US5103091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning optical apparatus having focal position deviation detecting and correcting capability
Assignee: Canon Inc
•
Filing: 1990-12-20
•
Granted: 1992-04-07
•
Expires: 2010-12-20
Abstract
Abstract A scanning optical apparatus according to the present invention comprises a light source, a modulator for modulating a light flux emitted from the light source, an image forming device for forming an image of the light flux from the light source to a predetermined position, a deflector for deflecting the light flux from the light source in a predetermined position, a photosensitive device for sensing the light flux deflected by the deflector, an adjusting device for adjusting an image forming position of the light flux by the image forming device in correspondence to a signal obtained by the photosensitive device and an inhibiting device when the light flux emitted from the light source is being modulated by the modulator in correspondence to a predetermined signal. By the scanning optical apparatus of the invention, the focal deviation can be always stably corrected and a stable image with high density can be obtained.
Inventors
- 👤 Yoshihiko Hirose
- 👤 Hitoshi Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:00
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/02; H04N3/08; G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/12; G02B26/127; G02B26/128; G02B27/00; G02B27/0025; G02B27/0031; H04N1/00; H04N1/024; H04N1/032; H04N1/036; H04N1/04; H04N1/113; H04N1/1135
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
133 words
A scanning optical apparatus comprising: a light source section; modulating means for modulating a light flux which is emitted from said light source section; image forming means for forming an image of the light flux from the light source section to a predetermined position; deflecting means for deflecting the light flux from the light source section in a predetermined direction; photo-sensitive means for sensing the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to a signal obtained by said photosensitive means; and inhibiting means for inhibiting the operation of said adjusting means when the light flux emitted from the light source section is being modulated by said modulating means in correspondence to a predetermined signal.
Claim 2
Dependent Claim
133 words
A scanning optical apparatus comprising: a light source section; modulating means for modulating a light flux which is emitted from said light source section; image forming means for forming an image of the light flux from the light source section to a predetermined position; deflecting means for deflecting the light flux from the light source section in a predetermined direction; photo-sensitive means for sensing the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to a signal obtained by said photosensitive means; and inhibiting means for inhibiting the operation of said adjusting means when the light flux emitted from the light source section is being modulated by said modulating means in correspondence to a predetermined signal.
Claim 3
Dependent Claim
21 words
An apparatus according to claim 1, wherein said adjusting means includes means for moving a part of the image forming means.
Claim 4
Dependent Claim
14 words
An apparatus according to claim 1, wherein said predetermined signal is an image signal.
Claim 5
Dependent Claim
116 words
A scanning optical apparatus comprising: a light source section; modulating means for modulating a light flux emitted from said light source section; deflecting means for deflecting the light flux from the light source section in a predetermined direction; lens means arranged between the light source section and the deflecting means; photosensitive means for sensing the light flux deflected by said deflecting means; adjusting means for adjusting the operation of the lens means in correspondence to a signal obtained by said photosensitive means; and inhibiting means for inhibiting the operation of the adjusting means when the light flux emitted from the light source section is being modulated by the modulating means in correspondence to a predetermined signal.
Claim 6
Dependent Claim
116 words
A scanning optical apparatus comprising: a light source section; modulating means for modulating a light flux emitted from said light source section; deflecting means for deflecting the light flux from the light source section in a predetermined direction; lens means arranged between the light source section and the deflecting means; photosensitive means for sensing the light flux deflected by said deflecting means; adjusting means for adjusting the operation of the lens means in correspondence to a signal obtained by said photosensitive means; and inhibiting means for inhibiting the operation of the adjusting means when the light flux emitted from the light source section is being modulated by the modulating means in correspondence to a predetermined signal.
Claim 7
Dependent Claim
138 words
A scanning optical apparatus comprising: a light source section; image forming means for forming an image of a light flux from said light source section; deflecting means for deflecting the light flux from the light source section in a predetermined direction; photosensitive means for sensing the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to a signal obtained by said photosensitive means; modulating means for modulating the light flux emitted from the light source section; and control means for controlling said modulating means and said adjusting means, said control means inhibiting the operation of the adjusting means when the light flux emitted from the light source section is being modulated by the modulating means in correspondence to a predetermined signal.
Claim 8
Dependent Claim
138 words
A scanning optical apparatus comprising: a light source section; image forming means for forming an image of a light flux from said light source section; deflecting means for deflecting the light flux from the light source section in a predetermined direction; photosensitive means for sensing the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to a signal obtained by said photosensitive means; modulating means for modulating the light flux emitted from the light source section; and control means for controlling said modulating means and said adjusting means, said control means inhibiting the operation of the adjusting means when the light flux emitted from the light source section is being modulated by the modulating means in correspondence to a predetermined signal.
Claim 9
Dependent Claim
131 words
A scanning optical apparatus comprising: a solid laser element; a laser driver connected to said solid laser element; an image forming optical system for forming an image of the light flux from the solid laser element to a predetermined position; a deflector to deflect the light flux from the solid laser element in a predetermined direction; a photodetector to detect the light flux deflected by said deflector; an image forming optical system driving section to move a part of the image forming optical system in correspondence to a signal detected by said photodetector; and inhibiting means for inhibiting the operation of said image forming optical system driving section when the light flux emitted from the solid laser element is being modulated by said laser driver in correspondence to a predetermined signal.
Claim 10
Dependent Claim
131 words
A scanning optical apparatus comprising: a solid laser element; a laser driver connected to said solid laser element; an image forming optical system for forming an image of the light flux from the solid laser element to a predetermined position; a deflector to deflect the light flux from the solid laser element in a predetermined direction; a photodetector to detect the light flux deflected by said deflector; an image forming optical system driving section to move a part of the image forming optical system in correspondence to a signal detected by said photodetector; and inhibiting means for inhibiting the operation of said image forming optical system driving section when the light flux emitted from the solid laser element is being modulated by said laser driver in correspondence to a predetermined signal.
Claim 11
Dependent Claim
172 words
A scanning optical apparatus comprising: a light source section; modulating means for modulating a light flux which is emitted from said light source section; image forming means for forming an image of the light flux from the light source section to a predetermined position; deflecting means for deflecting the light flux from the light source section in a predetermined direction; photosensitive means for sensing the light flux deflected by said deflecting means; and adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to a signal obtained by said photosensitive means, wherein the image forming position of the light flux is adjusted by making said adjusting means operative just before the light flux emitted from the light source section is modulated by said modulating means in correspondence to a predetermined signal, and after completion of the adjustment of the image forming position, the light flux emitted from the light source section is modulated by said modulating means in correspondence to said predetermined signal.
Claim 12
Dependent Claim
172 words
A scanning optical apparatus comprising: a light source section; modulating means for modulating a light flux which is emitted from said light source section; image forming means for forming an image of the light flux from the light source section to a predetermined position; deflecting means for deflecting the light flux from the light source section in a predetermined direction; photosensitive means for sensing the light flux deflected by said deflecting means; and adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to a signal obtained by said photosensitive means, wherein the image forming position of the light flux is adjusted by making said adjusting means operative just before the light flux emitted from the light source section is modulated by said modulating means in correspondence to a predetermined signal, and after completion of the adjustment of the image forming position, the light flux emitted from the light source section is modulated by said modulating means in correspondence to said predetermined signal.
Claim 13
Dependent Claim
114 words
A scanning method in a scanning optical apparatus comprising the steps of: leading a light flux which is emitted from a light source section to a predetermined position through image forming means and deflecting means; sensing the led light flux by photosensitive means arranged at a predetermined position; adjusting an image forming position of the light flux by said image forming means in correspondence to a signal obtained by said photosensitive means; and modulating the light flux emitted from the light source section in correspondence to a predetermined signal after completion of the adjusting of the image forming position and scanning said modulated light flux through said image forming means and said deflecting means.
Claim 14
Dependent Claim
114 words
A scanning method in a scanning optical apparatus comprising the steps of: leading a light flux which is emitted from a light source section to a predetermined position through image forming means and deflecting means; sensing the led light flux by photosensitive means arranged at a predetermined position; adjusting an image forming position of the light flux by said image forming means in correspondence to a signal obtained by said photosensitive means; and modulating the light flux emitted from the light source section in correspondence to a predetermined signal after completion of the adjusting of the image forming position and scanning said modulated light flux through said image forming means and said deflecting means.
Claim 15
Dependent Claim
14 words
A method according to claim 8, wherein said predetermined signal is an image signal.
Claim 16
Dependent Claim
113 words
A laser beam printer apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said light deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means when the light flux emitted from the light source section is being modulated.
Claim 17
Dependent Claim
113 words
A laser beam printer apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said light deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means when the light flux emitted from the light source section is being modulated.
Claim 18
Dependent Claim
21 words
An apparatus according to claim 10, wherein said adjusting means includes means for moving a part of the image forming means.
Claim 19
Dependent Claim
17 words
An apparatus according to claim 10, wherein said light source section is modulated by an image signal.
Claim 20
Dependent Claim
33 words
An apparatus according to claim 12, wherein the light flux emitted from the light source section is modulated in correspondence to said image signal so as to effect recording on said recording medium.
Claim 21
Dependent Claim
101 words
A laser beam printer apparatus comprising: a light source section; deflecting means for deflecting a light flux from the light source section; lens means arranged between the light source section and said deflecting means; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means when the light flux emitted from the light source section is being modulated.
Claim 22
Dependent Claim
101 words
A laser beam printer apparatus comprising: a light source section; deflecting means for deflecting a light flux from the light source section; lens means arranged between the light source section and said deflecting means; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means when the light flux emitted from the light source section is being modulated.
Claim 23
Dependent Claim
132 words
A laser beam printer apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; modulating means for modulating the light flux from the light source section; and control means for controlling said adjusting means and said modulating means, said control means inhibiting the operation of said adjusting means when the light flux emitted from the light source section is being modulated by said modulating means.
Claim 24
Dependent Claim
132 words
A laser beam printer apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; modulating means for modulating the light flux from the light source section; and control means for controlling said adjusting means and said modulating means, said control means inhibiting the operation of said adjusting means when the light flux emitted from the light source section is being modulated by said modulating means.
Claim 25
Dependent Claim
124 words
A laser beam printer apparatus comprising: a light source section; driving means for driving the light source section; image forming optical system for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; light receiving means for receiving the light flux deflected by said deflecting means; a driving section for moving a part of said image forming optical system in correspondence to a signal from said light receiving means; and inhibiting means for inhibiting the operation of said driving section when the light flux emitted from the light source section is being modulated by said driving means.
Claim 26
Dependent Claim
124 words
A laser beam printer apparatus comprising: a light source section; driving means for driving the light source section; image forming optical system for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; light receiving means for receiving the light flux deflected by said deflecting means; a driving section for moving a part of said image forming optical system in correspondence to a signal from said light receiving means; and inhibiting means for inhibiting the operation of said driving section when the light flux emitted from the light source section is being modulated by said driving means.
Claim 27
Dependent Claim
140 words
A laser beam printer apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; and adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; wherein said adjusting means is actuated to adjust the image forming position of the light flux prior to modulation of the light flux emitted from the light source section, and the light flux emitted from the light source section is modulated after adjustment of the image forming position has been completed.
Claim 28
Dependent Claim
140 words
A laser beam printer apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; and adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; wherein said adjusting means is actuated to adjust the image forming position of the light flux prior to modulation of the light flux emitted from the light source section, and the light flux emitted from the light source section is modulated after adjustment of the image forming position has been completed.
Claim 29
Dependent Claim
109 words
A laser beam printer apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means in correspondence to a recording operation to said recording medium.
Claim 30
Dependent Claim
109 words
A laser beam printer apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means in correspondence to a recording operation to said recording medium.
Claim 31
Dependent Claim
117 words
A laser beam printer apparatus comprising: a light source section; driving means for driving the light source section; image forming optical system for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; light receiving means for receiving the light flux deflected by said deflecting means; a driving section for moving a part of said image forming optical system in correspondence to a signal from said light receiving means; and inhibiting means for inhibiting the operation of said driving section in correspondence to a recording operation to said recording medium.
Claim 32
Dependent Claim
117 words
A laser beam printer apparatus comprising: a light source section; driving means for driving the light source section; image forming optical system for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; a recording medium which receives the light flux deflected by said deflecting means; light receiving means for receiving the light flux deflected by said deflecting means; a driving section for moving a part of said image forming optical system in correspondence to a signal from said light receiving means; and inhibiting means for inhibiting the operation of said driving section in correspondence to a recording operation to said recording medium.
Claim 33
Dependent Claim
91 words
A scanning optical apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means in response to a predetermined signal.
Claim 34
Dependent Claim
91 words
A scanning optical apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux deflected by said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means in response to a predetermined signal.
Claim 35
Dependent Claim
91 words
A scanning optical apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means when a predetermined signal is present.
Claim 36
Dependent Claim
91 words
A scanning optical apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means when a predetermined signal is present.
Claim 37
Dependent Claim
80 words
A scanning optical apparatus comprising: a light source section; deflecting means for deflecting a light flux from the light source section; lens means arranged between the light source section and said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means in response to a predetermined signal.
Claim 38
Dependent Claim
80 words
A scanning optical apparatus comprising: a light source section; deflecting means for deflecting a light flux from the light source section; lens means arranged between the light source section and said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means in response to a predetermined signal.
Claim 39
Dependent Claim
80 words
A scanning optical apparatus comprising: a light source section; deflecting means for deflecting a light flux from the light source section; lens means arranged between the light source section and said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means when a predetermined signal is present.
Claim 40
Dependent Claim
80 words
A scanning optical apparatus comprising: a light source section; deflecting means for deflecting a light flux from the light source section; lens means arranged between the light source section and said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; and inhibiting means for inhibiting the operation of said adjusting means when a predetermined signal is present.
Claim 41
Dependent Claim
99 words
A scanning optical apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and a control section for receiving a predetermined signal, said control section inhibiting the operation of said adjusting means when said predetermined signal is received.
Claim 42
Dependent Claim
99 words
A scanning optical apparatus comprising: a light source section; image forming means for forming an image of a light flux from the light source section; deflecting means for deflecting the light flux from the light source section; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting an image forming position of the light flux by said image forming means in correspondence to detection by said detecting means; and a control section for receiving a predetermined signal, said control section inhibiting the operation of said adjusting means when said predetermined signal is received.
Claim 43
Dependent Claim
88 words
A scanning optical apparatus comprising: a light source section; deflecting means for deflecting a light flux from the light source section; lens means arranged between the light source section and said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; and a control section for receiving a predetermined signal, said control section inhibiting the operation of said adjusting means when said predetermined signal is received.
Claim 44
Dependent Claim
88 words
A scanning optical apparatus comprising: a light source section; deflecting means for deflecting a light flux from the light source section; lens means arranged between the light source section and said deflecting means; detecting means for detecting the light flux deflected by said deflecting means; adjusting means for adjusting the operation of said lens means in correspondence to detection by said detecting means; and a control section for receiving a predetermined signal, said control section inhibiting the operation of said adjusting means when said predetermined signal is received.
Claim 45
Independent Claim
106 words
A method of scanning in a laser beam printer apparatus, comprising the steps of: guiding a light flux emitted from a light source section to a predetermined position using image forming means and deflecting means; receiving the guided light flux by light receiving means arranged in a predetermined position; adjusting an image forming position of the light flux by the image forming means in correspondence to a signal from the light receiving means; and modulating the light flux emitted from the light source section after adjusting step, and scanning a recording medium with the modulated light flux using the image forming means and the deflecting means.
Claim 46
Independent Claim
106 words
A method of scanning in a laser beam printer apparatus, comprising the steps of: guiding a light flux emitted from a light source section to a predetermined position using image forming means and deflecting means; receiving the guided light flux by light receiving means arranged in a predetermined position; adjusting an image forming position of the light flux by the image forming means in correspondence to a signal from the light receiving means; and modulating the light flux emitted from the light source section after adjusting step, and scanning a recording medium with the modulated light flux using the image forming means and the deflecting means.
Claim 47
Dependent Claim
16 words
A method according to claim 26, wherein the light flux is modulated by an image signal.
Claim 48
Independent Claim
83 words
A method of scanning in a scanning optical apparatus, comprising the steps of: guiding a light flux emitted from a light source section to a predetermined position using image forming means and deflecting means; receiving the guided light flux by light receiving means arranged in a predetermined position; adjusting an image forming position of the light flux by the image forming means in corresponded to a signal from the light receiving means; and inhibiting said adjusting step in correspondence to a predetermined signal.
Claim 49
Independent Claim
83 words
A method of scanning in a scanning optical apparatus, comprising the steps of: guiding a light flux emitted from a light source section to a predetermined position using image forming means and deflecting means; receiving the guided light flux by light receiving means arranged in a predetermined position; adjusting an image forming position of the light flux by the image forming means in corresponded to a signal from the light receiving means; and inhibiting said adjusting step in correspondence to a predetermined signal.
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