Patent US4586802A successfully refreshed from Google Patents.
US4586802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera capable of special effects photography
Assignee: Canon Inc
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Filing: 1985-04-16
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Granted: 1986-05-06
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Expires: 2005-04-16
Abstract
Abstract A camera for making photographs with special effects comprising a photographic optical system having a path of light for forming an object image on an image receiver, a finder optical system having an optical path for observing a special effect filter arranged in the photographic optical path to bring about a special portrayal effect on the image of the object, and an auxiliary filter having a different characteristic from that of the special effect filter and arranged in the observing optical path to bring about a special effect on the object image to be observed.
Inventors
- 👤 Akihiko Nagano
- 👤 Kiyoshi Iizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:49
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12; G03B11/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A camera comprising: (a) a photographic optical system having a photographic optical path and arranged to form an image of an object on an image receiver; (b) a finder optical system having an observation optical path to observe an object; (c) a special effect filter arranged in the photographic optical path to bring about a special portrayal effect on the object image; and (d) an auxiliary filter a different characteristic to that of said special effect filter and arranged in the observation optical path to bring about a special effect on an object image to be observed.
Claim 2
Dependent Claim
97 words
A camera comprising: (a) a photographic optical system having a photographic optical path and arranged to form an image of an object on an image receiver; (b) a finder optical system having an observation optical path to observe an object; (c) a special effect filter arranged in the photographic optical path to bring about a special portrayal effect on the object image; and (d) an auxiliary filter a different characteristic to that of said special effect filter and arranged in the observation optical path to bring about a special effect on an object image to be observed.
Claim 3
Dependent Claim
21 words
A camera according to claim 1, wherein said special effect filter and said auxiliary filter both bring about soft focus effects.
Claim 4
Dependent Claim
26 words
A camera according to claim 2, wherein said special effect filter and said auxiliary filter each are a phase type filter having dots arranged at random.
Claim 5
Dependent Claim
36 words
A camera according to claim 3, satisfying the following relationship: 0.02A.sub.L <A.sub.F <0.2A.sub.L where A L is the dot diameter of said special effect filter, and A F is the dot diameter of said auxiliary filter.
Claim 6
Dependent Claim
35 words
A camera according to claim 1, further comprising: changeover means for synchronously putting said special effect filter and said auxiliary filter into their operative positions as normal photography is changed over to special portrayal photography.
Claim 7
Dependent Claim
25 words
A camera according to claim 1, wherein said auxiliary filter is releasably attached to the rear of an eyepiece lens of said finder optical system.
Claim 8
Dependent Claim
87 words
A shooting process comprising the steps of: (a) attaching a first filter to a photographic optical system so that a soft focus effect is produced on an image of an object formed on image receiving means by said system; (b) attaching a second filter having a different characteristic to that of said first filter to a finder optical system so that a soft focus effect is produced on an image of the same object to be observed; and (c) making an exposure while observing the object image.
Claim 9
Dependent Claim
87 words
A shooting process comprising the steps of: (a) attaching a first filter to a photographic optical system so that a soft focus effect is produced on an image of an object formed on image receiving means by said system; (b) attaching a second filter having a different characteristic to that of said first filter to a finder optical system so that a soft focus effect is produced on an image of the same object to be observed; and (c) making an exposure while observing the object image.
Claim 10
Dependent Claim
19 words
A process according to claim 7, wherein said second filter is lower in cut-off frequency than said first filter.
Claim 11
Dependent Claim
50 words
A process according to claim 7, wherein said first filter and said second filter each are a phase type filter having dots arranged at random, satisfying the following relationship: 0.02A.sub.L <A.sub.F <0.2A.sub.L where A L and A F are the dot diameters of said first and said second filters respectively.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |