US5305337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser controller
Assignee: Pentax Corp
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Filing: 1992-03-10
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Granted: 1994-04-19
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Expires: 2012-03-10
Abstract
Abstract A laser beam controller having a laser beam emitter for emitting a laser beam and a beam receiver which receives the laser beam emitted from the laser beam emitter and outputs a light receipt signal corresponding to a signal level of the laser beam. The laser controller includes a reference signal outputting device for outputting a reference signal in accordance with an environmental humidity of the laser controller. A comparator compares the light receipt signal of the light receiver with the references signal. A control device controls the output of the laser beam emitter in accordance with the comparison result of the comparator.
Inventors
- 👤 Yoshiyuki Araki
- 👤 Hiroto Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:49
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S5/00; H01S5/06; H01S5/068; H01S5/0683; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1204; G06K15/1209; G06K15/1214
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
93 words
A laser controller, comprising: means for emitting a laser beam; means for receiving said laser beam emitted by said laser beam emitting means, said receiving means outputting a receipt signal that corresponds to a power level of said laser beam; means for outputting a reference signal in accordance with an ambient humidity surrounding said laser controller; means for comparing said receipt signal of said light receiving means with said reference signal; and means for controlling an output of said laser beam emitting means in accordance with a comparison result of said comparing means.
Claim 2
Dependent Claim
93 words
A laser controller, comprising: means for emitting a laser beam; means for receiving said laser beam emitted by said laser beam emitting means, said receiving means outputting a receipt signal that corresponds to a power level of said laser beam; means for outputting a reference signal in accordance with an ambient humidity surrounding said laser controller; means for comparing said receipt signal of said light receiving means with said reference signal; and means for controlling an output of said laser beam emitting means in accordance with a comparison result of said comparing means.
Claim 3
Dependent Claim
40 words
The laser controller of claim 1, wherein said control means controls a power of said laser beam emitted by said laser beam emitting means so as to make said receipt signal of said receiving means coincidental with said reference signal.
Claim 4
Dependent Claim
36 words
The laser controller of claim 1, wherein said laser beam emitting means comprises a laser head having a laser diode and a driver that supplies said laser diode with electric current to drive said laser diode.
Claim 5
Dependent Claim
53 words
The laser controller of claim 2, wherein said control means varies said power of said laser beam emitted by said laser beam emitting means to make said receipt signal of said receiving means coincidental with said reference signal when said receipt signal of said receiving means is not identical to said reference signal.
Claim 6
Dependent Claim
32 words
The laser controller of claim 1, further comprising means for adjusting said output of said laser beam emitting means to a predetermined reference value that is dependent on a reference ambient humidity.
Claim 7
Dependent Claim
34 words
The laser controller of claim 5, wherein when an ambient condition shifts from said reference ambient humidity, said reference signal outputting means varies said reference signal in accordance with said shift in ambient condition.
Claim 8
Dependent Claim
35 words
The laser controller of claim 6, wherein said controlling means controls said output of said laser beam emitting means so as to make said receipt signal of said receiving means coincidental with said reference signal.
Claim 9
Dependent Claim
27 words
The laser controller of claim 7, wherein said controlling means controls said output of said laser beam emitting means prior to a commencement of a laser scanning.
Claim 10
Dependent Claim
25 words
The laser controller of claim 1, wherein said reference signal outputting means comprises a humidity sensor for detecting said ambient humidity surrounding said laser controller.
Claim 11
Dependent Claim
27 words
The laser controller of claim 9, wherein said reference signal outputting means outputs a reference signal that corresponds to said ambient humidity detected by said humidity sensor.
Claim 12
Dependent Claim
39 words
The laser controller of claim 10, wherein said reference signal outputting means outputs reference signals to vary a power level of said laser beam when said ambient humidity detected by said humidity sensor varies from a predetermined reference value.
Claim 13
Dependent Claim
24 words
The laser controller of claim 11, wherein said comparing means comprises a comparator to which said reference signal and said receipt signal are inputted.
Claim 14
Dependent Claim
64 words
The laser controller of claim 12, wherein said reference signal outputting means outputs said reference signal to vary said power level of said laser beam when said ambient humidity detected by said humidity sensor is higher than said predetermined reference value, and wherein said controlling means increases said power level of said laser beam emitting means until an output of said comparator is inverted.
Claim 15
Dependent Claim
64 words
The laser controller of claim 13, wherein said reference signal outputting means outputs said reference signal to decrease said power level of said laser beam when said ambient humidity detected by said humidity sensor is lower than said predetermined reference value, and wherein said controlling means decreases said power level of said laser beam emitting means until an output of said comparator is inverted.
Claim 16
Independent Claim
87 words
An apparatus for controlling an electrophotographic device, comprising: a laser that emits a beam of light; a photodetector that detects said emitted light beam to obtain a power signal related to a power level of said emitted light beam; a humidity sensor that determines an ambient humidity surrounding said laser to obtain a reference signal; a comparator that compares said reference signal to said power signal; and a controller that controls said power level of said emitted light beam based upon a comparison result of said comparator.
Claim 17
Independent Claim
87 words
An apparatus for controlling an electrophotographic device, comprising: a laser that emits a beam of light; a photodetector that detects said emitted light beam to obtain a power signal related to a power level of said emitted light beam; a humidity sensor that determines an ambient humidity surrounding said laser to obtain a reference signal; a comparator that compares said reference signal to said power signal; and a controller that controls said power level of said emitted light beam based upon a comparison result of said comparator.
Claim 18
Dependent Claim
21 words
The apparatus of claim 15, wherein said reference signal varies in accordance with said ambient humidity determined by said humidity sensor.
Claim 19
Independent Claim
106 words
An apparatus for controlling a printing density of an electrophotographic device, comprising: a laser that emits a beam of light; means for detecting a power level of said emitted beam of light; means for setting a reference signal; a comparator that compares said reference signal to said detected power level; and a controller that controls said power level of said emitted light beam based upon a comparison result of said comparator to control a print density of said electrophotographic device, wherein said reference signal setting means comprises a humidity sensor that varies said reference signal based upon a detection of an ambient humidity surrounding said laser.
Claim 20
Independent Claim
106 words
An apparatus for controlling a printing density of an electrophotographic device, comprising: a laser that emits a beam of light; means for detecting a power level of said emitted beam of light; means for setting a reference signal; a comparator that compares said reference signal to said detected power level; and a controller that controls said power level of said emitted light beam based upon a comparison result of said comparator to control a print density of said electrophotographic device, wherein said reference signal setting means comprises a humidity sensor that varies said reference signal based upon a detection of an ambient humidity surrounding said laser.
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) | 1997-04-18 | 1997-10-18 | 1998-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-18 | 2001-10-18 | 2002-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-18 | 2005-10-18 | 2006-04-19 | $7700.00 | Window Closed / Lapsed |