Patent ID: 7312863
Filing Date: 2007-12-25
Classification: G02B

Abstract:
1. A light-emitting apparatus comprising: generating means for generating a beam of light; sensing means for sensing an undesired action of the generating means, wherein the sensing means includes one or more rate-sensing gyroscopes so that each gyroscope provides an output signal indicative of an angular velocity; and compensating means for compensating for the sensed undesired action so that the beam of light is projected on a target without any or substantially any undesired movement, wherein the compensating means includes integrating means for integrating angular velocity signal derived from the one or more gyroscopes to provide an integrated signal indicative of an undesired angular movement of the generating means; wherein the compensating means further includes a movable bellows positioned such that the beam of light generated by the generating means passes there through and having a solution therein with a refractive index of at least a predetermined value, and means for moving the bellows an amount which relates to the integrated signal so that the generated beam of light is projectable on the target without any or substantially any of the undesired movement.