In this time, let me show you a lighting module equipment for inspecting flaw before shipping large glass substrates.
We have a lot of experience which developed and manufactured beam projectors like Sayview, Ecoview etc in the past.
The core of this work was adjusting uniformity.
The total area is 15% uniformity of light illuminating an area of 2.2m * 2.1m.
When receiving an offer from the company, I initially think it would be not difficult because I have many experience dealing with lenses and front surface mirror.
However, I got to know how difficult it to make 85% uniformity in this extent area while conducting basic research prior to production.
< Manufacturing the same enclosures for exact test 6787>
< The first prototype 6720>
The first prototype was produced using Fresnel lenses. I used lense to solve a problem that field was tilted about 15 degrees.
< The second prototype 6865 >
I used a diffuser to increase uniformity.
It was a diffuser which is about 800 * 600mm.
I used two diffusers, transmissivity of first one is 85% and another is 90%, which developed by us.
< Final Product 6895>
< A photo before shipping the product 6898 >
It is composed of reflectors, optical mirrors, and three diffusers using four light source.
It nearly took a month to produce it. It was not easy, but worthwhile.
Question for optical products development
Myung Joong Kim, DIYPRO