Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1990-12-06
1992-08-11
Fuller, Benjamin R.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
G01D 1514
Patent
active
051383403
ABSTRACT:
A technique for producing pixel patterns at different selected wavelengths. A diode laser is repeatedly pulsed and has its temperature changed from pulse to pulse, which causes the output wavelength to change. This allows pixel patterns to be interlaced by the use of dispersive elements such as prisms in the optical train. A temperature shift of about 15.degree. C. provides a wavelength shift of about 30 angstroms, which is usable. A temperature shift of 20.degree. C.-30.degree. C. or more is preferable. The temperature shifts may be accomplished by supplying specific currents below threshold and above threshold. For two-wavelength operation, the laser is driven at a first bias current below threshold for a first non-illumination interval, at a first pulse current above threshold for a first illumination interval, at a second bias current below threshold for a second non-illumination interval, and a second pulse current above threshold for a second illumination interval. The bias currents are sufficiently different so as to establish different operating temperatures for the illumination intervals. The temperature shifts may also be accomplished at least in part by use of an auxiliary heater.
REFERENCES:
patent: 4281904 (1981-09-01), Sprague et al.
patent: 4369457 (1983-01-01), Sprague
patent: 4396252 (1983-10-01), Turner
patent: 4450459 (1984-05-01), Turner et al.
patent: 4514739 (1985-04-01), Johnson et al.
patent: 4673953 (1987-06-01), Hecht
patent: 4679057 (1987-07-01), Hamada
patent: 4701607 (1987-10-01), El-Hanany et al.
patent: 4815058 (1989-03-01), Nakamura et al.
patent: 4918681 (1990-04-01), Ikeda
patent: 4940314 (1990-06-01), Hecht
R. L. Thornton, "Impurity Induced Disordering of . . . ", SPIE vol. 797, Adv. Pro. of Semi. Devices, 1987, pp. 177-184.
R. L. Thornton, "Opto-Electronic Device Structures . . . ", JOCG 77, North-Holland Amsterdam, 1986, pp. 621-628.
R. L. Thornton, "High Power (2.1 W) 10-Stripe AlGaAs . . . ", Appl. Physics Ltrs., vol. 49, Dec. 1988, No. 23, pp. 1572-1574.
R. L. Thornton et al., "Highly Efficient Multiple Emitter . . . ", Appl. Phy. Ltrs., vol. 48, Jan. 1986, No. 1, pp. 7-9.
R. L. Thornton et al., "Low Threshold Planar Buried . . . ", Appl. Phy. Ltrs., vol. 47, Dec. 1985, No. 12, pp. 1239-1241.
R. L. Thornton et al., "Highly Efficient, Long Lived AlGaAs . . . " Appl. Phy. Ltrs., vol. 49, Jul. 1986, No. 3, pp. 133-134.
Robert A. Sprague, William D. Turner, Lawrence N. Flores; "Linear Total Internal Reflection Spatial Light Modulator for Laser Printing"; SPIE; vol. 299; 1982.
William D. Turner, Robert A. Sprague; "Advances in Laser Scanning Technology"; SPIE; vol. 299; Aug. 27-28, 1981.
Robert A. Sprague, William D. Turner, David L. Hecht, Richard V. Johnson; "Advances in Laser Scannning and Recording"; SPIE; vol. 396; Apr. 19-20, 1983.
Richard V. Johnson, David L. Hecht, Robert A. Sprague, Lawrence N. Flores, David L. Steinmetz, William Turner; "Characteristics of the Linear Array Total Reflection (TIR) Electrooptic Spatial Light Modulator for Optical Information"; Optical Engineering; Nov., Dec. 1983; vol. 22 No. 6; pp. 665-674.
Bernstein Mark S.
Hecht David L.
Kizer David E.
Kowalski Robert P.
Sprague Robert A.
Fuller Benjamin R.
Xerox Corporation
Yockey David
LandOfFree
Temperature controlled light source for interlaced printer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature controlled light source for interlaced printer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature controlled light source for interlaced printer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-349666