Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:


Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

RAINBOW / optical nutrition indicator


According to nutritionists, naturally color-vibrant foods serve an important role in keeping you healthy and even reducing cancer risks. I have created an optical nutrition indicator to help show users which fruits and vegetables are part of a colorful, healthy diet easily and interestingly. The indicator can sense colors of the vegetables and fruits eaten and project the colors onto the wall in means of rainbow-like light. The indicator includes two separate parts, the projector and the cutting board. The cutting board can hang above the projector which can be fixed on the wall.


Delft University of Technology

Delft University of Technology
Industrial Design Engineering
Delft, Netherlands

Jun Lin