Shortpass Dichroic filters

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Shortpass Dichroic filters
  • ******@ifi.unicamp.br
  • 177.220.*.*
  • 2019-08-22 22:29:27
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Shortpass Dichroic filters2019-08-22 22:29:27
Good morning,
My name is Ettore Segreto and I am a professor at the University of Campinas in Brazil. I work in the Deep Underground Neutrino Experiment (DUNE) which will be one of the most relevant particle physics experiments of the next 10 to 20 years.
I am the leader of the Photon Detection System of the experiment, which is based on a novel technology, namely the ARAPUCA. It is a light trap and its core is represented by a short-pass dichroic filter. 
I see from your web site that you can probably produce the filters we need.

Our filters need to have the following characteristics:
Cutoff wavelength at 400 nm
Transparency > 90% between 350 nm and 400 nm 
Reflectivity > 95% between 400 nm and 500 nm
Angle of incidence: 45 degrees
Surfece flatness: not critical
Physical dimensions: 100 mm x 77 mm - Thickness 1mm or 2 mm
Substrate: fused silica or BK7 or B270

We will need to produce more than 100,000 of these filters for the detector

Could you please confirm that you are able to produce this filters and send a rough quote of the cost for 100,000 filters?
In case you are able to produce them I would be very interested in buying some samples of the filters.
Thank you in advance,

Ettore Segreto
Universidade Estadual de Campinas
Leader of the Photons Detection System of the DUNE experiment
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