Product Description:The condenser, also known as the condenser, is mounted below the stage. Small microscopes often do not have a condenser. When using an objective lens with a numerical aperture of 0.40 or more, a condenser must be provided. The condenser lens can not only make up for the lack of light quantity and properly change the properties of the light from the light source, but also focus the light on the inspected object to obtain the best lighting effect. There are various structures of condenser lenses, and the requirements for condenser lenses are also different according to the size of the numerical aperture of the objective lens.
Product category:
1) Abbe condenser:
It was designed by German optics master Ernst Abbe (one of the founders of Zeiss company Ernst Abbe). The Abbe condenser is composed of two lenses and has good light-gathering ability, but when the numerical aperture of the objective lens is higher than 0.60, the chromatic aberration and spherical aberration will appear. Therefore, it is mostly used on ordinary microscopes.
2) Achromatic aplanatic condenser:
This condenser is also known as "achromatic aspheric condenser" and "Ziming condenser". It consists of a series of lenses. It has a high degree of correction for chromatic spherical aberration and can obtain ideal images. It is the quality of bright field microscopy. The highest kind of condenser, its NA value reaches 1.4. Therefore, advanced research microscopes are often equipped with such condensers. It is not suitable for low magnification objectives below 4X, otherwise the illumination source cannot fill the entire field of view.
3) Swing out condenser:
When using a low magnification objective (such as 4X), due to the large field of view, the light cone formed by the light source cannot fill the entire field of view, resulting in a dark edge part of the field of view, and only the central part is illuminated. To fill the field of view with illumination, swing the upper lens of the condenser out of the light path.
4) In addition to the above types of condensers used in brightfield, there are also condensers for special purposes. Such as dark field condensers, phase contrast condensers, polarized condensers, differential interference condensers, etc. The above condensers are suitable for corresponding observation methods.
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