II-VI Infrared

optik_set.jpgII-VI laser optics is manufactured from II-VI's own zinc selenide (ZnSe) crystals. Other materials such as copper (Cu), gallium arsenide (GaAs), germanium (Ge),  molybdenum (Mo), silicon (Si) and II-VI high-quality coatings are all carefully chosen and refined to improve the optical performance and II-VI's outstanding quality.

II-VI quality assurance program includes comparative testing, documentation and statistical analysis to ensure that each individual optic always fulfills the customers' high demands.

II-VI offers a large portfolio of testing equipment, collimators, Infrared Thermal Imaging Optics etc., all in addition to standard optics.   

LMI as a close partner of II-VI has the possibility and resources to develop even the most sophisticated optics. It is in other words not just the standard industrial optics but specially customized and designed optics for research purposes or for other niche areas where conventional optics are not enough. Contact us for more information.


Lenses for high power CO2 lasers suitable for all brands in the world market.
The lenses consist of Zinc Selenide (ZnSe), which is toxic and can become radioactive if the lens is damaged/broken. Always handle a lens that is destroyed carefully. Special instructions for this can be downloaded here on our website.

Our range of lenses

  • Trumpf cutting lenses (Cut Lenses)
  • MP-5 ultra low-absorbing for lasers with over 4 kW continuous power 
  • Aspherical lenses
  • Cylindrical lenses
  • Meniscus lenses; the most common lens shape for industry
  • Plano convex lenses

Mirrors and resonator optics
Mirrors are used in the optical beam path where the laser beam is guided towards the cutting head in the laser machine, or in the resonator. The mirrors can be totally reflective or partially reflective depending on the purpose. The resonator has, briefly explained, a rear reflective optic and a front so-called output coupler (partially reflective optic). Furthermore, there may be more mirrors within the resonator depening on how the resonator is designed and how the beam will reach its target. The output coupler is always partiallly reflective, ie it lets through some portion of the laser light that strikes it, but reflects back a larger amount so that the amount of energy in the cavity is always maintained and an even flow of laser light floods out of the resonator.
Other features may be that the mirror rotates the laser beam slightly, so-called phase shifting or λ-shift. Other mirrors are specified to give no phase shift at all.  All depending on what purpose that is needed in the end of the laser beam.
The most commonly used material in mirrors are silicon. Silicon is inexpensive, thermally stable, as well as durable and therefore very suitable for most types of mirrors. The silicon mirror is then coated with a suitable material to give its desired features.
Copper is also a commonly used material in high power applications for its high thermal conductivity.

Molybdenum is another important material used and is usually offered uncoated.  

ii vi_mat_cover.jpgYou can read more about optical materials and the production of the highly advanced optics for CO2 laser systems by clicking on the image on the left (flash application will open in a separate window).

Contact Micke Bergman

Want more info? Leave your email or your phone number and we will contact you. Alternatively, you can reach us at tel +46(0)281-307 18 or email micke@lmiab.se