Robert F Bartolini

US Patent:

40554236, Oct 25, 1977

Filed:

Apr 15, 1976

Appl. No.:

5/677437

Inventors:

Robert Alfred Bartolini - Trenton NJ
Allen Bloom - East Windsor NJ

Assignee:

RCA Corporation - New York NY

International Classification:

G03C 504

US Classification:

96 27H

Abstract:

Permanent thin-phase holograms are recorded wherein the recording medium contains a recording layer comprised of an olefinically unsaturated negative photoresist polymer containing an. alpha. -diketone.

US Patent:

40323404, Jun 28, 1977

Filed:

Apr 10, 1975

Appl. No.:

5/566705

Inventors:

Allen Bloom - East Windsor NJ
Robert Alfred Bartolini - Trenton NJ
Herbert Alfred Weakliem - Pennington NJ

Assignee:

RCA Corporation - New York NY

International Classification:

G03C 504
G03C 158

US Classification:

96 27H

Abstract:

The sensitivity of organic volume phase holographic recording media comprising an. alpha. -diketone in an acrylic polyester polymer can be improved by heating the recording media during or after recording.

US Patent:

43152694, Feb 9, 1982

Filed:

Aug 29, 1977

Appl. No.:

5/828815

Inventors:

Allen Bloom - East Windsor NJ
Sidney S. Seffren - Philadephia PA
Alan E. Bell - East Windsor NJ
Robert A. Bartolini - Trenton NJ

Assignee:

RCA Corporation - New York NY

International Classification:

G01D 1534

US Classification:

3461351

Abstract:

An optical recording medium comprises a light reflecting material which is coated with a light absorbing layer and overcoated with a 0. 05-1 millimeter thick layer of an optically transparent and chemically and thermally stable material such as a silicone resin. During recording, portions of the light absorbing layer are ablated or melted by a modulated focussed light beam, thereby exposing portions of the reflecting layer while leaving the overcoat layer intact. Information is recorded in the form of a reflective-antireflective pattern. Dust particles and other surface contaminants settle on the upper surface of the overcoat layer, so far removed from the focal plane of the recording lens that their effect on the recording or playback signal is considerably reduced, and no defect is noticeable on the playback monitor.

US Patent:

41953126, Mar 25, 1980

Filed:

Feb 24, 1978

Appl. No.:

5/880759

Inventors:

Alan E. Bell - East Windsor NJ
Robert A. Bartolini - Trenton NJ

Assignee:

RCA Corporation - New York NY

International Classification:

G01D 1534
G11B 700
H04N 576

US Classification:

1791001G

Abstract:

An optical record blank structure comprises a disc-shaped substrate (e. g. , glass), a layer of light-reflective material (e. g. , aluminum) overlying a surface of the disc-shaped substrate, a coating of a transparent material (e. g. , silicon dioxide) overlying the light-reflective layer and a coating of a moderately absorptive material (e. g. , an organic dye such as fluorescein) overlying the dielectric coating. The coating parameters are chosen to establish an antireflective condition to a recording light beam incident on the disc surface. The transparent coating thickness is selected such that the transparent coating is optically passive to the recording light beam, i. e. , the thickness of the transparent coating is selected to be an integer multiple of the half-wavelength of the recording light beam wavelength in the transparent material. With this structure the efficiency of energy coupling into the absorptive coating is enhanced by the antireflective condition, the reflective surface of the substrate and the thickness of the transparent coating.

US Patent:

41218817, Oct 24, 1978

Filed:

Jul 2, 1976

Appl. No.:

5/702196

Inventors:

Robert Alfred Bartolini - Trenton NJ
John Patrick Russell - Pennington NJ

Assignee:

RCA Corporation - New York NY

International Classification:

G02B 2700

US Classification:

350 367

Abstract:

A primary recording medium simultaneously receives a pair of reference beams, one of which is comprised of rays that are parallel to an axis of rotation of the primary medium. The primary medium is incrementally rotated about the axis after each of a plurality of object beams is transmitted in sequence thereto from a fixedly disposed source. Interactions between the object beams and the reference beams are recorded in the primary medium as volume holograms, whereby a primary record is recorded. Reconstructions of the object beams and corresponding reference beams emanate from the primary record in response to a primary reconstructing beam. An interaction between the reconstructions is recorded as a volume hologram in a secondary recording medium whereby a secondary record is recorded. A reconstruction of a selected one of the object beams emanates from the secondary record in response to a secondary reconstructing beam.

US Patent:

40226182, May 10, 1977

Filed:

Apr 10, 1975

Appl. No.:

5/566706

Inventors:

Robert Alfred Bartolini - Trenton NJ
William Joseph Burke - Princeton Junction NJ
Allen Bloom - East Windsor NJ

Assignee:

RCA Corporation - New York NY

International Classification:

G03C 504

US Classification:

96 27H

Abstract:

Organic volume phase holographic recording medium comprising an. alpha. -diketone in an acrylic polyester polymer is desensitized by exposing the medium to desensitizing light after recording is complete. This inactivates the. alpha. -diketone and prevents damage to the medium during readout.

US Patent:

42186897, Aug 19, 1980

Filed:

Jan 30, 1978

Appl. No.:

5/873612

Inventors:

Allen Bloom - East Windsor NJ
Robert A. Bartolini - Trenton NJ

Assignee:

RCA Corporation - New York NY

International Classification:

G01D 1534

US Classification:

3461351

Abstract:

An ablative recording medium comprises a substrate coated with a light reflecting layer which in turn is coated with a light absorptive layer of 6,6'-diethoxythioindigo. During recording, portions of the light absorptive layer are ablated by a modulated focussed light beam, thereby exposing portions of the reflecting layer. Video information is recorded as a reflective-antireflective pattern.

US Patent:

45689520, Feb 4, 1986

Filed:

Dec 10, 1984

Appl. No.:

6/679864

Inventors:

Jonathan I. Gittleman - Lawrenceville NJ
Robert A. Bartolini - Robbinsville NJ

Assignee:

RCA Corporation - Princeton NJ

International Classification:

G01D 1534
G11B 724

US Classification:

3461351

Abstract:

A multi-layer optical record blank and information record comprises a light-reflective layer, a light-transmissive layer, a light-absorptive layer, and a heat-sensitive information layer wherein the thicknesses of the layers are chosen to achieve a low-reflection condition. Information is recorded as variations of an optical property in the information layer indirectly heated by light absorbed in the absorptive layer.