Effect Of Aberration On Imaging Quality Of Optical Accessories

By Author: wholesale large size optical grade sapphire optics
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The price difference between different industrial camera lenses is large, and the imaging quality of the lens is also different. Even with the same type of [url=https://www.honoroptics.com/purchase-high-purity-optical-grade-sapphire-optics/]wholesale large size optical grade sapphire optics[/url], 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 industrial camera lens of the network port, the first thing to consider is the aberration. The aberration is an important factor affecting the image quality. The common optical component aberrations are as follows:
Spherical difference
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 is formed, and the imaging error of this optical system is called spherical aberration.
Hypothesis
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... 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.
Astigmatism
An oblique monochromatic conical beam emitted from an off-axis object located outside the main axis to the [url=https://www.honoroptics.com/high-efficiency-thin-film-multilayer-mgf2-optics/]wholesale MgF2 optics[/url], after being refracted by the optical series, cannot form a clear image point, but can only form a diffuse spot. The imaging error of the optical system is called astigmatism.
Field music
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
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.
Color difference
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 [url=https://www.honoroptics.com/low-cost-wholesale-optical-waveplate/]zero order/multiple order/achromatic optical waveplate[/url] 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.