초록 ▼

A lens mounted to a light emitting diode package internally redirects light within the lens so that a majority of light is emitted from the lens approximately perpendicular to a package axis of the light emitting diode package. In one embodiment, the light emitted by the light emitting diode package

A lens mounted to a light emitting diode package internally redirects light within the lens so that a majority of light is emitted from the lens approximately perpendicular to a package axis of the light emitting diode package. In one embodiment, the light emitted by the light emitting diode package is refracted by a sawtooth portion of the lens and reflected by a total internal reflection portion of the lens.

대표청구항 ▼

A lens mounted to a light emitting diode package internally redirects light within the lens so that a majority of light is emitted from the lens approximately perpendicular to a package axis of the light emitting diode package. In one embodiment, the light emitted by the light emitting diode package

A lens mounted to a light emitting diode package internally redirects light within the lens so that a majority of light is emitted from the lens approximately perpendicular to a package axis of the light emitting diode package. In one embodiment, the light emitted by the light emitting diode package is refracted by a sawtooth portion of the lens and reflected by a total internal reflection portion of the lens. dypup-offset=dypup-offset/dDpup(Dpup,y,decreasing)* dDpup. 15. The method of claim 14, comprising the steps of determining the location of the fixed reference point within the eyeball as expressed as the sum of the pupil location and the pupil-location offset: xfixed-ref-pt=xpup-loc+xpup-offset yfixed-ref-pt=ypup-loc+ypup-offset wherein the relationships: xfixed-ref-pt,yfixed-ref-ptrepresent the estimated location, within the camera image, of the fixed reference point within the eyeball and xpup-loc,xpup-locrepresent the location of the pupil within the camera image. 16. A method according to claim 1, wherein the steps are performed iteratively and said step of measuring observable features of the eye includes the step of measuring a pupil diameter. 17. A method according to claim 16, comprising the step of measuring the iris/sclera boundary of the eye. 18. A method according to claim 16, comprising the step of recognizing and locating a feature of the eye from the group consisting of: a blood vessel in the sclera, a feature of the iris/pupil boundary and a mark of the iris fiber pattern in proximity of the outer edge of the iris. 19. A method of using a computer system to quantify an eye's pupil-offset behavior, comprising the following steps: using an eyetracker system and the pupil-center-corneal reflection method to measure a first glint-pupil vector of the eye; fixating the eye on one or more given points on a screen; measuring at least one additional glint-pupil vect