DM700 Dichroic Mirror: 700 nm Cut-Off for NIR Fluorescence & Laser Sorting
The OPTOStokes **DM700 Dichroic Mirror** is a premium 45° angle of incidence (AOI) optical filter, expertly designed for high-efficiency spectral separation at the critical 700 nm threshold. This mirror is essential for next-generation systems in biomedical imaging, particularly those utilizing Near-Infrared (NIR) fluorescence, where maximizing NIR signal collection while deeply rejecting visible excitation light is paramount.
Critical Technical Specifications
Engineered on a thin 1.1 mm substrate, the DM700 is optimized for minimal beam displacement and seamless integration into standard optical cubes and compact OEM systems.
| Parameter | Specification |
|---|---|
| Nominal Cut-off Wavelength | 700 nm |
| Incidence Angle (AOI) | 45° (Degrees) |
| Transmission Performance (T) | > 95% T from 715 nm to 900 nm |
| Reflection/Blocking Performance (R) | > 99% R or T < 1% from 350 nm to 675 nm |
| Substrate Thickness | 1.1 mm (Thin Substrate) |
High-Performance Red-Edge Separation
The **DM700 beam splitting filter** functions as a highly selective spectral switch. At the standard 45° AOI, it ensures optimal separation efficiency:
- Deep Rejection (Reflection): Wavelengths from the UV up to the deep red (350 nm - 675 nm) are strongly reflected (> 99% R). This is crucial for reflecting red laser excitation sources (e.g., 635 nm or 660 nm) toward the sample.
- High NIR Throughput (Transmission): The NIR light above 715 nm is transmitted with an **Extremely High Efficiency** (> 95% T), ensuring maximum collection of faint NIR fluorescence signals.
- System Integration: The thin 1.1 mm glass thickness minimizes aberrations and is ideal for systems where multiple filters are stacked or positioned close to the image plane.
Core Applications
The DM700 is widely used in systems requiring precise isolation of NIR light from visible laser interference:
- NIR Optics Fluorescence Imaging: Perfect for collecting emission signals from NIR dyes (700 nm to 900 nm range), such as Indocyanine Green (ICG) or other IR-markers, while reflecting the shorter excitation light.
- Laser Line Clean-up and Sorting: Used in flow cytometry and analytical instruments to combine or separate visible lasers (reflected) from NIR detection channels (transmitted).
- Red Laser Combination: Acts as a key beam splitter in multi-laser confocal systems to manage 660 nm or 635 nm laser paths.
OPTOStokes Quality and Customization
OPTOStokes provides industry-leading **DM700 Dichroic Mirrors** with guaranteed spectral performance and robust, durable custom coatings. Our 45° AOI design is available in various standard sizes from stock to support rapid development and high-volume manufacturing.
If your application demands unique specifications—such as a different cut-off wavelength (+/- 10 nm), alternative AOI (0° to 50°), or custom sizing—our specialized high precision coating capabilities allow us to deliver precise, on-spec solutions that accelerate your product launch.
Facing a complex NIR optical design challenge? Discuss your specifications with our experts.
Ensure your system achieves optimal signal-to-noise ratio and unmatched efficiency by partnering with OPTOStokes.
Email: sales@optofilters.com | Visit: www.optokens.com
