NASA NTRS · 19960022397
Apparatus Would Position Bright Spot On Projection Screen
Abstract
Proposed apparatus aims beam of visible light at wavelength lambda(2) to create bright spot at desired position in image on projection screen. Intended to replace handheld laser and flashlight pointers lecturers sometimes use to indicate features in projected images. Beam of light cannot be inadvertently aimed toward audience.
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Rayman, Marc D.. 1996-05-01. Apparatus Would Position Bright Spot On Projection Screen. https://ntrs.nasa.gov/citations/19960022397
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