Browse Prior Art Database

Two- and Three-Dimensional Image Display

IP.com Disclosure Number: IPCOM000038808D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 75K

Publishing Venue

IBM

Related People

Hartwig, R: AUTHOR

Abstract

To permit the display of both two- and three-dimensional images on the rotating helix of a display system, the helix is shortened such that its vertical projection does not cover a full circle. Through the resultant wedge, a laser beam may also write a two-dimensional image on the front face of the imaging space without impinging upon the helix. The partially perspective and sectional view of German Patent 26 22 802 shows a stationary transparent hollow cylinder 1, made of glass, which is arranged concentrically to axis 2. Within hollow cylinder 1, a display screen 3, shaped as a single helicoidal surface (helix), is arranged concentrically to and rotatably about axis 2 in the direction marked by arrow 4. Display screen 3 is clamped in a container 5 which is open at one end and positioned concentrically to axis 2.

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Two- and Three-Dimensional Image Display

To permit the display of both two- and three-dimensional images on the rotating helix of a display system, the helix is shortened such that its vertical projection does not cover a full circle. Through the resultant wedge, a laser beam may also write a two-dimensional image on the front face of the imaging space without impinging upon the helix. The partially perspective and sectional view of German Patent 26 22 802 shows a stationary transparent hollow cylinder 1, made of glass, which is arranged concentrically to axis 2. Within hollow cylinder 1, a display screen 3, shaped as a single helicoidal surface (helix), is arranged concentrically to and rotatably about axis 2 in the direction marked by arrow 4. Display screen 3 is clamped in a container 5 which is open at one end and positioned concentrically to axis 2. Container 5 is transparent and made of glass. Display screen 3 is translucent and made of acrylic glass. Container 5 along with screen 3 forms a rotor 6 which is pivotally connected to pivot bearing 7 and rotatably driven by drive 8. Beam 10, emanating from a controlled black-white switchable laser 9, is directed sharply focused and parallelized onto stationary mirror 12 mirroring beam 10 into axis 2. Beam 10 impinges on a beam deflector 13 deflecting the beam according to polar coordinates across all elements of a circular deflection face 14. An optical lens system 15 passes the deflected beam, realigning it in a direction parallel to axis 2. Beam 10 impinges on display screen 3, generating an image point 17. In this manner, image points may be generated at any arbitrary point inside containe...