Bandpass Optical Filters
Used for fluorescence detection, laser wavelength isolation, machine vision lighting and biomedical imaging. CWL, FWHM and OD blocking can be matched to the detector and illumination source.
Custom Bandpass Optical Filter
Optical Filters
Felix Glass manufactures custom precision optical glass filters for visible and ultraviolet spectral control, including bandpass, longpass, shortpass, dichroic and neutral density coating designs for machine vision, medical diagnostic imaging, visible light laser modules, UV detection and semiconductor inspection equipment. This product group focuses on visible and ultraviolet optical filters. Infrared bandpass, long-wave infrared (LWIR), mid-wave infrared (MWIR), and thermal imaging filters are provided separately within our dedicated Infrared Optics category. Substrate selection affects transmittance, coating stability, flatness control and service life. Typical customization ranges shown for reference. Actual specifications depend on material selection and engineering requirements. Felix Glass supports drawing-based OEM / ODM precision optical glass filters with custom central wavelength, FWHM, blocking depth, OD level, surface quality, diameter, thickness and mounting edge treatment. Fused silica and UV glass options are available for 365nm UV inspection, UV curing monitoring, spectral testing and laboratory detection systems. Multi-layer interference coating designs support spectral separation, beam combining and color-channel control in laser, stage lighting and optical instrument assemblies. Edge filter and neutral density designs help manage cutoff wavelength, optical density and intensity attenuation for visible light inspection and laser protection systems. Ion beam assisted multi-layer vacuum coating is available for bandpass, longpass, shortpass, UV AR, dichroic and neutral density functional coatings. Felix Glass operates imported high-precision flat grinding equipment, automated coating lines and an independent optical inspection laboratory with Zygo laser interferometer, high-precision spectrophotometer and transmittance testing equipment. Filter performance changes with optical path design, incidence angle, coating stack, substrate surface quality and operating environment. Typical customization ranges shown for reference. Actual specifications depend on material selection and engineering requirements. Filter spectral performance shifts under non-zero incident angles; customized coatings are available for 0 degree / 5 degree / 10 degree / 30 degree operating angles. Strict FWHM tolerance can be supported for narrowband precision detection systems. Coatings can be optimized for industrial and medical continuous operating temperature ranges. Standard industrial coatings, high-stability medical-grade coatings and scratch-resistant hardened coatings are optional. Surface scratch-dig grade directly affects imaging noise and laser threshold stability, and can be customized per project requirements.
Visible and UV Optical Filters
Custom Precision Optical Filters | Visible & UV Filters for Machine Vision, Medical & Laser Systems
19 years precision optical components custom manufacturing experience
75000 square meter independent optical precision manufacturing base
ISO9001, CE, RoHS, REACH and ISO13485-compatible production support
Request Custom Filter Quote
Material Selection
Optical Filters Base Material Selection & Visible / UV Spectral Performance
Material Transmission Range Refractive Index Hardness Typical Applications Recommended Coating Compatibility BK7 Visible to near UV engineering range Approx. 1.5168 at 587.6nm Optical crown glass reference grade Machine vision, visible laser alignment, biomedical illumination filters AR / Bandpass / Longpass / Shortpass / ND Coatings Fused Silica UV to visible spectral applications Approx. 1.4585 at 587.6nm High thermal stability and low expansion UV detection, fluorescence analysis, semiconductor wafer inspection UV AR / Deep UV Bandpass / Dichroic Coatings Sapphire UV, visible and high-durability optical use Approx. 1.76 ordinary ray Mohs 9 high-hardness crystal Aerospace-related UV sensing, scratch-resistant protective filters, harsh industrial optics High-Durability AR / Hardened Spectral Coatings
Product Categories
Common Types of Precision Visible & UV Optical Filters
UV Pass and UV Detection Filters
Dichroic and Beam-Splitting Filters
Longpass, Shortpass and ND Filters
Coating Engineering
Custom Multi-Layer Optical Coating Solutions for Spectral Components
Bandpass / NarrowbandControlled CWL, FWHM and OD blocking for precision detection.
Longpass / ShortpassDefined cut-on or cut-off wavelength for spectral separation.
Neutral DensityStable visible attenuation for imaging and optical power control.
UV AR / DichroicUV transmission enhancement and multi-channel spectral routing.
Engineering Reference
Engineering Design Considerations for Filter Integration
Angle of incidence effects
Bandwidth tolerance control
Temperature drift stability
Coating durability grades
Surface quality influence
13 results
ViewShowcase
Custom RG780 / HWB780 black longpass optical glass filter for 780nm IR pass, visible light cut and OEM filter blanks.
ZWB2 ultraviolet bandpass optical filter glass transmits 365nm UV light while blocking visible light, made of fused silica / K9 / B270 optical glass with double interference coating. Support OEM custom cutting in round & square shapes, widely used for UV detectors, UV flashlights and optical lab instruments.
Custom OEM dichroic rainbow optical glass filter for stage light, laser beam splitter, spectral instrument, free samples
High precision custom bandpass optical filter with optional OD4/OD5/OD6 deep blocking, customizable center wavelength and size
Custom curved UV cold mirror dichroic filter with JGS1 fused silica substrate, high UV reflect & IR transmittance
OEM customized longpass fused silica quartz filter with composite AR+ITO coating, over 90% transmittance,
MOQ:1 piece
Unit Price:US $6.7-11.6
Custom 650nm IR cut optical low-pass filter blocks infrared above 650nm, transmits visible light,specially designed
MOQ:1 piece
Unit Price:US $8.6-14.8
High-quality 400-1100nm long-wave IR bandpass filter made of fused silica quartz glass, with AR & ITO dual coating,
MOQ:1 piece
Unit Price:US $7.8-13.2
Custom OEM dual band 850&940nm IR bandpass filter for facial/fingerprint biometric camera, full optical inspection.
MOQ:5 piece
Unit Price:US $7.2-12.5
Custom 850nm narrow bandpass IR filter with round & square N-BK7/fused silica substrate, customizable CWL, FWHM, OD blocking
OEM fused silica broadband bandpass filters made of colored optical glass,for UV-IR spectrum, with 3-year quality warranty.
fluorescent green dielectric interference narrow bandpass filters Custom specs support fluorescence imaging,confocal microscopy
MOQ:5 piece
Unit Price:US $7.56-9.56
Custom 650nm IR cut filter, high precision glass for camera imaging. OEM supported.
Application Scenarios
Core Industrial Applications of Custom Visible & UV Optical Filters
Precision optical glass filters are selected according to wavelength band, detector response, illumination source, mechanical mounting and cleaning environment. Typical customization ranges shown for reference. Actual specifications depend on material selection and engineering requirements.
Industrial Machine Vision
Contrast enhancement, wavelength isolation and glare control for inspection cameras.
Medical Diagnostic Imaging
Visible light and fluorescence filter support for diagnostic and laboratory devices.
Visible Light Laser Systems
Laser line selection, optical density blocking and beam-path spectral control.
UV Spectral Testing
365nm and other UV pass filters for inspection, curing and spectral analysis.
Semiconductor Wafer Inspection
Stable UV and visible wavelength control for optical metrology assemblies.
Aerospace-Related UV Sensing
Custom coated substrates for aerospace-related optical sensing and testing systems.
OEM / ODM Custom Service
Non-Standard Wavelength, Shape & Spectral Customization Service
Felix Glass supports custom optical filters with non-standard wavelength bands, round, square, rectangular or special shapes, compound coating stacks, edge chamfering and drawing-based dimensional control for prototype and small batch development through mass custom optical manufacturing.
Drawing ReviewSpectral Target CheckCoating DesignPrototype TrialBatch InspectionClean Packaging
Production and Inspection
Full QC Inspection & Spectral Testing Workflow for Mass Production
The optical filter production route combines ultra-precision flat polishing, ion-beam multi-layer vacuum coating, optical edge processing and batch spectral verification. The independent optical inspection laboratory supports Zygo laser interferometer, high-precision spectrophotometer and transmittance testing equipment.
Full Production Workflow
Substrate selection -> flat grinding and polishing -> cleaning -> multi-layer vacuum coating -> spectral testing -> surface inspection -> dust-free packaging.
Inspection Items
- Center wavelength and FWHM verification
- Visible / UV transmittance curve testing
- Optical density and blocking depth inspection
- Surface quality, scratch-dig and edge defect screening
- Flatness, parallelism and dimensional tolerance verification
- Coating uniformity, adhesion and durability checks
Compatible Optical Products
Compatible Optical Products for Visible & UV Optical Systems
Optical filters are commonly matched with the following custom optical components to build complete visible and UV optical systems. Note: Thermal infrared optical filters are categorized within our Infrared Optics product group.
Engineering Support
Engineering Support Across Material, Coating and Assembly Review
Manufacturer: Hong Kong Felix Glass Co., Limited. Brand: Felix Glass. Country of manufacture: China. Service: OEM / ODM custom optical components. MOQ: Prototype and small batch available. Production capability: mass custom optical manufacturing.
19 yearsPrecision optical component customization experience
75000 square metersIndependent optical precision manufacturing base
ISO9001 / CE / RoHS / REACHDocumentation support with ISO13485-compatible medical production standards
Engineering FAQ
Frequently Asked Questions About Custom Optical Filters
What are optical filters used for in machine vision?
They isolate useful wavelengths, reduce background light and improve image contrast for inspection cameras and automated visual measurement systems.
How do I choose a bandpass optical filter?
Define center wavelength, FWHM, blocking range, target transmittance, incidence angle and detector response before selecting substrate and coating design.
Can Felix Glass customize UV optical filters?
Yes. Fused silica, sapphire and UV filter glass options can be processed for UV detection, UV curing monitoring and spectral testing systems.
What is the difference between longpass and shortpass filters?
A longpass filter transmits wavelengths longer than the cut-on point, while a shortpass filter transmits wavelengths shorter than the cut-off point.
Can optical filters be made from BK7, fused silica and sapphire?
Yes. These visible and UV substrates are available, with final selection based on wavelength range, durability, coating design and system environment.
What coating options are available for precision optical glass filters?
Available options include AR, bandpass, longpass, shortpass, neutral density, UV AR, dichroic and hardened spectral coatings.
Can optical filters be combined with optical prisms in one system?
Yes. Optical filters can be matched with optical prisms when the mechanical path, incidence angle and spectral shift are reviewed together.
How should optical filters be cleaned and maintained after coating?
Use clean optical tissue, filtered air and coating-compatible solvent procedures. Avoid abrasive wiping, bare-hand contact and aggressive chemicals unless approved for the coating grade.
What information is needed for a custom optical filter quotation?
Provide wavelength, bandwidth, transmittance, OD blocking, size, thickness, material, incidence angle, surface quality, quantity and application environment.
Can OD4, OD5 or OD6 blocking be customized?
Blocking depth can be designed according to the application, but feasibility depends on passband, stopband, coating stack and substrate choice.
Are visible and infrared filters handled in the same product group?
No. This group focuses on visible and ultraviolet filters. Infrared bandpass, MWIR, LWIR and thermal imaging filters belong to Infrared Optics.
Can non-standard shapes and small batches be produced?
Yes. Prototype and small batch production are available for round, square, rectangular and special-shaped filters based on drawings.
How does angle of incidence affect filter performance?
Non-zero incidence angles can shift spectral response. Coating designs should specify the working angle, such as 0 degree, 5 degree, 10 degree or 30 degree.
Can filters be supplied for medical diagnostic imaging?
Yes. Felix Glass can support medical diagnostic imaging optical filter projects with appropriate documentation and ISO13485-compatible production standards when required.
Can each batch include optical inspection reports?
Inspection report support can include dimensional data, transmittance curves, coating checks and surface quality records according to project requirements.
Are thermal infrared filters available from Felix Glass?
Yes, but they are organized under the Infrared Optics category to keep visible / UV and infrared product lines clearly separated.
Technical Downloads
Technical Downloads for Optical Filter Projects
Use these standard document types when preparing an engineering request or internal purchase specification.
Request Engineering Evaluation for Custom Optical Filters
Upload your spectral requirements, CAD drawings, optical coating specifications or Zemax design files for precise engineering evaluation and customized quotation.
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.
CONTACT US NOW FOR A QUOTE
Send an inquiry now—we will respond promptly within 1–24 hours and provide our best formal quote within 1–2 days! Let’s start a mutually beneficial partnership today...
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