Electric lamp with absorbing and interference media

Details Electric lamp with absorbing and interference media Electric lamp with absorbing and interference media

2003-02-03

2008-11-18

Guharay, Karabi (Department: 2889)

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

C313S112000, C313S113000, C313S635000

Reexamination Certificate

active

07453190

ABSTRACT:
An electric lamp includes a lamp vessel which is transparent to visible light and accommodates a light source. The lamp vessel is covered with a combination of a light-absorbing medium and an optical interference film having layers of alternately layers of silicon dioxide and layers of a material with a comparatively high refractive index (e.g. ZrO2) . The reflection R of the interference film changes from 0.60≦R≦0.95 to 0.40≦R≦0.65 with a step ΔR in the range 0.2≦ΔR≦0.45, in a wavelength range 0.95×λtr≦λ≦1.2×λtr. In operation, the electric lamp emits colored light in the transmission mode and has a substantially color-neutral appearance in the off state.

REFERENCES:
patent: 6661164 (2003-12-01), Ruemmelin et al.
patent: 585701 (1983-01-01), None
patent: WO0120641 (2001-03-01), None
patent: WO0146718 (2001-06-01), None
Unpublished EP patent application 00204105.1 (PHNL000646), Apr. 20, 2001.

Affiliated with

Also associated with

Rating

Electric lamp with absorbing and interference media does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electric lamp with absorbing and interference media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric lamp with absorbing and interference media will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4034688