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Product Description

Refractive Bessel processing heads and diffractive Bessel processing heads are available
Terminal beam shaping module for laser processing systems, Enabling non-diffracting bessel beams with specific focal depths
Suitable for single-mode lasers, easy to integrate, low aberration, with small edge chipping, minimal heat-affected zone, and no taper during cutting
Operating wavelength λ: 1064 nm, focal depth in air: 0.5, 1, 2, 4, 6, 8 mm
Flexible parameter specification customization supported

The LBTEK Bessel Processing Head (BPH) is an optical module designed for the terminal of laser processing systems. It comes in two models: refractive and diffractive. The diffractive type integrates both diffractive and refractive optical elements within a metal mechanical sleeve, while the refractive type employs high-transmittance and high-damage-threshold optical components. Both types utilize the light-field modulation of axicon lenses and the beam shaping of a double-telecentric optical system to generate Bessel beams that meet the requirements of laser processing. The LBTEK Bessel Processing Head is suitable for single-mode lasers. Its optical components are made of high-transmittance substrates, ensuring high energy efficiency. The compact modular design facilitates easy integration and offers excellent compatibility with various laser processing systems. Through unique optical design, it achieves minimal aberration. The central lobe size of the output spot is <Ø5 μm, enabling cutting with minimal chipping, small heat-affected zones, and zero taper within a depth range of 0.2 mm to 12 mm (including custom specifications). LBTEK currently offers standard Bessel Processing Heads with a working wavelength (λ) of 1064 nm and air focal depths of 0.5, 1, 2, 4, 6, and 8 mm. Custom parameter specifications are also supported to accommodate diverse application needs. For details, please consult LBTEK Technical Support.

Attribute

Optical component materialN-BK7/UVFS

Operating wavelength λ1064 nm

Transmittance＞95 %@1064 nm

Output center spot size (@FWHM)＜Ø2 μm

Damage threshold10 J/cm<sup>2</sup>，1064 nm，10 ns，10 Hz

Air Depth of Focus0.5-8 mm optional

Refractive Bessel processing head, 1064 nm

Working wavelength 1064 nm, suitable for single-mode lasers
High transmittance, easy integration, small aberration
All integrated with high-damage-threshold refractive components

The LBTEK refractive Bessel processing head with a working wavelength λ of 1064 nm is suitable for single-mode lasers, integrating high-damage-threshold and high-transmittance optical components. It features a long working distance, high transmittance, and high energy utilization efficiency, enabling cutting effects with minimal chipping, small heat-affected zones, and no taper. The air focal depth can be customized.

Internal structure of the Bessel processing head

Product Model	Operating wavelength λ	Beam diameter (@1/e²)	Air Depth of Focus	Unit Price	Lead Time
RBPH-1064-8-2	1064 nm	Ø8 mm	2 mm	$1699.64	3 weeks
RBPH-1064-10-8	1064 nm	Ø10 mm	8 mm	$2157.23	3 weeks
RBPH-1064-10-6	1064 nm	Ø10 mm	6 mm	$2026.49	3 weeks
RBPH-1064-10-3	1064 nm	Ø10 mm	3 mm	$1830.38	2 weeks
RBPH-1064-8-1	1064 nm	Ø8 mm	1 mm	$1568.89	3 weeks

Diffractive Bessel processing head, 1064 nm

Working wavelength 1064 nm, suitable for single-mode lasers
High transmittance, easy integration, small aberration
Output spot size < Ø2 μm, small cutting edge chipping, small heat-affected zone, no taper
Air focal depth 0.5-8 mm optional
Incident end equipped with λ/4 waveplate for circular polarization modulation

The LBTEK Bessel processing head with a working wavelength λ of 1064 nm is suitable for single-mode lasers, featuring high transmittance, easy integration, and minimal aberration. Its emitted spot size is <Ø2 μm, with an optional air focal depth of 0.5-8 mm, enabling cutting effects with minimal chipping, small heat-affected zones, and no taper. The processing head includes a λ/4 waveplate at the incident end for convenient circular polarization modulation of the incident light, and its output port size specifications are either half-inch or 1-inch.

Internal structure of the Bessel processing head

Product Model	Operating wavelength λ	Beam diameter (@1/e²)	Air Depth of Focus	Unit Price	Lead Time
BPH-1064-6-05	1064 nm	Ø6 mm	0.5 mm	$1237.86	today
BPH-1064-6-1	1064 nm	Ø6 mm	1 mm	$1237.86	today
BPH-1064-6-2	1064 nm	Ø6 mm	2 mm	$1237.86	today
BPH-1064-8-4	1064 nm	Ø8 mm	4 mm	$1237.86	today
BPH-1064-10-6	1064 nm	Ø10 mm	6 mm	$1314.86	3 weeks
BPH-1064-10-8	1064 nm	Ø10 mm	8 mm	$1314.86	today