We did a research as follows.
First of all, selected optimum LEDs and mixed it for higher CRI, target CCT and illuminance.
The following step is optical module design. Light directional characteristics of dental lighting must be concentrated to
illuminate a part. Because This part is oral cavity, The feature of illumination pattern is rectangular. For uniformity of
illuminance and clearer pattern boundary at reference distance, we designed it as direct type (no use reflector) by
imaging optic technique. First, Image is rectangular feature, so object must be the same feature with magnification in
general imaging optics. But the emitting surface feature of LED (1W grade) is square or circular generally. For that
reason, made object as rectangular source with rectangular lightguide. This optical component was designed for higher
efficiency by illumination optic technique. Next, we designed optical lenses based on imaging optic technique for image
object feature using Code V. set to high NA for light efficiency in this design. Fundamentally, Finally, This product is
luminaire so illumination simulation and result analysis were executed by LightTools as illumination design software.