SOV - PNV-57

Binocular infrared PNV- 57 is designed for drivers of automobiles , tracked and wheeled artillery tractors , amphibious automobiles , tracked amphibious transporters and motor tugboats at night .
Infrared device for car drivers works on the principle of using reflected infrared rays . The headlights of the vehicle with infrared filters emit a beam of infrared rays on the road, the observed terrain . Part of these rays are reflected from the road (the observed terrain) and the objects that are on it . The lens of the infrared instrument concentrates the reflected infrared rays that have fallen on it and creates on the photocathode of the electro-optical image converter , an infrared inverted image of the road and objects .
The photocathode consists of a layer of semi-transparent special substance deposited on the inside of the electro-optical image converter. This layer emits electrons from the irradiated points , with the amount of electrons emitted from each point being directly proportional to the irradiation intensity of that point . In this way, the photocathode converts the infrared image into an electron image. This means that in an electro-optical image converter, the infrared image is first converted into an electron image ( on the photocathode ) and only then is this converted into a visible image (on the shield).
This visible image is similar in appearance as well as in brightness distribution to the observed object (the road and objects on it).
The observer does not observe the image of the object directly on the shade , but only through the eyepiece . The necessity of using an eyepiece is that the lens and the electro-optical image converter on the shade are very small . In order to create a normal perception of the observed object in the eye , the shade is observed with an eyepiece , which magnifies the image to normal size . In the PNV -57 infrared instrument there are two electro-optical arrays , one for each eye. This arrangement of the observation systems is called binocular . It creates a certain spatiality of the image , thus achieving a true perception of the observed objects . The disadvantage of this infrared instrument is that it uses an illuminating body , headlights , a vehicle with infrared filters , which emit a beam of infrared rays to operate. It is an active device in its operation is easily detectable by the means of the adversary .
This apparatus , but in the modification of the designation PNV -57 DP is also used for drivers of engineer transport vehicles and for vessel transport . It differs in that it is supplemented by a special infrared illuminator and its fixing device , which are housed in a special housing .


PNV -57 infrared light source accessories:


- low voltage cable
- high voltage cable
- supply cable
- infrared filter
- sensing frames
- box with sealant
- replacement joint parts
- lens covers
- infrared instrument
- hood
- high voltage power supply
- crate
- recorder

Technical parameters:
field of view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30°
magnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1x - 1.2x


Maximum resolution:
center of field of view . . . . . . .. . . . . . . . . . . . . . . . . . . 35 lines per min.
eyepiece diopter adjustment . . . . . . . . . . . . . . . . . . . . . +- 4 diopters


Voltage : input . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V or 24V
Output . . . . .. . . . . . . . . . . . . . . . . . . . . . 14kV - 19kV
weight of the kit in the housing . . . . . . . . . . . . . . . . . . . . . . 9.3 kg
infrared radiation source . . . . . . . . . car headlights
(BVP with infrared filters)
fixing point . . .. . . . . . . . . . . . . . . . . . . . on the back of the hood


Basic technical data of the infrared lamp:
axial luminous intensity (with diffusing glass) . . . . . . . . . . . . . . . 127 550cd
scattering task :
Vertical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3° to 4°
horizontally . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10° to 11°
radiation source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
wattage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100W
diameter of reflecting mirror . . . . . . . . . . . . . . . . . . . . . . . 250mm

In addition to the above-mentioned variants, there was also a variant PNV-57H or Night Vision Device 57 patrol. It was a technical means of research (TPPz) included in the lowest units of all-army and in-depth research.
PNV-57H did not have a characteristic "hood", only a kind of woven cap (detachable, the device could be used as a "telescope" held in the hands) with a net, the source box was hung on a belt and the device could be connected to the vehicle's onboard network.

The pictures show the complete PNV-57, ie a set with a transport and storage box, spare parts, black reflector glass, answering machine, etc. (picture 1), detail of attaching your own device to the hood - don't be fooled, the device is lifted into " marching positions "- ie the eyepieces turned forwards (frame 2), detail of the suspension of the source box/voltage transmitter in the rear part of the hood (frame 3) and the" air variant "PNV-57E for helicopter crews, attached to the helmet shell (frame 4 .).

For completeness:
these need illumination, without it being minimally visible, residual light will not help much here, so they were always used with an additional IR reflector:
PNV-57 (for drivers, on the "tank" hood, powered from the vehicle's mains, converter on the hood)
PNV-57H (patrol, battery source with a converter in a metal box on the belt, power supply from the vehicle network impossible, had no "cap", only a strap for hanging around the neck, firmly connected to the infrared headlight, the same as the NSP-2)
PNV-57DP (mounted on the helmet, fixed headlight, converter on the helmet, power supply on the belt)
And he doesn't necessarily need this light, he used another more leaky type of EOP:
PNV-57E (powered only from the on-board network), "tank" hood with the possibility of adding headphones, with high voltage converter at the rear, usually green hammer color
I will add a view via Simrad (GN2-XD4) later, I would not confuse them in this description at all.

I would like to ask what about these devices?


I understand the activity described in the first post.
then here the stick mentions the version of the PNV-57H, with which I also had personal experience in the war. it was something like a classic PNV-57, it just had a reflector directly on the body. And here it bothers me the first thing, so I remember well so I'm through it saw at night even if the ir reflector was not turned on. only when I turned it on, then I saw a little better. just as if I had lit up, but as I write I think it went without it, so I'm interested in how it is.
and other things mentioned. e version for helicopter pilots. if I know the aircraft has no ir headlights like bvp, so I'm interested in how it worked there. driver.

Tomas3127: I have a feeling that the PNV works on the principle of residual light. Exactly the same as the PNV-57E.

For Tomas 3127: All PNVs work on the principle of using residual light, respectively in its infrared spectrum, but in a band close to visible light. Thus, they do not work with IR thermal radiation of lower frequency, like thermal imaging devices.
All PNVs can be divided into so-called generations, according to the degree of maturity of the electro-optical transducer used, which is inserted between the optics and the eyepiece (screen), or the display on which the observed image is projected:

O.generation:


They began to be manufactured and used just after World War II. s. cylinders and could not work without illumination by reflector IR light (so-called active IR devices). They were used mainly as devices for shooting at night from various weapons.


Generation I:


These are devices that no longer necessarily need an auxiliary source of IR radiation, but for better visibility and use in deep darkness, the auxiliary source can be used and is supplied with the device.


The disadvantage of the 0th and 1st generation devices is the fact that the converters used in them are prone to damage in the case of direct light lighting (blind).


II. generation (passive IR devices):


As a rule, they no longer need an auxiliary source of IR radiation even in great darkness (but it can be used) and their transducers usually can withstand spot light in the field of view. PNVs of this generation are currently the most widespread in all armies and can be found on all means of combat, including aircraft and helicopters.
They are also supplied as combined instruments for observation in various modes and modes, especially in combination with thermal imaging for searching and aiming various targets with reduced visibility.


III. generation:


They can work reliably in almost complete darkness and at the same time even in conditions where the intensity of external lighting changes, for this purpose they have the so-called "Autogating". Another significant feature is the high resolution and sharpness of the image.
PNV of this generation currently has only the US Army and probably the Army of the Russian Federation.


IV. generation: it is just before the end of development, but no details are known yet.


The mentioned division is only general, there are still subgenerations, especially 1+. generation and 2 + .generation, but the differences are not significant.
PNV-57 is a typical representative of I. generation devices.

I dare to disagree as there are (albeit in limited quantities) PNV A/N PVS-14 monoculars (according to the American classification gen.3 +) and Simrad GN-2 XD4 binoculars (which, in turn, the manufacturers claim, are available). gen.3) ))

AN/PVS-14 and AN/PVS-21. Yes, it is possible that they are already in the arsenal of other armies. When it comes to differentiation, the line between generations is sometimes difficult to distinguish.
Thank you for the information

Simrad GN2 XD4? As far as I know, the XD4 (Leica BIG 35 XD-4) should be residual light amplifiers and the spectacle designation is SIMRAD GN-2HP (in addition, we also have the SIMRAD KN-252F and SIMRAD KN-252B devices). I came across the designation SIMRAD GN II XD-4 only in materials submitted to the government - the question is whether they are terminologically correct.

So the certificate says: night observation device SIMRAD GN2-EO converter XD-4 (60lp/mn), I wrote it from home and I had the certificate at work )))

That's fine - depending on what's on the certificate, there are 2 devices.


I wrote the designation of the devices that have an officially assigned VČM in the Armed Forces of the Slovak Republic and appear in the code lists of the material.

So I don't see it again, but in the book vz.1 we have a few pieces of GN2-EO and a few pieces of GN2-XD4. So I think they are two devices and both are in the USSR. The first ones were supplied for BVP drivers.

Interesting. I also didn't find anything in the VČM report on the intranet. Either there is an incomplete overview, incorrectly issued transfer documents, or materialists have no idea what has been bought into the Armed Forces of the Slovak Republic over the years.

Before I think nevedia ones is rozdiel medzi týmito PNV..

Hi .. I know this is an old fiber but I'll try.
I got a PNV-57e phased out of the Slovak Army .... but when the army phased them out, they devalued them by breaking both axles.

However, it is said that these socks should still be obtained from someone who is still serving.
Can anyone help me with this?
Thank you

I don't want to spoil any illusions for you, but it has a few "hooks":
- exchange piece by piece no longer works in the army for maybe 20 years, this applies to almost everything.
- the one who would exchange them for the damaged ones would have to reimburse the consequential damage, and it is always several times higher in the army than the one in the civilian, not counting any year-end rewards, etc ... because every single item or equipment has someone signed and taken over - this is called material responsibility
- you don't just choose lenses, you need a key for optics and sometimes even unpacking of the sleeves, and not every department has a capable optician-mechanic, let alone jigs
- after replacing the lenses, or eop, it is always necessary to adjust the stool and adjust with a jig, this applies to every optician, although it may not seem so, the eye is partially different, but adapts poorly adjusted binoculars and infra-instruments (especially binoculars) can already in a few minutes you get tired of your eyes by risking a minimum quality headache, but those who have not experienced this will not understand.
So you better look for a non-functional somewhere from ebay, bazocha and the like and put one together from two ... and you'll still find a few in civilian who will set it up for you, because there's nothing wrong with that. And the price of the setting for a pro in this case is probably more than the price of the optics itself.

I didn't write about the piece, but about the lenses, you still want to exchange them piece by piece. I repeat: Even if there were spare lenses in stock, no one will just replace them with you, because you cannot exchange something new for damaged in the warehouse without the appropriate documents and statements, as a result there would be damage that would be paid by the person responsible for material responsibility. Or it would be necessary to give it officially, as the repair was done, but the repair is also signed and approved by someone, and the specific piece (serial number) that was being repaired must be stated. This is already a carousel of people and papers - and no one in their right mind can blame this. Next, the replacement of the optical part, resp. disassembly of any optics is advised at least for a medium repair and an order is usually made in a repair company ... So it will not be in ordinary warehouses somewhere in the barracks either. Also, your claim that PNVs are not used is not based on the truth.
Sorry, but obviously you have no idea how it works in the army and its warehouses, piece by piece and the bottle has not been valid for several decades ...
Try ebay, or some advertising portal, because here and in the military it doesn't matter.
EOP converters were made only by TESLA Vrchlabí and Rožňov
Only Meopta did optics in Czechoslovakia and consisted in its secondary races.