Browse Prior Art Database

Compact Video/ No Moving Parts

IP.com Disclosure Number: IPCOM000035989D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 3 page(s) / 46K

Publishing Venue

IBM

Related People

Hinkel, H: AUTHOR [+2]

Abstract

A read-only storage device is described that employs punched microholes in an opaque card. These holes are selectively illuminated from one side of the card, and the light spots are then detected by sensors on the other side of the card. The dimension of the combined matrix allows high density reading of video data without the space, cost and complexity of any moving parts. Data densities better than that of a compact video diskette are possible. THE DATA CARD

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Compact Video/ No Moving Parts

A read-only storage device is described that employs punched microholes in an opaque card. These holes are selectively illuminated from one side of the card, and the light spots are then detected by sensors on the other side of the card. The dimension of the combined matrix allows high density reading of video data without the space, cost and complexity of any moving parts. Data densities better than that of a compact video diskette are possible. THE DATA CARD

The data medium consists of an opaque plate 1 (Fig. 1) with lines 2 of precisely spaced holes 3 in precisely spaced rows 4. A hole represents "1", and an absence of a hole represents "0". The plate could be a layer of aluminium 5 a few molecules thick embedded in a plastic laminate 6. The holes 3 are punched through this layer by means of heavy ion bombardment. The holes will be as small as manufacturing reading resolution techniques permit and in the order of a few microns in diameter. After being written, a data or video card has been produced with holes through which light shines for data bits. A notch 7 in the plate is required for correct orientation and alignment in the writing equipment and the reading device. Separation distances of the holes and rows are equivalent to compact data bit resolution on video diskettes. The card can be written serially by existing pulsed beam such as cathode ray, laser or X-ray either in or out of vacuum, according to the type of beam selected as best to control and collimate.

The READER: The data card 5 is read by sandwiching it in close contact between a layer 8 (Fig. 2) of light-emitting stripes 9 on one side and a layer 10 containing rows of discrete light sensors 11 on its other side. The matrix intersections of light strips and sensors are at 90oto each other and separated either by holes for a "1" in the data card or by an opaque unpunched hole position "0". Photo lithographic techniques e...