Photoflash lamp (Flash bulb) - Senkou denkyu (English spelling)

Japanese: せん光電球(閃光電球) - せんこうでんきゅう(英語表記)photoflash lamp
Photoflash lamp (Flash bulb) - Senkou denkyu (English spelling)
In the field of photography, it is also called a flash bulb. A light bulb that emits a large amount of light for a short period of time by sealing aluminum or zirconium wires and oxygen gas for combustion inside a glass bulb and passing electricity through it to illuminate the subject of a photograph. The outer circumference of the glass bulb is coated with a plastic film to prevent glass fragments from scattering and to correct the color temperature. The color temperature is 3800K for aluminum wires and about 4000-4400K for zirconium wires, and 5500K for color bulbs with a blue coating on the outer surface of the glass bulb.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
写真の分野では,フラッシュバルブflash bulbともいう。ガラス球内にアルミニウム,またはジルコニウムの細線と燃焼用酸素ガスを封入し,その通電によって,写真の被写体を照明するために,短時間に限って大きな光出力を発する電球である。ガラス球の外周には,ガラス破片の飛散防止と色温度補正のためのプラスチック皮膜が施されている。色温度はアルミニウム細線封入が3800K,ジルコニウム細線封入が約4000~4400K,カラー用はガラス球外面に青色の塗膜をつけ色温度が5500Kである。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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