Precision-Bonded Non-Polarization Beamsplitter Cube
Non-Polarization Beamsplitter Cube equalizes incident light into transmitted and reflected light while maintaining stable optical path direction and minimizing polarization dependence. The device is suitable for interferometry, optical communication, microscopy, and other high-precision optical systems to ensure spectroscopic consistency and stability of experiments or systems.
- Spectroscopic Equalization: The intensity of transmitted light is nearly consistent with the reflected light, with low polarization dependence.
- Spectral ratios can be customized: Standard 50/50, 30/70, or customized according to system needs.
- High optical quality: Surface flatness λ/8 @632.8 nm, low wavefront distortion.
- High transmittance and high reflectivity: Multi-layer dielectric film design, T>90%, R>90%, low optical loss.
- Laser Tolerance: Damage threshold >10 J/cm² @1064 nm for medium to high power laser systems.
- Environmental stability: Operating temperature -40°C ~ +200°C, suitable for industrial and experimental environments.
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Detailed Description
Non-Polarization Beamsplitter Cube consists of two right-angled prisms bonded in an inclined plane by means of a high-precision dielectric membrane. The incident light is equalized into transmitted light and reflected light while maintaining the original polarization state. Film thickness and refractive index are optimized to reduce polarization dependence and ensure spectroscopic consistency. The compact construction and precision assembly ensure a stable optical path and low angular deviation. The device is suitable for high-precision optical applications such as interferometers, optical communication modules, and microscopic imaging systems, ensuring the stability of experimental and system performance.
Typical Applications
- Interferometer and wavefront detection system
- Optical communication module beam separation
- Scientific Imaging and Microsystems
- Optical testing and precision measuring instruments
- Laser system calibration, polarization control, and power monitoring
Materials and Manufacturing Processes
The optical material is BK7 or fused silica, which has high optical transmittance and a low coefficient of thermal expansion. The optical surface is polished to 20-10 Scratch-Dig standard to interference-level flatness. The inclined surface adopts a multi-layer dielectric film, and the inlet and outlet surfaces are supplemented with AR film (R <0.5%) to improve transmission efficiency and reduce optical loss. Precision assembly ensures angular tolerance and optical path consistency, ensuring spectroscopic equalization and stable performance. It is recommended to install it in a package to reduce the impact of temperature and humidity changes on performance.
Design Considerations
When designing and installing a Non-Polarization Beamsplitter Cube, the appropriate spectral ratio should be selected according to the system needs, and the film layer of the operating band should be matched to reduce reflection losses. During the installation process, the fixed surface should be flat, and the optical axis should be concentric to avoid deviation. For high-precision systems, encapsulated or fixed installations are recommended to reduce the impact of environmental factors on performance and ensure long-term stability.
Technical Data Sheet
Parameters | Typical Specifications | Description |
Operating wavelengths | 400–1100 nm | Cover visible to near-infrared bands |
Split ratio | 50/50, 30/70 or custom | Output light intensity equalization with low polarization dependence |
Polarization-dependent | <5% | Small difference in spectroscopy between s light and p light |
Transmittance/reflectance | T >90%, R >90% | Multilayer media film |
Flatness | λ/8 @632.8 nm | Low wavefront distortion |
Surface quality | 20-10 Scratch-Dig | Interference-grade optical surface |
Substrate | BK7 / Fused silica | High optical quality glass |
Anti-reflective coating | R <0.5% | Optimizes transmission efficiency |
Damage threshold | >10 J/cm² @1064 nm | For medium and high power lasers |
Operating temperature | -40°C ~ +200°C | Suitable for industrial and experimental environments |
