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Custom Dual Band 850nm 940nm IR Bandpass Filter For Biometric Imaging

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Categories	IR Cut / IR Pass Filters
Brand	FELIX GLASS optical glass Manufacturing base
Model	FG-DUAL850-940-FILTER
Dual Passbands	850 nm & 940 nm infrared wavelength
FWHM	20 nm, customizable 5~50 nm
Peak Transmission	≥90% transmittance at 850nm & 940nm passbands
Blocking Range	400–700nm full visible light spectrum cut-off
Blocking Depth	OD4 ~ OD8 out-of-band light suppression
AOI	: 0° standard, customer-specified angle available
Substrate	Premium N-BK7 optical glass, fused silica optional
Shape	Custom round disc, square & rectangle sheet
Coating	Multi-layer sputtered interference anti-stray-light coating
Unit Price	US $ 7.8-13.2 / piece
FOB port	SHENGZHEN SHANGHAI GUANGZHOU
Terms of Payment	L/C, D/A, D/P, Western Union
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Detail Information

Custom Dual-Band 850nm / 940nm Infrared Bandpass Filter

Felix Glass dual-band infrared bandpass filter is high-precision dual-wavelength interference optical component for biometric imaging. It stably transmits 850nm & 940nm target infrared bands, while fully blocking 400-700nm stray visible light.

Adopted N-BK7 glass substrate and durable multi-layer sputtered coating, our dual band filter features stable spectral performance, low light drift and long service life for biometric camera modules.

Core Product Advantages

- Dual IR passband design, compatible with 850nm & 940nm dual lighting biometric systems

- Deep OD4~OD8 visible light blocking, eliminate imaging noise effectively

- ≥90% high peak transmittance, improve infrared camera sensitivity

- Full customization on shape, thickness, FWHM, edge blackening & blocking OD

- Stable multi-layer coating, anti-oxidation for long-term continuous operation

- 100% full spectral & dimensional inspection before delivery

Custom Processing Options

1. Shape Custom: Round, square, rectangle, special irregular outline

2. Spectral Custom: Adjustable FWHM, blocking depth OD2-OD8, custom wavelength

3. Edge Treatment: Raw edge, blackened edge, chamfered polished edge

4. Coating Custom: Single/double side multi-layer interference coating

Typical Application Scenarios

- Facial recognition access control camera modules

- Smartphone fingerprint identification optical sensors

- Biometric attendance & door lock imaging equipment

- Dual-wavelength industrial machine vision inspection

- Medical near-infrared optical testing instruments

OEM Manufacturing Capability

We provide one-stop OEM/ODM optical filter service: precision cutting, spectral coating, edge finishing and full spectral testing. Support prototype sampling, small trial batches and mass bulk production. All filters pass strict optical inspection to meet your customized drawing requirements.

FAQ

1. What spectral performance does this dual band IR filter support?

It transmits 850nm & 940nm infrared bands, fully blocks 400-700nm visible light, customizable FWHM and OD blocking level.

2. Can I customize the size, thickness and edge process?

Yes, we support full custom shape, dimension, thickness, edge blackening and coating parameters.

3. What substrate material do you use?

Standard N-BK7 optical glass, fused silica alternative available for high-temperature use.

4. Do you offer free samples and mass production?

Free prototype samples available, support small batch trial and large-scale mass order, full inspection for all finished filters.

Request a Quote

Send us your required dimension, FWHM, blocking OD, quantity and drawing. Our optical engineer team will provide tailored quotation and optical solution within 24 hours.

Related Products:

850nm Single Band Filter

940nm Single Band Filter

IR Cut Filter For Biometric Camera

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Learn more from our FAQ

What is your MOQ for custom optical glass and display glass parts?: Felix Glass offers highly flexible MOQ to support client projects, including prototype testing, small batch trial orders and large-volume mass production. All products can be fully customized according to your drawings, tolerances and application standards. Send us your specs to get an accurate price quote within 24 hours.

Can I get free glass samples for testing before bulk order?: Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.

What is the production lead time for custom optical glass components?: What is the production lead time for custom optical glass components?
Answer: The lead time for standard samples is 3–7 business days, while mass production takes 15–25 business days, depending on product complexity and order volume. We provide reliable, rapid delivery for orders serving the industrial, medical, automotive, and aerospace sectors. Please submit your project details to receive an accurate delivery schedule.

Are your optical glass products ISO, CE and RoHS certified?: All FELIX GLASS precision optical glass components comply with ISO quality system standards, as well as CE and RoHS requirements. We provide comprehensive test reports, material certificates, and inspection documentation for customer review. Please feel free to request full certification details and a formal quotation today.

Do you offer one-stop custom optical glass processing services?: Yes. We provide a full range of in-house processing services, including CNC machining, precision grinding, optical polishing, vacuum coating (AR, AF, AG, IR), tempering, and screen printing. Every step—from raw material to finished product—is carried out within our own facility. Please let us know your requirements, and we will provide you with the most cost-effective solution.