Precision Grade Round Coated Optical Window
The round coated optical window is a fundamental optical component used for optical path isolation and protection. Installed at the entry point or critical internal locations of an optical system, it effectively prevents contamination from dust, moisture, and mechanical particles while enabling high-efficiency light transmission with minimal alteration to the original optical performance. By applying various functional optical coatings to the substrate surface, these windows can meet diverse application needs such as anti-reflection, high reflection, beam splitting, or spectral filtering.
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This product is widely used in laser systems, imaging equipment, optical inspection, optical communication, and industrial optical systems. It is suitable for scenarios requiring high transmission, stability, and environmental resilience.
Key Features
High Transmission Design
Utilizes multi-layer dielectric anti-reflective (AR) coatings to significantly reduce surface reflection losses within the designed wavelength range, thereby enhancing overall system optical efficiency.
Multiple Coating Options
Supports AR, High-Reflective (HR), beamsplitter, and functional filter coatings to accommodate different optical path configurations and application requirements.
Superior Optical Quality
Available in various grades of surface figure accuracy and surface quality to effectively control wavefront distortion and scattering.
Suitable for Laser Applications
Offers good laser damage resistance under specified conditions, making it appropriate for low to medium-power laser systems.
Robust Structure & Environmental Durability
Capable of stable operation across a wide temperature range, suitable for long-term use in both laboratory and industrial environments.
Typical Applications
- Laser system optical path protection and output windows
- Optical isolation in imaging systems and inspection equipment
- Protective windows for optical communication and optoelectronic modules
- Industrial optical equipment and automation systems
- Scientific research experiments and precision optical instruments
Materials & Manufacturing
Round coated optical windows typically use BK7 or Fused Silica as substrate materials, offering a balance of excellent optical transmission and mechanical stability. Optical surfaces undergo high-precision polishing to meet different grades of surface figure and flatness requirements.
The coating process employs multilayer dielectric thin-film designs, with the coating stack optimized for the target working wavelength and application. Coatings can be applied to either one or both surfaces as required. The edges are often beveled or rounded to enhance handling safety and assembly reliability.
Customization & Design Notes
When selecting or customizing a round coated optical window, it is recommended to prioritize consideration of the following factors:
- Operational wavelength and bandwidth
- Angle of incidence (normal or small angle)
- Requirements for transmission rate, reflectance, and wavefront quality
- Laser power density and operational mode (e.g., CW, pulsed)
- Ambient temperature and mechanical conditions
Matching the material, coating type, and optical specifications appropriately is crucial for ensuring long-term, stable system performance.
Parameter Specifications Table (Customizable)
Specification Items | Available Range / Specification | Notes |
Product Type | Round Coated Optical Window | Non-imaging optical window |
Diameter | Ø1 mm – Ø150 mm (Customizable) | Non-standard sizes available |
Thickness | 0.5 mm – 10 mm (Customizable) | Selected based on strength & application |
Substrate | BK7 / Fused Silica / Custom | Based on wavelength & environment |
Spectral Range | 200–1100 nm / 1064 nm / Custom | Coatings designed for specific bands |
Coating Type | AR / HR / Beamsplitter / Filter | Single or dual-sided |
Transmission (AR) | >99% (Typical @ design band) | Near-normal incidence |
Surface Flatness | λ/10, λ/8, λ/4 @632.8 nm | Interferometric-grade accuracy |
Surface Quality | 20-10 / 40-20 Scratch-Dig | Minimizes scattering |
Parallelism | ≤1 arcmin | Controls beam deviation |
Laser Damage Threshold (LIDT) | >10 J/cm² @1064 nm | Condition-dependent |
Operating Temperature | -40°C ~ +200°C | Industrial & laboratory environments |
Edge Treatment | Beveled / Rounded | Improves handling and mounting safety |
