Optical: systems and elements – Deflection using a moving element – By moving a reflective element
Patent
1999-04-06
2000-07-25
Phan, James
Optical: systems and elements
Deflection using a moving element
By moving a reflective element
359224, 235462, G02B 2608
Patent
active
060942894
ABSTRACT:
An optical code reader comprises an integrated optical resonator that is disposed within a housing and that includes a substrate, a cantilever beam, and a bimorph actuator. The cantilever beam is affixed at one end to the substrate, and at least a portion of the cantilever beam has a reflective transmit surface on one side and a photodetector on an opposite side. The bimorph actuator is affixed to the cantilever beam and is responsive to an electrical stimulus to cause the cantilever beam to move in accordance with the stimulus. Movement of the cantilever beam causes the reflective surface to cooperate with a light beam generated by a light source to provide a spot of light that moves on a code pattern, and also causes a field of view of the photodetector to be dynamically altered such that the photodetector tracks movement of the moving spot of light. Additionally, the code reader also comprises a reflective collection surface having a conical shape, and the photodetector is located approximately at a focal point of the reflective collection surface. The combination of these features permits a high signal-to-noise ratio to be achieved, so that the code reader exhibits superior operating characteristics as defined by long read range and large depths of field. The disclosed optical code reader is structurally reliable, low cost and small size, has improved scalability, has minimal power requirements, and uses only a minimal number of discrete components.
REFERENCES:
patent: 3758199 (1973-09-01), Thaxter
patent: 3902783 (1975-09-01), Bodlaj
patent: 4385798 (1983-05-01), Yevick
patent: 4436364 (1984-03-01), Lauer et al.
patent: 5015831 (1991-05-01), Eastman et al.
patent: 5170277 (1992-12-01), Bard et al.
patent: 5198651 (1993-03-01), Barkan et al.
patent: 5295014 (1994-03-01), Toda
patent: 5329103 (1994-07-01), Rando
patent: 5596446 (1997-01-01), Plesko
patent: 5614706 (1997-03-01), Bard et al.
patent: 5629510 (1997-05-01), Quinn et al.
patent: 5691834 (1997-11-01), Plesko
Article: "Nippon Signal Brings Blue-Laser Advance to Light" (Electronic Engineering Times Nov. 1998).
Article: "Miniaturized Systems with Micro-Optics and Micromechanics III" by M. Edward Motamedi and Rolf Gooring (Jan. 1998) SPIE The International Society for Optical Engineering, vol. 3276, pp. 66-80.
Article: "Development of Micro-Electro-Mechanical Optical Scanner" by Motamedi et al. (May 1997) Opt. Eng. 36(5) pp. 1346-1353.
Article: "MEM's The Word For Optical Beam Manipulation" by K.Y. Lau (Circuits & Devices, Jul. 1997) pp. 11-18.
Andrews Angus P.
Garcia-Nunez Dawn S.
Jinar Daniel J.
Moranski Jeffrey A.
Motamedi Manouchehr Edward
Durst Jay G.
Gerasimow A. M.
Horn John J.
Phan James
Rockwell Technologies LLC
LandOfFree
Method and apparatus for optical code reading using a MEM optica does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for optical code reading using a MEM optica, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for optical code reading using a MEM optica will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1340694