The company also licenses : delay ( AAC-LD ), multichannel spatial audio with echo cancellation and interference filters to eliminate feedback from mobile devices, and inter-operation with legacy video conferencing.
22.
A Cleveland research firm, the Freedonia Group, has predicted the US market for radio interference filters to shield vulnerable components will grow 30 percent by 2000, to $ 650 million annually.
23.
The company is among a handful in the country that manufacture optical interference filters, the glass filters that help certain microscopes and telescopes filter light, and provided filters for the Hubble space telescope.
24.
The fines resulted from ITT's outsourcing program, in which they transferred night vision goggles and classified information about countermeasures against laser weapons, including light interference filters to engineers in Singapore, the People's Republic of China, and the United Kingdom.
25.
Atomic line filters are superior to conventional dielectric optical filters such as interference filters and Lyot filters, but their greater complexity makes them practical only in background-limited detection, where a weak signal is detected while suppressing a strong background.
26.
For instance, the polarizers used in the actual Faraday filter don't block most radiation, " because these polarizers only work over a limited wavelength region . . . a broad band interference filter is used in conjunction with the Faraday filter ".
27.
Atomic line filters are superior to conventional dielectric optical filters such as interference filters and Lyot filters, but their greater complexity makes them practical only in background-limited detection, where a weak signal is detected while suppressing a strong background . ( "'more . . . " ')
28.
The physics of the etalon and the dichroic interference filters are essentially the same ( relying on constructive / destructive interference of light reflecting between surfaces ), but the implementation is different ( a dichroic interference filter relies on the interference of internal reflections while the etalon has a relatively large air gap ).
29.
The physics of the etalon and the dichroic interference filters are essentially the same ( relying on constructive / destructive interference of light reflecting between surfaces ), but the implementation is different ( a dichroic interference filter relies on the interference of internal reflections while the etalon has a relatively large air gap ).
30.
This concept was pioneered by Duro-Test in 1980 with a commercial product that produced 29.8 lm / W . More advanced reflectors based on interference filters or photonic crystals can theoretically result in higher efficiency, up to a limit of about 270 lm / W ( 40 % of the maximum efficacy possible ).
