Patent EP0123563A2 successfully refreshed from Google Patents.
Patent US5315435A successfully refreshed from Google Patents.
US5315435A
Expired / Lapsed
US
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Image stabilizing optical system
Assignee: Canon Inc
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Filing: 1991-05-15
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Granted: 1994-05-24
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Expires: 2011-05-15
Abstract
Abstract This specification discloses an image stabilizing photo-taking lens system having a lens system in which a plurality of lens units are disposed and at least one lens spacing is changed to change the focal length, and a variable vertical angle prism unit whose vertical angle is changed and driven to refract the optic axis immediately rearwardly of a predetermined lens surface which satisfies the condition that |Fa|<10 Ft, where Fa is the combined focal length from the front lens surface of the lens system to the predetermined lens surface, and Ft is the focal length of the entire lens system at the telephoto end thereof.
Inventors
- 👤 Akihisa Horiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:36
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/64; G02B27/646; G02B5/00; G02B5/04; G02B5/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
An optical apparatus for stabilizing an image, comprising: an objective lens having a plurality of lens units, the spacing of at least one of said lens units being changed to effect zooming; and an optical unit whose vertical angle can be changed to refract light from said objective lens, a transparent and flexible material being sealed in said optical unit, said optical unit being disposed immediately following a predetermined lens surface which satisfies a condition |Fa|<10 Ft, where Fa is the combined effective focal length from the front lens surface of said objective lens to said predetermined lens surface, and Ft is the focal length of said objective lens at the telephoto end thereof.
Claim 2
Dependent Claim
114 words
An optical apparatus for stabilizing an image, comprising: an objective lens having a plurality of lens units, the spacing of at least one of said lens units being changed to effect zooming; and an optical unit whose vertical angle can be changed to refract light from said objective lens, a transparent and flexible material being sealed in said optical unit, said optical unit being disposed immediately following a predetermined lens surface which satisfies a condition |Fa|<10 Ft, where Fa is the combined effective focal length from the front lens surface of said objective lens to said predetermined lens surface, and Ft is the focal length of said objective lens at the telephoto end thereof.
Claim 3
Dependent Claim
37 words
An optical apparatus according to claim 1, wherein at least two of said lens units move along the optic axis to effect zooming, and said optical unit is located rearwardly of said at least two lens units.
Claim 4
Dependent Claim
23 words
An optical apparatus according to claim 2, wherein said optical unit is located rearwardly of the last lens surface of said objective lens.
Claim 5
Dependent Claim
82 words
An optical apparatus for stabilizing an image, comprising: an objective lens having a total focal length at the telephoto end Ft; and an optical unit located immediately behind a lens portion of said objective lens, a transparent and flexible material being sealed in said optical unit, said lens portion having a variable focal length Fa, said optical unit transmitting and refracting a light beam for stabilizing the image of said objective lens; wherein said optical apparatus satisfies a condition that: |Fa|<10 Ft.
Claim 6
Dependent Claim
82 words
An optical apparatus for stabilizing an image, comprising: an objective lens having a total focal length at the telephoto end Ft; and an optical unit located immediately behind a lens portion of said objective lens, a transparent and flexible material being sealed in said optical unit, said lens portion having a variable focal length Fa, said optical unit transmitting and refracting a light beam for stabilizing the image of said objective lens; wherein said optical apparatus satisfies a condition that: |Fa|<10 Ft.
Claim 7
Dependent Claim
17 words
An optical apparatus according to claim 4, wherein said optical unit is a variable angle prism unit.
Claim 8
Dependent Claim
29 words
An optical apparatus according to claim 4, wherein said objective lens is a zoom lens and said optical unit moves in synchronism with zooming operation of said zoom lens.
Claim 9
Dependent Claim
24 words
An optical apparatus according to claim 1, wherein said objective lens includes an aperture and said optical unit is located adjacent to said aperture.
Claim 10
Dependent Claim
24 words
An optical apparatus according to claim 4, wherein said objective lens includes an aperture and said optical unit is located adjacent to said aperture.
Claim 11
Dependent Claim
32 words
An optical apparatus according to claim 1, further comprising a solid-state image pickup device, disposed at the imaging plane of said objective lens, for receiving the image stabilized by said optical lens.
Claim 12
Dependent Claim
32 words
An optical apparatus according to claim 4, further comprising a solid-state image pickup device, disposed at the imaging plane of said objective lens, for receiving the image stabilized by said optical unit.
References Cited (Backward Citations)
US3503663A
Cited
US3531176A
Cited
US3942862A
Cited
US3944324A
Cited
US3941451A
Cited
US4927250A
Cited
JPS6440120A
Cited
US5069537A
Cited
US5040881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |