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Product Description

Absorptive Neutral Density Attenuators
Uncoated: 400 nm-650 nm
OD: 0.1-8.0
Low Power Applications

LBTEK Absorptive Neutral Density Attenuators (Uncoated) utilize a high-performance neutral density glass substrate, which exhibits stable absorption characteristics in the 400-650 nm wavelength range, making them suitable for various low-power laser energy attenuation applications. Currently, this product offers 19 optical density options (OD 0.1-8.0) and 4 sizes (Ø12.7 mm, Ø25.4 mm, Ø50 mm, L=50.8 mm) to meet diverse experimental needs. Additionally, the circular absorptive neutral density attenuators are also available in a mounted version (MNDFA series), where each product is pre-installed in a standard lens tube of the corresponding size (detachable). Furthermore, LBTEK offers custom services for attenuators with specific sizes and optical density values. For customization inquiries, please feel free to contact technical support.

Diagram

Attribute

Surface Flatness (@633 nm)λ/4

Clear Aperture>90% CA

Surface finish (scratches/pits)40/20

Parallelism<10 arcsec

Neutral Density Filter, Round, Uncoated, Mounted

Low Power Applications
Absorptive Neutral Density Filters
Pre-installed Mechanical Housing, Removable

LBTEK Absorptive Neutral Density Attenuators (Uncoated, Mounted) utilize uncoated neutral density glass, offering flat absorption characteristics from 400-650 nm. By precisely controlling the thickness and material type of the neutral density glass, high-precision OD attenuation can be achieved (OD tolerance ≤5% @550 nm). The MNDFA series are pre-installed in standard lens tubes (removable) and are available in various optical densities and sizes. The tube surface is engraved with product model, operating wavelength, and OD value for easy user identification. The corresponding tube models for 0.5-inch, 1-inch, and 2-inch neutral density attenuators are: SM05-8A, SM1-8A, and SM2-8A. Note: The thickness of the absorptive neutral density filter is for reference only; the actual thickness depends on the optical density of the glass batch used.

Absorbing neutral density attenuator with installation mounted on coaxial mounting plate

Product Model	Diameter	OD	Operating Wavelength	Unit Price	Lead Time
MNDFA10-80	Ø25.4 mm	8.0±0.40@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-70	Ø25.4 mm	7.0±0.35@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-60	Ø25.4 mm	6.0±0.30@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-50	Ø25.4 mm	5.0±0.25@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-40	Ø25.4 mm	4.0±0.20@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-30	Ø25.4 mm	3.0±0.15@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-20	Ø25.4 mm	2.0±0.10@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-10	Ø25.4 mm	1.0±0.05@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-05	Ø25.4 mm	0.5±0.025@550 nm	400 nm-650 nm	$39.88	today
MNDFA10-03	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	today
MNDFA05-03 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$29.94	today
MNDFA10-06 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA10-04 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA10-02 New	Ø25.4 mm	3.0±0.15@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA10-01 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA20-03 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$91.13	today
MNDFA05-05 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$29.94	today
MNDFA10-07 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA20-05 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$91.13	today
MNDFA05-10 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$29.94	today
MNDFA10-08 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA20-10 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$91.13	today
MNDFA05-20 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$29.94	today
MNDFA10-09 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA20-20 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$91.13	today
MNDFA05-30 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$29.94	today
MNDFA10-13 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA20-30 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$91.13	6 weeks
MNDFA05-40 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$29.94	6 weeks
MNDFA10-15 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$39.88	4 weeks
MNDFA20-40 New	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$91.13	6 weeks

Neutral Density Filter, Round, Uncoated, Unmounted

Low Power Applications
Absorptive Neutral Density Filters
Uncoated

LBTEK Absorptive Neutral Density Attenuators (Uncoated, Unmounted) utilize uncoated neutral density glass, offering flat absorption characteristics from 400-650 nm. By precisely controlling the thickness and material type of the neutral density glass, highly accurate OD attenuation can be achieved (OD tolerance ≤5% @550 nm). Currently, the Absorptive Neutral Density Attenuators (Uncoated, Unmounted) are available in various optical densities and sizes. They can be mounted into corresponding standard lens tubes, fixed lens mounts, and various coaxial mounting plates. Customers can flexibly choose the optimal mounting method based on specific application scenarios. Note: The thickness of the absorptive neutral density filter is for reference only; the actual thickness depends on the optical density of the glass batch used.

LBTEK absorptive neutral density filters installed in fixed lens mounts

Product Model	Diameter	OD	Operating Wavelength	Unit Price	Lead Time
NDFA10-15	Ø25.4 mm	1.5±0.075@550 nm	400 nm-650 nm	$34.78	today
NDFA10-13	Ø25.4 mm	1.3±0.065@550 nm	400 nm-650 nm	$34.78	today
NDFA10-09	Ø25.4 mm	0.9±0.045@550 nm	400 nm-650 nm	$34.78	today
NDFA10-08	Ø25.4 mm	0.8±0.04@550 nm	400 nm-650 nm	$34.78	today
NDFA10-07	Ø25.4 mm	0.7±0.035@550 nm	400 nm-650 nm	$34.78	today
NDFA10-06	Ø25.4 mm	0.6±0.03@550 nm	400 nm-650 nm	$34.78	today
NDFA10-04	Ø25.4 mm	0.4±0.02@550 nm	400 nm-650 nm	$34.78	today
NDFA10-02	Ø25.4 mm	0.2±0.01@550 nm	400 nm-650 nm	$34.78	today
NDFA10-01	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$34.78	today
NDFA10-80	Ø25.4 mm	8.0±0.40@550 nm	400 nm-650 nm	$34.78	today
NDFA10-70	Ø25.4 mm	7.0±0.35@550 nm	400 nm-650 nm	$34.78	today
NDFA10-60	Ø25.4 mm	6.0±0.30@550 nm	400 nm-650 nm	$34.78	today
NDFA10-50	Ø25.4 mm	5.0±0.25@550 nm	400 nm-650 nm	$34.78	today
NDFA10-40	Ø25.4 mm	4.0±0.20@550 nm	400 nm-650 nm	$34.78	today
NDFA10-30	Ø25.4 mm	3.0±0.15@550 nm	400 nm-650 nm	$34.78	today
NDFA10-20	Ø25.4 mm	2.0±0.10@550 nm	400 nm-650 nm	$34.78	today
NDFA10-10	Ø25.4 mm	1.0±0.05@550 nm	400 nm-650 nm	$34.78	today
NDFA10-05	Ø25.4 mm	0.5±0.025@550 nm	400 nm-650 nm	$34.78	today
NDFA10-03	Ø25.4 mm	0.3±0.015@550 nm	400 nm-650 nm	$34.78	today
NDFA05-03 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$20.92	today
NDFA05-05 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$20.92	today
NDFA05-10 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$20.92	today
NDFA05-20 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$20.92	today
NDFA05-30 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$20.92	today
NDFA05-40 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$20.92	today
NDFA20-03 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$76.75	today
NDFA20-05 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$76.75	today
NDFA20-10 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$76.75	today
NDFA20-20 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$76.75	today
NDFA20-30 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$76.75	today
NDFA20-40 New	Ø25.4 mm	0.1±0.005@550 nm	400 nm-650 nm	$76.75	today

Neutral Density Filter, Rectangular, Uncoated, Unmounted

Low Power Applications
Rectangular Neutral Density Filters
Uncoated

LBTEK's absorptive neutral density attenuators (rectangular, uncoated, unmounted) utilize uncoated neutral density glass, offering flat absorption characteristics from 400-650 nm. By precisely controlling the thickness and material type of the neutral density glass, high-precision OD attenuation can be achieved (OD tolerance ≤5% @550 nm). The rectangular absorptive neutral density attenuator has a size of L=50.8 mm square and can be mounted in a filter holder (FHM1). Note: The thickness of the absorptive neutral density filter is for reference only; the actual thickness depends on the optical density of the glass batch used.

LBTEK absorption neutral density filter is installed on FHM1

Product Model	OD	Size	Operating Wavelength	Unit Price	Lead Time
NDFAS20-60	6.0±0.30@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-50	5.0±0.25@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-40	4.0±0.20@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-30	3.0±0.15@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-20	2.0±0.10@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-15	1.5±0.075@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-13	1.3±0.065@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-10	1.0±0.05@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-09	0.9±0.045@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-08	0.8±0.04@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-07	0.7±0.035@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-06	0.6±0.03@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-05	0.5±0.025@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-04	0.4±0.02@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-03	0.3±0.015@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-02	0.2±0.01@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today
NDFAS20-01	0.1±0.005@550 nm	50.8 mm×50.8 mm	400 nm-650 nm	$76.75	today

Absorption-type neutral density filter, uncoated