Semrock Optical Filter Sets and Individual Filters

Overview

Semrock optical filters are precision thin-film interference filters engineered for demanding applications in fluorescence microscopy, laser-based instrumentation, Raman spectroscopy, and multiphoton imaging. Built on proprietary hard-coated dielectric multilayer technology, Semrock filters deliver exceptional spectral performance—including steep edges, high transmission (>90% typical in passbands), deep blocking (OD6–OD8 in stopbands), and exceptional environmental stability. Unlike traditional soft-coated or epoxy-bonded filters, Semrock’s monolithic, ion-assisted deposition process ensures mechanical robustness, resistance to cleaning solvents (e.g., isopropanol, acetone), and long-term wavelength stability under thermal cycling and high-intensity illumination. These characteristics make them suitable for GLP/GMP-compliant laboratory environments and automated imaging platforms requiring reproducible, audit-ready optical performance.

Key Features

• Hard-coated dielectric thin-film architecture with no organic adhesives—enabling solvent-resistant cleaning and >10-year spectral stability
• Ultra-steep edge performance: RazorEdge® high-pass/low-pass filters achieve <1% edge width (defined at 10%–90% transmission) for precise spectral separation in multicolor fluorescence and Raman rejection
• High laser damage threshold (>5 J/cm² at 1064 nm, 10 ns pulse) — validated for integration into solid-state laser scanning systems and confocal platforms
• Polarization-insensitive design across all standard 45° dichroic mirrors, ensuring consistent reflectance/transmission regardless of incident polarization state
• Customizable substrate materials (fused silica, BK7, CaF₂) and mounting options—including OEM-compatible filter mounts with precision kinematic alignment features
• Comprehensive ISO 10110–7 certified surface quality (scratch-dig ≤ 10–5) and wavefront distortion <λ/4 over Ø25 mm clear aperture

Sample Compatibility & Compliance

Semrock filters are designed for compatibility with standard microscope filter cubes (e.g., Nikon C-HGFI, Olympus U-MF2, Zeiss 488/561/640), laser line modules (405, 442, 488, 532, 561, 633, 640, 785 nm), and spectroscopic light sources (Hg/Xe arc lamps, supercontinuum lasers). All filters meet RoHS Directive 2011/65/EU and REACH Annex XIV restrictions. Manufacturing adheres to ISO 9001:2015 quality management standards. Filter spectral data files (ASC, CSV, and SDF formats) are provided with NIST-traceable calibration certificates, supporting compliance with FDA 21 CFR Part 11 requirements for electronic records in regulated life science laboratories.

Software & Data Management

Each Semrock filter shipment includes a unique serial-numbered spectral dataset compliant with the ASTM E275-22 standard for optical filter characterization. Spectral curves are delivered in machine-readable ASC format compatible with common image analysis software (e.g., Fiji/ImageJ, MetaMorph, HALO, Visiopharm) and instrument control APIs (NI LabVIEW, MATLAB Instrument Control Toolbox). Optional spectral modeling tools (via Semrock’s FilterSolutions™ web portal) allow users to simulate multi-filter stack performance—including crosstalk, bleed-through, and signal-to-noise ratio—prior to experimental setup. Audit trails for spectral recalibration events are maintained per GLP Annex 11 guidelines.

Applications

• Fluorescence Microscopy: BrightLine® single- and multi-band filter sets for FISH, FRET, and spectral unmixing; Pinkel- and Sedat-configured cubes for simultaneous 3–5 color acquisition
• Laser-Based Systems: LaserMUX™ combiner/splitter optics for multi-laser excitation; MaxLine® clean-up filters for diode-pumped solid-state (DPSS) and fiber lasers
• Raman Spectroscopy: RazorEdge® high-pass filters with “E”, “U”, and “S” grade edge sharpness for 532 nm, 633 nm, and 785 nm excitation; EdgeBasic® cost-optimized alternatives for teaching labs and QC screening
• Multiphoton Imaging: Broadband dichroics with >95% reflection from 680–1080 nm and >90% transmission from 400–650 nm for dual-channel emission detection
• Clinical Diagnostics: CE-marked FISH-specific filter sets compliant with IVD Directive 98/79/EC for in vitro cytogenetic testing platforms

FAQ

Are Semrock filters compatible with immersion oil objectives?
Yes—Semrock’s hard-coated filters exhibit no delamination or spectral shift when exposed to standard immersion oils (n = 1.518), provided proper cleaning protocols are followed.
Do you provide spectral data for custom-incidence angles beyond 45°?
Yes—custom angular performance data (0°–60° incidence) and polarization-dependent transmission/reflection curves are available upon request for system integration validation.
Can Semrock filters be used in vacuum or low-humidity environments?
All standard filters are rated for operation in ambient to 10⁻⁴ Torr vacuum; outgassing rates comply with NASA ASTM E595 specifications for space-qualified optics.
How often should spectral recalibration be performed?
Under normal lab conditions, recalibration is recommended every 24 months or after any mechanical shock event exceeding 50 g; traceable recalibration services are available through Semrock’s ISO/IEC 17025-accredited metrology lab.
Is there a minimum order quantity for OEM filter mounts?
No—Semrock supports prototype-scale orders (as low as one unit) with full mechanical drawings, GD&T annotations, and mounting torque specifications included in the delivery package.