US4297713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser recording apparatus
Assignee: Canon Inc
•
Filing: 1979-05-29
•
Granted: 1981-10-27
•
Expires: 1999-05-29
Abstract
Abstract A laser recording apparatus includes a laser optical unit having an integral combination of a laser for emitting a laser beam and an optical system for converting the laser beam into an expanded and collimated beam; a deflector unit for directly receiving the laser beam emergent from the laser optical unit and directing the laser beam toward a recording medium; a photoreceptor unit having an integral combination of a reflecting member for reflecting the laser beam deflected by the deflector unit and a photoreceptor for receiving the laser beam reflected by the reflecting member; a support member having standard portions respectively for mounting the laser optical unit, the deflector unit and the photoreceptor unit.
Inventors
- 👤 Junji Ichikawa
- 👤 Nobuhiro Imai
- 👤 Kimio Kohno
- 👤 Koichi Kadokura
- 👤 Masaaki Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:53
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/022; H01S5/02208; B; B41; B41J; B41J2/00; B41J2/435; B41J2/47; B41J2/471; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1204; H01S5/024; H01S5/02407; H01S5/02415; H04; H04N; H04N1/00; H04N1/024; H04N1/032; H04N1/036
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
139 words
A laser recording apparatus, comprising: laser means comprising a laser element for emitting a laser beam; optical means supporting said laser means, said optical means receiving the laser beam therefrom at an entrance end and emitting a collimated laser from an exit end thereof, said optical means being provided with a mounting standard face, wherein the difference between the distance of the laser element from said standard face and the distance of the entrance end from said standard face are maintained within the focal depth of said optical means even in the presence of a temperature change; a support member comprising a mounting standard face on which is affixed said mounting standard face of said optical means; and deflector means for directly receiving the laser beam from said optical means and directing said laser beam toward a recording medium.
Claim 2
Dependent Claim
139 words
A laser recording apparatus, comprising: laser means comprising a laser element for emitting a laser beam; optical means supporting said laser means, said optical means receiving the laser beam therefrom at an entrance end and emitting a collimated laser from an exit end thereof, said optical means being provided with a mounting standard face, wherein the difference between the distance of the laser element from said standard face and the distance of the entrance end from said standard face are maintained within the focal depth of said optical means even in the presence of a temperature change; a support member comprising a mounting standard face on which is affixed said mounting standard face of said optical means; and deflector means for directly receiving the laser beam from said optical means and directing said laser beam toward a recording medium.
Claim 3
Dependent Claim
21 words
An apparatus according to claim 1, further comprising a cover encircling a space between said laser means and said optical means.
Claim 4
Dependent Claim
63 words
A laser recording apparatus according to claim 1, wherein said laser means and optical means are constructed of materials having thermal expansion coefficients which ensure that the difference between the distance of the laser element from said standard face and the distance of the entrance end from said standard face are maintained within the focal depth of said optical means during temperature changes.
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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |