Method and apparatus for projecting an optical projection...

Details Method and apparatus for projecting an optical projection... Method and apparatus for projecting an optical projection...

2011-07-12

2011-07-12

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Methods

C606S005000, C219S121640

Reexamination Certificate

active

07976174

ABSTRACT:
In a method for projecting at least one optical projection onto at least one projection surface a monitoring zone that contains and/or surrounds a first projection surface is scanned with the aid of a working laser beam, which is not hazardous for the human eye, by the positioning the working laser beam on various scanning positions located in the monitoring zone, and a measured signal for light from the working laser beam that is reflected from the scanning positions is acquired. The measured signal is compared with the reference signal. Depending on the result of this comparison, the optical projection is projected onto the first projection surface by means of a projection laser beam, which has a greater radiant power than the working laser beam. With the aid of the working laser beam, a second optical projection is projected onto a second projection surface that is located outside of the monitoring zone.

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