What F-theta scan lens do I need for a 300×300 mm CO₂ field?

From the catalog, EFL 450 mm covers a 300×300 mm design field (320×320 mm actual) with ~0.60 mm spot. Send galvo aperture, wavelength (9.3 or 10.6 µm) and power for a working-distance quote.

Are THOI scan lenses ZnSe?

Yes. The F-theta, three-axis and expander assemblies use zinc selenide optics in black barrels, AR-coated for 9.3 / 10.6 µm CO₂ lasers.

What thread is on the beam expanders?

M22×0.75 on every magnification from 1.5× to 8×.

Laser assemblies

CO₂ scan lenses, 3-axis heads, expanders.

ZnSe optics in black barrels, specified for 9.3 and 10.6 µm marking, cutting and welding. Tell us galvo aperture and field — we will return working distance.

Quote an assembly

Three-axis marking heads

Dynamic focus for large fields. Working distances are calculated from the maximum galvo scan angle for each requested field size.

Spec	Clear aperture	Scan field (mm)	Typical spot
C30	30	200×200 – 800×800	150 µm @ 200×200
C50	50	300×300 – 800×800	150 µm @ 300×300
C70	70	300×300 – 800×800	110 µm @ 300×300

F-θ scan lenses

Standard thread M85×1. Example SL3-9.3-60-90-14: 9.3 µm, under 500 W, EFL 90 mm, working distance 87.9 mm, CA 10 / 14 mm.

EFL (mm)	Lens Ø	Design field	Actual field	CA	Spot (mm)	Entrance Ø
73	48	50×50	60×60	43	0.15	<16
100	36 / 48	70×70	80×80	32 / 43	0.20	<8 / <16
160	36 / 48	110×110	130×130	32 / 43	0.20	<8 / <16
230	48	140×140	170×170	43	0.35	<16
254	48	175×175	190×190	43	0.40	<16
300	48	210×210	230×230	43	0.45	<16
330	48	250×250	265×265	43	0.50	<16
450	48 / 56 / 60	300×300	320×320	43 / 53 / 56	0.60	<16 / <22
592 / 562	48 / 60	400×400	420×420	43 / 56	0.70	<16 / <22

Beam expanders

Thread: M22×0.75 on every magnification.

Magnification	Input CA (mm)	Output CA (mm)
1.5×	12	14
2×	12	14
2.5×	9	19
3×	9	19
4×	9	19
5×	9	19
6×	9	20
8×	9	20

Questions buyers ask

What F-theta scan lens do I need for a 300×300 mm CO₂ field?: From the catalog, EFL 450 mm covers a 300×300 mm design field (320×320 mm actual) with ~0.60 mm spot. Send galvo aperture, wavelength (9.3 or 10.6 µm) and power for a working-distance quote.
Are THOI scan lenses ZnSe?: Yes. The F-theta, three-axis and expander assemblies use zinc selenide optics in black barrels, AR-coated for 9.3 / 10.6 µm CO₂ lasers.
What thread is on the beam expanders?: M22×0.75 on every magnification from 1.5× to 8×.