Laser Filter Description
- Features:
- High Peak Transmission: The laser filters feature exceptional peak transmission (>80%) for the desired wavelengths.
- Excellent Blocking (OD > 4.0): These filters ensure excellent out-of-band blocking, making them ideal for highly sensitive applications.
- Wide Application Range: Perfect for use in laser-based fluorescence instrumentation, Raman spectroscopy, and medical/analytical laser systems.
- Dielectric Coating Technology: The filters are equipped with advanced IBS (Ion Beam Sputtering) coating for durability against harsh environments.
- Customizable Specifications: Available in a range of standard and customized options to meet specific wavelength needs.
- General Description:
Laser filters are critical components designed to reject a range of wavelengths while allowing the transmission of the desired wavelengths. They are used in various laser applications, including those involving diode lasers, LEDs, and gas lasers. Shape Optics Technologies offers an extensive range of laser line filters, particularly ideal for systems involving precise monochromatic light output. These filters work to enhance the clarity of light signals by rejecting unwanted secondary emissions and plasma, especially from gas lasers, while ensuring minimal thermal load on other optical components.
Our laser filters offer ultra-narrow bandwidth coatings that help in improving signal quality, especially for high-precision applications such as laser-based fluorescence, Raman spectroscopy, and medical diagnostics. The filters are designed with high peak transmission and exceptional blocking properties to deliver superior performance in the intended wavelength range. They are specifically crafted to block harmful wavelengths and allow the transmission of only the necessary light, resulting in more efficient and accurate laser-based measurements.
- Spectrum Transmission Curves:
If the standard components do not meet your needs, Shape Optics Technologies is able to provide customized solutions tailored to your exact application. The spectrum transmission curve will be adjusted based on your specific laser wavelength requirements, and we will ensure that the filter performs optimally for your application.
- Coating Quality:
- Adhesion Test: Compliant with MIL-C-675C military standards. A tape that meets LT-90 specifications was applied to the lens film layer, and after performing three vertical removals, no blistering or peeling occurred.
- Temperature Test: Test pieces were exposed to temperatures of -62±1℃ and 71±1℃. After room temperature exposure, the adhesion test was repeated, showing no film detachment.
- Abrasion Resistance Test: Conforms to MIL-C-675C and CCC-C-440 standards. The abrasion test involved 25 cycles of 1.0 lbs (0.45 kg) pressure applied with gauze, resulting in no damage to the surface.
- Humidity Test: Under controlled temperature and humidity (49 ±2℃, 95%-100% humidity), no defects, peeling, or scratches were observed after 24 hours.
- Solvent and Cleaning Testing: Exposed to acetone and alcohol at room temperature for 10 minutes each, followed by drying and cleaning with alcohol-soaked cotton. No signs of peeling or scratches were observed.
- Salt Spray Test: After 100 hours in a 35°C saltwater environment with 5% concentration, no damage was observed.
- Standard Specifications:
| Item | Feature |
| Minimum Size | Φ2mm or 2mm × 2mm |
| Maximum Size | Φ50mm or 55mm × 55mm |
| Surface Quality | 80-50 |
| Damage Threshold | 20J/cm², 10ns pulse |
| Typical Wavelength | 488nm, 532nm, 632.8nm, 808nm, 980nm, 1064nm |
| Environmental Conditions | MIL-STD-810E, Method 507.3 |
| Operating Temperature | -40°C ~ +60°C |
| Blocking | OD > 5 at both Ruby (694nm) and YAG (1064nm) lasers |
| Pinhole Free | Pinhole-free over the clear aperture |
| Compliance | MIL-Spec Compliance |
- General Applications and Examples:
Laser filters are vital for various high-precision applications that require strict wavelength control, including:
- Laser-based Fluorescence Instrumentation: Filters block unwanted wavelengths to ensure only the desired fluorescence signal is detected, enhancing the accuracy of fluorescence microscopy and other imaging techniques.
- Raman Spectroscopy: These filters allow only the Raman scattered light of a specific wavelength to pass, improving the signal-to-noise ratio for accurate measurements.
- Analytical and Medical Laser Systems: Essential for medical diagnostics and analytical tools where precise control of laser wavelengths is critical.
- Environmental Monitoring: Used in systems to analyze gases or chemical compounds by selecting specific wavelengths.
Custom solutions are available for applications such as automotive systems, advanced diagnostics, or military applications where higher thresholds and extreme durability are required.
- SOT Strengths and Capabilities:
Shape Optics Technologies is recognized for its advanced capabilities in precision optics manufacturing. Our filters are crafted with cutting-edge technology, offering unmatched reliability, precision, and performance. SOT stands out with its capacity to produce filters that meet the strictest specifications for laser applications, ensuring that each product offers optimal performance. We offer a vast array of customizable products designed to meet the exacting demands of various industries, from medical to environmental monitoring. Our expertise in coating technologies guarantees that every filter performs flawlessly under challenging operational conditions.
- Standard Products:
| CWL | Tpeak | FWHM | Blocking |
| 488nm | 85% | 20nm | OD 4.0 |
| 532nm | 85% | 15nm | OD 4.0 |
| 808nm | 85% | 10nm | OD 4.0 |
| 1064nm | 85% | 12nm | OD 4.0 |
Customization options are available upon request to meet specific wavelength requirements and operational conditions.
