Read-write head for an optical tape recorder

Details Read-write head for an optical tape recorder Read-write head for an optical tape recorder

1992-04-24

1993-06-01

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359210, 359821, 369 4418, 369284, G02B 2608

Patent

active

052165345

ABSTRACT:
The present invention provides a read-write head for an optical tape recorder comprised of a synchronized scanning transmissive polygon and rotating lens wheel. The transmissive polygon is a multi-sided piece of transparent optical quality material for displacing a through transmitted collimated read or write light beam. The lens wheel comprises a unitary disk-shaped piece of optical quality material having a plurality of individual lenses precision molded or diamond point turned therein for focusing the through transmitted and displaced read or write light beam onto a recording media. The polygon is rotated to translate the displaced beam for scanning along a linear path aligned with an arcuate path followed each successive lens on the rotating lens wheel. The rotation of the polygon and lens wheel are synchronized such that each scan of the displaced beam along the linear path coincides with the movement of a lens along the arcuate path to trace out a data track on the recording media. A pair of beam expanders are also provided in the read-write head as a demagnification-magnification system around the transmissive polygon to improve system performance by narrowing the diameter of the beam transmitted through the polygon.

REFERENCES:
patent: 1973203 (1934-09-01), Goldberg
patent: 3409348 (1968-11-01), Annis et al.
patent: 3891794 (1975-06-01), Russell
patent: 4090031 (1978-05-01), Russell
patent: 4273410 (1981-06-01), Menke
patent: 4320488 (1982-03-01), Russell
patent: 4321700 (1982-03-01), Russell
patent: 4426696 (1984-01-01), Brenden et al.
patent: 4495609 (1985-01-01), Russell
patent: 4514055 (1985-04-01), Grant
patent: 4588254 (1986-05-01), Menke et al.
patent: 4609259 (1986-09-01), Suemitsu et al.
patent: 4621892 (1986-11-01), Kataoka
patent: 4640573 (1987-02-01), Kataoka et al.
patent: 4689291 (1987-08-01), Popovic et al.
patent: 4737447 (1988-04-01), Suzuki et al.
patent: 4844568 (1989-07-01), Suzuki et al.
patent: 5159483 (1992-10-01), Watanabe et al.
S. Timoshenko et al., Theory of Elasticity, pp. 69-73 (2d Ed., 1951).
P. Cheo, Fiberoptics Devices and Systems, pp. 254-272 (1985).
M. Mansuripur, Analysis of Astigmatic Focusing and Push-Pull Tracking Error Signals in Magnetooptical Disk Systems, Applied Optics, vol. 26, No. 18, Sep. 15, 1987.
Optical Glass, product brochure from Schott Glass Technologies, Inc., dated 1987.
D. Begley et al., Aperture Shared Laser Diode Array Beam Combiner, Applied Optics, vol. 27, No. 13, Jul. 1, 1988.
K. Flood et al., Multiple Phase Level Computer-Generated Holograms Etched in Fused Silica, SPIE vol. 1052, Holographic Optics; Optically and Computer Generated (1989).
S. R. Perera et al., Flexible Optical Drive Technology, SPIE vol. 1078, Optical Data Storage Topical Meeting (1989).
D. Buralli et al., Optical Performance of Holographic Kinoforms, Applied Optics, vol. 28, No. 5, Mar. 1, 1989.
J. Jahns et al., Two-Dimensional Array of Diffractive Microlenses Fabricated by Thin Film Deposition, Applied Optics, vol. 29, No. 7, Mar. 1, 1990.

Affiliated with

Also associated with

Rating

Read-write head for an optical tape recorder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Read-write head for an optical tape recorder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Read-write head for an optical tape recorder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1818994