US4393409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focusing apparatus for image pickup device
Assignee: Olympus Corp
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Filing: 1981-05-12
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Granted: 1983-07-12
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Expires: 2001-05-12
Abstract
Abstract A focusing apparatus for an image pickup device includes a focusing mechanism for carrying out focus adjustment for the image pickup; a zooming mechanism for carrying out zoom adjustment for the image pickup; a detector for furnishing zoom data corresponding to the extent of zoom adjustment carried out by the zooming mechanism; and a driver for actuating the focusing mechanism in accordance with the zoom data. The focusing mechanism, zooming mechanism, detector and driver jointly comprise a servo loop for carrying out the prescribed adjustment of the focus in accordance with the extent of zoom adjustment carried out by the zooming mechanism.
Inventors
- 👤 Kenji Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:22
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/32; G03B13/34; G03B13/36
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
208 words
A focusing apparatus for an image pickup device comprising: (a) an image pickup; (b) focusing means for carrying out focus adjustment for said image pickup; (c) zooming means coupled to said focusing means for carrying out zoom adjustment for said image pickup; (d) first detection means coupled to said zooming means for supplying zoom data corresponding to the extent of zoom adjustment carried out by said zooming means; (e) drive means for actuating said focusing means in accordance with said zoom data; said focusing means, zooming means, first detection means and drive means jointly comprising a servo loop for carrying out a prescribed adjustment of the focus in accordance with the extent of zoom adjustment carried out by said zooming means; and (f) second detection means coupled to said focusing means for providing focus data corresponding to the extent of focus adjustment carried out by said focusing means, said focus data being used as a control target of said servo loop; said second detection means including a screen which is connected to said focusing means and whose light transmittance varies with the extent of focus adjustment, and a photoelectric converter coupled to said screen for issuing focus data corresponding to the amount of light transmitted through said screen.
Claim 2
Dependent Claim
208 words
A focusing apparatus for an image pickup device comprising: (a) an image pickup; (b) focusing means for carrying out focus adjustment for said image pickup; (c) zooming means coupled to said focusing means for carrying out zoom adjustment for said image pickup; (d) first detection means coupled to said zooming means for supplying zoom data corresponding to the extent of zoom adjustment carried out by said zooming means; (e) drive means for actuating said focusing means in accordance with said zoom data; said focusing means, zooming means, first detection means and drive means jointly comprising a servo loop for carrying out a prescribed adjustment of the focus in accordance with the extent of zoom adjustment carried out by said zooming means; and (f) second detection means coupled to said focusing means for providing focus data corresponding to the extent of focus adjustment carried out by said focusing means, said focus data being used as a control target of said servo loop; said second detection means including a screen which is connected to said focusing means and whose light transmittance varies with the extent of focus adjustment, and a photoelectric converter coupled to said screen for issuing focus data corresponding to the amount of light transmitted through said screen.
Claim 3
Dependent Claim
33 words
A focusing apparatus according to claim 1, wherein said first detection means includes a potentiometer which is coupled to said zooming means and is actuated in accordance with the extent of zoom adjustment.
Claim 4
Dependent Claim
55 words
A focusing apparatus according to claim 1, wherein said first detection means includes a screen which is connected to said zooming means and whose light transmittance varies with the extent of zoom adjustment, and a photoelectric converter coupled to said screen for issuing zoom data corresponding to the amount of light transmitted through said screen.
Claim 5
Dependent Claim
173 words
A focusing apparatus for an image pickup device comprising: (a) an image pickup; (b) focusing means for carrying out focus adjustment for said image pickup; (c) zooming means coupled to said focusing means for carrying out zoom adjustment for said image pickup; (d) first detection means coupled to said zooming means for sending forth a first signal indicating the extent of zooming carried out by said zooming means; (e) conversion means coupled to said first detection means for converting said first signal into a second signal whose D.C. potential varies with the set condition of said conversion means; (f) second detection means coupled to said focusing means for issuing a third signal indicating the extent of focus adjustment carried out by said focusing means; (g) composing means coupled to said conversion means and to said second detection means for composing said second signal and third signal into a fourth signal; and (h) amplifier means coupled to said composing means for driving said focusing means in accordance with the magnitude of said fourth signal.
Claim 6
Dependent Claim
173 words
A focusing apparatus for an image pickup device comprising: (a) an image pickup; (b) focusing means for carrying out focus adjustment for said image pickup; (c) zooming means coupled to said focusing means for carrying out zoom adjustment for said image pickup; (d) first detection means coupled to said zooming means for sending forth a first signal indicating the extent of zooming carried out by said zooming means; (e) conversion means coupled to said first detection means for converting said first signal into a second signal whose D.C. potential varies with the set condition of said conversion means; (f) second detection means coupled to said focusing means for issuing a third signal indicating the extent of focus adjustment carried out by said focusing means; (g) composing means coupled to said conversion means and to said second detection means for composing said second signal and third signal into a fourth signal; and (h) amplifier means coupled to said composing means for driving said focusing means in accordance with the magnitude of said fourth signal.
Claim 7
Dependent Claim
45 words
A focusing apparatus according to claim 4, comprising a source of a fifth signal whose magnitude changes the degree of focus adjustment carried out by said focusing means, and wherein said composing means combines together said second signal, said third signal and said fifth signal.
Claim 8
Dependent Claim
33 words
A focusing apparatus according to claim 4, wherein said second detection means includes a potentiometer which is coupled to said focusing means and is actuated in accordance with the extent of focus adjustment.
Claim 9
Dependent Claim
58 words
A focusing apparatus according to claim 3, wherein said second detection means includes a screen which is connected to said focusing means and whose light transmittance varies with the extent of focus adjustment, and a photoelectric converter which is coupled to said screen for issuing said third signal corresponding to the amount of light transmitted through said screen.
Claim 10
Dependent Claim
40 words
A focusing apparatus according to any one of claims 4, 5, 6 or 7, wherein said first detection means includes a potentiometer which is coupled to said zooming means and is actuated in accordance with the extent of zoom adjustment.
Claim 11
Dependent Claim
63 words
A focusing apparatus according to any one of claims 4, 5, 6 or 7, wherein said first detection means includes a screen which is connected to said zooming means and whose light transmittance varies with the extent of zoom adjustment, and a photoelectric converter coupled to said screen for issuing said first signal corresponding to the amount of ligh transmitted through said screen.
Claim 12
Dependent Claim
170 words
A focusing apparatus for an image pickup device comprising: (a) an image pickup; (b) focusing means for carrying out focus adjustment for said image pickup; (c) zooming means coupled to said focusing means for carrying out zoom adjustment for said image pickup; (d) first detection means coupled to said zooming means for supplying zoom data corresponding to the extent of zoom adjustment carried out by said zooming means, said first detection means including a screen which is connected to said zooming means and whose light transmittance varies with the extent of zoom adjustment, and a photoelectric converter coupled to said screen for issuing said zoom data corresponding to the amount of light transmitted through said screen; and (e) drive means for actuating said focusing means in accordance with said zoom data; said focusing means, zooming means, first detection means and drive means jointly comprising a servo loop for carrying out a prescribed adjustment of the focus in accordance with the extent of zoom adjustment carried out by said zooming means.
Claim 13
Dependent Claim
170 words
A focusing apparatus for an image pickup device comprising: (a) an image pickup; (b) focusing means for carrying out focus adjustment for said image pickup; (c) zooming means coupled to said focusing means for carrying out zoom adjustment for said image pickup; (d) first detection means coupled to said zooming means for supplying zoom data corresponding to the extent of zoom adjustment carried out by said zooming means, said first detection means including a screen which is connected to said zooming means and whose light transmittance varies with the extent of zoom adjustment, and a photoelectric converter coupled to said screen for issuing said zoom data corresponding to the amount of light transmitted through said screen; and (e) drive means for actuating said focusing means in accordance with said zoom data; said focusing means, zooming means, first detection means and drive means jointly comprising a servo loop for carrying out a prescribed adjustment of the focus in accordance with the extent of zoom adjustment carried out by said zooming means.
Claim 14
Dependent Claim
47 words
A focusing apparatus according to claim 10, further comprising: second detection means coupled to said focusing means for providing focus data corresponding to the extent of focus adjustment carried out by said focusing means, said focus data being used as a control target of said servo loop.
Claim 15
Dependent Claim
33 words
A focusing apparatus according to claim 11, wherein said second detection means includes a potentiometer which is coupled to said focusing means and is actuated in accordance with the extent of focus adjustment.
References Cited (Backward Citations)
US3283231A
Cited
US3400212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |