Limited-time discounts on our UV, VIS, NIR, and IR optical filters. Standard models are in stock for same-day shipping, ideal for urgent projects. Need a custom filter for your fluorescence setup? Our engineers can design it to your specifications.
Bandpass, longpass, shortpass, fluorescence, dichroic and neutral density filters with defined CWL, FWHM, transmission, blocking, substrate and size requirements.
Why choose us
Broad application coverage
We offer a full range of standard and custom optical filter solutions tailored for UV, VIS, NIR, IR, and fluorescence microscopy uses
Comprehensive product lineup
Our portfolio includes bandpass filters, longpass filters, shortpass filters, dichroic mirrors, neutral density filters, and fluorescence filter sets—all engineered for precision and reliability that meet global standards
Competitive value proposition
Leveraging our China-based manufacturing facility, we deliver cost-effective pricing, flexible production capabilities, and fast lead times
Trusted supply reliability
We excel in unmatched product quality, diverse product options, and consistent supply chain performance for your peace of mind
6,439+
In-Stock Product Models
About Us
OPTOStokes: Precision Optical Filters and Custom Coating SolutionsOPTOStokes supplies stocked and custom optical filters for engineers, instrument manufacturers, research laboratories, and OEM optical systems. We support applications across the UV, visible, NIR, SWIR, MWIR, and LWIR ranges, with filter designs matched to real system requirements—not just catalog specifications.Our product range includes bandpass filters, longpass filters, shortpass filters, neutral density filters, dichroic mirrors, fluorescence filter sets, Raman filters, notch filters, infrared filters, optical windows, mirrors, lenses, and prisms.For custom projects, OPTOStokes supports wavelength selection, substrate review, coating design, precision cutting, spectral measurement, and application-driven verification. Key capabilities include high-blocking filters, narrow bandwidth filters, multi-bandpass filters, gradient filters, steep-edge filters, fluorescence imaging filters, Raman edge filters, and IR ...
UV to IR Stock & Custom Designs International Quality, Competitive Pricing
Need help selecting the right optical filter?
Contact usExplore OPTOStokes' successful OEM case studies in Fluorescence, Imaging, and IR systems. See our advanced manufacturing capabilities, high-volume production control, and reliable quality assurance process.
Case
SWIR Imaging for Industrial Inspection: Seeing What Vis
Learn how SWIR imaging reveals material differences, silicon defects, moisture, and food composition—and how to select filters for industrial inspection....
Ammonia Detection Filter Selection Guide: 10460nm LWIR
Learn how to select a 10.45 µm Ge-based LWIR narrow bandpass filter for NH3 ammonia detection in NDIR sensors and thermal gas imaging systems....
Application Case: Filter-Based NIR Spectrometer for Gra
The OPTOStokes tags index includes directly usable internal topics such as near infrared, NIR spectroscopy, sampling modes, transmission, reflectance, Beer-Lamb......
The Essential Role of High-Precision IPL Bandpass Filte
OPTOStokes provides high-precision IPL Bandpass Filters for optimal spectral performance. Discover why filter quality, spectral purity, and custom engineering o......
Optical Filters for Machine Vision Applications
High-precision optical filters for machine vision enhance image contrast and clarity. Our IR cut-off and bandpass filters, available in stock or custom designs,......
Understanding Light Pollution: Causes, Effects, and Sol
Understand the causes, ecological and health impacts, and solutions of light pollution in 2025. OptoStokes's optical filters help reduce light damage and improv......
Fluorescence Optical Filters for CY5 and CY5.5 Imaging
High-precision fluorescence optical filters for CY5 and CY5.5 microscopy enhance image clarity. Our bandpass and custom filter sets deliver superior performance......
How to Clean Optical Filters for Peak Performance
Learn how to clean optical filters and components for optimal performance. Our expert tips ensure scratch-free maintenance, with custom and stock filters meetin......
Precision Optical Filters for Spectroscopy & Imagin
High-precision optical filters for spectroscopy, imaging, and laser applications. Our bandpass and IR cut-off filters ensure superior performance, available in ......
Fluorescence Microscopy Filters for High-Precision Imag
High-precision fluorescence microscopy filters enhance imaging clarity. Our custom and stock optical filters ensure optimal wavelength control, meeting global s......
OPTOStokes offers high-quality optical filters (bandpass, longpass, ND, fluorescence). OEM solutions, in-stock options & custom designs—precision for global clients.
Products
Stay updated with OPTOStokes’ optical filter news: industry insights, company updates & tech trends. Access latest resources for optical solutions.
News
06-11, 2026
What Are Infrared PMMA Filters?
OPTOStokes infrared PMMA filters block visible light (<1% T) and transmit 80-95% NIR. Custom IR acrylic panels with anti-scratch coatings available....
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06-08, 2026
What Materials Are Optical Thin Films Made Of?
Learn about optical thin film materials, their behavior during deposition, stoichiometry changes, and analysis techniques from OPTOStokes coating experts....
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06-04, 2026
How Does the Angle of Incidence Affect Optical Filter Perfor
Learn how angle of incidence (AOI) affects optical filter performance, including center wavelength blue shift, and best practices for filter placement from OPTO......
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06-04, 2026
What is the Working Principle of a Color Sorter?
Learn the working principle of color sorters, including optical detection systems, core components, and how OPTOStokes optical filters enhance sorting accuracy....
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