Military Review

Eye of Big Brother

15
Eye of Big Brother

In 1604, foreigners F. Lipperstey and Z. Jansen designed the first telescope, and in 1608, the first “Dutch pipes” appeared in Europe - spyglasses or telescopes.


The first significant successes in the unification of firearms weapons and the telescope was achieved by the Americans in the early 1800s. Copper telescopes were mounted on muzzle-loading "Kentucky" rifles of the 1812 model. According to rumors, on black powder they showed a group of 5 hits at 165 meters with a spread of 28 mm, which by today's standards corresponds to about 0,6 MOA at 100 meters.


Morgan-James rifle with a telescopic sight and a target hit from a distance of 200 meters, on the right - an enlarged target (on a stand above the butt)

Since then, optical devices have evolved greatly and have undergone a lot of changes, including in the glasses themselves.

In general, optical glasses can be made of any suitable chemical composition, but above all they must have a high degree of uniformity, purity, high transparency to the necessary visible and invisible spectral regions of light. For example, night vision devices require transparency to infrared radiation, and filters use an apochromatic coating to correct color reproduction.

quartz glass



Quartz glass is mainly used in devices that work with the visible light spectrum. It is obtained due to high-temperature melting of natural quartz crystals, high-purity sand, as well as non-natural pre-synthesized and thus enriched silicon-containing raw materials.

Due to the manufacturing method, quartz glasses have high thermal resistance and can be used up to 950 degrees Celsius, and the softening temperature can reach 1 degrees Celsius. At the same time, due to their low thermal expansion, they can be quickly heated and cooled without the risk of destruction due to thermal shock.

In addition, quartz glasses are quite inert to most substances, including the effects of almost all chemical acids. All these properties make it possible to use such glasses not only in aggressive environments, but also in complex devices such as beam splitters, cold and hot mirrors, and elements that mix radiation of different wavelengths.

For optical devices, quartz glass is good because it has the lowest refractive index among glasses based on silicon oxide and excellent light transmission, especially for ultraviolet rays.

silicon glass



On the one hand, this is ordinary glass, to which we are accustomed. On the other hand, thanks to the development of glass production and processing technologies, the use of abrasive tools and special grinding pastes, it became possible to produce hard and superhard optical glasses that combine ultrahigh isotropy (the same physical properties in all directions, invariance, symmetry with respect to the choice of direction), low dispersion index and the highest level of refraction.

Optical silicon is often obtained by the Czochralski method, when a single crystal is stretched and grown upwards. There are several types of this method, one of which produces crystals that are much cleaner, but also more demanding on the subsequent technological process, which in turn greatly increases the cost of production.

In general, optical silicon glasses are X-ray resistant, biologically compatible in medical applications, and are used in the manufacture of devices that work with the infrared spectrum.

Germanium glasses



Germanium dioxide is used in the manufacture of lenses, lenses, sensors, in thermal imagers, sea and land-based systems for panoramic observation of moving objects. Germanium glasses have a high density, high refractive index and thermal expansion, but are less hard compared to silicate glasses.

Germanium is water resistant and can be directly cooled with water. Its absorption rises sharply at temperatures exceeding 100 degrees Celsius, reaching opacity. Germanium glasses usually do not contain air bubbles and are more isotropic than silicate glasses.

In general, the field of application of optical germanium depends on the degree of doping and the type of crystal structure. An optical single crystal is grown by the Czochralski method and has a rather high cost.

Sitall glass



Sitall is a glass-ceramic material obtained by directional crystallization of various glasses during heat treatment. Roughly speaking, the physicochemical and physico-mechanical properties of such glasses depend on what was added during melting, they are divided into single-phase and multi-phase ones, depending on the number of crystallization phases. Light-sensitive additives (Au, Ag, Cu compounds) are usually used, which, when cooked and irradiated with ultraviolet light, impart those same special properties.

Such glasses are used in optics and light filters. High-strength glass-ceramics are used in antenna radomes. Transparent, heat-resistant, wear-resistant and chemically resistant glasses are used in space and laser technology, astro-optics, and solar batteries.

Optical soda silicate glasses



The most popular in the manufacture of optical devices are glasses, which have the common name of the crown. Glass with the addition of lead is called flint and has a higher refractive index than crowns. Both types of glass are used to reduce chromatic aberrations (image distortion due to the refraction of the medium through which light passes) and operate in the visible wavelength range. Magnifying lenses are made from crown, while reducing lenses are made from flint. For the final product, a specific type of glass is selected and the Abbe diagram is applied for the most common types of glass.

In coordinates, the dependence of the refractive index (nD) on the coefficient of dispersion of light (vD):


LK - light crown, FK - phosphate crown, TFK - heavy phosphate crown, K - crown, BK - barite crown, TK - heavy crown, STK - super heavy crown, KF - crownflint, LF - light flint, F - flint, BF - barite flint, TBP – heavy barite flint, TF – heavy flint, STF – super heavy flint, OK – special crown, OF – special flint

Results


I did not add the category of transparent ceramic lenses, because, apart from the information that the first lens with them was produced by CASIO, there is no other, in any way related to military use.

In general, despite the apparent simplicity of the topic at first, I had to face a number of difficulties in finding data. It is clear that optical glasses are actively used in military products, but which ones are extremely difficult to determine by eye, especially if there is sputtering. Most of the optical and laser systems, as well as complexes, are produced by the Shvabe holding, which is controlled by Rostec.

In 2011, the holding won a tender for the supply of binoculars with image stabilization to the Navy, which in 2016 will enter service - BKS 20x50. In addition, there is BDN-9S "Day-Night", which combines not only binoculars with a magnification of 14,5x, but night vision devices with an image intensifier tube 2+ and a magnification of 5x.

In addition to hand-held optics, we have recently been able to enjoy demonstrations of rocket science that could not have been achieved without advanced optics.


And yet, I am very worried about the fact that binoculars with a retail price of 200 rubles and rockets for millions of rubles are rather piece goods, and they are not capable of affecting the battlefield globally. At the same time, a cheap and mass-accessible reconnaissance tube for infantry has to be ordered from Chinese sites or looked for as a legacy from a more developed civilization.
Author:
15 comments
Ad

Subscribe to our Telegram channel, regularly additional information about the special operation in Ukraine, a large amount of information, videos, something that does not fall on the site: https://t.me/topwar_official

Information
Dear reader, to leave comments on the publication, you must sign in.
  1. WILL
    WILL 14 November 2022 06: 35
    +2
    In the production of high-quality optics, unfortunately Unfriendly countries are leading: Germany, Austria and the USA.
    Lenses and prisms in Russia are made of sufficient quality, but devices are not!
    1. Civil
      Civil 14 November 2022 07: 15
      +4
      At least simple pipes with stabilization should be mass-produced.
    2. KCA
      KCA 14 November 2022 09: 00
      +3
      There is such a Shvabe concern, so they make very good products, and they make optics, and the IR matrices themselves, when they participated in international exhibitions, they always received prizes for something, maybe there are not enough production volumes
  2. Nephilim
    Nephilim 14 November 2022 10: 09
    +4
    In 1604, foreigners F. Lipperstey and Z. Jansen designed the first telescope, and in 1608, the first “Dutch pipes” appeared in Europe - spyglasses or telescopes.

    Let's start with the fact that the name of the first inventor of the telescope is unambiguously unknown, as is the date of his invention. The first official documentary mention of a refractor telescope, that is, a telescope using a lens as an objective, dates back to 1608. On October 2, 1608, the Estates-General of The Hague received a 30-year patent for an instrument "capable of seeing distant objects as if they were nearby" by Johann Lippershey. A few weeks later, a similar application was submitted by Jacob Metius. They were denied a patent, in modern terms, "due to the lack of patentability criteria," since similar applications had already been filed earlier. As for Jansen, who was credited with the invention of the telescope in 1590 by William de Borel, this statement has not been confirmed and is considered doubtful.
  3. Nephilim
    Nephilim 14 November 2022 10: 30
    +4
    The first significant advances in combining firearms and telescopes were made by the Americans in the early 1800s. Copper telescopes were mounted on muzzle-loading "Kentucky" rifles of the 1812 model. According to rumors, on black powder they showed a group of 5 hits at 165 meters with a spread of 28 mm, which by today's standards corresponds to about 0,6 MOA at 100 meters.

    The "Kentucky rifles" of the 1812 model, with or without a telescopic sight, did not exist in nature. The first documented optical sight was invented and patented between 1835 and 1840 by John R. Chapman, a British engineer (Chapman-James telescopic sight). This sight was mounted on the rifles of the American arms manufacturer Morgan James. The photo in the article is just such a rifle, from which Lieutenant Holabird from West Point shot in 1860. The target he was shooting at is next to the rifle.
    1. Eule
      Eule 15 November 2022 12: 14
      +1
      Moreover, the word "sample" and "Kentucky rifle" are incompatible in the same sentence.
      The Kentucky Rifle is a TYPE of weapon made in the states of Pennsylvania and Kentucky by German-speaking Europeans. Its characteristics: Long barrel of small caliber with high quality workmanship, caliber less than 0.6 inches, as a rule, a long stock, up to a full one (to the muzzle, berg fitting), often descent with a shneller.
      In those days there were no "rules for the circulation of weapons", and anyone who knew how to make rifles made them. Who did not know how - could try and learn. The book "Rifles and Revolvers of the Wild West" gave an example of a certain priest who first repaired guns, and then learned to forge and drill barrels, and became a gunsmith, having stopped preaching, and began to make rifles.
      1. Nephilim
        Nephilim 15 November 2022 12: 33
        +1
        Moreover, the word "sample" and "Kentucky rifle" are incompatible in the same sentence.

        I missed this moment. The author has so many blunders that you can’t cover everything at once.
  4. Nephilim
    Nephilim 14 November 2022 10: 44
    +6
    "Quartz glass" is also "silicon glass" because both uses silicon dioxide. The author has a lot of technical and other errors. How did this article get on the site?
  5. Nephilim
    Nephilim 14 November 2022 13: 32
    +2
    I did not add the category of transparent ceramic lenses, because, apart from the information that the first lens with them was produced by CASIO, there is no other, in any way related to military use.

    Information about the military use of transparent ceramics in the sea - from night vision devices and thermal imagers to armored glass. Write not rewrite. The author clearly took up a topic from which he is very far from in all respects. Phrases about "difficulties in finding information" and determining the type of glass "by eye" are generally congenial.
  6. Duncan
    Duncan 14 November 2022 18: 30
    0
    "Silicon glass" - how is it?
    Monocrystalline silicon, by definition, is not glass.
    It would be more correct to write about some optical elements made of single-crystal silicon.
    Silicon oxide (quartz) is a glass-forming oxide.
    1. Nephilim
      Nephilim 14 November 2022 20: 04
      +2
      "Silicon glass" - how is it?

      The author undertook to write about what he has no idea about. Optical silicon is used, for example, for the manufacture of optical windows in the optical range from 3 to 5 μm. This is infrared radiation. Infrared homing heads of ground-to-air missiles or thermal imagers operate in this range. An optical window is not a lens. An optical window is a transparent, optically flat substrate that is used to separate two different media while still allowing light to pass through.
  7. Architect
    Architect 14 November 2022 20: 57
    0
    Why on the main photo of Medvedev to this topic?
  8. Zaurbek
    Zaurbek 14 November 2022 22: 56
    +1
    They even showed a domestic lens for Kenon, but they did not master stabilization.
    1. Eule
      Eule 15 November 2022 12: 17
      0
      Any Soviet threaded lens can be screwed into the Canon through an adapter, which is especially justified with Jupiter 85/2 and 135/2, since analogues are obscenely expensive. And with a series of EVIL, which are very seriously cheaper than Japanese lens televisions, and weigh much less.
  9. Knell wardenheart
    Knell wardenheart 15 November 2022 00: 26
    0
    Nice, good article!
    As for "cheap optics" - cheap optics in itself will be when they take care of the maximum introduction of domestic optics into most of what is produced in the country - up to some kind of flashlights. Because military orders are wonderful, but large-scale production under capitalism is mainly fattened from civilian products. In turn, an exclusively approach "to the national market" is a road to nowhere for most modern industries, you need to have a strategy for conquering the CIS markets at least. Behind all this there should be a very serious plan of action and state support - until this is done, you will have to "buy from the Chinese" because they have it.