摘要:
A fixed tint, photochromic glasses and sunglass lenses produced therefrom. The glasses have R2O—Al2O3—B2O3—SiO2 base compositions, contain silver chloride and bromide contents as photochromic constituents and 0.27-0.38% and 0.035-0.060%, both by weight percent, as glass colorants, the NiO:Co3O4 ratio being at least 6:1.
摘要翻译:由其制成的固定色调,光致变色眼镜和太阳镜。 该玻璃具有R2O-Al2O3-B2O3-SiO2基础组合物,其中氯化银和溴化物含量为光致变色成分,0.27-0.38%和0.035-0.060%(以重量百分比计)作为玻璃着色剂,NiO:Co 3 O 4比至少为 6:1。
摘要:
The photochromic compounds of the invention correspond to the formula: in which Th2 represents a bithienyl group in one of the positions 5 to 10 of the naphthenic ring system system, R1 denotes a bithienyl or trithienyl group and R2 denotes a bithienyl, trithienyl, aryl, naphthyl, thienyl, furyl, pyrrolyl or N-alkylpyrrolyl group.
摘要:
An ophthalmic, protective, filter lens, and a method of producing such lens, the lens having a ratio of Z and Y tristimulus values between 0.25-0.40, a dominant wavelength between 570-580 nm. on a color mixture diagram, a sharp transmission drop between 450-500 nm. and a transmission not over 30% between 400-450 nm.