fixed groups.

[0033] Compared with the prior art, the technical solution of the present invention has the following advantages / beneficial effects:

[0034] The present invention changes the focal length by the movement of the transmission group G2 along the optical axis, and at the same time, a position can be found through the cooperative movement of the transmission group G4 along the optical axis, so that the image plane position of the optical system remains unchanged and the imaging is clear. Under the condition of matching a large image plane, a large zoom ratio optical imaging is realized at the same time, so that the product performance and the appearance size are well matched, and thus it can be widely applied to technical fields such as security monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a schematic structural diagram of a large image plane and large zoom ratio zoom optical lens of the present invention.

[0037] Figure 2 It is a fan diagram of the short focal length in Embodiment 2 of a large image plane and large zoom ratio zoom optical lens of the present invention.

[0038] Figure 3 It is a fan diagram of the medium focal length in Embodiment 2 of a large image plane and large zoom ratio zoom optical lens of the present invention.

[0039] Figure 4 It is a fan diagram of the long focal length in Embodiment 2 of a large image plane and large zoom ratio zoom optical lens of the present invention.

[0040] Figure 5 It is a spot diagram of the short focal length in Embodiment 2 of a large image plane and large zoom ratio zoom optical lens of the present invention.

[0041] Figure 6 It is a spot diagram of the medium focal length in Embodiment 2 of a large image plane and large zoom ratio zoom optical lens of the present invention.

[0042] Figure 7 It is a spot diagram of the long focal length in Embodiment 2 of a large image plane and large zoom ratio zoom optical lens of the present invention.

[0043] The markings in the figure are respectively: 1. First lens, 2. Second lens, 3. Third lens, 4. Fourth lens, 5. Fifth lens, 6. Sixth lens, 7. Seventh lens, 8. Eighth lens, 9. Ninth lens, 10. Tenth lens, 11. Eleventh lens, 12. Twelfth lens, 13. Thirteenth lens, 14. Fourteenth lens, 15. Fifteenth lens, 16. Sixteenth lens, 17. Filter, 18. Image plane. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0046] Embodiment 1:

[0047] As Figure 1 shown, a large image plane and large magnification ratio zoom optical lens is composed of a transmission group G1, a transmission group G2, an aperture stop (STO), a transmission group G3, a transmission group G4, a filter 17 and an image plane 18 which are sequentially arranged from the object side to the image side. The transmission group G2 and the transmission group G3 are moving groups, and the transmission group G1 and the transmission group G4 are fixed groups.

[0048] The transmission group G1 is a transmission group with positive optical power, and includes a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4. The first lens 1 is a negative lens, and the second lens 2, the third lens 3 and the fourth lens 4 are positive lenses. The first lens 1 and the second lens 2 form a cemented lens group. The surface of the first lens 1 facing the object plane is convex, and the surface facing the image plane 18 is concave; the surface of the second lens 2 facing the object plane is convex, and the surface facing the image plane 18 is convex; the surface of the third lens 3 facing the object plane is convex, and the surface facing the image plane 18 is concave; the surface of the fourth lens 4 facing the object plane is convex, and the surface facing the image plane 18 is concave.

[0049] The transmissive group G2 is a transmissive group with a negative optical power, including a fifth lens 5, a sixth lens 6, a seventh lens 7, and an eighth lens 8. The fifth lens 5 and the sixth lens 6 are negative lenses, and the seventh lens 7 and the eighth lens 8 are positive lenses. The sixth lens 6 and the seventh lens 7 form a cemented lens group. The surface of the fifth lens 5 facing the object surface is convex, and the surface facing the image surface 18 is concave; the surface of the sixth lens 6 facing the object surface is concave, and the surface facing the image surface 18 is concave; the surface of the seventh lens 7 facing the object surface is convex, and the surface facing the image surface 18 is concave; the surface of the eighth lens 8 facing the object surface is convex, and the surface facing the image surface 18 is concave.

[0050] The transmissive group G3 is a transmissive group with a positive optical power, including a ninth lens 9, a tenth lens 10, an eleventh lens 11, a twelfth lens 12, and a thirteenth lens 13. The eleventh lens 11, the twelfth lens 12, and the thirteenth lens 13 are negative lenses. The ninth lens 9 and the tenth lens 10 are positive lenses. The tenth lens 10 and the twelfth lens 12 are negative lenses, and the ninth lens 9, the eleventh lens 11, and the thirteenth lens 13 are positive lenses. The surface of the ninth lens 9 facing the object surface is convex, and the surface facing the image surface 18 is convex; the surface of the tenth lens 10 facing the object surface is convex, and the surface facing the image surface 18 is concave; the surface of the eleventh lens 11 facing the object surface is convex, and the surface facing the image surface 18 is concave; the surface of the twelfth lens 12 facing the object surface is convex, and the surface facing the image surface 18 is concave; the surface of the thirteenth lens 13 facing the object surface is convex, and the surface facing the image surface 18 is concave.

[0051] The transmissive group G4 is a transmissive group with a positive optical power, including a fourteenth lens, a fifteenth lens 15, and a sixteenth lens 16. The fifteenth lens 15 is a negative lens, and the fourteenth lens 14 and the sixteenth lens are positive lenses. The fourteenth lens 14 and the fifteenth lens 15 form a cemented lens group. The surface of the fourteenth lens 14 facing the object surface is convex, and the surface facing the image surface 18 is convex; the surface of the fifteenth lens 15 facing the object surface is concave, and the surface facing the image surface 18 is convex; the surface of the sixteenth lens 16 facing the object surface is convex, and the surface facing the image surface 18 is convex.

[0052] At the short focal position, the ratio range of the focal length of the transmissive group G1 to the focal length of the entire optical system is (5.18, 7.51), the ratio range of the focal length of the transmissive group G2 to the focal length of the entire optical system is (-1.42, -1.25), the ratio range of the focal length of the transmissive group G3 to the focal length of the entire optical system is (4.27, 4.82), and the ratio range of the focal length of the transmissive group G4 to the focal length of the entire optical system is (2.88, 3.11);

[0053] When in the middle - focal - length position, the ratio range of the focal length of the transmissive group G1 to the focal length of the entire optical system is (0.66, 0.93), the ratio range of the focal length of the transmissive group G2 to the focal length of the entire optical system is (-0.26, -0.08), the ratio range of the focal length of the transmissive group G3 to the focal length of the entire optical system is (0.27, 1.82), and the ratio range of the focal length of the transmissive group G4 to the focal length of the entire optical system is (0.23, 0.51);

[0054] When in the long - focal - length position, the ratio range of the focal length of the transmissive group G1 to the focal length of the entire optical system is (0.13, 0.62), the ratio range of the focal length of the transmissive group G2 to the focal length of the entire optical system is (-0.08, -0.06), the ratio range of the focal length of the transmissive group G3 to the focal length of the entire optical system is (0.22, 0.32), and the ratio range of the focal length of the transmissive group G4 to the focal length of the entire optical system is (0.09, 0.22).

[0055] Among the first to the sixteenth lenses, the third lens 3 and the ninth lens 9 are aspherical lenses, and the rest of the lenses are spherical lenses.

[0056] Example 2:

[0057] Based on Example 1, the actual situation of a large - image - plane large - magnification - ratio zoom optical system is as follows:

[0058] The ratio range of the focal length of the transmissive group G1 to the focal length of the entire optical system at the short - focal - length is 6.20, the ratio range of the focal length of the transmissive group G1 to the focal length of the entire optical system at the middle - focal - length is 0.69, and the ratio range of the focal length of the transmissive group G1 to the focal length of the entire optical system at the long - focal - length is 0.34.

[0059] The ratio range of the focal length of the transmissive group G2 to the focal length of the entire optical system at the short - focal - length is -1.28, the ratio range of the focal length of the transmissive group G2 to the focal length of the entire optical system at the middle - focal - length is -0.14, and the ratio range of the focal length of the transmissive group G2 to the focal length of the entire optical system at the long - focal - length is -0.07.

[0060] The ratio range of the focal length of the transmissive group G3 to the focal length of the entire optical system at the short - focal - length is 4.39, the ratio range of the focal length of the transmissive group G3 to the focal length of the entire optical system at the middle - focal - length is 0.49, and the ratio range of the focal length of the transmissive group G3 to the focal length of the entire optical system at the long - focal - length is 0.25.

[0061] The ratio range of the focal length of the transmissive group G4 to the focal length of the entire optical system at the short - focal - length is 2.92, the ratio range of the focal length of the transmissive group G4 to the focal length of the entire optical system at the middle - focal - length is 0.33, and the ratio range of the focal length of the transmissive group G4 to the focal length of the entire optical system at the long - focal - length is 0.16.

[0062] The physical parameters of each lens of a large image plane and large zoom ratio zoom optical lens in this embodiment meet the data requirements shown in Table 1:

[0063] Table 1 Physical Parameters of Each Lens

[0064]

[0065] The equation of the aspheric surface is as follows:

[0066]

[0067] Regarding the definition of the aspheric shape, the aspheric shape is defined as follows:

[0068] y: Radial coordinate starting from the optical axis.

[0069] z: Offset in the optical axis direction starting from the intersection point of the aspheric surface and the optical axis.

[0070] r: Curvature radius of the reference spherical surface of the aspheric surface.

[0071] k is the conic constant, and A4, A6, A8, A10, A12 are the aspheric coefficients of the 4th, 6th, 8th, 10th, and 12th orders.

[0072] Surfaces 4 and 5 of the third lens are aspheric surfaces. Surfaces 16 and 17 of the ninth lens are aspheric surfaces (the above all refer to the surface numbers).

[0073] In Table 2, the 4th, 6th, 8th, 10th, and 12th order aspheric coefficients A4, A6, A8, A10, A12 of the aspheric surface and the conic constant k are given together.

[0074] Table 2 Aspheric Parameters

[0075]

[0076] The optical system provided by a large image plane and large zoom ratio zoom optical lens in this embodiment has the following optical technical indicators:

[0077] Operating wavelength range: 435 nm - 656 nm;

[0078] Total optical length TTL < 82 mm;

[0079] Focal length f: 5.6 mm (W) ~ 100.8 mm (T);

[0080] Field of view: 70° (W) ~ 3.8° (T);

[0081] Optical distortion: -9.5% (W) ~ +2.6% (T);

[0082] Image plane size: Φ7mm.

[0083] Note: W represents short focal length, and T represents long focal length.

[0084] As Figures 2 - 4 shown, the ray aberration curves of the large image plane and large zoom ratio zoom optical system at short, medium, and long focal lengths are given. It can be seen that the meridional aberration and sagittal aberration within the entire focal length range of the large image plane and large zoom ratio zoom optical system are both small. In the figure, ex: x-component of ray aberration, ey: y-component of ray aberration, px: x entrance pupil coordinate, py: y entrance pupil coordinate.

[0085] As Figures 5 - 7 shown, the field curvature and distortion curves of the large image plane and large zoom ratio zoom optical system at short, medium, and long focal lengths are given. It can be seen that the absolute value of distortion within the entire spectral range and full field of view of the short focal length of the large image plane and large zoom ratio zoom optical system is better than 9.5%, and the absolute value of distortion within the entire spectral range and full field of view of the long focal length is better than 2.6%.

[0086] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0087] The above are only the preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as a limitation of the present invention. The protection scope of the present invention should be subject to the scope defined by the claims. For those of ordinary skill in the art of this technology, within the spirit and scope of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A zoom optical lens with a large image area and a large magnification ratio, characterized in that: It is composed of a transmission group G1 with positive optical power, a transmission group G2 with negative optical power, an aperture stop, a transmission group G3 with positive optical power, a transmission group G4 with positive optical power, a filter and an image plane, which are arranged in sequence from the object side to the image side; The transmission group G1 is composed of a first lens, a second lens, a third lens and a fourth lens arranged in sequence from the object side to the image side, wherein the first lens is a negative lens, and the second lens, the third lens and the fourth lens are positive lenses; The transmission group G2 is composed of a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in sequence from the object side to the image side, wherein the fifth lens and the sixth lens are negative lenses, and the seventh lens and the eighth lens are positive lenses; The transmission group G3 is composed of a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens arranged in sequence from the object side to the image side, wherein the tenth lens and the twelfth lens are negative lenses, and the ninth lens, the eleventh lens and the thirteenth lens are positive lenses; The transmission group G4 consists of a fourteenth lens, a fifteenth lens and a sixteenth lens arranged in sequence from the object side to the image side, wherein the fifteenth lens is a negative lens, and the fourteenth lens and the sixteenth lens are positive lenses.

2. The large image plane and large magnification ratio zoom optical lens according to claim 1, characterized in that: At the short focal position, the ratio of the focal length of the transmission group G1 to the focal length of the entire optical system is in the range of (5.18, 7.51), the ratio of the focal length of the transmission group G2 to the focal length of the entire optical system is in the range of (-1.42, -1.25), the ratio of the focal length of the transmission group G3 to the focal length of the entire optical system is in the range of (4.27, 4.82), and the ratio of the focal length of the transmission group G4 to the focal length of the entire optical system is in the range of (2.88, 3.11); At the mid-focus position, the ratio of the focal length of the transmission group G1 to the focal length of the entire optical system is in the range of (0.66, 0.93), the ratio of the focal length of the transmission group G2 to the focal length of the entire optical system is in the range of (-0.26, -0.08), the ratio of the focal length of the transmission group G3 to the focal length of the entire optical system is in the range of (0.27, 1.82), and the ratio of the focal length of the transmission group G4 to the focal length of the entire optical system is in the range of (0.23, 0.51); At the telephoto position, the ratio of the focal length of the transmission group G1 to the focal length of the entire optical system is in the range of (0.13, 0.62), the ratio of the focal length of the transmission group G2 to the focal length of the entire optical system is in the range of (-0.08, -0.06), the ratio of the focal length of the transmission group G3 to the focal length of the entire optical system is in the range of (0.22, 0.32), and the ratio of the focal length of the transmission group G4 to the focal length of the entire optical system is in the range of (0.09, 0.22).

3. The large image plane and large magnification ratio zoom optical lens according to claim 1, characterized in that: The first lens and the second lens of the transmission group G1 form a cemented lens group; the sixth lens and the seventh lens of the transmission group G2 form a cemented lens group; the tenth lens and the eleventh lens of the transmission group G3 form a cemented lens group, and the twelfth lens and the thirteenth lens form a cemented lens group; the fourteenth lens and the fifteenth lens of the transmission group G4 form a cemented lens group.

4. The large image plane and large variable magnification zoom optical lens according to claim 1, characterized in that: The surface of the first lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the second lens facing the object plane is convex, and the surface facing the image plane is convex; The surface of the third lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the fourth lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the fifth lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the sixth lens facing the object plane is concave, and the surface facing the image plane is concave; The surface of the seventh lens element facing the object plane is convex, and the surface facing the image plane is concave; The surface of the eighth lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the ninth lens facing the object plane is convex, and the surface facing the image plane is convex; The surface of the tenth lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the eleventh lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the twelfth lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the thirteenth lens facing the object plane is convex, and the surface facing the image plane is concave; The surface of the fourteenth lens facing the object plane is convex, and the surface facing the image plane is convex; The surface of the fifteenth lens facing the object plane is concave, and the surface facing the image plane is convex; The surface of the sixteenth lens facing the object plane is convex, and the surface facing the image plane is convex.

5. The large image plane and large magnification ratio zoom optical lens according to claim 1, characterized in that: Among the first to sixteenth lenses, the third lens and the ninth lens are aspherical lenses, and the remaining lenses are spherical lenses.

6. The large image plane and large variable magnification zoom optical lens according to claim 1, characterized in that: The transmission group G2 and the transmission group G3 are moving groups, and the transmission group G1 and the transmission group G4 are fixed groups.

Images