Shanghai Longway Special Glass Co., Ltd.
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High-accuracy Optical Glass Roof Prism For Minimal Distortion In Viewing System
Material:
1.Optical glass substrate (e.g., BK7 or fused silica) with high refractive index homogeneity (Δn ≤ ±2×10⁻⁶) for minimal wavefront distortion.
2.Precision-polished surfaces (λ/10 flatness) and dielectric coatings (broadband AR coatings at 400-700nm) to reduce reflections (<0.5% per surface).
Properties:
1.Minimal distortion: Roof angle accuracy of 90°±3 arcseconds ensures image fidelity without tilt or deviation errors.
2.High durability: Resists thermal shock (-30°C to 70°C) and mechanical stress, ideal for rugged applications.
3.Low chromatic aberration: Optimized glass selection mitigates wavelength-dependent dispersion.
Function:
1.Beam deviation: Redirects light at 180° while maintaining image orientation, critical for erecting systems.
2.Distortion correction: Compensates for aberrations in binoculars, rangefinders, and surveying instruments.
Applications:
1.Defense/Aerospace: Used in periscopes, HUDs, and targeting systems for accurate imaging under vibration.
2.Medical devices: Integrated into endoscopes and surgical scopes for clear, undistorted visuals.
3.Industrial metrology: Ensures precision in alignment tools and laser interferometers.
| Item | Optical Prism |
| 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 |
