Use

Where the crystal
actually works.

KM CVD ZnSe is quoted for these infrared jobs — laser grade or optical grade as the print requires. Factory site uses: CO₂ laser components (automotive, medical, semiconductor) and, in defense, EOTS and thermal cameras on missiles and fighter aircraft.

CO₂ lasers — 10.6 µm

Focusing lens, output window or F-theta. Laser grade: bulk absorption < 0.0005 cm⁻¹ @ 10.6 µm (KM datasheet). Dual-band AR if a 633 nm HeNe rides the same path.

Thermal imaging — 8–12 µm

Camera windows and elements. Optical grade unless the print says resonator. Different AR than a cutting head.

FTIR / spectroscopy

Broadband windows when the bench spans mid-IR and you can live with a soft crystal. Uncoated unless you specify.

Cutting, marking & F-theta

The crystal in the beam path, not the machine. F-theta lenses for scan heads: laser grade, AR 10.6 µm. Optical grade does not belong here.

Medical CO₂

Factory site: ZnSe as a core CO₂ laser component for medical devices. We are not a medical-device manufacturer and we do not claim ISO 13485. Substrate only.

Semiconductor process

Factory site: ZnSe for semiconductor equipment optics. Optical grade unless a laser shares the port. Specify atmosphere and wavelength.

Defense — EOTS & thermal

KM’s factory site names ZnSe as a core material for EOTS and thermal imaging cameras on missiles and fighter aircraft. ITAR and end-use are stated on the paperwork when they apply. The photo is factory application imagery, not a claim that KM parts are in a specific platform.

Process-chamber windows

IR viewports on vacuum and process tools. Optical grade unless a laser shares the port. Specify atmosphere and wavelength.

Pyrometry & process IR

Looking at a hot process through a ZnSe window. Uncoated or a camera AR — not a CO₂ dual-band unless the print says so.

10.6 µm beam delivery

Relay windows and expanders in a CO₂ path. Laser grade. AR 10.6 µm. Optical grade does not belong in that line.

IR sample cells

Liquid and gas cells on an IR bench. Soft crystal — plan the seal and the clean, not a glass recipe.

Large-aperture IR

CVD grows area. KM datasheet maximum Dia 800 × 30 mm T. Clear aperture is quoted.

Application photos show the job, not a KM machine on that floor. Window close-ups are KM ZnSe.