Collimators and IR
lens assemblies.
QCL aspheres, MWIR/LWIR camera objectives and fiber collimators quoted from source NA, band and mount — not from a focal-length list.
QCL / MWIR collimator
Collimate the source you actually have.
A catalogue ZnSe sphere is the wrong collimator for a 4.6 µm QCL with fast-axis NA ~0.7 and astigmatism. We quote aspheres, thermal camera objectives and fiber collimators from the source parameters — not from a focal-length list.
- QCL band3.3 – 12 µm typical
- Uncooled LWIR8 – 14 µm · Ge / chalcogenide
- Cooled MWIR3 – 5 µm
- Fiber VIS/NIRAsphere in FC / SMA housing
QCL aspheres
Molded chalcogenide or diamond-turned ZnSe/Ge aspheres for collimation, focusing and fiber coupling. Fast-axis NA and astigmatism belong on the RFQ — a spherical singlet will leave power on the table.
- NAMatch the fast axis
- ARLine or BBAR 3–5 / 8–12
- Note4.3–4.8 µm collimation
Thermal camera lenses
Fixed EFL and dual-FOV assemblies for uncooled microbolometers (8–14 µm) and cooled MWIR cameras. f-number, pixel pitch and FPA size set the design — send those, not only “25 mm lens.”
- f/# typicalf/1.0 – f/1.4 LWIR
- MountM34 · M34×0.5 · custom
Fiber collimators
Aspheric glass in FC/PC, FC/APC or SMA905 housings for VIS/NIR coupling and collimation. For IR fiber (chalcogenide, PIR) the collimator substrate has to transmit the same band as the fiber.
- ConnectorFC · SMA905
- Beam ØQuoted at 1/e2
FTIR crystal optics
KBr and NaCl imaging and condenser elements for FTIR microscopes, plus build-to-print crystal windows. Hygroscopic — packaging and storage notes go on the quote.
- SaltsKBr · NaCl
- BroadbandCaF2 alternative
Custom optomechanics
Barrel, spacer and retaining-ring sets to print. We can coat and mount customer glass, or supply the optic and the cell together so centration is one lot.
- CentrationQuoted with mount
- FinishAl · anodize · custom
Drop-in replacements
If you already have a commercial collimator P/N, send it. We quote equivalent EFL, NA, AR and mount — we do not reverse-engineer a competitor’s coating curve without a measured sample.
- Best inputP/N + λ + NA
- BetterA sample to measure
Source parameters, not just EFL.
- Source: QCL line, thermal FPA (pitch, format), or fiber core / NA
- Desired output: collimated Ø, spot, or FOV
- Band and coating (line AR vs 8–12 µm BBAR)
- Mount thread, back focal distance, envelope
- Operating temperature — germanium transmission falls with heat
Related
- ChalcogenideAMTIR / molded IR
- GermaniumLWIR lenses
- FibersIR fiber + collimator
Send NA and wavelength.
That pair decides asphere vs sphere, ZnSe vs chalcogenide, and whether the coating is even worth applying.