Patent ID: 7703922

Claim:
A scanning laser opthalmoscope apparatus for projecting a two-dimensional pattern of visible light of variable power output level onto the retina of an eye comprising the elements of: a laser source means for emitting a beam of light with a wavelength in the visible range; a modulating means for rapidly changing the intensity of the laser source means to the variable power output level; a scanning means including fixed optical elements, a first scanning element for producing a vertical scanning of the beam of light, and a second scanning polygon element comprising a multitude of mirror facets for producing a horizontal scanning of the beam of light; an electronic means for controlling and fixing the vertical scanning of the laser source means in a predetermined vertical direction and for turning off the second scanning polygon element; an electro-mechanical lever means comprising the elements of: a rod shaped element with an end tip; a shaft for accommodating the rod shaped element, wherein the shaft anchored to the scanning laser opthalmoscope apparatus; a means for moving the end tip of the rod within the shaft towards the multitude of mirror facets and the moving means for further causing rotation of the multitude of facets to a preferred direction, whereby a radiometer positioned outside of the scanning laser opthalmoscope can measure the variable power output level in the preferred direction independent of a duty cycle of the two-dimensional pattern of visible light when the beam of light is not scanning.