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ABOUT II-VI INFRARED II-VI Infrared is a business unit of II-VI Incorporated, a global leader in engineered materials and optoelectronic components. Founded in 1971, II-VI Incorporated began by exclusively producing the highest-quality cadmium telluride (CdTe) material available for manufacturing high-power industrial CO2 laser optics. Today, II-VI Incorporated has diversified into numerous business units including laser tools for materials processing (HIGHYAG); near-infrared optics, YAG components, and telecommunications components (VLOC); fiber optics, projection and display optics, DPSS laser,...

OUR OPTICS MANUFACTURING FACILITIES 11-VI Infrared — Global Headquarters 11-VI Singapore Pte., Ltd. 11-VI Optics (Suzhou) Co., Ltd Singapore Suzhou, P.R. China

PLANO-CONVEX LENSES Specifications Dimensional Tolerance Edge Thickness Variation (ETV) Clear Aperture (polished) Plano: 1 fringe ½ fringe Power Irregularity Radius: Power and irregularity vary depending upon radius Scratch-Dig AR Coating Reflectivity per Surface at 10.6µm Plano-convex lenses, the most economical transmissive focusing elements available, are ideally suited for laser heat treating, welding, cutting, and infrared radiation collection where spot size or image quality is not critical. They are also the economical choice in high f-number, diffraction limited systems where lens shape...

MENISCUS LENSES Specifications Dimensional Tolerance Edge Thickness Variation (ETV) Clear Aperture (polished) Surface Figure (power/irregularity) at 0.63µm Varies depending upon radius AR Coating Reflectivity per Surface at 10.6µm Meniscus lenses are designed to minimize spherical aberration, producing a minimum focal spot size for incoming collimated light. Description ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe ZnSe In addition to the standard focal lengths listed below, II-VI maintains an extensive inventory of test plates and tooling,...

MP-5® ULTRA-LOW ABSORPTION LENS THE BEST ... NOW EVEN BETTER. II-VI Infrared’s MP-5 is an ultralow absorbing lens that ships directly from the factory as a standard OEM CO2 laser component. Its superior features include a patented coating design enabling lower thermal distortion, visible transmission for reduced set-up time, and easy detection of thermally induced stress. The MP-5 is backed by over a decade of proven performance, and this ultra-low absorbing lens is designed, produced, and supported by II-VI Infrared, the world leader in CO2 laser optics. A specially coated zinc selenide (ZnSe)...

OUTPUT COUPLERS Partial reflectors are commonly used as laser output couplers or beam attenuators. For your convenience, II-VI maintains commonly used coatings and substrate radii of curvature in inventory. Specifications for these products are indicated on this page. For available special substrate sizes and coatings, please contact a II-VI sales representative for a quotation. Laser output couplers often require a slightly wedged substrate to eliminate interference from multiple reflections inside the component. If you require a specific wedge value, please specify this when ordering. Specifications...

REAR MIRRORS Rear mirrors, typically GaAs, Ge, or ZnSe, are partial reflectors with a very high reflection-to-transmission ratio (99.0 to 99.7%), and are key optical components in laser resonators or laser cavities. Rear mirrors, like output couplers, are a part of the lasing process. Thus, high reflectivity is desired. The slight transmission of rear mirrors is used in conjunction with power meters to test for laser resonator output power. When laser resonator designs require rear mirrors to be total reflectors, Si, Cu, or Mo substrates are used, the latter being typically uncoated. Specifications...

PLANO AND SPHERICAL MIRRORS Standards Specifications Dimensional Tolerances Diameter Thickness Clear Aperature (polished) Surface Figure at 0.63µm Power: 2 fringes Irregularity: 1 fringe 10-5 Mirrors or total reflectors are used in laser cavities as rear reflectors and fold mirrors, and externally as beam benders in beam delivery systems. Silicon is the most commonly used mirror substrate; its advantages are low cost, good durability, and thermal stability. Copper is typically used in high-power applications for its high-thermal conductivity. Molybdenum’s extremely tough surface makes it ideal...

REFLECTIVE PHASE RETARDERS kerf which Is broad produces a larger kerf Metal cutting and other critical laser operations are sensitive to any variation in kerf width or cross-section. The kerf's quality depends on the polarization orientation relative to the cut direction. This is illustrated in Figure 1. Current theory suggests that the assumption of a focused beam striking the work piece at normal incidence is only true at the cut's beginning. Once the kerf forms, the beam encounters metal at some large angle of incidence, 0, as shown in Figure 2. Light which is s-polarized with reference to...

Dimensional Tolerance Clear Aperture (polished) Surface Figure (power/irregularity) at 0.63µm Ellipticity Ratio Clean cut produced by circularly polarized light. Edge Thickness inches (mm) *Cu-WC: water-cooled copper Contact a II-VI sales representative for exact specifications. Phase Shift @ 10.6µm (degrees) Ragged cut produced by linearly polarized light. * Cu-WC is water-cooled copper. Contact a II-VI sales representative for exact specifications.

ABSORBING THIN-FILM REFLECTORS (ATFR) The Absorbing Thin-Film Reflector (ATFR) incorporates a polarization sensitive thin-film reflective coating on a Cu substrate. This coating was initially designed for use at 10.6μm and 45° angle of incidence. The coating will reflect s-polarization and absorb p-polarization; therefore, it must be placed in the beam delivery system where the incident beam is s-polarized. In cutting applications where the workpiece is highly reflective, reflections from the workpiece can be transmitted back through the beam delivery system into the laser cavity. This is most...