Color and Color Measurement
Personally I like the "form follows function" design philosophy and like to make things as simple and as easy to use as possible given the functional task at hand.
Natural light is an important resource in this and I love spaces which are well designed around the use of daylight.
We (my wife and I) life in an Eichler home in the Bay Area in California.
Eichler homes belong to the category "mid-century" modern, and what I really like about our house is that it has an atrium, with glass walls from the bottom to the top,
and that also the back of the house has full glass walls as well.
The light effects in these houses change from hour to hour, from season to season, in inspire me every day.
But daylight is not around the whole day, and artificial light is needed in the evening, or in spaces where no access to daylight is possible.
Many aspects of artificial lights need to be taken into account for a good lighting design:
- The arhitecture and use of the space, and the change in use of the space dependening on time of day and season,
and changes due natural light.
- Light level or required intensity
- Contrast and shadows
- Glare from the fixtures
- Color and color rendering
- Impact of light on health, and the quality of sleep.
- And last but not least, the energy use of lighting
Very often we don't realize the importance of good light
, and a good light design
, but also the importance of darkness
during times of sleep.
Non Imaging Optics
- The principles of non-imaging optics design can be found in the Non Imaging Optics book,
written by Roland Winston, Juan C. Minano, Pablo G. Benitez, and with contributions by Narkis Shatz and John C. Bortz.
It mostly focuses on solar light collection, but the mathematics for solar applications is the same as for lighting applications.
- Working on fast technical raytracing through the power of my graphics processor in my display card by using CUDA. ♦♦♦
Technical or physical raytracing differs from raytracing for graphical applications in the precision and detail of the optical and material properties of the optical elements (objects) used as input,
and the required precision and presentation of the results.
Fior graphical raytracing the result is an image on a display, while for technical raytracing the results consists of physical quantities such as for example optical abberations, intensity distributions and spot sizes.
Publications, Patents, and Press
- Patents on which I am listed as an inventor issued in the US. Currently at 62 patents, but still more to come...
These are mostly about LEDs, light, and light control for automotive, displays, and general lighting.
- One-on-one Interview with Elizabeth Donoff in A.L Architectural Lighting Magazine.
Photography and Computer Graphics
Other Website Links
- Xicato Inc
I co-founded Xicato in 2007 together with Mark Pugh and Menko Deroos.
Xicato develops, manufactures and globally markets LED modules that simply are functional replacements for traditional lamp
technologies, offering all the life and energy-saving advantages of LEDs with no light-technical or aesthetic
compromises. Xicato is committed to address the whole broad sphere of the general illumination world, taking
on segment by segment with our annual new product launches. Xicato is being build by a team of outstanding
employees with diverse backgrounds that have a lot fun accomplishing amazing amounts of important work.
Information for Dutch citizens living in the San Francisco Bay Area (Informatie voor Nederlanders die in de San Francisco Bay Area wonen)
- Arjan's Home Page
- Elies's Home Page
- Eline Foundation
This foundation originated with the story of Eline, born in China and adopted in The Netherlands.
In 2007, Eline met her original family for the first time (see History). This meeting was a unique event, because Eline is the first adopted Chinese foundling (abandoned child) who has found her birth parents.
- Karina's Home Page