WO2004010199A3 - Zoom lens system - Google Patents

Zoom lens system Download PDF

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Publication number
WO2004010199A3
WO2004010199A3 PCT/US2003/022418 US0322418W WO2004010199A3 WO 2004010199 A3 WO2004010199 A3 WO 2004010199A3 US 0322418 W US0322418 W US 0322418W WO 2004010199 A3 WO2004010199 A3 WO 2004010199A3
Authority
WO
WIPO (PCT)
Prior art keywords
zoom lens
zoom
recited
motion
focal length
Prior art date
Application number
PCT/US2003/022418
Other languages
French (fr)
Other versions
WO2004010199B1 (en
WO2004010199A2 (en
Inventor
Ellis I Betensky
James Brian Caldwell
Iain A Neil
Takanori Yamanashi
Original Assignee
Panavision Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panavision Inc filed Critical Panavision Inc
Priority to DE60308191T priority Critical patent/DE60308191T2/en
Priority to AU2003252012A priority patent/AU2003252012B2/en
Priority to CA002490012A priority patent/CA2490012C/en
Priority to EP03765693A priority patent/EP1523691B1/en
Priority to JP2004523536A priority patent/JP2006512595A/en
Publication of WO2004010199A2 publication Critical patent/WO2004010199A2/en
Publication of WO2004010199A3 publication Critical patent/WO2004010199A3/en
Publication of WO2004010199B1 publication Critical patent/WO2004010199B1/en

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/02Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
    • G02B15/10Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment
    • G02B15/12Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment by adding telescopic attachments
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/14Optical 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
    • G02B15/142Optical 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 two groups only
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/14Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation

Abstract

A zoom lens system is disclosed. The zoom lens system forms a final image of an object and a first intermediate real image between the object and the final image. The zoom lens system includes a first optical unit located between the object and the first intermediate real image. The first optical unit comprises at least one optical subunit which is moved to change the size (magnification) of the first intermediate real image. The zoom lens system also includes a second optical unit located between the first intermediate real image and the final image, at least a portion of which is moved to change the size (magnification) of the final image. The zoom lens system provides a wide zoom range of focal lengths with continuous zooming between the focal lengths and optional image stabilization.

Claims

<Desc/Clms Page number 1>
AMENDED CLAIMS [Received by the International Bureau on 16 April 2004 (16.04. 04) ] 1. A oom lens system for forming a final image of an object, said system having all object side and an image side and forming a first intermediate real image between the object and the final image, said system comprising in order from the object side to the image side : a first optical unit including at least two lens elements and located between the object and the first intermediate real image, said unit comprising at least one optical subunit which is moved to change the size (magnification) of the first intermediate real image ;
and a second optical unit including at least two lens clements and located between the first intermediate real image and the final image, at least a portion of which is moved to change the size (magnification) of the final image ; wherein the zoom lens system has a zoom ratio of at least 10 to 1.
2. The zoom lens system as recited in claim 1, the second optical unit comprising at least one optical subunit, and at least one of the optical subunits is movable to hold an axial position of the final image substantially stationary as the focal length of the system is changed.
3. The zoom lens system as recited in claim 1, wherein the second optical unit comprises at least one optical subunit and at least one of the optical subunits in each of the first and second optical units moves continuously as the focal length of the system is changed.
4. The zoom lens system as recited in claim 1, wh'ein the second optical unit comprises at least one optical subunit and at least one of the optical subunits in one of the first and second optical units is at least temporarily stationary while at least one of the optical subunits in the other of the first and second optical units moves as the focal length of the system is changed. <Desc/Clms Page number 2>
5. The zoom lens system as recited in claim), wherein : (a) the second optical unit comprises at least one optical subunit ; and (b) a change in the focal length of the system includes at least one first motion and at least one second motion wherein ; (i) the first motion can precede or follow the second motion ; (ii) for the first motion, at least one optical subunit of the first optical unit moves without movement of any optical subunit of the second optical unit ; and (iii) for the second motion, at least one optical subunit of the second optical unit moves without movement of any optical subunit of the first optical unit.
6. The zoom lens system as recited in claim 5, wherein a change in the focal length of the system includes only a single first motionand a single second motion.
7. The zoom lens system as recited in claim 1, further comprising a focus unit on the object side of the first optical unit for focusing at least one of the intermediate and final images.
8. The zoom lens system as recited in claim 1 iereinthe first optical tUlit comprises an aperture stop and the system further comprises, t pupil imaging unit located between the first and second optical units for imaging an exit pupil of the first optical unit to form an entrance pupil of the second optical urit.
9. The zoom lens system as recited in claim 1 wherein the second optical unit comprises an aperture stop and the system further comprises a pupil imaging unit located between the first and second optical units for imaging an entrance pupil of the second optical unit to form an exit pupil of the first optical unit.
10. The zoom lens system as recited in claim I, further comprising an image stabilization unit on the image side of the second optical unit for stabilizing the final image. <Desc/Clms Page number 3>
11. The zoom lens system as recited in claim 7, the focus unit comprising two optical subunits that are movable along the optical axis of the zoom lens system.
12. The zoom lens system as recited in claim 11, wherein the optical axis is straight.
13. The zoom lens system as recited in claim 7, the focus unit comprising seven or fewer lens elements.
14. The zoom lens system as recited in claim 10, the image stabilization unit comprising at least one lens element that is laterally movable off 1he optical axis of the zoom lenS system.
15. The zoom lens system as recited in claim 10, the image stabilization unit comprising at least one lens element mat is axially movable along the optical axis of the zoom lens system.
16. The zoom lens sysiem as recited in claim 10, the image stabilization unit comprising at least one laterally movable lens element that is laterally movable off the optical axis of me zoom lens system and at least one axially movable lens element that is axially movable along the optical axis, the at least one laterally movable lens element separated from the at least one axially movable lens clement by an air gap, wherein radiation from the object and passing through the air gap is substantially collimated.
17. The zoom lens system as recited in claim 14, wherein radiation from the object and passing through the system is substantially collimated at the at least one laterally movable lens element.
18. The zoom lens system as recited in claim 15, wherein radiation from the object and passing through the system is substantially collimated at the at least one axially movable lens element.
19. The zoom lens system as recited in claim 1, wherein one or more additional intermediate real images are formed between the object and the final image. <Desc/Clms Page number 4>
20. The zoom lens system as recited in claim 19, Curther comprising one or more additional optical units for changing the size (magnification) of the one or more additional intermediate real images.
21. The zoom lens system as recited in claim 1, wherein the first intermediate real image is formed in an air space between optical elements in the zoom lens system and remains in the air space during zooming.
22. The zoom lens system as recited in claim 19, wherein the one or more additional intermediate real images are formed in one or mote air spaces between optical elements in the zoom lens system and remain in the one or more air spaces during zooming.
23. The zoom lens system ofcjaim 1 wherein the system comprises at least one aspheric optical surface.
24. The zoom lens system of claim 1 wherein the system comprises at least one diffractive optical surface.
25. The zoorn lens system of claim 1 wherein the system comprises at least one aspheric optical surface and at least one diffractive optical surface.
26. A zoom lens system for forming a final image of an object, said system forming a first intermediate real image between the object and the final image, said system comprisi1g compounded first and second zOOIll lenses wherein the compounded first and second zoom lenses have controlled pupil imaging with respect to one another and wherein the zoom lens system has a zoom ratio of at least 10 to 1.
27. The zoom lens system as recited in claim 26, wherein at least a portion of each of the first and second zoom lenses moves continuously as the focal length of the system is changed. <Desc/Clms Page number 5>
28. The zoom lens system as recited in claim 26, wherein at least a portion of one of the first and second zoom lenses is at least temporanly stationary while at least a portion of the other of the first and second zoom lenses moves as the focal length of the system is changed.
29. The zoom lens system as recited in claim 26, wherein a change in the focal length of the system includes at least one first motion md at least one second motion wherein : (a) the first motion can precede or follow the second motion ; (b) for the first motion, only the first zoom lens changes the focal length of the system ; and (c) for the second motion, only the second zoom lens changes the focal length of the system 30. The zoom lens system as recited in claim 29, wherein a change in the focal length of the system includes only a single first motion and a single second motion.
31. A zoom lens system for forming a final image of an object, said system having an object side and an image side and comprising in order from the object side to the image side : a zoom lens that forms an intermediate real image; and a variable focal length relay system that receives the intermediate real image and changes its magnification to form the final image ; wherein the zoom lens system has a zoom rat-o of at least 10 to 1.
32. The zoom lens system as recited in claim 31, wherein at least a portion of each of the zoom lens and me relay system moves continuously as the focal length of the system is changed. <Desc/Clms Page number 6>
33. The zoom lens system as recited in claim 31, wherein at least a portion of one of the zoom lens a. nd the relay system is at least temporarily stationary while at least a portion of the other of the zoom lens and the relay system moves as the focal length of the system is changed.
34. The zoom lens system as recited iu claim 31, wherein a change in the focal length of the system includes at least one first motion and at least one second motion wherein: (a) the first motion can precede or follow the second motion ; (b) for the first motion, only the zoom lens changes the focal length of the system ; and (c) for the second motion, only the relay system changes the focal length of the system.
35. The zoom lens system as recited in claim 34, wherein a change in the focal length of the system includes only a single first motion and a single second motion.
36. A zoom lens system for forming a final image of an object, the zoom lens system having a range of focal lengths between a maximum focal length and a minimum focal length and forming at least a first iniermediaLe real image between the object and the final image for all f focal lengths within the range of focal lengths, the zoom lens system having an object side and an image side and comprising in order from the object side to the image side : a first lens unit having a focal length that is changed to change the size (magnification) of the first intermediate real image, the first lens unit being located between the object and the first intermediate real image ;
and a second lens unit for changing the size (magnification) of the final image, the second lens unit being located between the first intermediate rea) image and the final image ; wherein the zoom lens system has a zoom ratio of at least 10 to 1. <Desc/Clms Page number 7>
37. The zoom lens system as recited in claim 36, wherein at least a portion of each of the first and second lens units moves continuously as the focal length of the system is changed.
38. The zoom lens system as recited in claim 36, wherein at least a portion of one of the first and second lens units is at least temporarily stationary while at least a portion of the other of the first and second lens units moves as the focal length of the system is changed.
39. The zoom lens system as recited in claim 36, wherein a change in me focal length of the system includes at least one first motion and at least one second motion wherein : (a) the first motion can precede or follow the second motion ; (b) for the frst motiorla ollly the frst lens unit changes the focal length of the system ; and (c) for the second motion, only the second ! en$ unit changes the focal length of the system.
40. The zoom lens system as recited in claim 39, wherein a change in the focal length of the system includes only a single first motion and a single second motion.
41-A zoom lens system having an object side and an image side and comprising in order from the object side to the image side : a variable focal length lens unit that forms an intermediate real image of an object ; and a variable focal length lens unit that forms a teal image of the intermediate real image ; wherein the zoom lens system has a zoom ratio of at least 10 to 1.
42. The zoom lens system as recited in claim 41, wherein at least a portion of each of the variable focal length lens units moves continuously as the focal length of the system is changed. <Desc/Clms Page number 8>
43. The zoom lens system as recited in claim 41, wherein at least a portion of one of one of the variable focal length lens units is at least tempol-ari Iy stationary while at least a portion of the other of the variable focal length lens units moves as the focal length of the system is changed.
44. The zoom lens system as recited ill claim 41, wherein a change in the focal length of the system includes at least one first motion and at least one second motion wherein : (a) the first motion can precede or follow the second motion ; (b) for the first motion, only the variable focal length lens unit that forms the intermediate real image changes the focal length of the system; and (c) for the second motion, only the variable focal length lens unit that forms a rcal image of the intermediate real image changes the focal length of the system.
45. The zoom lens system as recited in claim 44, wherein a change in the focal length of the system includes only a single first motion. and a single second motion.
46. A compound zoom lens system for collecting radiation from an object and delivering the radiation to a sensor, said system comprising multiple zoom lens portions including a first zoom lens portion nearest to the object for forming an intermediate image of the object and a last zoom lens portion nearest to the sensor for delivering radiation from the intermediate image to the sensor wherein the compound zoom lens system has a zoom ratio of at least 10 to 1.
47. The compound zoom lens system as recited in claim 46, wherein at least a portion of each of the first and last 7, ooin lens portions moves continuously as the focal length of the system is changed.
48. The compound zoom lens system as recited in claim 46, wherein at least a portion of one of the first and last zoom lens portions is at least temporarily stationary while at least a portion of the other of the first and last zoom lens portions moves as the focal length of the system is changed. <Desc/Clms Page number 9>
49. The compound zoom lens system as recited in claim 46, wherein a change in the focal length of the system includes at least one Jlrst motion and at least one second motion wherein : (a) the first motion can precede or follow the second motion ; (b) for the first motion, only the first zoom lens portion changes the focal length of the system, and (c) for the second motion, only the last zocm lens portion changes the focal length of the system.
50. The compound zoom lens system as recited in claim 49, wherein a change in the focal length of the system includes only a single first motion and a single second motion.
51. The compound zoom lens system as recited in claim 46 wherein the multiple zoom lens portions include only the first zoom lens portion and the last zoom lens portion.
52. A zoom lens system for forming a final image of an object, said system having a variable focal length, an optical axis, an aperture stop, and a chief ray that crosses the optical axis at the aperture stop, said system comprising : two lens units for changing the focal length of the system and for forming the final image, one of the units having a variable focal length and the other unit having at least a portion that is moveable ; wherein the chief ray crosses the optical axis at least one other location besides said aperture stop for all focal lengths of the system ; wherein the system forms an intermediate real image that is located between the two lens units for all focal lengths of the system ; and wherein the zoom lens system has a zoom ratio of at least 10 to 1.
53 The zoom lens system as recited in claim 52, therein the optical axis is straight. <Desc/Clms Page number 10>
54. The zoom lens system as recited in claim 52, wherein the system has a lens surface closest to the object and the at least one other location at which the chief ray crosses the optical axis is between said lens surface and the final image for all focal lengths of the system.
55. The zoom lens system as recited in claim 52, wherein at least a portion of each of the two lens units moves continuously as the focal length of the system is changed.
56. The zoom lens system as recited in claim 52, wherein at least a portion of one of the two lens units is at least temporarily stationary while at least a portion of the other of the two lens units moves as the focal length ofthn system is changed.
57. The zoom lens system as recited in claim 52, wherein a change in the focal length of the system includes at least one first motion and at least one second motion wherein : (a) the first motion can precede or follow 1 he second motion ; (b) for the first motion, only the lens unit having a variable focal length changes the focal length of the system : ; and (e) for the second motion, only the lens unit having at least a portion that is moveable changes the focal length of the system.
58. The zoom lens system as recited in claim 57, wherein the change in the focal length of the system includes only a single first motion and a single second motion.
59. A zoom lens system comprising : a zoom kernel for forming an intermediate real image ; and a zoom relay for magnifying the intermediate real image to form a final image ; wherein the zoom lens system has a zoom ratio of at least 10 to 1. <Desc/Clms Page number 11>
60. The zoom lens system as recited in claim 59, wherein at least a person of each of the zoom kernel and the zoom relay moves continuously as the focal length of the system is changed.
61. The zoom lens system as recited in claim 59, wherein at least a portion of one of the zoom kernel and the zoom relay is at least temporarily stationary while at least a portion of the other of the zoom kernel and the zoom relay moves as the focal length of the system is changed.
62. The zoom lens system as recited in claim 59, wherein a change in the focal length of the system includes at least one first motion and at least one second motion wherein : (a) the first motion can precede or follow the second motion ; (b) for the Crst motion, only the zoom kernel changes the focal length of the system ; and (c) for the second motion, only the zoom relay changes the focal length of the system.
63. The zoom lens system as recited in claim 62, wherein a change in the focal length of the system includes only a single first motion and a single second motion.
64. The zoom lens system as recited in claim 59, the zoom kernel comprising a zoom lens having a+-++ construction.
65. The zoom lens system as recited in claim 59, the zoom kernel comprising a zoom lens having a +--+ construction.
66. The oom lens system as recited in claim 59, the zoom kerne ! comprising a zoom lens having a-+ construction.
67. The zoom lens system as recited in claim 59, the zoom kernel comprising a zoom lens having a--I--+ construction. <Desc/Clms Page number 12>
68, The zoom lens system as recited in claim 39, the zoom kernel comprising a zoom lens having a-+-+ construction.
69. The zoom lens system as recited in claim 59, the zoom relay comprising a zoom lens having a +-+ + construction.
70. The zoom lens system as recited in claim 59, the zoom relay comprising a zoom lens having a +-+ construction.
71. The zoom lens system as recited in claim 59, the zoom relay comprising a zoom lens having a-+ construction.
72. The zoom lens system as recited in claim 59, the zoom kernel comprising a first lens unit for focusing at least one of the intermediate and final images.
73. The zoom lens system as recited in claim 72, wherein internal motions within the first lens unit are used to contribute to the correction of focus breathing.
74 The zoom lens system as recited in claim 59, wherein the system comprises one or more lens elements each with at least one asphcric surface for contributing to the correction of at least one of distortion and spherical aberration- 75. The zoom lens system as recited in claim 59, wherein the system comprises one or more fluor crown glass or calcium fluoride le ; ns elements for contributing to the correction of color aberrations.
76. The zoom lens system as recited in claim 59, wherein the system comprises one or more lens elements having a dif. fractive surface ior contributing to the correction of color aberrations.
77. A zoom lens system having a first lens unit that forms a real intermediate image and a second lens unit that forms a second ixuagc of the real intermediate image, said zoom lens system having a zoom ratio of at least 120 to 1. <Desc/Clms Page number 13>
78. The zoom lens system as recited in claim 77 wherein the zoom ratio is at least 200 to 1. <Desc/Clms Page number 14>
STATEMENT UNDER ARTICLE I 51 (l) The above amendments to the claims are being submitted in accordance with the Patent Cooperation Treaty Article 19. Claims 1,26, 31, 36, 41, 46,52 and 59 have been amended.
The object of the invention is to provide a zoom lens system that overcomes the problems and inefficiencies of prior zoom lens systems having large zoom ratios. (Page 3, lines 28-30 of the specification.) However, the invention is not limited to ultra-high zoom ratios (i. c. higher than 100 : 1) as stated in the International Search Report (ISR), and is equally applicable to conventional zoom ratios. (Page 4, lines 11-14). The present invention allows for zoom ratios that range from the conventional all the way up to 300 : 1 or more, by providing a first optical unit, a second optical unit and an intermediate image located between the object and the final image.
The two optical units and the intermediate image provide the present invention with the ability to achieve a wide range of zoom ratios not previously achievable. All of the claims recite these elements (not just claims 1-76 as stated in the ISR), and thus all of the claims cover a zoom lens system capable of achieving conventional to ultra-high zoom ratios.
Nevertheless, claims 1, 26, 31, 36, 41, 46, 52 and 59 have befell amended to recite zoom . ratios of at least 10 to I to make clear the range of zoom ratios available with the claimed invention and to distinguish the claimed invention from conventional zoom lens systems.
These amendments do not go beyond the disclosure of the international application as filed, and entry of these amendments is respectfully requested.
In addition, because all of the claims recite a zoom lens system comprised of first and second zoom elements and an intermediate image located between l object and the final image, there is a unity of invention and all claims should have been searched. The claims, although worded differently, fall within the same category and have effectively the samc scope.
Although the number of claims may be higher than usual, the claims are needed to obtain full protection for the invention in all countries in which protection is sought.
PCT/US2003/022418 2002-07-22 2003-07-18 Zoom lens system WO2004010199A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE60308191T DE60308191T2 (en) 2002-07-22 2003-07-18 ZOOM WITH ULTRA-HIGH MAGNIFICATION RATIO
AU2003252012A AU2003252012B2 (en) 2002-07-22 2003-07-18 Zoom lens system
CA002490012A CA2490012C (en) 2002-07-22 2003-07-18 Zoom lens system
EP03765693A EP1523691B1 (en) 2002-07-22 2003-07-18 Zoom lens system with ultra high zoom ratio
JP2004523536A JP2006512595A (en) 2002-07-22 2003-07-18 Zoom lens system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39788202P 2002-07-22 2002-07-22
US60/397,882 2002-07-22

Publications (3)

Publication Number Publication Date
WO2004010199A2 WO2004010199A2 (en) 2004-01-29
WO2004010199A3 true WO2004010199A3 (en) 2004-03-25
WO2004010199B1 WO2004010199B1 (en) 2004-05-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/022418 WO2004010199A2 (en) 2002-07-22 2003-07-18 Zoom lens system

Country Status (9)

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US (2) US6961188B2 (en)
EP (1) EP1523691B1 (en)
JP (1) JP2006512595A (en)
AT (1) ATE338961T1 (en)
AU (1) AU2003252012B2 (en)
CA (1) CA2490012C (en)
DE (1) DE60308191T2 (en)
TW (1) TWI263797B (en)
WO (1) WO2004010199A2 (en)

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US6961188B2 (en) 2005-11-01
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WO2004010199B1 (en) 2004-05-27
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JP2006512595A (en) 2006-04-13
US20040021953A1 (en) 2004-02-05
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WO2004010199A2 (en) 2004-01-29
US7012759B2 (en) 2006-03-14

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