The OPTOStokes LP680nm is a specialized longpass filter engineered to mark the precise transition between the visible spectrum and the Near-Infrared (NIR). By establishing a cut-on wavelength at 680nm, this component effectively eliminates visible light interference—blocking wavelengths up to 665nm—while acting as a transparent gateway for deep red filter and NIR applications.
Designed for high-fidelity optical systems, the LP680nm offers an average transmission greater than 90 percent across the 680nm to 1100nm range. This high throughput is essential for maximizing signal strength in low-light NIR imaging and sensor applications. With a tight blocking margin ending at 665nm, it provides superior separation of signals, making it an ideal choice for systems that require the suppression of standard red LEDs or HeNe laser lines while passing longer wavelengths.
Technical Specifications
The table below provides the verified optical and mechanical parameters for SKU 21106902. These specifications ensure reliable integration into R&D setups and OEM instruments.
| Feature | Specification |
|---|---|
| Model | LP680nm Longpass Filter |
| Passband (Transmission) | 680nm - 1100nm (Avg T > 90%) |
| Blocking Range | 350nm - 665nm (Avg T < 1%) |
| Thickness | 1.0mm |
| Surface Quality | 60/40 (Scratch/Dig) |
| Reference SKU | 21106902 |
Typical Applications
The spectral characteristics of the LP680nm make it highly effective for applications requiring visible noise reduction and NIR signal enhancement:
- Biomedical Imaging: Ideal for deep tissue imaging and fluorescence microscopy where excitation light (typically below 660nm) must be blocked to detect faint NIR emission.
- Machine Vision: Used in conjunction with 700nm-1000nm IR lighting to inspect products, ignoring color variations and ambient visible light.
- Surveillance: Enables discrete night vision by filtering out visible spotlights while allowing IR illuminators to function effectively.
- Chlorophyll Analysis: Helps in isolating specific fluorescence bands in agricultural sensing.
Customization & Manufacturing
OPTOStokes offers flexible options to fit your specific optical path. Whether you are developing a compact handheld device or a large benchtop instrument, our custom optical filters service adapts to your needs.
- Sizing: We cut to standard diameters (e.g., 12.5mm, 25mm) or custom squares and rectangles.
- Mounting: Available in standard filter rings or custom holders.
- Consistency: Strict quality control ensures lot-to-lot uniformity for volume production.
Accelerate Your Development
Stop waiting for lead times to catch up with your innovation.
At OPTOStokes, we prioritize keeping essential filters like the LP680nm in stock or ready for rapid modification. We help you move from prototype to production with speed and confidence.
Need technical advice or a quote? Our team of optical engineers is ready to assist. Email us at sales@optofilters.com for a quick response.
