English
The spherical lens is a lens with a fixed radius of curvature on the surface of the lens within the aperture of light. Spherical lenses are mainly divided into convex lenses, plano-convex lenses, plano-concave lenses, concave-convex lenses, double-concave through, etc., can be customized according to customer drawings or sample processing to meet customer's different application needs.
| Specifications | Normal | High Precision | Mfg. Limit |
| Material : | H-K9L | H-K9L | H-K9L |
| Design Index : | 1.5168 | 1.5168 | 1.5168 |
| Diameter Tolerance : | +0/-0.1mm | +0/-0.05mm | +0/-0.01mm |
| Thickness Tolerance : | +/-0.1mm | +/-0.05mm | +/-0.01mm |
| Focal Length Tolerance : | +/-2% | +/-1% | +/-0.5% |
| Centeration : | 3 arc min | 1 arc min | 10 arc sec |
| Surface Quality : | 60-40 | 40-20 | 10-5 |
| Surface Figure : | 3 Iambda | 2 lambda | 1 lambda |
| Surface Irregularity : | 1/4 lambda | 1/10 lambda | 1/20 Iambda |
| Clear Aperture : | >80% | >90% | 100% |
| Bevel : | +/-0.2*45 degree | +/-0.1*45 degree | +/-0.05*45degree |
The surface of a spherical lens looks like part of a sphere or cylinder, and the curves are the same throughout the surface. If a straight line is drawn to follow the curve, it will form a circle. Because of the simplicity of the design, spherical lens designs are usually cheaper.
Aspherical lens, from the center of the lens to the edge, the radius of curvature constantly changes, compared with the spherical lens, aspherical lens can be designed thinner, lighter, can effectively eliminate spherical lens aberration and spherical aberration, optimize the design of the use of the system, to provide better imaging effect, if you want to reduce the spherical aberration in the image, you should use aspherical lens.
Covering most of the materials from UV-visible-infrared, such as: visible glass, ultraviolet quartz, silicon, ZnSe, Sapphire and so on.
1. low production cost : The uniform shape of the spherical lens ensures a simple manufacturing process and a shorter production time, so the production cost is low .
2. reduce spherical aberration : by selecting the effective aperture, the spherical aberration can be reduced, thus improving the imaging quality
3. combination use to improve image quality : by combining multiple spherical lenses, the image quality can be further improved, although the space conditions of the optical system need to be considered.
First of all, the suitable material is selected and cut to the quoted size, and then the process of rough grinding, fine grinding, polishing, coating, gluing, assembly, etc.
It is mainly used to capture images and convey information. Spherical lens is one of the most common lens types, its design is simple, low cost, widely used in a variety of photography and video equipment. The spherical lens is characterized by a spherical surface, which allows the light to focus more evenly as it passes through the lens, resulting in a clear image. However, spherical lenses also have some disadvantages, such as edge distortion and chromatic aberration problems, which may affect the quality of the image in high-quality photography and video.
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