The OPTOStokes LP750nm is a specialized ultra-thin longpass filter designed for next-generation optical systems where space and weight are at a premium. With a substrate thickness of just 0.3mm, this component minimizes optical path length shift and fits easily into extremely compact housings, making it a preferred choice for portable devices and integrated sensors.
Despite its slender profile, the LP750nm delivers robust optical performance. It effectively blocks the entire visible spectrum and ultraviolet light from 350nm up to 700nm with transmission levels below 1 percent. In the Near-Infrared (NIR) region, it opens up a clear transmission window from 750nm to 1100nm, achieving an average throughput greater than 90 percent. This combination of deep visible blocking and high NIR transmission is essential for creating high-contrast images in NIR imaging applications without the bulk of standard optics.
Technical Specifications
The following table details the optical and mechanical specifications for this ultra-thin filter. The corrected transmission range ensures reliable performance for NIR-specific applications.
| Feature | Specification |
|---|---|
| Product Model | LP750nm Longpass Filter |
| Passband (Transmission) | 750nm - 1100nm (Avg T > 90%) |
| Blocking Range | 350nm - 700nm (Avg T < 1%) |
| Thickness | 0.3mm (Ultra-Thin) |
| Surface Quality | 60/40 (Scratch/Dig) |
Typical Applications
The 0.3mm thickness combined with a 750nm cut-on makes this filter uniquely suited for:
- Compact Sensors & Handheld Devices: Ideal for integration into mobile scanners, gesture recognition modules, and portable biometrics where Z-height is limited.
- UAV & Drone Cameras: Reduces payload weight while enabling vegetation analysis (NDVI) or night vision capabilities.
- Covert Surveillance: Blocks visible red glow from IR illuminators (850nm/940nm) while allowing the camera to see in the dark.
- Focus Correction: The thin substrate minimizes focus shift when placed behind a lens in imaging systems.
Customization & Precision Handling
Handling ultra-thin glass requires expertise. OPTOStokes offers specialized custom optical filter processing for delicate substrates.
- Micro-Sizing: We can dice 0.3mm wafers into micro-filters as small as 2mm x 2mm for sensor-level bonding.
- Shape Complexity: Available in round, square, or custom shapes to match your mechanical design.
- Coatings: Custom anti-reflective (AR) coatings can be applied to further optimize transmission.
Agile Manufacturing for Modern Optics
Don't let component size limit your design innovation.
OPTOStokes specializes in the difficult-to-manufacture specs that standard suppliers avoid. Whether you need a few prototypes for a new wearable device or volume production for consumer electronics, we have the stock and the capability to deliver.
Need a quote for ultra-thin optics? Contact our engineering team at sales@optofilters.com to discuss your project requirements.
