SU808395A1 - Optical quartz glass - Google Patents

Description

The invention relates to the manufacture of optical glass, namely, doped silica glass, and can be used in optical instrument making as filter elements. Known glass l, including, wt.%: Fe2O 0.1-3 Na-iP 0.1-2 SiOa Else The closest technical solution to the proposed is high silica glass, containing, wt.%: Si02 94-99, 4 / 0.5-3.0 and 0.1-3.0, in which the introduction of additives AEzOe and, provides opacity in the UV spectral region. These glasses do not have selective light transmission. The purpose of the invention is to obtain optical quartz glass with selective light transmission. in the spectral region of 400–700 nm, i.e. absorbing UV and near IR and transmitting the visible spectrum. The goal is achieved by the fact that the glass incorporates SiO,, and additionally contains Pe2. Oz and in the following ratio of components, weight.%: SiO2, 93.2-95, 9; AP2 0-% 0.5-1.5; Spruce 0.5-1.5; FejOi 0.10, 3; NajO 3.0-3.8. Additional addition of oxides and NajO to glass composition absorbs the radiation lying in the near infrared region of the spectrum. Aluminum oxides and europium, introduced into silicon dioxide at concentrations of 0.5-1.5 wt.%, Are absorbed in the UV region of the spectrum. Iron, introduced in an amount of 0.1-0.3 wt.% In the form of oxide, in the presence of alkali (3.0-3.8 wt.%) Is reduced to the bivalent state, which determines the absorption in the near IR region spectrum. In the absence of alkali, the reduction of iron does not occur and iron in the trivalent form makes a major contribution to UV absorption (see examples, 1803 and 1807, Tables 1 and 2). The reduction of iron to the divalent state is further facilitated by the deposition of glass in a hydrogen atmosphere. Glass, which contains SiOj, AEjO-j, and Na2O, absorbs only in the UV region.

Table 1 shows the compositions of the proposed optical quartz glass in comparison with the known.

The spectral light transmission data of the prototypes of the glass compositions given are summarized in Table. 2

High-silica glasses containing SiO in their composition and have elect (The light transmittance is in the region of 400-700. Such specimens, having an intense green color, are deposited from diatomite-based silica. The introduction of alloying additives into silica is produced during synthesis Glass is deposited in a hydrogen atmosphere at a pressure of 0 atm at 1680 ° C.

Developed formulations can be used in laser devices. Experimental samples

SiOg Ae20 ,, Fe20

1758 - famous

96.5 1.0 Suggested:

Bach {including high power) with active elements on neodymium for the purpose of isolating the second harmonic of stimulated emission (530 nm).

Offered alloy windows. They can also be used in experimental practice in devices with powerful light sources when studying the luminescence of various objects as light filters transmitting excitation light in the region of 400-700 nm.

Unlike light filters based on multicomponent glasses with similar transmission characteristics (such as ZS8, ZS10), a quartz filter has a high thermal stability and can operate in harsh temperature conditions.

Table 1

Content, wt.%

2.5 claims Optical quartz glass, including SiO, and Eu2O, characterized in that, in order to ensure the absorption of y4 and near-infrared regions of the spectrum and the transmission of 5 visible regions, it additionally contains Fe2O3 and in the following ratio of components, weight. %: SiOa93.2-95.9 AbgOz0.5-1.5 0.5-1.5, 1-0.3 Nato3.0-3.8. “Pin T ™“ “formations taken into account during the examination 1. USSR author's certificate 191075, cl. From 03 On 3/06, 1965. 2. USSR inventor's certificate 268617, cl, From 03 On 3/06, 1968.

Claims (1)

Claim Optical quartz glass, including SiO ₂ , AEjOg and Ey2 ° 3 »πη4, furthermore, in order to ensure absorption of the UV and near infrared regions of the spectrum and transmittance of the visible region, it additionally contains Fe ₂ Oj and Na ₂ O in the following ratio of components, wt.%: SiOi 93.2-95.9 Ab2.Oz 0.5-1.5 Eu ^ O-j 0.5-1.5 Fe ₂ O ^ 0.1-0.3 Na ₂ O 3.0-3.8