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Cylindrical Lens
2025.01.20
Cylindrical Lens
Rough grinding | Fine grinding | polishing
1、Characteristics of cylindrical lens
The cylindrical lens has one-dimensional magnification function, which can effectively reduce spherical aberration and color aberration. Due to the special shape of the cylindrical lens, it will cause the convergence and divergence of the light to change in one direction, while remaining unchanged in the other direction. This characteristic gives cylindrical lens a unique advantage in changing the size, shape and orientation of the image.
2、Classification and shape
Cylindrical lens can be divided into many types according to their shapes and uses, including plano-convex cylindrical lens, plano-concave cylindrical lens, double-convex cylindrical lens, double-concave cylindrical lens, meniscus cylindrical lens, cylindrical cross-cylinder lens and shaped cylindrical lens. These different types of cylindrical lens have different optical properties and application scenarios.
3、Imaging principle and application
When the light is reflected or refracted by the cylindrical lens, it will be focused to the focal point or dispersed from the virtual focus. When the parallel beam is incident, the light will be focused into a straight line by the cylindrical lens. When the non-parallel beam is incident, the imaging results will vary due to different incident angles.
Apply
01
Telescope: Used to correct parallax, adjust light path, increase viewing Angle and focus light, etc., to help users observe distant objects more clearly.
02
Microscope: By adjusting the focal length and Angle, small objects can be clearly observed. Modern microscopes are also equipped with cylindrical lens imaging systems for real-time transmission and processing of images.
03
Electronic optical measurement verification: precisely control the propagation and focus of light to improve the accuracy and precision of measurement.
04
Laser scanner: Shaping the laser beam to meet specific scanning needs, improving the efficiency and accuracy of the scan.
05
Spectroscopy: Used for spectroscopy, focusing and other operations to help researchers obtain more accurate spectral information.
06
Fax and print typesetting scanning imaging systems: used for image scanning, transmission and processing to ensure image quality and clarity.
07
Computer image processing: cylindrical lens technology is used for real-time image transmission, analysis and processing.
08
Medical field: It is widely used in endoscope equipment such as gastroscope and laparoscope to help doctors observe the lesions in patients more clearly.
4、Production technology
01
Rough grinding: the square blank is glued to the mold to form a cylinder, and then the outer circle is processed to obtain a cylinder. For cylindrical lenses with different curvature radius, the rough grinding methods are different. For example, a cylindrical lens with a small radius can be formed by milling; Cylindrical lenses with more than medium radius of curvature can be roughed by an ordinary cylindrical grinder or a centerless grinder.
02
Fine grinding: on the basis of rough grinding to further remove the excess part, so that the cylindrical lens to achieve the required accuracy and surface quality. It is necessary to turn the cylinder regularly during the grinding process to avoid grinding into a cone.
03
Polishing: There is a layer of felt with a thickness of 3~5mm on the polishing die, and the length of the polishing die is about 1/3 of the length of the cylindrical lens cylinder. The polishing process is similar to fine grinding, but the abrasives and processes used are different.
5、Sum up
Optical cylindrical lens have unique optical characteristics and wide application scenarios. With the continuous development of science and technology, the cylindrical mirror will be more and more widely used in various fields, but also put forward higher requirements for its production process and performance.
Contact us：0431-88057507
mailbox：
Lea@cf-optics.cn
bruce@cf-optics.cn
krystal@cf-optics.cn
yana@cf-optics.cn
oona@cf-optics.cn
Contact address：Yueda Technology Industrial Park, Yueda Road, Changchun High tech Zone
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