Abstract: An ultraviolet fluorescent lamp for accelerated artificial test on polymer is disclosed, which comprises a bulb consisting of an ultraviolet-ray-transmitting glass with the absorbance thereof having a wavelength of 280 nm being 1 to 3 with respect to ultraviolet rays, the inner surface of the bulb being provided with a phosphor having a characteristic that causes radiant energy transmitted through the bulb to increase by 5 to 17 times for every wavelength increase of 5 nm in a wavelength range of 295 to 310 nm, and that it has a radiant energy peak in a wavelength of 305 to 325 nm.
Type:
Grant
Filed:
March 2, 1988
Date of Patent:
August 22, 1989
Assignees:
Yoiti Minematu, Sankyo Denki Co., Ltd., Nichia Kagaku Kogyo K. K.