English
Although spherical lens and hemispherical lens belong to the category of optical lens, they have their own characteristics in structure and application. The spherical lens is known for its complete spherical structure, with spherical symmetry, so the optical focal length is fixed, often used in imaging optical systems, such as cameras, microscopes, etc., to ensure the stability of optical performance. The hemispherical lens, as the name suggests, is half of the spherical lens, and its shape is somewhat different from that of the spherical lens, losing spherical symmetry, resulting in possible differences in curvature radius and optical focal length at different locations.
Half-Ball lenses are variants of ball lenses, obtained by simply cutting the ball lenses in half.Due to ease of mounting brought by the one flat surface,they are ideal for applications where more compact designs are required , such as fiber communication, endoscopy, microscopy, optical pick-up devices, and laser measurement systems.
Normal | High Precision | Mfg.Limit | |
Material | Optical glass | Optical glass | Optical glass |
Diameter Tolerance | +0/-0.1mm | +0/-0.5mm | +0/-0.1 |
Surface Quality | 60-40 | 40-20 | 10-5 |
Diameter Ellipticity | 0.01 | 0.005 | 0.001 |
Clear Aperture | >80% | >85% | >90% |
Precise Hemispherical Design
High surface accuracy and excellent geometric symmetry ensure stable optical performance.
Precision manufacturing minimizes optical aberrations and enhances beam transmission quality.
Diverse Material Options
Available in BK7 optical glass, fused silica, sapphire, and other materials to meet different wavelength requirements.
Fused silica is ideal for applications ranging from UV to near-infrared (UV-NIR), while sapphire is better suited for harsh environments and high mechanical strength requirements.
Wide Wavelength Range
Supports a broad wavelength range from ultraviolet (UV) to infrared (IR), typically from 190 nm to 2000 nm, accommodating various optical applications.
High Transmission Efficiency
Anti-reflection (AR) coatings can be customized to reduce reflection losses and improve transmission efficiency. Common AR coating options include 400-700 nm (visible range) and 1310/1550 nm (telecommunication wavelengths).
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