产品: Bandpass Filters
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Bandpass Filters
Optical bandpass filters are precision components designed to selectively transmit light within a specified wavelength range while blocking unwanted wavelengths. TIHOT Optics provides high-accuracy bandpass filters spanning UV to IR wavelengths, featuring hard dielectric coatings for superior transmission and blocking characteristics.
Our bandpass filters deliver exceptional performance in precision wavelength control, high durability, and are available with custom wavelength configurations to meet diverse application requirements across laser systems, imaging equipment, spectroscopy, and analytical instrumentation.
Key Features
Wide Wavelength Coverage Center wavelength range from 200 nm to 2500 nm, covering ultraviolet, visible, and near-infrared spectral regions for comprehensive application support.
Excellent Transmission Efficiency High transmission >90% within passband ensures maximum signal throughput and optimal system performance with minimal optical loss.
Superior Out-of-Band Blocking Steep edge transitions and excellent blocking up to OD6 provide minimal interference from unwanted wavelengths, ensuring high signal-to-noise ratios.
Durable Hard Dielectric Coating Hard multilayer dielectric coating ensures long-term stability, environmental resistance, and maintains performance under demanding operating conditions.
Multiple Spectral Versions Available in UV, visible, and NIR versions to suit various application requirements from fluorescence microscopy to laser systems.
Broad System Compatibility Compatible with laser systems, imaging equipment, spectroscopy instruments, and analytical devices for versatile integration.
Typical Specifications
| Parameter | Specification Range | Description |
|---|---|---|
| Center Wavelength (CWL) | 200–2500 nm | Customizable for UV, VIS, or IR applications |
| Bandwidth (FWHM) | 1–100 nm | Narrowband or broadband options available |
| Peak Transmission (T%) | >85% typical, up to >95% | Within passband wavelength range |
| Blocking Level | OD3–OD6 | Out-of-band rejection for unwanted wavelengths |
| Substrate Material | Fused Silica, Borosilicate, BK7 | Material selected by spectral region requirements |
| Coating Type | Hard dielectric multilayer | High durability and thermal stability |
| Diameter/Size | 5–100 mm (custom available) | Round or square shapes available |
| Surface Quality | 40–20 / 20–10 | Precision optical grade per MIL-PRF-13830B |
| AOI (Angle of Incidence) | 0°–5° | Minimal wavelength shift within specification |
| Operating Temperature | -40°C to +80°C | Stable performance in harsh conditions |
| Parallelism | <3 arcsec | Minimizes beam deviation in precision setups |
| Thickness Options | 0.5–5 mm | Accommodates different mounting requirements |
Applications
Our bandpass filters serve critical functions across multiple industries and research fields:
Laser Systems & Laser Line Isolation – Isolate specific laser wavelengths while blocking ambient light and harmonics, improving system accuracy in rangefinders, targeting systems, and laser processing equipment.
Fluorescence Microscopy & Imaging – Enable multi-channel fluorescence detection by isolating specific fluorophore emissions (FITC, TRITC, Cy3, Cy5) from excitation light in confocal and widefield microscopy systems.
Spectroscopy & Chemical Analysis – Provide wavelength-specific detection in Raman spectroscopy, absorption spectroscopy, and liquid chromatography-mass spectrometry (LC-MS) for precise molecular identification.
Machine Vision & Color Analysis – Ensure accurate color separation and detection in industrial inspection systems, quality control applications, and automated sorting equipment.
Custom Bandpass Filter Solutions
TIHOTOPTICS offers comprehensive customization services to meet specific application requirements. Our engineering team can design and manufacture bandpass filters with custom center wavelengths, bandwidths, substrate materials, and physical dimensions tailored to your exact specifications.
Custom Options Available:
- Custom center wavelengths across 200–2500 nm range
- Narrowband (1–10 nm) or broadband (50–100+ nm) configurations
- Non-standard sizes and shapes (rectangular, square, custom diameters)
- Enhanced coating designs for high-power laser applications
- Specialty substrate materials for extreme environments
- Multi-cavity designs for ultra-narrow bandwidths
- Custom blocking ranges and OD levels
Contact our technical sales team to discuss your requirements and receive a detailed quotation for custom bandpass filter solutions.
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