Coating Specifications

Coatings for polymer optics have been optimized for wide band and narrow band anti-reflection spectra. Spectral photometry is used to ensure that all customer specifications and requirements of the products are met. Adhesion inspections are done with Kapton tape, and hardness inspections are carried out with muslin tests.

See above for a narrow band example showing an AR-coating optimized around a wavelength of 525 nm. In transmission mode the total loss off incident light is reduced by 50% at this wavelength. Currently Sumipro can measure wavelengths up to 1000nm; this will be expanded in the future to cover silicium and germanium coatings.

Mechanical properties  

• Materials tested so far: PMMA, PC and PET substrate materials
• Scratch test: depending on substrate used. In all cases the scratch resistance is better than the polymeric substrate surface.
• Adhesion test: the coating survives subsequent peel tests (3M scotch tape, tested area approx. 1 cm2, peel angle approx. 115º).
• Temperature test: withstands several temperature cycles including shocks of 75 ºC temperature difference. No delamination or cracking of the film was observed. (50 ºC to -25 ºC and -25 ºC to 50 ºC, instantaneously).

Protected Gold reflective coatings
We offer protected gold reflective optical coatings. All of our gold reflective coatings meet Military Specifications & all optical coatings are tested & inspected before being shipped.

Protected Silver Reflective coatings 

We offer protected silver reflective optical coatings. All of our silver reflective coatings meet Military Specifications & all optical coatings are tested & inspected before being shipped. We offer durable reflective coating with an average reflectivity of 97% from 500nm to 750nm and 98% from 800nm to out passed 10 microns.

Protected Aluminum reflective coatings

We offer protected aluminum (Al/SiO) reflective optical coatings. All of our aluminum reflective coatings meet Military Specifications & all optical coatings are tested & inspected before being shipped. We offer durable reflective coating with an average of >/=90%R in the visible region typically used for telescope mirrors.