Focussed light source pointer for three dimensional display

Details Focussed light source pointer for three dimensional display Focussed light source pointer for three dimensional display

1990-02-21

1991-06-18

Arnold, Bruce Y.

Optics: image projectors

Plural projection paths with single light source

353 10, 353 42, G03H 102

Patent

active

050244949

ABSTRACT:
The disclosure relates to a pointer for a three dimensional display wherein a scanned light beam is displayed upon a rotating display member rotating about a fixed axis for receiving and displaying the scanned light beam on a first surface thereof, fixed points in the display impinging upon the display member to display a harmonic motion along an axis passing through the scanned light beam in response to rotation of the display means. A beam of focussed light, preferably from a laser is modulated to synchronize with rotation of the display member to provide a visible point in the display at a predetermined location therein. A second embodiment provides an encoder, light conducting rod bundle and sensor to determine the three dimensional location of the point denoted by the pointer.

REFERENCES:
patent: 3233507 (1966-02-01), Baruch
patent: 4659172 (1987-04-01), Cavan
patent: 4834473 (1989-05-01), Keyes, IV et al.

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