Patent ID: 7508512

Claim:
A system that facilitates correcting misalignment in a light curtain, comprising: a back-lit LCD that selectively permits light from an emitter to pass through transmissive apertures generated on the LCD; a first lens that focuses light that has passed through the transmissive apertures on the back-lit LCD to generate the light beam that traverses a monitored area; a second LCD that selectively permits a light beam that has traversed the monitored area to pass through transmissive apertures generated on the second LCD to a receiver; a second lens that re-focuses the light beam at an opposite side of the monitored area prior to passing through the transmissive apertures on the second LCD; and a control component that provides feedback information to at least one of the LCDs to adjust a position of the transmissive apertures generated thereon when the light beam is determined to be misaligned.