Optical Materials–Optical Glasses

Optical glass is an amorphous(glassy) optical-medium material that can transmit light. After passing through it, light can change its propagation direction, intensity, phase, etc, and is commonly used in the production of optical elements such as prisms, lenses, mirrors, window sheets, and filters in optical instruments or optical systems.

Among them, in the ultraviolet band, the commonly used optical glasses are ultraviolet fused silica(UVFS). Commonly used quartz materials include domestic JGS1, JGS2, JGS3, Corning7980, and high-quality quartz glasses from Ohara(SK-1300, SK-1310, SK-1320L, SK-1321, etc). Our optical components generally use JGS1, which has a relatively high transmittance starting at 180nm.

Corning7980 has good uniformity and low bubble and impurity content, so it is mostly used in laser components and can provide a higher laser-included damage threshold. In the visible and near-infrared bands, commonly used optical glass materials include Schott’s N-BK7, float glass B270, and Chengdu Guangming’s H-K9L, etc.

N-BK7 and H-K9L have similar properties and can replace each other. They provide high transmittance in the visible and near-infrared(350nm-2.0um) ranges.