Patent US6157829A successfully refreshed from Google Patents.
Patent EP0357056A2 successfully refreshed from Google Patents.
EP0357056A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Camera system
Assignee: Pentax Corp
•
Filing: 1989-08-30
•
Granted: —
•
Expires: 2009-08-30
Abstract
Abstract A camera system including a camera body (1) having a focus adjusting mechanism (19-21), a photographic lens (2) having a diaphragm adjusting mechanism (62, 65, 70) and a power zoom mechanism (61, 64, 69) incorporated therein, an object distance measuring device (17, 18), and a drive (19, 19a, 73) for driving the focal length adjusting mechanism of the photographic lens, so that the photographic lens and the camera body are compatible with conventional camera body and photographic lens.
Inventors
- 👤 Masahiro Kawasaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 04:49
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12; G03B17/14; G03B7/00; G03B7/08; G03B7/091; G03B7/093
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
208 words
A camera to which a photographic lens is detachably mounted,comprising: a group of electrical contacts provided on a camera body mount to which the photographic lens is mounted; judging means for judging the type of the photographic lens in accordance with the state of connection of the photographic lens to the electrical contacts; first control means for controlling the photographic lens in response to a first information which consists of a pair of information of the electrical contacts as a whole and which represents a first type in which the photographic lens supplies only the first information to the camera body; second control means for controlling the photographic lens in response to a plurality of second information which are peculiar to the photographic lens and which represent a second type in which the photographic lens supplies the second information to the camera body through a memory means connected to the electrical contact group;and, third control means for controlling the photographic lens in response to a third information which represents a third type in which the photographic lens has an arithmetic / control means connected to the electrical contact group in addition to the memory means and receives and transmits the third information from and to the camera body.
Claim 2
Dependent Claim
208 words
A camera to which a photographic lens is detachably mounted,comprising: a group of electrical contacts provided on a camera body mount to which the photographic lens is mounted; judging means for judging the type of the photographic lens in accordance with the state of connection of the photographic lens to the electrical contacts; first control means for controlling the photographic lens in response to a first information which consists of a pair of information of the electrical contacts as a whole and which represents a first type in which the photographic lens supplies only the first information to the camera body; second control means for controlling the photographic lens in response to a plurality of second information which are peculiar to the photographic lens and which represent a second type in which the photographic lens supplies the second information to the camera body through a memory means connected to the electrical contact group;and, third control means for controlling the photographic lens in response to a third information which represents a third type in which the photographic lens has an arithmetic / control means connected to the electrical contact group in addition to the memory means and receives and transmits the third information from and to the camera body.
Claim 3
Dependent Claim
81 words
A camera according to claim 1 further comprising an object distance measuring means for detecting the quantity of defocus in accordance with the luminous flux of light incident thereupon through the photographic lens, focus adjusting mechanism driving means for driving a focus adjusting mechanism in accordance with the quantity of defocus detected by the object distance measuring means;and, transfer means for transmitting the driving power of the focus adjusting mechanism driving means to the focus adjusting means of the photographic lens.
Claim 4
Dependent Claim
67 words
A camera according to claim 1 or 2,wherein said second control means actuates the focus adjusting mechanism driving means in accordance with the quantity of defocus of the object distance measuring means when the second type of photographic lens having a focus adjusting mechanism and an association mechanism which associates the focus adjusting mechanism and the focus adjusting mechanism driving means is mounted to the camera body.
Claim 5
Dependent Claim
98 words
A camera according to claim 3,wherein said third control means sends the quantity of defocus detected by the object distance measuring means to the arithmetic / control means through the electrical contact group, so that the arithmetic / control means detecs the displacement of the focus adjusting mechanism in accordance with the quantity of defocus to actuate the focus control means based on the displacement when the third type of photographic lens having a focus adjusting mechanism,a focus control means for driving the focus adjusting mechanism and an arithmetic / control means is mounted to the camera body.
Claim 6
Dependent Claim
93 words
A camera according to claim 4,wherein said third control means sends the quantity of defocus detected by the object distance measuring means to the arithmetic / control means through the electrical contact group, so that the arithmetic / control means detects the displacement of the focus adjusting mechanism driving means to drive the focus adjusting mechanism driving means based on the displacement when the third type of photographic lens having a focus adjusting mechanism which is driven by the association mechanism and the arithmetic / control means is mounted to the camera body.
Claim 7
Dependent Claim
54 words
A camera according to anyone of the claims 1 to 5,further comprising an exposure control means for detecting a brightness of an object to be photographed to detect an F value and a shutter speed,and a diaphragm mechanism for driving a diaphragm driving means of the photographic lens detected by the exposure control means.
Claim 8
Dependent Claim
37 words
A camera according to claim 6,wherein said first control means actuates the exposure mechanism driving means in accordance with the F value detected by the exposure control means when the first type of photographing lens is mounted.
Claim 9
Dependent Claim
39 words
A camera according to claim 6 or 7,wherein said second control means actuates the exposure mechanism driving means in accordance with the F value detected by the exposure control means when the second type of photographing lens is mounted.
Claim 10
Dependent Claim
72 words
A camera according to anyone of claims 6 to 8 ,wherein said third control means sends the F value detected by the exposure means to the photographic lens through the electrical contact group to actuate the diaphragm control means in accordance with the F value when the third type of photographic lens having a diaphragm mechanism and a diaphragm control means for driving the diaphragm mechanism is mouted to the camera body.
Claim 11
Dependent Claim
137 words
A camera according to claim 2,wherein when the third type of photographic lens having a power zoom means,a focal length detecting means for detecting the focal length, a forward displacement detecting means for detecting the forward displacement of a focus lens and an arithmetic / control means is mounted to the camera body, the third control means sends data of the quantity of defocus detected by the object distance measuring means to the photographic lens through the electrical contact group,so that the arithmetic / control means detects a magnification based on the information from the forward displacement detecting means when the quantity of defocus is zero and the information from the focal length detecting means,whereby the defocus data is sent to the photographic lens to actuate the power zoom means so that the magnification is made constant.
Claim 12
Dependent Claim
146 words
A photographic lens especially for detachably mounting to the camera body of anyone of the foregoing claims, comprising: a group of electrical contacts which are to be connected to the camera body; first information transfer means for transmitting one steady information peculiar to the lens through a part of or all of the electrical contact group; second information transfer means for transmitting a plurality of variable information peculiar to the lens through memory means connected to the electrical contact group to the camera body; third information transfer means for transmitting and receiving information to and from the camera body through an arithmetic / control means connected to the electrical contact group;and, switching means for selecting the first information transfer means, the second information transfer means or the third information transfer means,in accordance with the state of connection of the electrical contact group to the camera body.
Claim 13
Dependent Claim
86 words
A photographic lens according to claim 11,wherein said switching means comprises a first switching means for selecting the first information transfer means or the second information transfer means and the third information transfer means, in accordance with the state of connection of the electrical contact group to the camera body,and a second switching means for selecting one of the second information transfer means and the third information transfer means when the first switching means selects the second information transfer means and the third information transfer means.
Claim 14
Dependent Claim
39 words
A photographic lens according to claim 11 or 12,wherein said steady information peculiar to the lens include maximum F value data of the lens,minimum F value data of the lens ,and auto / manual switching data of the diaphragm.
Claim 15
Dependent Claim
32 words
A photographic lens according to anyone of claims 11 to 13,wherein said variable information include maximum F value,minimum F value,a focal length,a forward displacement of a focusing lens, and a defocus coefficient.
Claim 16
Dependent Claim
33 words
A photographic lens according to claim 14,wherein said third information transfer means transmits the variable information to the camera body and receives the defocus data and the diaphragm data from the camera body.
Claim 17
Dependent Claim
32 words
A photographic lens according to anyone of claims 11 to 15,further comprising a focus adjusting mechanism which controls the focal point and a focus control means for driving the focus adjusting mechanism.
Claim 18
Dependent Claim
34 words
A photographic lens according to claim 16,wherein said arithmetic / control means actuates the focus control means in accordance with the defocus data input from the camera body through the third information transfer means.
Claim 19
Dependent Claim
35 words
A photographic lens according to claim 16 or 17, further comprising an association mechanism which is connected to a focus adjusting mechanism driving means provided on the camera body to drive the focus adjusting mechanism.
Claim 20
Dependent Claim
25 words
A photographic lens according to claim 18,wherein said focus adjusting mechanism is driven through the association mechanism when the second information transfer means is selected.
Claim 21
Dependent Claim
120 words
A photographic lens according to claim 18 or 19,wherein said arithmetic / control means arithmetically detects the displacement of the drive of the focus adjusting mechanism driving means on the camera body in accordance with the defocus data supplied by an object distance measuring means provided on the camera body through the third information transfer means and the defocus coefficient data stored in the memory means to send the data of displacement of the drive of the focus adjusting mechanism driving means to the camera body through the third information transfer means so that the focus adjusting mechanism is driven by the focus adjusting mechanism driving means which operates in response to the data of displacement through the association mechanism.
Claim 22
Dependent Claim
50 words
A photographic lens according to anyone of claims 11 to 20,further comprising a diaphragm mechanism which actuates the diaphragm,a diaphragm control means for driving the diaphragm mechanism,and a diaphragm association mechanism which transmits the drive force of a diaphragm driving mechanism provided on the camera body to the diaphragm mechanism.
Claim 23
Dependent Claim
42 words
A photographic lens according to claim 21,wherein said arithmetic / control means actuates the diaphragm control means in accordance with the diaphragm data input from the camera body through the third information transfer means when the third information transfer means is selected.
Claim 24
Dependent Claim
38 words
A photographic lens according to claim 21 or 22,wherein said diaphragm mechanism is driven by the diaphragm driving mechanism provided on the camera body when the first information transfer means or the second information transfer means is selected.
Claim 25
Dependent Claim
114 words
A photographic lens according to anyone of claims 11 to 23,further comprising a power zoom means,a focal length detecting means for detecting the focal length, and a detecting means for detecting the forward displacement of the focus lens ,and wherein said arithmetic / control means receives an "in focus"data from the camera body when the third information transfer means is selected to detect the magnification based on the data of the forward displacement detecting means and the data of the focal length detecting means,whereby the power zoom means is actuated in accordance with the defocus data sent from the camera body in a direction in which the magnification of the image is maintained constant.
Claim 26
Dependent Claim
29 words
A photographic lens according to anyone of claims 16 to 24,wherein at least the focus control means is supplied from the camera body through one of the electrical contacts.
Claim 27
Dependent Claim
29 words
A photographic lens according to anyone of claims 21 to 25,wherein at least the diaphragm control means is supplied from the camera body through one of the electrical contacts.
Claim 28
Dependent Claim
29 words
A photographic lens according to anyone of claims 21 to 26,wherein at least the power zoom means is supplied from the camera body through one of the electrical contacts.
Claim 29
Dependent Claim
43 words
A photographic lens according to anyone of claims 11 to 27,wherein said electrical contact group has a plurality of electrical contacts which are electrically insulated from each other and which are provided on the surface of a mount ring of a lens mount.
Claim 30
Dependent Claim
53 words
A photographic lens according to anyone of claims 11 to 28,wherein said electrical contact group has one or a plurality of electrically insulated contacts provided on the surface of the mount ring of the lens mount,and one or a plurality of electrically insulated contacts provided inside the mount ring of the lens mount.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.