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Customized filter is a type of filter/filter formed by coating a series of film layers of different dielectric materials between glass substrates according to customer needs when standard filters do not meet usage requirements. When multiple wavelengths of mixed light pass through the filter, interference effects occur due to different refractive indices, resulting in specific wavelengths of light having very high transmittance while other wavelengths of light are reflected or absorbed. Customized filters are usually ordered in one batch, while
In the optical lens of an optical component, every point on the object plane within the effective field of view during observation forms a clear image point on the image plane of the eye. We refer to the difference between the ideal image and the actual image as image difference, abbreviated as aberration. Image differences can be divided into two categories: monochrome image differences and color differences. Monochromatic aberration can be divided into: spherical aberration: when a near axis ray passes through a spherical mirror, the ray passing through the center of the lens and the ray passing through the edge of the lens cannot be at the same point
The light we see in our daily lives is actually composite light, for example, using a prism to let sunlight pass through the prism, the light will be decomposed into seven colors by the prism, and this phenomenon is called dispersion. This dispersion phenomenon is of great value to the jewelry and diamond jewelry industry, but it is a major problem for optical lenses. If it is a glasses lens, it will straighten the lens and cause blurred vision even when worn. To handle this problem scientifically, the first step is to identify the parameters of the problem
Today let's take a look at the optical component plan and how to understand the annotations on it for your reference. The content of the optical component plan mainly includes the external dimensions, materials, technical requirements, and characteristics of the optical component. The main title bar contains the product name and code; Scale of the image; Material name, code, standard number; Design, change and other signature columns. Requirements for materials: nd value (refractive index): Light propagates at different speeds in different media. In physics
An optical prism is a transparent optical component that refracts light by polishing the surface of the prism. Prisms can split light into its original components, namely spectra, and can also be used for reflection or splitting into different polarized light. When light waves enter another medium from one medium, the speed of light changes, and the direction of light propagation also bends, resulting in varying degrees of light reflection. The refractive index of most media is related to the wavelength or color of light. When the prism surface refracts, dispersion will cause
Laser ranging principle: Laser rangefinder is an instrument that uses laser to accurately measure the distance of a target. The laser rangefinder emits a very fine laser beam towards the target during operation. The laser beam reflected by the target is received by the photoelectric element. Measure the time from transmission to reception using a timer and calculate the distance from the observer to the target. If the laser is continuously emitted, the range can reach about 40km, and this operation can be carried out during both day and night. If the laser pulse has absolute accuracy
The most widely used type of infrared filter currently is the Michelson interferometer scanning, known as Fourier transform infrared spectroscopy. Infrared spectrometer is an instrument that utilizes the absorption characteristics of the detected substance towards specific wavelengths of infrared radiation to analyze chemical composition and molecular structure. Its structure mainly includes four parts: light source, spectral system, sample cell, and detection system. Common light sources for infrared spectroscopy include laser diodes, tungsten halide lamps, and light-emitting diodes. Spectral System
In optical components, light energy is lost due to reflection on the surface of the component. In order to reduce the reflection loss on the surface of the component, a transparent dielectric film is usually coated on the surface of the optical component. This type of film is called an anti reflective film. From the perspective of energy conservation, it enhances the transmittance of optical components. Based on the Fresnel formula and the law of refraction, the transmission principle of the anti reflective film was quantitatively explained; The principle of improving the transmission rate of anti reflective films was explained using the electromagnetic transmission theory of electrodynamics. use
With the continuous increase of highways, urban roads, and parking lots, higher and higher requirements have been put forward for traffic control and safety management. Intelligent traffic management systems have become the mainstream of traffic management development, and license plate recognition technology, as the core of this system, plays a crucial role. Due to the complexity of the license plate itself, with different backgrounds, similar shapes, and unclear damaged fonts, coupled with the fact that the car is moving and mostly photographed outdoors, it has achieved high accuracy
With the vigorous development of China's national economy, environmental protection work in the overall environment has been urgently put on the agenda. China's motor vehicle exhaust emission standards are approaching those of Europe. The opaque smoke meter with high technical indicators for automobile exhaust detection is gradually replacing the filter paper smoke meter and entering the market. The opaque smoke meter is a portable intelligent instrument used to detect visible pollutants in the exhaust and smoke of compression ignition diesel engines. This instrument adopts advanced measurement technology and advanced detection components from abroad