MID-IR Collimators for SMA Connectors (2 μm to 12 μm)
The same AR-AR coated ZnSe micro-lens used in our Mid-IR Focusing Objectives is used in our Mid-IR Collimators. These are designed to connect to SMA connectorized IR ber cables.
Our Mid-IR Collimators are focusable so as to compensate for different wavelengths. These are available “as is” or mounted in the 1-inch diameter Cell, which in turn mounts into our HTP Tilt Plate Positioner or any 1-inch laboratory X-Y stage.
| Catalog Number | Focal Length | Clear Aperture | Numerical Aperture |
| FCR-6-λ | 6 mm | 0.5 mm | 0.25 |
| FCR-12-λ | 12 mm | 1.0 mm | 0.13 |
| FCR-18-λ | 18 mm | 1.6 mm | 0.08 |
λ: When ordering, specify wavelength for AR coatings.
A comment on Numerical Aperture… think of the NA of the fiber as a cone or a funnel… if the light rays are at an angle that is smaller than the cone angle, the light will get through the fiber.
2NA = d/f
d = laser beam diameter
f = focal length of lens