US4764786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distance measuring device for camera
Assignee: Canon Inc
•
Filing: 1987-10-22
•
Granted: 1988-08-16
•
Expires: 2007-10-22
Abstract
Abstract A distance measuring device for a camera includes a first distance measuring arrangement adapted for measuring the distance of the middle part of a photographing field; a second distance measuring arrangement for measuring the distances of the middle and peripheral parts of the field; and a switch for selection between the first and second distance measuring arrangements.
Inventors
- 👤 Shuichi Tamura
- 👤 Yoshihiro Harunari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:52
CPC Classifications
G; G03; G03B; G03B3/00; G03B3/10; G01; G01S; G01S17/00; G01S17/02; G01S17/06; G01S17/46; G01S7/00; G01S7/48; G01S7/491; G01S7/4912
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
118 words
A device for forming a focal adjustment information for a camera, comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when the distance measurement by said first distance measuring means and the distance measurement by the second distance measuring means are not in a range coverable by a field depth.
Claim 2
Independent Claim
118 words
A device for forming a focal adjustment information for a camera, comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when the distance measurement by said first distance measuring means and the distance measurement by the second distance measuring means are not in a range coverable by a field depth.
Claim 3
Dependent Claim
104 words
A focal distance information forming device for a camera, comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming a focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means in case when said distance measurement by the first distance measuring means is within a predetermined distance range.
Claim 4
Dependent Claim
104 words
A focal distance information forming device for a camera, comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming a focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means in case when said distance measurement by the first distance measuring means is within a predetermined distance range.
Claim 5
Dependent Claim
46 words
A device according to claim 2, wherein said control means forms the focal adjustment information by preferentially using the distance measurement obtained by said second distance measuring means when the distance measurement obtained by said first distance measuring means is not within said predetermined distance range.
Claim 6
Dependent Claim
56 words
A device according to claim 2, wherein said control means forms the focal adjustment information by using the distance measurement obtained by said first distance measuring means without using the distance measurement obtained by the second distance measuring means when the distance measurement obtained by said first distance measuring means is within said predetermeined distance range.
Claim 7
Dependent Claim
59 words
A device according to claim 2, wherein said control means forms the focal adjustment information on the basis of the distance measurement obtained by said second distance measuring means without using the distance measurement obtained by the first distance measuring means when the distance measurement obtained by said first distance measuring means is not within said predetermined distance range.
Claim 8
Dependent Claim
91 words
A device according to claim 2, wherein said control means forms the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when the distance measurement obtained by said first distance measuring means is within said predetermined distance range and an adjusted focal point of a photographic optical system determined by the measurement by said first distance measuring means is separated more than a predetermined value from an adjusted focal point of the optical system determined by the measurement by said second distance measuring means.
Claim 9
Dependent Claim
71 words
A device according to claim 2, whererin said control means forms the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when the measurement obtained by said first distance measuring means is within the predetermined distance range and the distance measurement obtained by the first distance measuring obtained by said second distance measuring means are not in a range coverable by a field depth.
Claim 10
Independent Claim
88 words
A device for forming a focal adjustment information for a camera, comprising: (A) first distance measuring means for measuring a distance of a first range of a scene to be photographed; (B) second distance measuring means for measuring a distance of a second range of the scene, and; (C) control means for forming a focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means in case when said distance measurement by the first distance measuring means is within a predetermined distance range.
Claim 11
Independent Claim
88 words
A device for forming a focal adjustment information for a camera, comprising: (A) first distance measuring means for measuring a distance of a first range of a scene to be photographed; (B) second distance measuring means for measuring a distance of a second range of the scene, and; (C) control means for forming a focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means in case when said distance measurement by the first distance measuring means is within a predetermined distance range.
Claim 12
Dependent Claim
46 words
A device according to claim 8, wherein said control means forms the focal adjustment information by preferentially using the distance measurement obtained by said second distance measuring means when the distance measurement obtained by said first distance measuring means is not within said predetermined distance range.
Claim 13
Dependent Claim
56 words
A device according to claim 8, wherein said control means forms the focal adjustment information by using the distance measurement obtained by said first distance measuring means without using the distance measurement obtained by the second distance measuring means when the distance measurement obtained by said first distance measuring means is within said predetermined distance range.
Claim 14
Dependent Claim
59 words
A device according to claim 8, wherein said control means forms the focal adjustment information on the basis of the distance measurement obtained by said second distance measuring means without using the distance measurement obtained by the first distance measuring means when the distance measurement obtained by said first distance measuring means is not within said predetermined distance range.
Claim 15
Independent Claim
141 words
A device for forming a focal adjustment information for a camera comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when an adjusted focal point of a photographic optical system determined in correspondence to the distance measurement by said first distance measuring means is separated more than a predetermined value from an adjusted focal point of the photographic optical system determined in correspondence to the distance measurement by said second distance measuring means.
Claim 16
Independent Claim
141 words
A device for forming a focal adjustment information for a camera comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when an adjusted focal point of a photographic optical system determined in correspondence to the distance measurement by said first distance measuring means is separated more than a predetermined value from an adjusted focal point of the photographic optical system determined in correspondence to the distance measurement by said second distance measuring means.
Claim 17
Independent Claim
139 words
A device for forming a focal adjustment information for a camera, comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when an adjusted focal point of a photographic optical system determined in correspondence to the distance measurement by said first distance measuring means and an adjusted focal point of the photographic optical system determined in correspondence to the distance measurement of said second distance measuring means are within a predetermined value.
Claim 18
Independent Claim
139 words
A device for forming a focal adjustment information for a camera, comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when an adjusted focal point of a photographic optical system determined in correspondence to the distance measurement by said first distance measuring means and an adjusted focal point of the photographic optical system determined in correspondence to the distance measurement of said second distance measuring means are within a predetermined value.
Claim 19
Dependent Claim
90 words
A device according to claim 13, wherein said control means forms the focal adjustment information by using the distance measurement obtained by said first distance measuring means without using the distance measurement obtained by the second distance measuring means when the adjusted focal point of the photographic optical system determined in correspondence to the distance measurement by said first distance measuring means and the adjusted focal point of the photographic optical system determined in correspondence to the distance measurement by said second distance measuring means are within said predetermined value.
Claim 20
Independent Claim
117 words
A device for forming a focal adjustment information for a camera comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when the distance measurement by said first distance measuring means and the distance measurement by the second distance measuring means are in a range coverable by a field depth.
Claim 21
Independent Claim
117 words
A device for forming a focal adjustment information for a camera comprising: (A) first distance measuring means for measuring a distance of a roughly central portion of a scene to be photographed; (B) second distance measuring means for measuring a distance of a roughly peripheral portion of the scene or the distance of the roughly central portion and the roughly peripheral portion of the scene; and (C) control means for forming the focal adjustment information by preferentially using the distance measurement obtained by said first distance measuring means when the distance measurement by said first distance measuring means and the distance measurement by the second distance measuring means are in a range coverable by a field depth.
Claim 22
Dependent Claim
68 words
A device according to claim 15, wherein said control means forms the focal adjustment information by using the distance measurement obtained by said first distance measuring means without using the distance measurement obtained by the second distance measuring means when the distance measurement by said first distance measuring means and the distance measurement by the second distance measuring means are in said range coverable by the field depth.
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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |