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Influence of aberration on imaging quality of optical lens (192 visualizações)
Influence of aberration on imaging quality of optical lens	Postado em 08/03/2019 12:48 por by56014904
The price difference between different optical camera lenses is large, and the imaging quality of the customized plano/spherical/aspherical/cylindrical BaF2 optics is also different. Even with the same type of optical lens, the quality of the acquired image changes due to the relationship between the fineness of the processing, the structure of the lens, and the material. When we choose the lens of the optical camera of the network port, we must first consider the aberration. The aberration is an important factor affecting the image quality. The common optical lens aberrations are as follows: A monochromatic conical beam emitted from an object point on the main axis to the optical system, after being refracted by the optical series, if the rays of different aperture angles of the original beam cannot be placed at the same position on the main axis, the ideal image on the main axis At the plane, a diffuse spot (commonly known as a blur circle) is formed, and the imaging error of the optical system is called a spherical aberration. An object point emits a monochromatic cone-shaped beam outside the main axis toward the optical system. After being refracted by the optical system, the beam does not form a clear point in the ideal plane, but forms a bright and long resemblance to a comet. Tail flare. The error caused by the imaging of such an optical system is called coma. An oblique monochromatic conical beam emitted from an off-axis object located outside the main axis to the optical system, after being refracted by the efficient optical grade special shape sapphire optics, cannot form a clear image point, but can only form a diffuse spot. The imaging error of the optical system is called astigmatism. a clear image formed by a plane object perpendicular to the main axis through the optical system, if not in a plane perpendicular to the image plane of the main axis, and on a curved surface symmetrical with respect to the main axis, that is, the ideal image plane is a curved surface, then the optical The imaging error of the system is called field curvature. When the image is adjusted to the center of the screen, the image around the screen is blurred. When the image is blurred until the image around the screen is clear, the image at the center of the screen begins to blur. Distortion is the error that the optical system becomes a curve after imaging a straight line outside the main axis of the subject. In theory, the distortion error only affects the geometry of the image and has no effect on the sharpness. This is essentially different from the ones mentioned above. After the high precision custom optical prism refracts a white light emitted by a white object, the light of each color cannot be concentrated at a point, thereby forming a color image spot, which is called color difference. This phenomenon is mainly because the refractive index of the same optical glass is different for different wavelengths of light, the refractive index for short-wavelength light is larger, and the refractive index for long-wavelength light is smaller. After the optical system refracts a white light emitted by a white object, the light of each color cannot be concentrated at a point, thereby forming a color image spot, which is called color difference. This phenomenon is mainly because the refractive index of the same optical glass is different for different wavelengths of light, the refractive index for short-wavelength light is larger, and the refractive index for long-wavelength light is smaller. zengbin /
Influence of aberration on imaging quality of optical lens (192 previews)

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