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Category Cars
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Created 2019-03-15
Owner xzbbvfvbh
Title Performance analysis of optical lenses
Description If you compare an optical lens to a human eye, [optical lens] is like an eyeball. It is directly related to the distance, range, and effect of the object. There are many kinds of optical lenses, which can be divided into short focal length, medium focal length, long focal length and zoom lens. They can be divided into wide-angle, standard and low price YLF laser crystal according to the size of the field of view. Can also be divided into fixed aperture fixed focus lens, manual aperture fixed focus lens, automatic aperture fixed focus lens, manual zoom lens, auto iris power zoom lens, electric three variable lens (aperture, focal length, focus can be all three) Types of. Lens imaging is more or less distorted. Larger distortions can cause significant problems for the vision system. In imaging design, detailed consideration should be given to this, including the use of a lens with a small distortion, and an effective field of view with only a small field of view. Another characteristic of an optical lens is its spectral characteristics, which are mainly affected by the interference characteristics of the lens coating and the absorption characteristics of the material. It is required that the light of the ideal high resolution of the optical lens should be matched with the illumination wavelength, the wavelength accepted by the custom high purity KTP nonlinear crystal, and the light transmittance of the optical lens to the wavelength should be as high as possible. Some special effects can be achieved by selecting appropriate filters in the imaging system. In addition, the design of the imaging optical path also needs to pay attention to the influence of various stray light. In recent years, the use of image measurement of item size has become a trend in the industry. Advances in equipment such as cameras, imaging software, and lighting components have made the accuracy of image-measuring items comparable or better than manual or laser measurements. Integrating the application of optical system engineering, we can find out the quality of the optical product determines the quality of the system, and the telecentric lens can perform various forms of optical measurement. Software engineering requires images with high resolution, high contrast and low geometric distortion to determine accurate measurement data. In addition to the requirements of the optical device itself, the choice of viewing angle is also of considerable importance. Measuring objects under inappropriate observation points can cause distortion of the image captured by the object. In addition to the interference that can occur during image processing, system designers also consider several limitations of optical equipment that can affect the accuracy of optical measurements: 1. Abnormal enlargement due to the placement of objects 2. Image deformation 3. Error caused by angle of view selection 4. Low image resolution 5. Uncertainty of boundary caused by inappropriate light source interference Telecentric lenses can effectively reduce or even eliminate the above problems, so telecentric custom BBO nonlinear crystal have become a decisive factor in precision optical measurement systems.
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