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Browse Prior Art Database

Stereoscopic Pointer

IP.com Disclosure Number: IPCOM000112556D
Original Publication Date: 1994-May-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 86K

Publishing Venue

IBM

Related People

Liu, CN: AUTHOR [+2]

Abstract

Disclosed is a device for manually pointing at and discriminating between near and far objects in a presentation employing a stereoscopic 3-D display. The speaker is able to position the resulting displayed pointer image at any desired apparent depth, in addition to normal left-right and up-down positioning, so that the pointer image appears at the same position and depth, as seen anywhere in the audience. The apparatus is lightweight and completely contained in a hand held unit and includes a compensation so that the stereoscopic pointer image maintains the correct vertical spatial registration of the left and right elements if the speaker's hand twists inadvertently.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Stereoscopic Pointer

      Disclosed is a device for manually pointing at and
discriminating between near and far objects in a presentation
employing a stereoscopic 3-D display.  The speaker is able to
position the resulting displayed pointer image at any desired
apparent depth, in addition to normal left-right and up-down
positioning, so that the pointer image appears at the same position
and depth, as seen anywhere in the audience.  The apparatus is
lightweight and completely contained in a hand held unit and includes
a compensation so that the stereoscopic pointer image maintains the
correct vertical spatial registration of the left and right elements
if the speaker's hand twists inadvertently.

      The apparatus is shown in the Figure.  The left-eye and
right-eye pointers, (aL) and (aR), respectively, are mounted on
plates (bL) and (bR).  The plates are pivoted at (cL) and (cR) on a
subplate (d).  Subplate (d) is allowed to rock, via a pivotal shaft
(e), on the hand grip assembly (f).  A shaft (g) with a counterweight
(h) is attached to the subplate (d) and extends through a large hole
in the middle of the hand grip.  The hole is large enough to allow
the counterweight and shaft to sway.  The power supply (battery pack)
can serve as the counterweight.  A trigger (i) rides in a groove in
the grip assembly and has tabs through which the pivot shaft (e)
extends.  Between those tabs rides a slider assembly (j) on the same
pivot shaft.  Arms of the slider assembly fit through two slanted
grooves (kL) and (kR) on the plates (bL) and (bR) so that as the
slider assembly moves forward or backward, the forward ends of the
plates move apart or together, respectively.  These motions cause the
projected beams to separate or converge, respectively, to make the
pointer image appear further toward (or into) the screen or further
away from (or out of) the screen, respectively.  An adjustable slider
detent enables t...