Patent US5227832A successfully refreshed from Google Patents.
US5227832A
Expired / Lapsed
US
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Camera system
Assignee: Pentax Corp
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Filing: 1991-08-22
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Granted: 1993-07-13
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Expires: 2011-08-22
Abstract
Abstract A camera system including a camera body and a photographing lens detachably mounted to the camera body including a memory for storing function data on the aberration correction peculiar to the taking lens, an arithmetic operating device for calculating necessary aberration correction data in accordance with the aberration correction function data stored in the memory, and an output device for outputting the calculated aberration correction data to the camera body.
Inventors
- 👤 Masahiro Kawasaki
- 👤 Hiroyuki Takahashi
- 👤 Shigeru Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:36
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/282
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
130 words
A camera system including a camera body and a photographing lens which is detachably mounted to the camera body, wherein said photographing lens comprises: a memory means for storing function data on the aberration correction peculiar to said photographing lens; an arithmetic operating means for calculating necessary aberration correction data in accordance with the aberration correction function data stored in said memory means; and, an output means for outputting the calculated aberration correction data to said camera body; wherein the aberration correction data A is obtained by the following equations (1) and (2) when the present focal length fx is smaller and larger than a first reference focal length f0, respectively; A=a(fx-f0) (1) A=b(fx-f1)+a(f1-f0) (2) wherein f1 represents a second reference focal length; a and b represent coefficients; and f0>f1.
Claim 2
Dependent Claim
130 words
A camera system including a camera body and a photographing lens which is detachably mounted to the camera body, wherein said photographing lens comprises: a memory means for storing function data on the aberration correction peculiar to said photographing lens; an arithmetic operating means for calculating necessary aberration correction data in accordance with the aberration correction function data stored in said memory means; and, an output means for outputting the calculated aberration correction data to said camera body; wherein the aberration correction data A is obtained by the following equations (1) and (2) when the present focal length fx is smaller and larger than a first reference focal length f0, respectively; A=a(fx-f0) (1) A=b(fx-f1)+a(f1-f0) (2) wherein f1 represents a second reference focal length; a and b represent coefficients; and f0>f1.
Claim 3
Dependent Claim
15 words
A camera system according to claim 1, wherein said photographing lens is a zoom lens.
Claim 4
Dependent Claim
23 words
A camera system according to claim 2, wherein said zoom lens comprises a focal length detecting means for detecting the focal length thereof.
Claim 5
Dependent Claim
35 words
A camera system according to claim 3, wherein said memory means of said zoom lens stores therein predetermined aberration functions of different kinds of photographing lens aberrations, corresponding to a plurality of focal length zones.
Claim 6
Dependent Claim
44 words
A camera system according to claim 4, wherein said arithmetic operating means of said zoom lens selects the aberration correction functions corresponding to the aberration characteristics of said zoom lens and calculates the aberration correction data in accordance with the selected aberration correction function.
Claim 7
Dependent Claim
61 words
A camera system according to claim 2, wherein said camera body comprises a focus detecting means for detecting said focus of the zoom lens in accordance with light of an object to be taken incident thereon through said zoom lens so that said focus detecting means corrects the focus in accordance with the aberration correction data input from a taking lens.
Claim 8
Dependent Claim
34 words
A camera system according to claim 1, wherein said camera body comprises a focus detecting means for outputting a focus signal in accordance with the image of an object formed by a photographing lens.
Claim 9
Dependent Claim
36 words
A camera system according to claim 7, wherein said camera body comprises an arithmetic operating means for calculating focus data in accordance with the focus signal and the aberration correction function input from said photographing lens.
Claim 10
Dependent Claim
30 words
A camera system according to claim 1, wherein said camera body and said photographing lens comprise data input and output means for transmitting and receiving the aberration correction data therethrough.
Claim 11
Dependent Claim
36 words
A camera system according to claim 9, wherein said taking lens comprises a clock outputting means for outputting a clock signal so that the aberration correction data is transmitted and received synchronously with said clock signal.
Claim 12
Dependent Claim
130 words
A camera system including a camera body and a photographing lens which is detachably mounted to the camera body, wherein said photographing lens comprises: a memory means for storing function data on the aberration correction peculiar to said photographing lens; an arithmetic operating means for calculating necessary aberration correction data in accordance with the aberration correction function data stored in said memory means; and, an output means for outputting the calculated aberration correction data to said camera body; wherein the aberration correction data A is obtained by the following equations (3) and (4) when the present focal length fx is larger and smaller than a first reference focal length f0, respectively; A=a(fx-f0) (3) A=b(fx-f1)+a(f1-f0) (4) wherein f1 represents a second reference focal length; a and b represent coefficients; and f0>f1.
Claim 13
Dependent Claim
130 words
A camera system including a camera body and a photographing lens which is detachably mounted to the camera body, wherein said photographing lens comprises: a memory means for storing function data on the aberration correction peculiar to said photographing lens; an arithmetic operating means for calculating necessary aberration correction data in accordance with the aberration correction function data stored in said memory means; and, an output means for outputting the calculated aberration correction data to said camera body; wherein the aberration correction data A is obtained by the following equations (3) and (4) when the present focal length fx is larger and smaller than a first reference focal length f0, respectively; A=a(fx-f0) (3) A=b(fx-f1)+a(f1-f0) (4) wherein f1 represents a second reference focal length; a and b represent coefficients; and f0>f1.
Claim 14
Dependent Claim
47 words
A camera system according to claim 11, wherein the focus is adjusted by the following equation when the aperture of the photographing lens is between an open aperture and a predetermined value: 4(A-16)/256+(b-3)N/256; wherein B represents a close distance aberration correction value, and N represents distance data.
Claim 15
Dependent Claim
55 words
A camera system according to claim 11, wherein the focus is adjusted by the following equation when the aperture of the photographing lens is diaphragmed beyond a predetermined value: 8(C-8)/256+(B-3)ND/256; wherein B represents a close distance aberration correction value, C represents a stop-down aberration correction value, D represents a coefficient and N represents distance data.
Claim 16
Dependent Claim
116 words
A photographing lens detachably mounted to a camera body, comprising: a memory means for storing function data on the aberration correction peculiar to said photographing lens; an arithmetic operating means for calculating necessary aberration correction data in accordance with the aberration correction function data stored in said memory means; and, an output means for outputting the calculated aberration correction data to said camera body; wherein the aberration correction data A is obtained by the following equations (1) and (2) when the present focal length fx is smaller and larger than a first reference focal length f0, respectively; A=a(fx-f0) (1) A=b(fx-f1)+a(f1-f0) (2) wherein f1 represents a second reference focal length; a and b represent coefficients; and f0>f1.
Claim 17
Dependent Claim
116 words
A photographing lens detachably mounted to a camera body, comprising: a memory means for storing function data on the aberration correction peculiar to said photographing lens; an arithmetic operating means for calculating necessary aberration correction data in accordance with the aberration correction function data stored in said memory means; and, an output means for outputting the calculated aberration correction data to said camera body; wherein the aberration correction data A is obtained by the following equations (1) and (2) when the present focal length fx is smaller and larger than a first reference focal length f0, respectively; A=a(fx-f0) (1) A=b(fx-f1)+a(f1-f0) (2) wherein f1 represents a second reference focal length; a and b represent coefficients; and f0>f1.
Claim 18
Dependent Claim
15 words
A photographing lens according to claim 14, wherein said photographing lens is a zoom lens.
Claim 19
Dependent Claim
23 words
A photographing lens according to claim 15, wherein said zoom lens comprises a focal length detecting means for detecting the focal length thereof.
Claim 20
Dependent Claim
38 words
A photographing lens according to claim 16, wherein said memory means of said zoom lens stores therein predetermined aberration functions on the different kinds of aberrations of the photographing lens, corresponding to a plurality of focal length zones.
Claim 21
Dependent Claim
44 words
A photographing lens according to claim 17, wherein said arithmetic operating means of the zoom lens selects the aberration correction functions corresponding to the aberration characteristics of the zoom lens and calculates the aberration correction data in accordance with the, selected aberration correction function.
Claim 22
Dependent Claim
36 words
A photographing lens according to claim 18, wherein said photographing lens comprises a clock outputting means for outputting a clock signal so that the aberration correction data is transmitted and received synchronously with said clock signal.
Claim 23
Dependent Claim
116 words
A photographing lens detachably mounted to a camera body, comprising: a memory means for storing function data on the aberration correction peculiar to said photographing lens; an arithmetic operating means for calculating necessary aberration correction data in accordance with the aberration correction function data stored in said memory means; and, an output means for outputting the calculated aberration correction data to said camera body; wherein the aberration correction data A is obtained by the following equations (3) and (4) when the present focal length fx is larger and smaller than a first reference focal length f0, respectively: A=a(fx-f0) (3) A=b(fx-f1)+a(f1-f0) (4) wherein f1 represents a second reference focal length; a and b represent coefficients; and f0>f1.
Claim 24
Dependent Claim
116 words
A photographing lens detachably mounted to a camera body, comprising: a memory means for storing function data on the aberration correction peculiar to said photographing lens; an arithmetic operating means for calculating necessary aberration correction data in accordance with the aberration correction function data stored in said memory means; and, an output means for outputting the calculated aberration correction data to said camera body; wherein the aberration correction data A is obtained by the following equations (3) and (4) when the present focal length fx is larger and smaller than a first reference focal length f0, respectively: A=a(fx-f0) (3) A=b(fx-f1)+a(f1-f0) (4) wherein f1 represents a second reference focal length; a and b represent coefficients; and f0>f1.
Claim 25
Dependent Claim
47 words
A photographing lens according to claim 20, wherein the focus is adjusted by the following equation when the aperture of the taking lens is between an open aperture and a predetermined value: 4(A-16)/256+(B-3)N/256; wherein B represents a close distance aberration correction value, and N represents distance data.
Claim 26
Dependent Claim
56 words
A photographing lens according to claim 20, wherein the focus is adjusted by the following equation when the aperture of the photographing lens is diaphragmed beyond a predetermined value: 8(C-8)256+(B-3)ND/256; wherein B represents a close distance aberration correction value, C represents a stop-down aberration correction value, D represents a coefficient and N represents a distance data.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |