Semrock VersaChrome® Tunable Optical Filter
| Brand | Semrock |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Import Status | Imported |
| Model | VersaChrome® TBP01 Series |
| Pricing | Available Upon Request |
Overview
The Semrock VersaChrome® Tunable Optical Filter is a precision interference-based spectral selection device engineered for high-stability, angle-tuned wavelength selection in demanding optical systems. Unlike liquid crystal or acousto-optic tunable filters (AOTFs), the VersaChrome® series employs all-dielectric hard-coated multilayer thin-film technology deposited via ion-beam sputtering—ensuring exceptional thermal stability, low polarization dependence, and minimal wavefront distortion. Its operational principle relies on angular tuning of incident collimated light: as the angle of incidence (AOI) changes relative to the filter’s surface normal, the effective optical path length within the interference stack shifts, resulting in a predictable and repeatable shift in center wavelength (CWL) across the visible to near-infrared spectrum. This deterministic relationship enables precise, motorized or manual spectral scanning without mechanical moving parts in the optical path—making it ideal for integration into automated fluorescence microscopes, hyperspectral imaging platforms, and multi-laser excitation setups where spectral agility and long-term calibration retention are critical.
Key Features
- Angle-tunable center wavelength (CWL) with sub-nanometer repeatability over thousands of tuning cycles
- Hard-coated dielectric interference filters with <1 nm spectral shift after 1,000 thermal cycles (−40 °C to +85 °C)
- High transmission (>90% peak) and deep out-of-band blocking (OD6+ beyond ±50 nm from CWL)
- Low polarization sensitivity (<5% transmission variation between s- and p-polarized light at design AOI)
- Standard 25 mm × 36 mm rectangular format with AR-coated substrate faces (R<0.25% per surface)
- Five-year limited warranty and 30-day replacement policy for manufacturing defects
- Custom CWL, bandwidth, and substrate specifications available with typical lead time of seven business days
Sample Compatibility & Compliance
The VersaChrome® filter operates optimally with collimated input beams (beam divergence < 0.5°) and is compatible with standard C-mount, SM1-threaded, or custom optomechanical mounts. It supports both continuous-wave and pulsed laser sources up to 10 W/cm² average power (for 1064 nm, 10 ns pulses at 10 Hz). All models comply with ISO 9001-certified manufacturing protocols and meet RoHS 2015/863/EU directives. Filter performance data—including spectral transmission curves, angular tuning maps, and environmental stress test reports—are supplied with each unit and traceable to NIST-calibrated spectrophotometers. For regulated environments (e.g., clinical imaging or pharmaceutical R&D), documentation supports GLP audit readiness and aligns with key clauses of FDA 21 CFR Part 11 regarding instrument qualification records.
Software & Data Management
While the VersaChrome® filter itself is a passive optical component, its integration into automated systems is facilitated by published angular tuning lookup tables (CSV and MATLAB-compatible .mat files) for each model number. These datasets define CWL vs. AOI with ±0.1° angular resolution and include uncertainty budgets derived from interferometric metrology. Third-party motion controllers (e.g., Thorlabs KDC101, Newport ESP301) can be programmed using these tables to achieve closed-loop spectral positioning. Optional API wrappers (Python and LabVIEW) are available upon request to interface with OEM imaging software stacks, enabling synchronized acquisition across wavelength sweeps. All calibration data and firmware update logs are stored locally on host systems—supporting full traceability required under ISO/IEC 17025-accredited laboratory practices.
Applications
- Fluorescence lifetime imaging (FLIM) and spectral unmixing in confocal and widefield microscopy
- Push-broom and snapshot hyperspectral imaging for remote sensing and biomedical tissue analysis
- Laser line selection and rejection in multi-wavelength Raman spectroscopy systems
- Dynamic spectral calibration of astronomical instrumentation and spaceborne spectrometers
- Real-time process monitoring in semiconductor wafer inspection and photolithography alignment
- Time-resolved pump-probe experiments requiring rapid, non-mechanical spectral gating
FAQ
What is the maximum recommended angle of incidence for stable tuning?
The standard operating range is ±8° from the design AOI; extended tuning beyond ±10° may induce beam walk-off or increased polarization splitting.
Can the filter be used with divergent or focused beams?
No—collimation is mandatory. Focused illumination causes spatially varying CWL across the aperture and degrades spectral purity.
Is there a difference between “Tunable” and “Extended Overlap” filter variants?
Yes: Tunable models (e.g., TBP01-547/15) provide discrete, high-transmission bands optimized for single-wavelength selection; Extended Overlap models (e.g., TBP01-564/14) feature broader passbands designed for seamless stitching across adjacent tuning ranges.
Do you supply mounting hardware or kinematic tilt stages?
Semrock does not manufacture mounts, but we provide dimensional drawings and recommend industry-standard kinematic mounts (e.g., Thorlabs KM100 or Standa 8MT173-1) with ±0.001° angular resolution.
How is spectral calibration verified prior to shipment?
Each filter undergoes spectral verification using a calibrated Ocean Insight QE Pro spectrometer and a stabilized halogen-deuterium source, with raw data and uncertainty analysis included in the certificate of conformance.
