Patent US4763134A successfully refreshed from Google Patents.
US4763134A
Expired / Lapsed
US
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Laser recording apparatus having variable recording magnification and beam intensity control
Assignee: Konica Minolta Inc
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Filing: 1986-08-20
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Granted: 1988-08-09
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Expires: 2006-08-20
Abstract
Abstract A laser recording apparatus wherein an image is recorded by laser beam scanning, and a stop amount of a stop is varied in accordance with recording magnification. The stop is disclosed at a position whereat it can vary the beam radius of a laser beam incident in a focusing lens. The optical intensity of a laser beam is varied in accordance with the recording magnification.
Inventors
- 👤 Takashi Murahashi
- 👤 Yoshiyuki Ichihara
- 👤 Toshihiko Nakazawa
- 👤 Toshihiro Takesue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:29
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/12; G11B7/125; G11B7/127; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/326; G11B7/126; G03G15/04; G03G15/041; H; H01; H01S; H01S5/00; H01S5/06; H01S5/062; H01S5/06233; H01S5/06236; H01S5/0624; H01S5/068; H01S5/06817
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
180 words
A laser recording apparatus comprising: a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, improved means for selecting a recording magnification for an image formed on the photosensitive surface by selecting a corresponding radius of the light beam, including aperture means for forming an aperture of a selected radius through which the light beam is directed, and laser drive means for driving the laser light source to emit a light beam of an intensity which is varied in accordance with the desired recording magnification, said laser drive means being operated to emit a light beam of an intensity distribution having an effective recording radius of light capable of forming a recording image which corresponds to the selected radius for the light beam set by said aperture means.
Claim 2
Dependent Claim
180 words
A laser recording apparatus comprising: a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, improved means for selecting a recording magnification for an image formed on the photosensitive surface by selecting a corresponding radius of the light beam, including aperture means for forming an aperture of a selected radius through which the light beam is directed, and laser drive means for driving the laser light source to emit a light beam of an intensity which is varied in accordance with the desired recording magnification, said laser drive means being operated to emit a light beam of an intensity distribution having an effective recording radius of light capable of forming a recording image which corresponds to the selected radius for the light beam set by said aperture means.
Claim 3
Dependent Claim
65 words
A laser recording apparatus of claim 1, wherein said aperture means is interposed in a light path of the beam between the laser light source and the focusing means, said aperture means having a light stoppng member which is interposed variably across the light beam path to set the radius of the light beam to a selected radius in accordance with a desired recording magnification.
Claim 4
Dependent Claim
21 words
A laser recording apparatus of claim 1, wherein said aperture means is provided between the laser light source and the collimator.
Claim 5
Dependent Claim
20 words
A laser recording apparatus of claim 1, wherein said aperture means is provided between the collimator and the scanning means.
Claim 6
Dependent Claim
17 words
A laser recording apparatus of claim 1, wherein said aperture means is provided integrally with the collimator.
Claim 7
Dependent Claim
54 words
A laser recording apparatus of claim 1, wherein said improved means includes magnification selecting means connected to said aperture means and said laser drive means for controlling the light beam radius cooperatively with the light beam radius to obtain the desired recording magnification in response to a selection input to said magnification selecting means.
Claim 8
Dependent Claim
46 words
A laser recording apparatus of claim 6, wherein said laser light source is a semiconductor laser, and said laser drive means includes a semiconductor driving circuit for providing a driving current through the semiconductor laser, said circuit being controlled in response to said magnification selecting means.
Claim 9
Independent Claim
179 words
A method for selecting a recording magnification of a laser recording apparatus having a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, and a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, wherein the recording magnification is selected by correspondingly varying the radius of the light beam by the steps of: forming an aperture of a selected radius by aperture means interposed through which the light beam is directed, and driving the laser light source to emit a light beam of an intensity which is varied in accordance with the desired recording magnification, such that said laser light source emits a light beam of an intensity distribution having an effective recording radius of light capable of forming a recording image which corresponds to the selected radius for the light beam set by said aperture means.
Claim 10
Independent Claim
179 words
A method for selecting a recording magnification of a laser recording apparatus having a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, and a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, wherein the recording magnification is selected by correspondingly varying the radius of the light beam by the steps of: forming an aperture of a selected radius by aperture means interposed through which the light beam is directed, and driving the laser light source to emit a light beam of an intensity which is varied in accordance with the desired recording magnification, such that said laser light source emits a light beam of an intensity distribution having an effective recording radius of light capable of forming a recording image which corresponds to the selected radius for the light beam set by said aperture means.
Claim 11
Dependent Claim
50 words
A laser recording method of claim 8, wherein said aperture forming step includes providing said aperture means with a light stopping member which is interposed variably across the light beam path to set the radius of the light beam to a selected radius in accordance with a desired recording magnification.
Claim 12
Dependent Claim
153 words
A laser recording apparatus comprising: a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, improved means for selecting a recording magnification for an image formed on the photosensitive surface by selecting a corresponding radius of the light beam, and laser drive means for driving the laser light source to emit a light beam of an intensity which is varied in accordance with the desired recording magnification, said laser drive means being operated to emit a light beam of an intensity distribution having an effective recording radius of light capable of forming a recording image which corresponds to the selected radius.
Claim 13
Dependent Claim
153 words
A laser recording apparatus comprising: a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, improved means for selecting a recording magnification for an image formed on the photosensitive surface by selecting a corresponding radius of the light beam, and laser drive means for driving the laser light source to emit a light beam of an intensity which is varied in accordance with the desired recording magnification, said laser drive means being operated to emit a light beam of an intensity distribution having an effective recording radius of light capable of forming a recording image which corresponds to the selected radius.
Claim 14
Dependent Claim
139 words
A laser recording apparatus comprising a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, and an improved means for selecting a recording magnification including aperture means for forming an aperture of variable radius inteposed in the light path of the beam between the laser light source and the focusing means, said aperture means having a light stopping member which is interposed variably across the light beam path to set the radius of the light beam to a selected radius in accordance with a desired recording magnification.
Claim 15
Dependent Claim
139 words
A laser recording apparatus comprising a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, and an improved means for selecting a recording magnification including aperture means for forming an aperture of variable radius inteposed in the light path of the beam between the laser light source and the focusing means, said aperture means having a light stopping member which is interposed variably across the light beam path to set the radius of the light beam to a selected radius in accordance with a desired recording magnification.
Claim 16
Independent Claim
154 words
A method for selecting a recording magnification of a laser recording apparatus having a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, wherein said method comprises varying the recording magnification by varying the radius of the light beam, by the step of forming an aperture of variable radius inteposed in the light path of the beam between the laser light source and the focusing means, said aperture means having a light stoping member which is interposed variably across the light beam path to set the radius of the light beam to a selected radius in accordance with a desired recording magnification.
Claim 17
Independent Claim
154 words
A method for selecting a recording magnification of a laser recording apparatus having a laser light source for emitting a light beam, collimator means for making the beam parallel, scanning means for scanning the beam onto a photosensitive surface, focusing means for focusing the beam to form a spot image, a photosensitive surface onto which the spot image of the light beam is directed to form a latent image for transfer to a recording medium, wherein said method comprises varying the recording magnification by varying the radius of the light beam, by the step of forming an aperture of variable radius inteposed in the light path of the beam between the laser light source and the focusing means, said aperture means having a light stoping member which is interposed variably across the light beam path to set the radius of the light beam to a selected radius in accordance with a desired recording magnification.
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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |