Edge-blackening
Why are we doing this? Because we have been dealing with the printing of optical components for many years!
The aim is to apply a light-absorbing layer outside the optically effective area (circumferential surface/aperture) of optical components by means of edge blackening in order to minimise stray light.
Benefits & Advantages
- from a stand-alone system up to a process-integrated solution in your production
- short set-up times
- variable lens diameters - adapted to your requirements
- integrated UV-dryer ensures abrasion-resistant ink application
- and many more
Fields of application
- Stray light minimisation
- Reflex avoidance
- False light suppression
- Traceability
- Contrast enhancement
- Signal-to-noise ratio
User
- Optic manufacturer
- Sensor technology
- Camera manufacturer
We have achieved this
- Oursystem is a fully functional semi-automatic prototype.
- Series models are configured according to customer requirements, for example with several print heads, additional drying and similar
- Protection of utility models was granted by the German Patent Office on April 17, 2017.
- Climate tests are commissioned
- Transmission and reflection measurements are commissioned
- Additional axes and print heads are currently being constructed
- Possibilities of a UV solution are currently being investigated
- We are looking forward to your requirements and your feedback!
More information can be found here › https://www.mwib.de/news/2016/randschwaerzen-und-kennzeichnen-auf-optiken/
State of the art - Status Quo
There is a strong desire to automate the edge-blackening of optical components.
However, state of the art is the manual application of quick-drying liquid lacquers, mostly based on ethanol, with a brush or ink-writer.
The lenses are mounted on a rotating table with vacuum suction or plug-in chuck.
A considerable disadvantage is that an increasing variety of shapes and decreasing production lot sizes stand in the way of a high degree of automation.
This is made more difficult by the use of a large number of coatings, whose property spectra vary greatly due to the different chemical bases.
At the Fraunhofer IOF in Jena, several experiments for the automated application of edge-blackening for this process have been developed and tested for possible industrial applications.
Scattered light in the optical system.
How does stray light arise in the optical system?
- Scattering on non-ideal surfaces
- Reflections from optically ineffective surfaces
- Reflection & scattering at effective optical surfaces
How can it be avoided?
- Use of iris plates is only possible to a limited extent due to lack of space
- Geometry of the optically effective surfaces and radii is often at the expense of optical performance
- Blackening of lens edges makes sense and is usually only a question of cost
"Our developers work every day to open up new fields of application for the automatic system and to increase its effectiveness - also for YOUR range.
An employee's development work is financially supported by funds from the State of Thuringia and the European Social Fund."
You need more detailed information - a personal contact person?
We will visit yout you to demonstrate and explain the ODMuv 50|1 !