Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1994-03-14
1995-01-10
Epps, Georgia Y.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359201, 359221, 359196, 372 24, 348202, 348203, 348207, 348294, G02B 2608
Patent
active
053812581
ABSTRACT:
A laser projection system for projecting an image onto a surface comprises a laser projector operably connectable to a computer. The computer controls the operation of the system. The laser projector comprises a laser beam source for generating a laser light beam, a collimator comprising a focusing leans for focusing the laser light beam to a focal point, a collimating lens for collimating the laser light beam beyond the focal point and a wedge-shaped lens having an apertured interposed between the focusing lens and collimating lens. The aperture has a size for passing the laser light beam therethrough. Two scanners direct the light beam about a light path. A photo sensor receives light refracted by the wedge-shaped lens and generates a feedback signal. A plurality of target reflectors, each having a retroreflective material for retroreflecting light back to its source. The laser light beam is projectable in a predetermined pattern and if the laser light beam is retroreflected back to the laser light source, the retroreflected laser light beam is refracted by the wedge-shaped lens towards the photo sensor for generating a feedback signal for the computer. The plurality of target reflectors comprises a plurality of mountable targets for removably mounting on the surface. Upon striking the mountable targets with the laser beam, the photo sensor generates a plurality of feedback signals for establishing spatial coordinates of the mountable targets. The plurality of target reflectors further comprises a moveable target for inserting in the light path of the laser beam while projecting the image. Upon striking the moveable target with the laser beam, the photo sensor generates a feedback signal for limiting the area of projection of the image.
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Bordignon Richard M.
Rueb Kurt
Wieczorek John
Epps Georgia Y.
Fors Arne I.
Horne D. Doak
Imai Jeffrey T.
Virtek Vision Intelligence Robotics Technologies Corporation
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