What are the applications of quartz glass in optical lenses?

The application of quartz glass in optical lens is as follows:

Lens material:

High transmittance: Quartz glass has good transmittance in a very wide spectrum from far ultraviolet (160nm) to far infrared (5μm), which can let more light through, reduce the loss and scattering of light, and thus improve the imaging quality and brightness of optical lens. In some special optical systems that need to capture ultraviolet or infrared rays, such as special spectral imaging lenses for scientific research and infrared monitoring lenses, this characteristic of quartz glass is particularly important.

Low dispersion characteristics: dispersion refers to the phenomenon that light with different wavelengths has different refractive indexes when passing through a lens, which leads to light dispersion. Quartz glass has a relatively low dispersion coefficient, which can better focus different colors of light on the same position, reduce the generation of color difference, and make the imaging clearer and the color more accurate. For example, in high-end photographic lenses and telescope lenses, the use of quartz glass lenses can improve the clarity and color reproduction of images.

Prism material:

High-precision optical performance: Quartz glass has good optical uniformity and uniform internal structure, so that the light passing through the prism can maintain good directivity and accuracy. In optical lenses, prisms are used to change the direction and angle of light propagation. For example, in the optical viewfinder of SLR cameras, quartz glass prisms can accurately reflect and refract light, so that users can clearly see the framing picture.

Good thermal stability: the optical lens may be affected by temperature changes during use, while quartz glass has high heat resistance and low thermal expansion coefficient, which can maintain good optical performance and dimensional stability when temperature changes, ensuring that the optical function of the prism is not affected.

Filter material:

Accurate wavelength selection: By coating or special treatment on the surface of quartz glass, various filters can be made to select light with specific wavelength to pass or block. For example, in laser system, quartz glass filter can accurately select the wavelength of laser, remove unnecessary stray light and improve the purity and intensity of laser; In astronomical observation equipment, the filter can select a specific celestial spectral band for observation.

High stability and durability: Quartz glass filter has good chemical stability and mechanical strength, which can be used in complex environment for a long time without being damaged or degraded, ensuring the stability and reliability of optical system.

Lens protection window:

Abrasion and scratch resistance: the optical lens is easy to be rubbed and collided by external objects during use. Quartz glass has high hardness, Mohs hardness can reach 7, and it has good abrasion and scratch resistance, which can effectively protect the optical elements inside the lens from damage.

Environmental corrosion resistance: Quartz glass has good corrosion resistance, can maintain good optical properties and appearance quality, and is suitable for various complex use environments, whether in harsh weather conditions or in corrosive gas or liquid environment.