The Luminous Efficacy of an Incandescent Lamp Which has an Infrared Reflective Film
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- Shimogaki Kotaro
- R & D Division, Iwasaki Electric Co., LTD
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- Iwai Ikuo
- R & D Division, Iwasaki Electric Co., LTD
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- Yoshiike Hisao
- R & D Division, Iwasaki Electric Co., LTD
Bibliographic Information
- Other Title
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- 赤外線反射膜付き電球の効率
- セキガイセン ハンシャ マク ツキ デンキュウ ノ コウリツ
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Abstract
An energy conserving incandescent lamp which the infrared reflective film has been studied.<BR>This lamp can be called the heat mirror lamp, because it has an envelope internally coated with a multilayer heat refl ective mirror such as consisting of Ti02-Ag-Ti02.<BR>A theoretical formula which led the luminous efficacy and the energy conserving ratio of the lamp could be found.<BR>Those are depend on the spectral transmittance and reflectance of the heat mirror, the spectral emissivity of the radiator and the geometrical factor of the lamp components.<BR>In case of the spherical envelope lamp with tungsten coiled coil filament at the center, a geometrical factor of 0.63 has been experimentally obtained, and the luminous efficacy of 27 lm/W can be expected by using the Ti02-Ag-Ti02 film coated lamp.<BR>An experimental luminous efficacy of the lamp with a bulb internally coated with a thin gold film almost coincides with the results of theoretical calculations.
Journal
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- JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
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JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 68 (2), 72-76, 1984
The Illuminating Engineering Institute of Japan
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Details 詳細情報について
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- CRID
- 1390282679061691264
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- NII Article ID
- 130006765430
- 40004319529
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- NII Book ID
- AN00268860
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- ISSN
- 1349838X
- 21851506
- 00192341
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- NDL BIB ID
- 2971657
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed