Zinc Selenide Infrared (IR) Focusing Objectives and Collimators were designed to provide maximum coupling efficiency between the output from Mid-IR lasers and chalcogenide and polycrystalline optical fibers. The aspheric design of focusing objectives provides a focal spot smaller than the fiber core diameter, allowing for precision alignment. Zinc Selenide Infrared (IR) Focusing Objectives and Collimators are available with multiple anti-reflection (AR) coating options between 3-5µm or 8-12μm and are ideal for a range of fiber coupling and collimating applications.

Key Features

Compatible with SMA-terminated fiber cables
NA=0.35, Pupil diameter 15 mm
Refocusing or collimating design

Typical Applications

Focusing of collimating beam into the fiber
Collimation of output beam from fiber
Fiber end imagination to detector / emitter element
For Polycrystalline fiber cables (4-18 μm) and Chalcogenide fiber cables (1-6 μm)

Objective Type	Collimating	Refocusing
Optic Elements	Plano-convex ZnSe Lens, 3-5 or 8-12 μm AR-coating F=20 mm	Double-convex ZnSe lens, 3-5 or 8-12 μm AR-coating 2F=20 mm
Dimensions	Diameter 8 mm and length of 25 mm	Diameter 28 mm and Length of 25 mm
Alignment Options	Z-alignment ± 5 mm	Z-alignment ± 5 mm
Other Options	FC/PC Fiber adapter on request	FC/PC fiber adapter on request