Shanghai Longway Special Glass Co., Ltd.
| Payment Terms | D/P,T/T,Western Union |
| Supply Ability | 1000 Pieces per Month |
| Packaging Details | electrolytic capacitor paper,foam,carton |
| Structure | Optical Dome |
| Surface | Optical grade |
| Transmission | over 90% |
| Coating | available |
| Processing | Grinding and polishing |
| OEM | available |
| Brand Name | LONGWAY |
| Model Number | LW160920158 |
| Certification | ISO9001 |
| Place of Origin | Shanghai, China |
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Product Specification
| Payment Terms | D/P,T/T,Western Union | Supply Ability | 1000 Pieces per Month |
| Packaging Details | electrolytic capacitor paper,foam,carton | Structure | Optical Dome |
| Surface | Optical grade | Transmission | over 90% |
| Coating | available | Processing | Grinding and polishing |
| OEM | available | Brand Name | LONGWAY |
| Model Number | LW160920158 | Certification | ISO9001 |
| Place of Origin | Shanghai, China | ||
| High Light | BK-7 Glass Optical Dome ，Optical Dome for Precision Instruments ，Low Thermal Expansion Optical Dome | ||
Low Thermal Expansion BK-7 Glass Optical Dome for Precision Instruments
Material:
BK-7 Optical Glass: A borosilicate crown glass composed of silica (69–72%), boron oxide (10–13%), and potassium oxide (8–10%). Renowned for high optical homogeneity and low impurity content.
Low Thermal Expansion Design: Engineered to minimize dimensional changes under temperature fluctuations.
Key Properties:
Thermal Stability: Extremely low coefficient of thermal expansion (CTE: ~7.1 × 10⁻⁶/K), ensuring minimal shape distortion in varying temperatures (-50°C to 150°C).
Optical Clarity: High transmission (>90%) across visible to near-infrared (350–2000 nm) wavelengths.
Mechanical Durability: Resistant to scratches, abrasion, and moderate chemical exposure (e.g., mild acids, humidity).
Homogeneity: Exceptional material uniformity, reducing light scattering and wavefront distortion.
Function:
Thermal Deformation Resistance: Maintains precise optical alignment in temperature-sensitive environments.
Environmental Protection: Seals precision instruments from dust, moisture, and mechanical stress.
Optical Performance: Preserves image/resource integrity by minimizing thermal-induced focal shifts or aberrations.
Wide Field of View: Hemispherical shape enables unobstructed 180° imaging or sensing.
Applications:
Space & Satellite Systems: Protects sensors in satellites/telescopes exposed to extreme thermal cycling.
Laser & Metrology Equipment: Ensures stability in laser cavities, interferometers, or coordinate-measuring machines (CMMs).
Aerospace Sensors: Shields navigation/guidance systems in aircraft/drones operating at high altitudes.
High-Precision Manufacturing: Used in semiconductor lithography or industrial inspection tools requiring micron-level accuracy.
Technical Advantages:
Dimensional Stability: Retains shape and optical alignment despite rapid temperature changes.
Broad Wavelength Compatibility: Suitable for multispectral applications (visible, NIR).
Custom Geometry: Available in diameters from 20mm to 500mm, with tailored thickness for load-bearing needs.
Target Industries:
Aerospace, defense, photonics, semiconductor manufacturing, metrology, and scientific research.
| Name | Optical dome |
| Material | Optical glass, Qurartz glass, borosilicate glass |
| Diameter Tolerance | +0/-0.15 mm |
| Thickness Tolerance | +/-0.15mm |
| Processed | by grinding, polishing |
| Surface Quality | 80/50,60/40,40/20 |
| Material Quality | no scratches and air bubble |
| Transmission | above 90% |
| Chamfer | 0.1-0.5 mm x 45° |
| Surface Coating | Available |
| Usage | Photography, Lighting system, Optics |
Company Details
Business Type:
Manufacturer,Agent,Exporter,Trading Company,Seller
Year Established:
2008
Total Annual:
1000000-5000000
Employee Number:
30~100
Ecer Certification：
Verified Supplier
Introduction Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted partner for busines... Introduction Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted partner for busines...
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