How does a laser infrared optical lens work?

How does a laser infrared optical lens work?

  Many people do not understand the working principle and operation of this laser infrared optical lens. Today, Xiangshun Optics will take you to understand their working principle.

 

1. The characteristics of the infrared optical system

The infrared optical system works in the infrared band, and it has the following characteristics: In the infrared optical system, there are many reflection forms. Generally, optical glass is opaque in the infrared band, so when there are not many types and sizes of infrared transmitting materials, the reflection form is generally used.

The relative aperture of the infrared optical system is relatively large because the target detected by the infrared system is generally far away, the action distance is large, and the target thermal radiation is weak when it reaches the infrared system, so the optical system is required to receive the radiation energy with a large aperture, and to make the detection With higher irradiance on the side elements, the relative aperture of the optical system should also be larger.

The number of components of an infrared optical system should be as small as possible, and its thickness should also be as small as possible. This feature is to avoid losses due to absorption and reflection of infrared radiation by optical elements. Although increasing the number of lenses can improve the image quality, it is rarely used in infrared optical systems.

The receiving element of the infrared optical system is an infrared detector. An infrared detector is a radiant energy converter that converts invisible infrared radiant energy into other forms of energy, typically electrical signals.
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2. Design of infrared lens

In infrared optical systems, aspherical surfaces are used more often. At present, most of the aspheric surfaces are rotationally symmetric quadratic conic surfaces from the perspective of processing and inspection technology. There are also other aspheric surfaces, such as the correction plate shape designed to correct the aberration produced by the spherical mirror in the catadioptric system. For axisymmetric aspheric surfaces, it does not increase the number of aberrations but increases the variables, which is very beneficial to the design.

The use of aspherical surfaces can design a large relative aperture to expand the field of view of the optical system and can make the thickness of the optical system thinner, saving expensive infrared-transmitting materials, thereby reducing the cost of infrared devices.

For a sphere, the shape of the surface is completely determined by a parameter y, so multiple tasks cannot be done at the same time. If an aspheric surface is used, there are more variables. Next, we use the optical path to illustrate the case of a single aspheric surface correcting spherical aberration.
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The infrared lens produced by Xiangshun Optics is an optical component used to focus or disperse light. An infrared lens may contain one or more elements, and its applications range from microscopy to laser processing. In addition, infrared lenses are also components used in many industries, such as life sciences, imaging, industrial, and defense. When light passes through a lens, its light output will be affected by the lens profile or the lens substrate. A plano-convex or bi-convex lens focuses light into a single point, while a plano-concave (PCV) or double-concave (DCV) lens scatters the light that passes through the lens. Achromatic lenses are suitable for applications requiring color correction, while aspheric lenses can be used to correct spherical aberration.

Infrared thermal imaging technology is a high-tech integration of optical, mechanical, electrical, and other advanced technologies. Through photoelectric conversion, electrical signal processing, and other means, the temperature distribution image of the target object is converted into a video image.
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For more than half a century, infrared thermal imaging technology has become more and more demanding in military applications such as reconnaissance, aiming, shooting command, and guidance, and has been incorporated into national defense development strategies by many countries.

In addition, with the continuous development of infrared detector technology, especially the emergence of low-cost, uncooled detectors, the application of infrared thermal imaging technology in civil markets such as security, fire protection, and automobiles continues to expand.
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The reason why it is used in a series of thermal imaging technologies such as infrared temperature measurement is mainly that this type of material has very outstanding optical properties of achromatic and thermalization, which are shown in the following: Transmittance performance, and has good photothermal stability characteristics.

Choose Xiangshun Optical Lens, specializing in the production of LED optical lenses, reflectors, and lamp brackets. The company has an experienced optical design and mold manufacturing research and development team, with professional automation equipment. Specializing in the production of products that meet the various conditions and requirements of customers on LED lighting products, and provide customers with high-quality services efficiently and quickly.


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