WO1999036821A1 - Objectif zoom, et camera video et appareil photographique electronique comportant ledit objectif - Google Patents
Objectif zoom, et camera video et appareil photographique electronique comportant ledit objectif Download PDFInfo
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- WO1999036821A1 WO1999036821A1 PCT/JP1999/000088 JP9900088W WO9936821A1 WO 1999036821 A1 WO1999036821 A1 WO 1999036821A1 JP 9900088 W JP9900088 W JP 9900088W WO 9936821 A1 WO9936821 A1 WO 9936821A1
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- lens
- refractive power
- lens group
- zoom lens
- zoom
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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
- G02B15/144—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 having four groups only
- G02B15/1441—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 having four groups only the first group being positive
- G02B15/144113—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 having four groups only the first group being positive arranged +-++
Definitions
- the present invention relates to a zoom lens having a wide angle of view of 60 ° or more and a high zoom ratio of about 10 times and a short overall length, which is used for a single-panel video camera or the like.
- FIG. 35 is a configuration diagram of a conventional zoom lens for a video camera.
- the zoom lens shown in this figure has a first lens group 35 1 as a condenser section, a second lens group 35 2 as a magnification section, a third lens group 35 3 as a condenser section, and a focus section.
- the first lens group 351 fixed to the image plane 356 has an image forming action.
- the third lens group 353, which is a fixed group, has an action of condensing divergent light generated by the second lens group.
- the fourth lens group 354, which moves back and forth on the optical axis, has a focusing action.
- the total length of the zoom lens is larger than the effective diameter of the lens closest to the object side. Since it is relatively long and lacks compactness, there has been a problem that it is not possible to meet the above demands for downsizing and high performance. In addition, it has been difficult for conventional zoom lens design techniques to satisfy all of large aperture, high magnification, miniaturization, and high resolution. Disclosure of the invention
- the present invention solves the above-mentioned problem, and has a small number of lenses, a zoom ratio of about 10 times, and an angle of view of about 60.
- An object of the present invention is to provide a compact and wide-angle zoom lens and a video camera and an electronic still camera using the zoom lens.
- a zoom lens according to the present invention includes, in order from the object side as a subject, a first lens group having a positive refractive power and fixed with respect to an image plane; and a negative lens.
- a second lens group that performs a zooming action by moving on the optical axis, a third lens group that is fixed with respect to an image plane and has a positive refractive power, and a movement of the second lens group and a subject.
- the lens group includes, in order from the object side, a lens having a negative refractive power, A lens having a positive refractive power, a meniscus lens having a positive refractive power and the object side having a convex surface, the second lens group having a negative refractive power in order from the object side, and having a negative refractive power.
- the third lens group is composed of a biconcave lens, and a lens having a positive refractive power and the object side joined to the biconcave lens having a convex surface, and the third lens group has a positive refractive power in order from the object side.
- Each of the second, third and fourth lens groups has at least If the effective diameter of the lens closest to the object side in the first lens group is CL 1 and the distance from the lens closest to the object side in the first lens group to the image plane is L,
- the aberrations are sufficiently corrected by the interaction of each lens group, and a high-power, compact, wide-angle zoom lens can be obtained with a simple configuration.
- the lens having a negative refractive power of the third lens group is joined to a lens having a positive refractive power of the third lens group and having a convex surface facing the object side, It is preferable that the lens having a negative refractive power of the third lens group has a concave surface on the image plane side, and the cemented lens has a negative refractive power as a whole.
- the focal length of the fourth lens group is f4
- the focal length of the fourth lens group is f 4 and the focal length at the wide-angle end is fw, 0. 3 ⁇ fw / f 4 ⁇ 0. 4
- the object-side surface has a positive refractive power of the third lens unit and has an air gap with a lens having a convex surface facing the object side. It is arranged
- the focal length of the fourth lens group is f 4 and the focal length at the wide-angle end is f w,
- a zoom ratio is preferably about 10 times. According to the above-described zoom lens, according to the above-mentioned zoom lens, a compact, wide-angle zoom lens with high magnification can be obtained.
- the video camera of the present invention uses one of the zoom lenses. It is characterized by having been. According to the above-described video camera, a compact, lightweight, and high-performance video camera can be realized because the zoom lens of the present invention is used.
- an electronic still camera according to the present invention is characterized by using any one of the zoom lenses.
- the zoom lens of the present invention is used, a small, lightweight, and high-performance electronic still camera can be realized.
- FIG. 1 is a configuration diagram of a zoom lens according to Embodiment 1 of the present invention.
- FIG. 2 is a configuration diagram of a zoom lens according to Embodiment 2 of the present invention.
- FIG. 3 is a diagram illustrating aberration performance at the wide-angle end of the zoom lens according to the first embodiment.
- FIG. 4 is a diagram illustrating aberration diagrams at a standard position of the zoom lens according to the first embodiment.
- FIG. 5 is a diagram illustrating an aberration diagram at a telephoto end of the zoom lens according to the first embodiment.
- FIG. 6 is a diagram illustrating aberration performance at the wide-angle end of the zoom lens according to the second embodiment.
- FIG. 7 is a diagram illustrating aberration performance at a standard position of the zoom lens according to the second embodiment.
- FIG. 8 is a diagram illustrating the aberration performance at the telephoto end of the zoom lens according to the second embodiment.
- FIG. 9 is a diagram illustrating the aberration performance of the zoom lens according to the third embodiment at the wide-angle end.
- FIG. 10 is an aberration diagram at a standard position of the zoom lens according to the third embodiment.
- FIG. 10 is an aberration diagram at a standard position of the zoom lens according to the third embodiment.
- FIG. 11 is a diagram illustrating the aberration performance at the telephoto end of the zoom lens according to the third embodiment.
- FIG. 12 is a diagram illustrating the aberration performance at the wide-angle end of the zoom lens according to the fourth embodiment.
- FIG. 13 is an aberration diagram at a standard position of the zoom lens according to Example 4.
- FIG. 14 is a diagram illustrating the aberration performance at the telephoto end of the zoom lens according to the fourth embodiment.
- FIG. 15 is a diagram illustrating the aberration performance of the zoom lens according to the fifth embodiment at the wide-angle end.
- FIG. 16 is an aberration diagram at a standard position of the zoom lens according to Example 5.
- FIG. 17 is a diagram illustrating the aberration performance at the telephoto end of the zoom lens according to the fifth embodiment.
- FIG. 18 is a diagram illustrating aberration performance of the zoom lens according to the sixth embodiment at the wide-angle end.
- FIG. 19 is an aberration diagram at a standard position of the zoom lens according to Example 6.
- FIG. 20 is a diagram illustrating the aberration performance at the telephoto end of the zoom lens according to the sixth embodiment.
- FIG. 21 is a diagram illustrating the aberration performance at the wide-angle end of the zoom lens according to the seventh embodiment.
- FIG. 22 is a diagram illustrating aberration diagrams at a standard position of the zoom lens according to the seventh embodiment.
- FIG. 23 illustrates aberration performance at the telephoto end of the zoom lens according to the seventh embodiment.
- FIG. 24 is a diagram showing the aberration performance at the wide-angle end of the zoom lens according to Example 8.
- FIG. 25 is an aberration diagram at a standard position of the zoom lens according to Example 8.
- FIG. 26 is a diagram showing the aberration performance at the telephoto end of the zoom lens according to Example 8.
- FIG. 27 is a diagram illustrating the aberration performance at the wide-angle end of the zoom lens according to the ninth embodiment.
- FIG. 28 is an aberration diagram at a standard position of the zoom lens according to Example 9.
- FIG. 29 is a diagram illustrating the aberration performance at the telephoto end of the zoom lens according to Example 9;
- FIG. 30 is a diagram illustrating the aberration performance at the wide-angle end of the zoom lens according to Example 10.
- FIG. 31 is a diagram showing an aberration diagram at a standard position of the zoom lens according to Example 10.
- FIG. 32 is a diagram illustrating the aberration performance at the telephoto end of the zoom lens according to Example 10.
- FIG. 33 is a configuration diagram of a video camera using the zoom lens according to the first embodiment.
- FIG. 34 is a configuration diagram of an electronic still camera using the zoom lens according to the first embodiment.
- FIG. 35 is a configuration diagram of an example of a conventional zoom lens. (Embodiment 1)
- FIG. 1 is a configuration diagram of the zoom lens according to the first embodiment.
- the zoom lens shown in this figure has, in order from the object side, a first lens group 1 having a positive refractive power and fixed to the image plane 6, and a negative refractive power that moves on the optical axis.
- the second lens group 2 that exerts a zooming effect
- the third lens group 3 that has a positive refractive power and is fixed to the image plane, and performs the light-gathering action, and the movement of the second lens group 2 and the object that is the subject
- a fourth lens group having a positive refractive power that moves on the optical axis so as to keep the image plane, which fluctuates as the lens moves, at a fixed position from the reference plane.
- the first lens group 1 includes, in order from the object side, a lens 1 a having a negative refractive power, a lens 1 b having a positive refractive power, and a meniscus lens 1 c having a convex surface on the object side and having a positive refractive power. Have been.
- the second lens group 2 includes, in order from the object side, a lens 2 a having a negative refractive power, a biconcave lens 2 b, and a lens 2 c having a positive refractive power, and at least one surface of each lens is non- It is a spherical surface.
- the third lens group 3 includes, in order from the object side, a biconvex lens 3 a having a positive refractive power and both surfaces formed as aspherical surfaces, a lens 3 b having a positive refractive power with the convex surface facing the object side, And a lens 3c having a negative refractive power.
- the lens 3b having a positive refractive power and the lens 3c having a negative refractive power are joined to each other, and the positive refractive power of the biconvex lens 3a is equal to that of the joined lenses 3b and 3c. It is set to be relatively stronger than the refractive power corresponding to the composite focal length.
- the fourth lens unit 4 is composed of a single biconvex lens. Are formed on an aspheric surface.
- CL 1 is the effective diameter of the lens 1 a closest to the object side in the first lens group
- L is the distance from the lens 1 a closest to the object side in the first lens group of the zoom lens to the image plane
- the focal length of the fourth lens group Assuming that f 4 and the focal length at the wide-angle end as fw, the zoom lens of the present embodiment satisfies the following equations (1) to (3).
- Equation (1) 2.0 L / C L 1 2.3
- Equation (2) 0.2 ⁇ f 4 / L ⁇ 0.35
- Equation (3) 0. 3 ⁇ f w / f 4 0.4 0.4
- Equation (1) relates to the total length and the angle of view. If L / CL 1 falls below the lower limit, the first lens unit required to secure the effective diameter is required to satisfy the conditions of the focal length of the first lens group and the position of the rear principal point, which are necessary for the construction of a compact zoom lens. Since the thickness of the lens group is increased, it becomes difficult to sufficiently correct aberrations. For this reason, despite the fact that a sufficient angle of view can be ensured in a compact system, it is not possible to ensure sufficient aberration performance for the entire zoom lens system.
- the focal length and the position of the rear principal point required for the first lens group necessary for the construction of a compact zoom lens are determined in consideration of the Petzval sum in order to construct a compact zoom lens with respect to the focal length. It is necessary to determine according to the focal length of the second lens group, and for the position of the rear principal point, minimize the amount of movement of the second and fourth lens groups, and It is necessary to decide to make the closest distance between the two lens groups short enough o
- Equation (2) is an equation for the back focus and the angle of view.
- the shorter the zoom lens the shorter the focal length of the entire zoom lens system and the shorter the back focus.Thus, a sufficient angle of view can be secured, but a sufficient back focus cannot be obtained.
- the focal length of the fourth lens group becomes longer with respect to the rays that have been made almost afocal up to the third lens group, so that the back focus is also longer, and at the same time, the focal length of the entire zoom lens system is increased. Is not long enough.
- Equation (3) is an equation relating to the total lens length and the angle of view. If fw_f4 is below the lower limit, the focal length of the fourth lens group becomes longer than the focal length at the wide-angle end. Since the distance from the fourth lens group to the image forming plane becomes longer for rays that have been almost afocal up to, the back force is also longer, and the overall length is longer.
- the focal length of the fourth lens group becomes shorter with respect to the focal length at the wide-angle end, and the fourth lens group becomes substantially less focal point with respect to the third lens group. Since the distance from the lens group to the image plane is short, the back focus is also short, and the overall length of the zoom lens is short, but sufficient back focus cannot be obtained.
- Equation (4) 2.16 ⁇ L / C L 1
- Equation (5) 0.25 ⁇ f 4 / L ⁇ 0.30
- Equation (6) 0.313 ku f wZf 4 ku 0.376 (Embodiment 2)
- FIG. 2 is a configuration diagram of the zoom lens according to the second embodiment.
- the zoom lens shown in FIG. 2 has, in order from the object side, a first lens group 1 fixed to an image plane 6 having a positive refractive power, and moves back and forth on the optical axis having a negative refractive power.
- the second lens group 2 that exerts a zooming effect by performing the zooming operation
- the third lens group 3 that has a positive refractive power and is fixed to the image plane, and performs the light-gathering action, and the movement and the subject of the second lens group 2
- a fourth lens group having a positive refractive power that moves on the optical axis so as to keep the image plane that fluctuates with the movement of the object at a constant position from the reference plane is provided.
- a flat plate 5 equivalent to a face plate or the like of an optical low-pass filter is provided between the fourth lens group 4 and the imaging surface 6.
- the first lens group 1 includes, in order from the object side, a lens 1a having a negative refractive power, a lens 1b having a positive refractive power, and a meniscus lens 1c having a positive refractive power on the object side.
- the second lens group 2 includes, in order from the object side, a lens 2a having a negative refractive power, a biconcave lens 2b, and a lens 2c having a positive refractive power, and at least one surface of each of the lenses is aspheric. It is.
- the third lens group 3 includes, in order from the object side, a biconvex lens 3 a having a positive refractive power and both surfaces formed as aspherical surfaces, a lens 3 b having a positive refractive power with the convex surface facing the object side, and It is constituted by a lens 3c having a negative refractive power.
- the lens 3b having a positive refracting power and the lens 3c having a negative refracting power are arranged with a small air gap therebetween.
- the refractive power of the biconvex lens 3a is made relatively stronger than the combined refractive power of the lenses 3b and 3c. With such a configuration, sufficient back focus can be obtained, and sufficient aberration correction can be performed while being very compact.
- the fourth lens unit 4 is composed of a single biconvex lens, and the object side is It is formed on an aspheric surface.
- the effective diameter of the lens 1a closest to the object side of the first lens group is CL1
- the distance from the lens 1a closest to the object side of the first lens group of the zoom lens to the image plane is L
- the lens diameter of the fourth lens group is Assuming that the focal length is f 4 and the focal length at the wide-angle end is fw, the zoom lens according to the present embodiment satisfies the following equations (7) to (9).
- Equation (7) 1.8 ⁇ L / C L 1 ⁇ 2.3
- Equation (8) 0.2 ⁇ f 4 / L ⁇ 0.35
- Equation (9) 0.25 ⁇ f / f 4 ⁇ 0.4
- Equation (7) relates to the total length and the angle of view.
- LZCL1 falls below the lower limit
- the focal length of the first lens group and the position of the rear principal point necessary for the construction of a compact zoom lens are calculated.
- the thickness of the first lens group, which is necessary for securing the effective diameter is increased, and it becomes difficult to sufficiently correct aberration. For this reason, although a sufficient angle of view can be ensured by the compact, it is not possible to ensure sufficient aberration performance as the whole zoom lens system.
- the focal length and the position of the rear principal point required for the first lens group necessary to construct a compact zoom lens are as follows: For the focal length, a Petzval lens is required to construct a compact zoom lens. It is necessary to determine the focal length of the second lens group in consideration of the sum.For the position of the rear principal point, minimize the amount of movement of the second and fourth lens groups, and It is necessary to determine that the closest distance between the group and the second lens group should be sufficiently short.
- Equation (8) relates to the back focus and the angle of view.
- f4ZL falls below the lower limit
- the focal length of the fourth lens group is reduced for the almost afocal light beam up to the third lens group.
- the focal length of the entire zoom lens system becomes shorter and the back focus also becomes shorter, so that a sufficient angle of view can be secured, but sufficient back focus cannot be obtained.
- f4 / L exceeds the upper limit
- the focal length of the fourth lens group becomes longer for rays almost afocaled up to the third lens group, so that the back focus becomes longer.
- the focal length of the entire zoom lens system becomes long, so that a sufficiently wide angle of view cannot be obtained.
- Equation (9) relates to the total lens length and the angle of view. If fw / f4 falls below the lower limit, the focal length of the fourth lens group becomes longer than the focal length at the wide-angle end. The distance from the group to the image plane becomes longer, and the back focus becomes longer, resulting in a longer overall length.
- the focal length of the fourth lens group becomes shorter with respect to the focal length at the wide-angle end, and the fourth lens group becomes substantially less focal point with respect to the third lens group. Since the distance from the lens group to the image plane is short, the back focus is also short. For this reason, the overall length of the zoom lens is reduced, but sufficient back focus cannot be obtained.
- ranges of the formulas (7) to (9) are respectively ranges of the following formulas (10) to (12).
- Equation (10) 2.06 ⁇ L / C L 1 ⁇ 2.25
- Equation (11) 0.25 ⁇ f 4 / L ⁇ 0.30
- Equation (12) 0.299 ⁇ f w / f 4 ⁇ 0.376
- FIG. 33 is a configuration diagram of a video camera using the zoom lens of the present invention.
- the zoom lens 331 of the video camera shown in this figure is according to the first and second embodiments.
- the mouth-pass filter 332, the image sensor 333, the microphone 334, the signal processing circuit 335 , A viewfinder 336, an audio monitor 337, and a recording system 338 Further, additional functions can be added.
- FIG. 34 is a configuration diagram of an electronic still camera using the zoom lens of the present invention.
- the zoom lens 341 of the electronic still camera shown in this figure is according to the first and second embodiments, and further includes a single-pass filter 342, an imaging device 343, a signal processing circuit 344, a liquid crystal monitor 345, and a recording device. It is basically composed of system 346.
- the recording system 346 also has a function of recording shooting conditions and the like in addition to the subject video. In addition, additional functions can be added.
- Examples 1 to 5 are examples according to the first embodiment.
- Example 1 In Example 1,
- Table 1 shows specific numerical values of the first embodiment.
- r is the radius of curvature of the lens (mm)
- d is the thickness of the lens (mm) or the air gap between the lenses (mm)
- n is the refractive index of each lens with respect to the d line
- the Abbe number for the d-line of the lens and CL 1 indicate the effective diameter (diameter) (mm) (Tables 4, 7, 10, 13, 16, 16, 19, 22, 25, and 28 below) The same applies.)
- the effective diameter is defined as the distance from the front of the lens 1a closest to the object side of this zoom lens to the object, between 1 m and ⁇ . All rays reaching the guaranteed image height at all zoom positions are at the aperture position and are set to be on both sides of the aperture center. However, in this data, only the part related to determining the effective diameter of the lens 1a closest to the object is displayed.
- the aspheric shape is defined by the following equation (A). The same applies to the following Example 20.
- Z is the distance of the point on the aspheric surface at the height Y from the optical axis from the aspherical vertex
- ⁇ is the height from the optical axis
- K is the conic constant
- D is the conic constant
- E and F are the aspheric coefficients.
- the eighth, eleventh, twelfth, and sixteenth surfaces are aspherical surfaces, and the aspherical surface coefficients are shown in Table 2 below.
- Table 3 shows an example of the air spacing that can be changed by zooming.
- the values shown in Table 3 are the values at the base of the object point.
- the standard position is the zoom position at which the magnification of the second lens group 2 is 1
- f, FZNO and ⁇ are the focal length at the wide-angle end, the standard position, the telephoto end, the F-number and the incident light, respectively.
- the angle of view is half.
- the description of Table 3 is the same for Tables 6, 9, 12, 15, 18, 18, 21, 24, 27, and 30 below.
- FIG. 3 to 5 show the aberration performance of the aspherical zoom lens according to Example 1 shown in Table 1 above.
- (a) is a diagram of the spherical aberration
- the solid line shows the value for the d-line
- the dotted line shows the sine condition.
- (B) is a diagram of astigmatism.
- the solid line indicates sagittal curvature of field
- the dotted line indicates the sum of curvature of the field image.
- (c) is a diagram showing distortion
- (d) is a diagram of axial aberration.
- the solid line shows the value for the d line
- the dotted line shows the value for the F line
- the broken line shows the value for the C line.
- (E) is a diagram of the chromatic aberration of magnification.
- the dotted line shows the value for the F line, and the broken line shows the value for the C line.
- the description of (a) to (e) is the same for FIGS. 6 to 32 below.
- the eighth, eleventh, twelveth, and sixteenth surfaces are aspherical surfaces, and the aspherical surface coefficients are shown in Table 5 below.
- the eighth, eleventh, twelveth, and sixteenth surfaces are aspherical surfaces, and the aspherical surface coefficients are shown in Table 8 below.
- the eighth, eleventh, twelveth, and sixteenth surfaces are aspherical surfaces, and the aspherical surface coefficients are shown in Table 11 below.
- the eighth, eleventh, twelfth, and sixteenth surfaces are aspheric surfaces, and the aspheric surface coefficients are shown in Table 14 below.
- Examples 6 to 10 are examples according to the second embodiment.
- Example 6
- the eighth, eleventh, twelfth and sixteenth surfaces are aspherical surfaces, and the aspherical surface coefficients are shown in Table 17 below.
- the eighth, eleventh, twelveth, and seventeenth surfaces are aspherical surfaces, and the aspherical surface coefficients are shown in Table 20 below.
- 21 to 23 show the aberration performance of the aspherical zoom lens according to Example 7 shown in Table 19. From these figures, it can be seen that the zoom lens according to Example 7 has good optical performance.
- the eighth, eleventh, eleventh, and seventeenth surfaces are aspherical, and the aspherical surface coefficients are shown in Table 23.
- the aspheric shape is defined by the above equation (26).
- the eighth, eleventh, eleventh, and twenty-first surfaces are aspherical surfaces, and the aspherical surface coefficients are shown in Table 26 below.
- the eighth, eleventh, twelfth and seventeenth surfaces are aspherical surfaces, and the aspherical surface coefficients are shown in Table 29 below.
- a compact wide-angle zoom lens having a small number of lenses of 10 and a zoom ratio of about 10 times and an angle of view of about 60 ° or more can be realized. .
- the zoom lens of the present invention since the zoom lens of the present invention is used, a compact, lightweight and high-performance video camera can be realized. Further, according to the electronic still camera of the present invention, since the zoom lens of the present invention is used, a compact, lightweight and high-performance electronic still camera can be realized.
- a compact wide-angle zoom lens having a small number of lenses of 10 and a zoom ratio of about 10 times and an angle of view of about 60 ° or more can be realized. Therefore, it can be used as a zoom lens for video cameras and electronic still cameras.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99900177A EP1054281B1 (en) | 1998-01-14 | 1999-01-12 | Zoom lens and video camera and electronic still camera using this |
DE69936508T DE69936508D1 (de) | 1998-01-14 | 1999-01-12 | Zoom-linse, video-kamera und ihre verwendung in elektronischer kamera |
US09/582,915 US6441968B1 (en) | 1998-01-14 | 1999-01-12 | Zoom lens and video camera and electronic still camera using this |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP00588998A JP3476668B2 (ja) | 1998-01-14 | 1998-01-14 | ズームレンズ及びこれを用いたビデオカメラと電子スチルカメラ |
JP10/5889 | 1998-01-14 |
Publications (1)
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WO1999036821A1 true WO1999036821A1 (fr) | 1999-07-22 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP1999/000088 WO1999036821A1 (fr) | 1998-01-14 | 1999-01-12 | Objectif zoom, et camera video et appareil photographique electronique comportant ledit objectif |
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Country | Link |
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US (1) | US6441968B1 (ja) |
EP (1) | EP1054281B1 (ja) |
JP (1) | JP3476668B2 (ja) |
DE (1) | DE69936508D1 (ja) |
WO (1) | WO1999036821A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2001027677A1 (fr) * | 1999-10-14 | 2001-04-19 | Matsushita Electric Industrial Co., Ltd. | Objectif zoom et camera video le comprenant |
JP4245780B2 (ja) | 2000-06-12 | 2009-04-02 | オリンパス株式会社 | ズーム撮像光学系 |
JP4548766B2 (ja) * | 2003-11-14 | 2010-09-22 | 株式会社リコー | ズームレンズ、レンズユニット、カメラおよび携帯情報端末装置 |
JP4695912B2 (ja) | 2005-04-11 | 2011-06-08 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
JP4750458B2 (ja) * | 2005-04-19 | 2011-08-17 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
JP4876755B2 (ja) * | 2006-07-27 | 2012-02-15 | 株式会社ニコン | 高変倍ズームレンズと、これを有する光学機器 |
CN109477967A (zh) * | 2016-05-11 | 2019-03-15 | 威瑞股份公司 | 具可变焦平面的抬头显示*** |
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JPH06308388A (ja) * | 1993-04-26 | 1994-11-04 | Canon Inc | リアーフォーカス式ズームレンズ |
JPH08160299A (ja) * | 1994-12-12 | 1996-06-21 | Olympus Optical Co Ltd | ズームレンズ |
JPH08160300A (ja) * | 1994-12-12 | 1996-06-21 | Olympus Optical Co Ltd | ズームレンズ |
JPH09281392A (ja) * | 1996-04-10 | 1997-10-31 | Matsushita Electric Ind Co Ltd | ズームレンズ |
JPH09288236A (ja) * | 1996-04-19 | 1997-11-04 | Copal Co Ltd | リアフォーカス式ズームレンズ |
JPH10260355A (ja) * | 1997-03-18 | 1998-09-29 | Canon Inc | 防振機能を有した変倍光学系 |
JPH1152241A (ja) * | 1997-08-07 | 1999-02-26 | Matsushita Electric Ind Co Ltd | ズームレンズ及びこれを用いたビデオカメラと電子スチルカメラ |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6226130B1 (en) * | 1996-04-09 | 2001-05-01 | Canon Kabushiki Kaisha | Zoom lens |
-
1998
- 1998-01-14 JP JP00588998A patent/JP3476668B2/ja not_active Expired - Fee Related
-
1999
- 1999-01-12 US US09/582,915 patent/US6441968B1/en not_active Expired - Fee Related
- 1999-01-12 EP EP99900177A patent/EP1054281B1/en not_active Expired - Lifetime
- 1999-01-12 DE DE69936508T patent/DE69936508D1/de not_active Expired - Lifetime
- 1999-01-12 WO PCT/JP1999/000088 patent/WO1999036821A1/ja active IP Right Grant
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0255308A (ja) * | 1988-08-22 | 1990-02-23 | Matsushita Electric Ind Co Ltd | ズームレンズ |
JPH0328814A (ja) * | 1989-06-26 | 1991-02-07 | Matsushita Electric Ind Co Ltd | ズームレンズ |
JPH045609A (ja) * | 1990-04-23 | 1992-01-09 | Matsushita Electric Ind Co Ltd | ズームレンズとそれを用いた画像形成光学装置 |
JPH0488309A (ja) * | 1990-07-31 | 1992-03-23 | Canon Inc | リヤーフォーカス式のズームレンズ |
JPH04104114A (ja) * | 1990-08-24 | 1992-04-06 | Olympus Optical Co Ltd | 全長の短い変倍レンズ |
JPH04153615A (ja) * | 1990-10-18 | 1992-05-27 | Olympus Optical Co Ltd | 全長の短い変倍レンズ |
JPH0527167A (ja) * | 1991-07-24 | 1993-02-05 | Olympus Optical Co Ltd | ズームレンズ |
JPH05134178A (ja) * | 1991-11-13 | 1993-05-28 | Olympus Optical Co Ltd | ズームレンズ |
JPH06308388A (ja) * | 1993-04-26 | 1994-11-04 | Canon Inc | リアーフォーカス式ズームレンズ |
JPH08160299A (ja) * | 1994-12-12 | 1996-06-21 | Olympus Optical Co Ltd | ズームレンズ |
JPH08160300A (ja) * | 1994-12-12 | 1996-06-21 | Olympus Optical Co Ltd | ズームレンズ |
JPH09281392A (ja) * | 1996-04-10 | 1997-10-31 | Matsushita Electric Ind Co Ltd | ズームレンズ |
JPH09288236A (ja) * | 1996-04-19 | 1997-11-04 | Copal Co Ltd | リアフォーカス式ズームレンズ |
JPH10260355A (ja) * | 1997-03-18 | 1998-09-29 | Canon Inc | 防振機能を有した変倍光学系 |
JPH1152241A (ja) * | 1997-08-07 | 1999-02-26 | Matsushita Electric Ind Co Ltd | ズームレンズ及びこれを用いたビデオカメラと電子スチルカメラ |
Non-Patent Citations (1)
Title |
---|
See also references of EP1054281A4 * |
Also Published As
Publication number | Publication date |
---|---|
JPH11202198A (ja) | 1999-07-30 |
US6441968B1 (en) | 2002-08-27 |
EP1054281A4 (en) | 2005-04-27 |
EP1054281B1 (en) | 2007-07-11 |
JP3476668B2 (ja) | 2003-12-10 |
EP1054281A1 (en) | 2000-11-22 |
DE69936508D1 (de) | 2007-08-23 |
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