Nanjing Intane Optical Engineering Co., Ltd.
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| what's the achromatic lens? |
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Definition: lens by two different combinations of materials, use of achromatic lens is to focus on two different colors of light to the same point, otherwise known as amendments to chromatic aberration. Supplementary description of [1]: General achromatic lens refers to the three kinds of wavelengths (blue, green, and red) light of the chromatic aberration correcting lens group. Color difference stems from the different wavelengths of light in the glass where the dispersion and refractive index differences, which lead to different wavelengths of light have different focus. With the use of different materials, such as crown and flint glass lens convergent and divergent lens in the mix, each glass dispersion can be compensated for by another glass, allowing an integrated chromatic aberration to a minimum. 2-type achromatic lens achromatic lens is a structure in the simplest one, it is of two types: double-glued and double-separation type. Of course, achromatic lens can also be formed by a multi-piece lens, which depends on its usage. Relatively large aperture achromatic lens is usually separated type, the assembly in the frame, the overall performance is very excellent. For the separation of pairs of lenses, the two lenses in the gap actually is equivalent to the third block of lenses, mirrors than the glue, it may be better to eliminate chromatic aberration. Therefore, it can be fairly broad-band within the framework of a balanced aberration in the field of broadband imaging play a role. |
