Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1981-01-07
1984-01-17
Faber, Alan
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 45, 350432, G02B 2717
Patent
active
044266960
ABSTRACT:
An optical playback system for reading data from a record includes a focusing system for focusing a scanning light beam onto data on the record without need for precision positioning of the record and optical elements of the system. The light beam is modulated by the data and then transmitted to a light detector to produce a playback data signal corresponding to the recorded data. The focusing system includes a source of light having an axially symmetric intensity distribution and a lens designed to focus such light into a focal zone with a specified intensity distribution along the zone. This distribution is preferably uniform so as to provide the detector with a modulated light beam of uniform average intensity regardless of the position of the record along the focal zone. The lens is but one member of an entire family of nonconical, aspherical axicon-type focusing elements designed in accordance with a method described herein to focus energy from given source to a prescribed focal zone intensity distribution.
REFERENCES:
patent: 3501586 (1970-03-01), Russell
patent: 3558208 (1971-01-01), Hudson
patent: 4083272 (1978-04-01), Miller
patent: 4090031 (1978-05-01), Russell
patent: 4133600 (1979-01-01), Russell
patent: 4142209 (1979-02-01), Hedlund
"Linear, Annular, and Radial Focusing with Axicons and Applications to Laser Machining," Applied Optics, vol. 17, No. 10, pp. 1532-1536, May 15, 1978, M. Rioux, et al.
"Focons and Foclines as Concentrators of the Radiation of Extended Objects," Soviet Journal of Optical Technology, vol. 44, No. 2, Feb. 1977, pp. 66-69, V. K. Baranov.
"The Axicon . . . " Jour. of Opt. Soc. of Am., No. 44, pp. 592-597, Aug. 1954, McLeod.
"Imaging Properties of a Conic Axicon," Applied Optics, vol. 13, No. 8, Aug. 1974, pp. 1762-1764, Edmonds.
"Acoustical Interferometry Using Electronically Simulated Variable Reference and Multiple Path Techniques," Acoustical Holography, vol. 6, 1975, pp. 597-619, Collins.
"Methods for Increasing the Lateral Resolution of B-Scan," Acoustical Holography, vol. 5, 1973, pp. 391-413, Burckhardt.
"Ultrasound Axicon . . . " Jour. of Acoust. Soc. of Am., vol. 54, No. 6, 1973, pp. 1628-1630, Burckhardt.
Fundamentals of Optics, McGraw-Hill Pub., 1957, pp. 7-10, Jenkins et, al.
"Diamond Turning of Optics, " Optical Engineering, vol. 17, No. 6, Nov.-Dec., 1978, T. T. Saito.
"Precision Machining of Optics," Proceedings of Society of Photo-Optical Instrumentation Engineers, vol. 159, pp. 32-41, Aug. 1978, D. M. Miller, et al.
"Focal Depth of a Transmitting Axicon," Journal of Optical Society of Amer., vol. 63, No. 4, Apr. 1973, pp. 445-449, Lit.
Brenden Byron B.
Russell James T.
Digital Recording Corp.
Faber Alan
LandOfFree
Optical playback apparatus focusing system for producing a presc does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical playback apparatus focusing system for producing a presc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical playback apparatus focusing system for producing a presc will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-703386