Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1978-09-11
1980-04-08
Demeo, Palmer C.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313113, 313227, H01J 6122, H01J 6130, H01J 6140
Patent
active
041974808
ABSTRACT:
A reflector-type high-intensity-discharge vapor lamp unit having a generally parabolic rear reflector member is provided with a dichroic reflector carried as a coating on the inner surface thereof. The dichroic reflector selectively reflects visible light having a wave-length from about 400 to 750 nanometers and selectively transmits infrared radiation having a wavelength from about 750 to 1600 nanometers.
REFERENCES:
patent: 2830210 (1958-04-01), Jenne, Jr. et al.
patent: 2945146 (1960-07-01), Meyer
patent: 3174067 (1965-03-01), Bahrs
patent: 3288989 (1966-11-01), Cooper
patent: 3341731 (1967-09-01), Wilson
patent: 3527974 (1970-09-01), Cooper
patent: 3781586 (1973-12-01), Johnson
patent: 3931536 (1976-01-01), Fohl et al.
patent: 3974410 (1976-08-01), Collins et al.
patent: 4053809 (1977-10-01), Fridrich et al.
patent: 4109175 (1978-08-01), Watarai et al.
Bausch & Lomb Publication Entitled, "Bausch & Lomb Multi-films," particularly p.23 entitled Heat Control Filters, also contains graphs of transmittance vs wavelengths, on an additional page not numbered, for several types of filters.
DeMeo Palmer C.
Lombard R. S.
Westinghouse Electric Corp.
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