Focusing elements and system for producing a prescribed energy d

Details Focusing elements and system for producing a prescribed energy d Focusing elements and system for producing a prescribed energy d

Filed on

1983-10-14

Date issued

1985-10-08

Examiner

Corbin, John K.

Other Related Categories

G02B 1318

Type

Patent

Status

active

Patent number

045456534

Description

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 to 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: 2759393 (1956-08-01), McLeod
patent: 3501586 (1970-03-01), Russell
patent: 4083272 (1978-04-01), Miller
patent: 4090031 (1978-05-01), Russell
patent: 4133600 (1979-01-01), Russell et al.
patent: 4142209 (1979-02-01), Hedlund et al.
patent: 4356375 (1982-10-01), Josephy et al.
Saito, T. T.; "Diamond Turning of Optics"; Optical Engineering; vol. 17, No. 6; Nov.-Dec. 1978.
Miller et al; "Precision Machining of Optics"; Proc. of the Soc. of Photo-Opt. Instr. Eng.; vol. 159, pp. 32-41; Aug. 1978.
Rioux et al; "Linear, Annular and Radial Focusing with Axicons and Applications to Lasar Machining"; Applied Optics; vol. 17, No. 10; May 15, 1978; pp. 1532-1536.
Baranov, V. K.; "Focons and Foclines as Concentrators of the Radiation of Extended Objects"; Soviet Jour. of Opt. Technology; vol. 44, No. 2; Feb. 1977; pp. 66-69.
Lit et al; "Focal Depth of a Transmitting Axicon"; Jour. of the Optical Soc. of Amer.; vol. 63, No. 4; Apr. 1973; pp. 445-449.
Jenkins et al; Fundamentals of Optics; McGraw-Hill Publ.; 1957; pp. 7-10.
McLeod, J. H.; "The Axicon: A New Type of Optical Element"; Jour. of the Opt. Soc. of Amer.; No. 44; Aug. 1954; pp. 592-597.
Collins, H. D.; "Acoustical Interferometry Using Electronically Simulated Variable Reference & Multiple Path Techniques"; Acoustical Holography; vol. 6; 1975; pp. 597-619.
Edmonds, W. R.; "Imaging Properties of a Conic Axicon"; Applied Optics; vol. 13, No. 8, Aug. 1974; pp. 1762-1764.
Burckhardt et al; "Methods for Increasing the Lateral Resolution of B-Scan"; Acoustical Holography; vol. 5; 1973; pp. 391-413.
Burckhardt et al; "Ultrasound Axicon"; Jour. of the Acoustical Soc. of America; vol. 54, No. 6; 1973; pp. 1628-1630.

Affiliated with

Also associated with

Rating

Focusing elements and system for producing a prescribed energy d does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Focusing elements and system for producing a prescribed energy d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focusing elements and system for producing a prescribed energy d will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2216635