About quartz window piece detailed introduction

The glass hardness of a single component of silicon dioxide can reach Mohs level 7, with high temperature resistance, low expansion coefficient, heat resistance, chemical stability and electrical insulation performance, and can pass ultraviolet and infrared. In addition to hydrofluoric acid and hot phosphoric acid, it has good acid resistance to general acids

Transparency is divided into transparent and opaque two categories.

According to purity is divided into high purity, ordinary and doped three categories.

Crystal, silica, silicide as raw materials, by high temperature melting or chemical vapor deposition, melting methods include electric melting, gas refining and so on.

Quartz glass is a non-quality material with a single component of silica, and its microstructure is a simple network composed of tetrahedral structural units of silica. Due to the large Si-O chemical bond energy and tight structure, quartz glass has unique properties, especially the optical properties of transparent quartz glass are very excellent. Excellent transmittance in the continuous wavelength range of ultraviolet to infrared radiation.

Silica glass uses high-purity silica sand as raw material, and the traditional method of production is melt-quenching method (heating the material to melting temperature, and then rapidly cooling to the solid phase of the glass); The production of ultra-high purity and ultraviolet transmittance transparent glass requires the vaporization of silicon, oxidation into silicon dioxide and heating and dissolution.

Materials

Quartz glass

Surface quality

60-40, 40-20, 20-10, 10-5 (optional)

Area accuracy

λ/2, λ/4, λ/10, λ/20 (optional)

parallelism

30 ", 10 "(optional)

Dimensional tolerance

+ / - 0.1 mm

Thickness tolerance

+ / - 0.05 mm

About window pieces

Window piece is one of the basic optical components in optics, is an optical plate that protects electronic components/sensors/semiconductor components in the optical path. The window piece does not change the magnification of the optical, and only affects the optical path in the optical path.

The main materials of the window plate include k9 optical glass, quartz glass, zinc selenide infrared optical material, calcium fluoride, silicon (Si), germanium (Ge).

K9 glass is also called K9 crystal, which can generally refer to glass products made of K9 material, used in optical coating and other fields. The transmittance, refraction effect, hardness and texture are much higher than the resin material. The main molding is cutting, polishing and pressing casting (requiring a furnace). K9 material belongs to optical glass, crystal clear, so derived a lot of K9 material as the processing object of the factory, they processed products, known as crystal glass products in the market. K9 glass is a kind of optical material with excellent performance, as the substrate of laser film, its characteristics and ability to resist laser damage directly affect the performance of high-power laser film, especially for laser anti-reflection, polarization film.

K9 consists of:

SiO2=69.13% B2O3=10.75% BaO=3.07% Na2O=10.40% K2O=6.29% As2O3=0.36%

Its optical constants are: refractive index =1.51630, dispersion =0.00806, Abbe number =64.06

(The national standard for optical glass is classified according to the Abbe number, the glass with the Abbe number ≥50 is specified as crown glass with "K", and the glass with the Abbe number < 50 is specified as flint glass with "F". In these two categories also use the light "Q"; Heavy "Z"; Special "T" and chemical element symbols with prefixes, numbers with suffixes are subdivided into 18 categories, 141 brands.)

Quartz is a special glass containing only a single component of silica, which can pass the far ultraviolet spectrum, which is better than all ultraviolet materials, and can pass the visible light and near infrared spectrum, and can be arbitrarily selected from the range of 185-3500m μm according to the need. Because the quartz glass is resistant to high temperature, the coefficient of thermal expansion is small, the chemical thermal stability is good, the bubble, the streak, the uniformity, the birefringence can be comparable to the general optical glass, so it is an essential optical material for working in a variety of harsh occasions with high stability optical system.