DM647 Dichroic Mirror: 647 nm Laser Beam Splitter for Fluorescence Systems
The OPTOStokes **DM647 Dichroic Mirror** is a high-performance optical component specifically engineered for demanding multi-wavelength applications, primarily serving as a key element in advanced fluorescence microscopy and laser beam combination systems. With its sharp cut-off near $647\text{nm}$, this mirror efficiently separates short-wavelength excitation light from longer-wavelength emission signals, ensuring maximum signal collection and minimal cross-talk.
Critical Technical Specifications
Our DM647 mirror is built on a thin $1.1\text{mm}$ substrate, optimizing it for integration into standard filter cubes and high-speed, compact optical paths.
| Parameter | Specification |
|---|---|
| Cut-off Wavelength ($\lambda_{\text{cut}}$) | 647 nm (Nominal) |
| Incidence Angle (AOI) | 45° (Degrees) |
| Transmission Performance (T) | > 95% T from 660 nm to 850 nm |
| Reflection/Blocking Performance (R) | > 99% R or T < 1% from 400 nm to 635 nm |
| Substrate Thickness | 1.1 mm (Thin Substrate) |
Engineered Performance and Optical Advantages
The **DM647 Dichroic optical filter** is defined by its ability to provide extreme spectral separation at a 45° angle of incidence (AOI), making it the optimal choice for creating multi-wavelength optical channels.
- High Efficiency Separation: The mirror provides **Extremely High Transmission** ($> 95\%$) in the long-wavelength region ($660\text{nm} - 850\text{nm}$), ensuring maximal signal collection (e.g., Cy5 emission).
- Deep Rejection: It delivers **Deep Rejection** of the short-wavelength excitation light ($400\text{nm} - 635\text{nm}$), preventing laser or excitation noise from reaching the detector.
- Thin Substrate Advantage: The $1.1\text{mm}$ thickness helps minimize beam displacement, aberrations, and system footprint, essential in complex, multi-element optical assemblies.
Core Applications
The precise $647\text{nm}$ cut-off makes this mirror indispensable for several specialized fields:
- Fluorescence Microscopy: Ideal for systems using red-emitting dyes like Alexa Fluor 647 or Cy5, where the mirror reflects the $647\text{nm}$ excitation laser and efficiently transmits the longer-wavelength emission signal to the camera or detector.
- Laser Beam Combining: Used as an beam splitter to combine a laser beam (e.g., $630\text{nm}$ laser reflected) with a longer-wavelength signal (e.g., Near-IR transmitted).
- Confocal and Widefield Systems: Critical for separating fluorescence excitation and emission paths in research-grade instruments.
OPTOStokes: Your Trusted OEM Optics Partner
As a leader in thin film coatings, OPTOStokes offers both **in-stock** DM647 models and **high-level customization** to meet your exact system requirements. Our robust production line ensures world-class quality and reliable, predictable delivery schedules for your high-volume needs.
Whether you require alternative cut-off wavelengths, tighter AOI tolerances, or different substrate thicknesses, our optical directors are prepared to deliver custom optical components that guarantee system performance.
Need to integrate the DM647 or require custom wavelength separation optics?
Contact our technical sales team for immediate availability, detailed spectral curves, or to discuss your custom project specifications.
Email: sales@optofilters.com | Visit: www.optokens.com
