GuS: The leader in military periscope technology
For more than four decades, GuS has been specialized in producing periscopes of the highest quality and holds a leading position worldwide in the respective field through continuous research and development. 

Thanks to our core competence – the autoclave-based lamination of optical materials – and our many years of experience, we have continuously improved the temperature resistance and durability of our products, especially in the acrylic versions.

Our latest generation of adhesive technology has been successful on the global market for quite some time and has been proved itself many times in customer tests.

Other tested GuS technologies that we manufacture ourselves are heating films, mirrors, laser protection filters, and glass and PMMA components.

GuS military periscopes are maintenance-free.

All periscopes can be delivered with housings made of metal (e.g. aluminum), plastic (e.g. ABS) or combined materials. In addition, we also produce periscopes made of acrylic or glass, depending on the requirements for transmission, weight and climate-resistance.

Advantages of

  • better visual capacity after impact
  • about 50% lighter
  • temperature resistance of more than 70°C (158°F)
  • cost-effective

Advantages of

  • best optical characteristics
  • high light transmission
  • extreme temperature resistance

Safety of tank

Every tank periscope additionally provides
  • CBRN and fuel protection
  • EMC protection
  • ballistic protection against bombardment from different angles
  • thermal, humidity and mechanical resistance, tested according to MIL or TL by, for example:
    • thermal cycling test
    • thermal shock test
    • UV resistance test
    • humidity test
    • falling abrasive test
    • shaker test
    • salt spray resistance test


If a periscope is damaged, repairing is possibly more efficient and cost-effective than completely replacing it. Our specialists identify the damage and repair it in such a way that the periscope continues to meet the original specification.

Also, in many cases, combat value can be improved by plug-and-play solutions. For example, we can install additional laser protection in the desired frequency, integrate a display or supply you with a space-saving folding version. Please contact us if you are interested in the possibilities for enhancing your periscopes.



Periscopes with new “waterproof” housings

The outer seal on traditional M17 and M27 periscopes allows water to get inside the body of the periscope over time. The new GuS housing prevents any ingress of water since the seals are inside the vehicle. This increases the periscope’s durability.

Periscopes with integrated display screen

This market innovation allows important information to be displayed directly onto the tank periscope’s field of vision – to be individually adjusted to the information requirements of the viewer, such as:

  • instrument display
  • navigation device
  • the vehicle’s technical data
  • warnings

The driver can keep his eyes on the road and does not have to switch between direct and digital views.

Laser protection

Lasers are used more and more often for target acquisition. If an eye is hit by a laser through a tank periscope, it can be severely injured or blinded. GuS therefore offers laser protection filters that guarantee ideal light transmission while filtering out selected laser wavelengths. You can choose a combination of up to three different wavelength ranges to give your troops the best protection.

  • 1-line laser protection filters made of a laser absorbing glass substrate
  • 2-line laser protection filters made of a laser absorbing glass substrate coated with a multi-layer interference filter (hybrid laser protection filter)
  • 3-line laser protection filters made of a laser absorbing glass substrate coated with two multi-layer interference filters (hybrid laser protection filters) or consisting of a combination of laser absorbing plastic layers, laser absorbing glass substrates and multi-layer interference filters.

Standard GuS laser filters:

Wavelength OD
532 +/- 5 nm 3.4
694 +/- 5 nm 3.4
840 to 905 nm 4.0
905 to 1064 nm 5.0
1064 to 1100 nm 6.0

Additional protective functions and accessories

  • EMC protection – protection from electromagnetic waves penetrating the army vehicle
  • Lamellar seals as the ideal protection against water penetration
  • Window heaters against condensation and frost provide clear vision at high levels of humidity in the army vehicle or when outside humidity settles on the windows in winter.
  • Second field of vision, static or dynamic: By special design of the optical paths in the tank periscope, an additional field of vision can be added.
  • Protective covers for tank periscopes are used to protect the crew from head injuries, especially when traveling off-road.
  • Blackout covers prevent light from escaping the vehicle, for example during night missions.
  • Flip-mirror versions do not only save space, but can also be adjusted to the individual distance between the crew’s eyes and therefore provide more ergonomic flexibility.

We can also protect all outer panes against dirt, reflections or rock strikes using special coating. For example, a desert vehicle with lookout periscopes can be equipped with transparent ceramics that meet the requirements according to MIL-STD-810G, method 510.5 procedure II (sand).

Depending on the customer’s wishes, digital information can also be integrated, e.g. from night-vision devices, such as thermal, infrared or residual-light-amplifier cameras, or other cameras already on board.


The smallest GuS periscope measures only 50 x 20 x 20 mm while up to now our largest is 320 mm high, 1,000 mm wide and 110 mm deep.

Would you like to order our military periscopes, vision blocks or attachments? Then please select the available NSN numbers or look for a solution that matches your requirements. If you cannot find a finished product with the ideal measurements for your FOV, we will be happy to create something new specifically for you.

In its current range, GuS has about 400 different periscope models that vary in geometry, materials used and combinations implemented.