AN/PVS-4 Starlight Scope

Night Vision Sight, Individual Served Weapon

© Brooke Clarke 2012
AN/PVS-4 Starlight Scope,
          Night Vision Sight, Individual Served Weapon

Background
Description
    Reticule
        Lamp
        Insert
    Mount
    FN FAL
Manuals
Battery Caps
Related
Links


Background

Got this as a basis for developing a battery adatper.  This night vision scope uses the same BA-5567/U battery as the PVS-5 Night Vision Goggles, but the cap threads on this scope are male and also different from those on the PVS-5 so they require different battery adapters.

Wiki lists these variants: AN/TVS-5, AN/PVS-8, AN/PVS-20, NVS-700, NVS-800, Auto NVS-1, Auto NVS-2, NVS-T 700, NVS-T 800, IWS NL-84, NL-87, NL-89, Star-Tron, MVM-4, ITT F4960.  I don't know if these have the same battery cap?

When the 95mm objective of the PVS-4 replaced with a 155 mm objective it's then called the TVS-5. Note the larger objective has more than twice the area so the ranges for the TVS-5 are more than double those of the PVS-4.

Description

This is a early version made for use in Israel.  It has provision for 2 batteries to be mounted. One of them is fitted with an add-on duuble AA battery adapter.
The night vision tube works. 

The optics appear to be of the Cassegrain reflector (Wiki) design.  This has big advantages when working with visible light in addition to infrared light because there's no chromatic abberation (Wiki) which is a problem associated with using glass for a lens.  The other advantage is that the physical length is much shorter than a prime focus telescope because of the folding.

I'm thinking of adding a
Picatinny rail (Wiki) = MIL-STD-1913 = STANAG 2324 to the PVS-4 to make it more universal in application.  Then with a rail mounted on a camera tripod this scope would be good for astronomy.  Although first used just for mounting scopes it's now used as a general purpose mounting system.

Note that when you press your eye against the rubber eye cup the central two flaps will open.  This way when no one is looking through the scope and the power is on it does not act like a green light flashlight.

The rearmost (smaller diameter) ring is the diopter adjustment.  Just in front of it is the (larger diameter) objective focus adjustment.

Mounting brackets were available for:
Model
Caliber
M16A1 5.56 mm
M14 7.62 mm
M79 40 mm
M203 40 mm
M72A2
66 mm
M60
7.62 mm
M67
90 mm
 
It's not clear if the simple bracket shown on this scope is a standard part and all the other brackets attach to it, or if this tripod mount is removed to allow other brackets to be installed.
The stock image intensifier tube is the MX 9644 and the 3rd generation replacement tube is the 11620 UV, both are 25mm diameter tubes.

I've read, but not yet checked, that when looking directly into the objective that IR light is being radiated if the reticule is illuminated.  The PAS-6 IR viewer would work for this.


AN/PVS-4 Starlight
                  Scope, Night Vision Sight, Individual Served Weapon

AN/PVS-4 Starlight
                  Scope, Night Vision Sight, Individual Served Weapon

AN/PVS-4 Starlight
                  Scope, Night Vision Sight, Individual Served Weapon

AN/PVS-4
                Starlight Scope, Night Vision Sight, Individual Served
                Weapon
Carry Bag: 80063-SM-D-850482-1, MFR. 2S308
AN/PVS-4
                  Starlight Scope, Night Vision Sight, Individual Served
                  Weapon


Reticule 

The reticule and it's lamp are located at the front center behind a cap.

Lamp

The reticule lamp is a red LED mounted behind the front lens center cover.
Testing the three unit assembly showed an open circuit.
But after seperating the three parts and testing the LED it tested good.
After reassembly the lamp is now working.
This is a very common problem with old equipment caused by oxidation.
See: Hints & Tips - What Goes Wrong


AN/PVS-4 Starlight
                  Scope, Night Vision Sight, Individual Served Weapon
                  Reticule Lamp

Insert

Even though the LED emits red light when viewing through the eyepiece the reticule appeas as green.  At the top it says:
7.62/5.56.  It does not match any of the reticules shown on the Wiki page.


Mount

This mount is a simple bar with the common U.S. 1/4-20 tripod threads.  So this particular scope probably was used for night surveillance rather than on a weapon.
No need to fit a Picatinny rail since it now fits my existing photographic tripods.  Most likely to use on the Arriflex tripod.
AN/PVS-4 Starlight
                  Scope, Night Vision Sight, Individual Served Weapon,
                  Mount

FN FAL
AN/PVS-4
                  Starlight Scope Night Vision Sight, Individual Served
                  Weapon Mount FN FAL Rifle



Manuals

TM 11-5855-213-10 Operator's Manual, Night Vision Sight, Individual Served Weapon, AN/PVS-4 (NSN 5855-00-629-5334), 1 Feb 1993
TM 11-5855-213-23&P Unit and Direct Support Maintenance Manual (Including Repair Parts and Special Tools List) for Night Vision Sight, Individual Served Weapon AN/PVS-4 (NSN 5855-00-629-5334), 1 June 1993

PVS-4 Battery Caps

The PVS-4 Night Vision Sight, Individual Served Weapon (Wiki) has female threads on the sight and male thread on the cap, opposite of the PVS-5.  Also the thread pitch is different. 

To develop a battery adapter for the PVS-4 I will need a PVS-4 (the model that uses the BA-5567 battery) so that the battery compartment can be measured.
It does not need to work or even have the image tubes.
Stock PVS-4 Battery Cap
Stock PVS-4 Cap
Top Hat CR123 Batt Adapter
Top Hat CR123 Batt Adapter
Top Hat CR123 Batt
                  Adapter
1XEP3 Battery Adapter  2 AA
PVS-4 1XEP3
                  Battert Adaoter 2 AA
Marked:
Adapter Battery
U.S. 80063
A300 9873
SP0920-04-V-4124
M.F.G. 1XEP3
PVS-4 1XEP3 Battert
                  Adaoter 2 AA

PVS-4 1XEP3 Battert Adaoter 2 AA

Related

Optics
M227 M-227 Signal Lamp Equipment SE-11 - Gun shaped flashlight, trigger, relay, IR Filter option
M18 IR Binoculars - near IR not hot people or car engines
PAS-6 Metascope IR viewer and source
T3C - Russian monocular Image Intensifier (star light scope)
TVS-2 Crew Served Weapon Sight
MD-1 Automatic Astro Compass - also can see stars in the daytime
Astro-Compass for sighting Sun & stars
Periscopic Aircraft Sextant - Sun & stars
NextStar60 - cleaver microcontroller telescope using DC motors and shaft encoders
Orion - 9x63 binoculars - When the objective diameter (63 mm) is divided by the power (9X) if the exit pupil size (7 mm) is around 7 mm then the binocs are designed to be used with night adapted eyes, like for looking at the stars or to see things on the ground you could not see with bare eyes.  I once watched a dear swimming while being chased by a dog just after Sunset.  Although I could not see anything with my bare eyes, I could see fine with a pair of 7X50 binocs.  See my Binoculars page for more on star gazing binocs.
Celestron 8" Telescope with Equatorial wedge and tripod- This model has a clock drive but no computer control.  It's big and heavy, not something you pull out for a quick 5 minute look up.  Would be much better if used with a permanent pier.  It takes quite some time to do a Polar alignment, but when done you can find about anything just using the hour angle and declination scales.
Cloud Detection - used as part of an automated observatory
Hughes Probe Eye far IR viewer
PVS-5A Night Vision Goggles
UAS-4 Infrared Surveillance System, AN/AAS-14 Infrared Detecting Set, MK-898/AAS-14A Optical Filter Kit

Links

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