Resources Contact Us Home
Irradiance-redistribution lens and its applications to LED downlights

Image Number 8 for United States Patent #7618162.

An illumination-redistribution lens comprising a thick aspheric lens collecting a high proportion of the luminous output of a compact LED with a quasi-hemispheric pattern. After receiving the highly nonuniform illuminance from the nearby LED, the lower surface refractively deflects these rays into a less diverging angular pattern that results in uniform illuminance on the upper surface of the lens, which itself is shaped so its distribution of slope angles refractively deflects the uniform illuminance distribution into an exiting beam that will produce uniform illuminance on a distant target, such as a table below a ceiling-mounted unit. When square-cut sections of such lenses are laterally arrayed to form a downlight, a uniform rectangular spot will be produced on the target.

  Recently Added Patents
Likelihood of mobile device portal transition
Preferential loading in data centers
Solar cell with structured gridline endpoints vertices
Mobile communication devices and location registration methods
Low voltage comparator circuits
Data processing apparatus and data processing method
Package carrier and manufacturing method thereof
  Randomly Featured Patents
Virtual resolution enhancement in diagnostic imaging using FEA
Curved-beam supporting structure for optical pickup actuators in optical disc drivers
Adjustable visual media mounting
Hole cleaning process for printed circuit boards using permanganate and caustic treating solutions
Feed-deviation preventive numerically controlled EDM method and apparatus
High resolution tomographic imaging method
Method for lowpass filter calibration in a satellite receiver
Mechanism for continuable calls to partially traverse a dynamic general tree