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| Eyepiece Type | Huygens Eyepiece |
| Eyepiece Optical Magnification | 16X |
| Plan Eyepiece | Plan Eyepiece |
| Eyepiece Size for Eye Tube | Dia. 23.2mm |
| Eyepiece Field of View | Dia. 10mm |
| Surface Treatment | Electroplating Black |
| Material | Metal |
| Color | Black |
| Net Weight | 0.04kg (0.09lbs) |
Technical Info
| Eyepiece is also called ocular. Eyepiece is a visual optical device that is used to observe an image formed by an objective lens after magnification. Eyepiece can magnify the real image obtained by the magnification of the objective lens to form a clear and erect virtual image at the least distance of distinct vision (LDDV). For aberration, eyepiece is usually composed of several lenses that correct the residual aberrations produced during imaging by the objective lens. Usually, eyepiece has a relatively larger field of view and angular magnification. The eyepiece is provided with a diaphragm in the middle of the upper and lower lenses, or at the lower end of the lower lens, wherein micrometer, reticle, pointer and other accessories are mounted. On the eyepiece there is engraved with the following marks: eyepiece type, magnification, field of view number, and the like. For example, eyepiece is engraved with PL10X/22; PL represents plane eyepiece, or flat-field eyepiece, 10X is the magnification, 22 represents the field of view, and the glasses mark represents high eyepoint eyepiece, and C represents compensating eyepiece. Generally, the outer diameter of the eyepiece of a compound microscope is 23.2 mm, and stereo microscope can have a much larger field of view diameter because of its low magnification, so the outer diameter is mostly 30 mm (or 30.5 mm). The resolution capability of the microscope is determined by the numerical aperture of the objective lens, while the eyepiece plays only the magnification role. Therefore, for structures and details that cannot be distinguished by the objective lens, the eyepiece still cannot distinguish even if it is magnified again. |
| The Huygoens eyepiece is composed of two single-sided plano-convex lenses of the same type of glass, consisting of two convex lenses that have not been corrected by chromatic aberration; both are convex toward the objective lens, and the piece close to the eye is called eye piece, for magnification function; the other piece is called field lens, which makes the image brightness uniform. On the focal plane of the eye lens between the two lenses, there is a diaphragm, which is a parallax diaphragm, which also plays the role of the eyepiece to eliminate the stray light, and can also place the reticle or the pointer on this diaphragm. Huygens eyepiece has no correction aberration. It is only suitable for use with low and medium achromatic objectives. They are simple in structure and low in cost, which is a commonly used eyepiece for low-end microscopes. Huygens eyepieces can be used for both observation and photography. When the image formed by the objective lens is within the focus of the eye lens, it becomes a magnified virtual image, microscopic observation can be performed; when the image formed by the objective lens is outside the focus of the eye lens, it becomes magnified real image, microscopic photography can be performed. |
| Eyepiece optical magnification is the visual magnification of the virtual image after initial imaging through the eyepiece. When the human eye observes through the eyepiece, the ratio of the tangent of the angle of view of the image and the tangent of the angle of view of the human eye when viewing or observing the object directly at the reference viewing distance is usually calculated according to 250 mm/focal length of eyepiece. The standard configuration of a general microscope is a 10X eyepiece. Usually, the magnification of the eyepiece of compound microscope is 5X, 8X, 10X, 12.5X, 16X, 20X. As stereo microscope has a low total magnification, its eyepiece magnification generally does not use 5X, but can achieve 25X, 30X and other much bigger magnification. |
| The eyepiece field of view is the diameter of the field diaphragm of the eyepiece, or the diameter of the image plane of the field diaphragm imaged by the field diaphragm. The diameter of a large field of view can increase the viewing range, and see more detail in the field of view. However, if the field of view is too large, the spherical aberration and distortion around the eyepiece will increase, and the stray light around the field of view will affect the imaging effect. |
| After unpacking, carefully inspect the various random accessories and parts in the package to avoid omissions. In order to save space and ensure safety of components, some components will be placed outside the inner packaging box, so be careful of their inspection. For special packaging, it is generally after opening the box, all packaging boxes, protective foam, plastic bags should be kept for a period of time. If there is a problem during the return period, you can return or exchange the original. After the return period (usually 10-30 days, according to the manufacturer’s Instruction of Terms of Service), these packaging boxes may be disposed of if there is no problem. |
| Packing | |
| Packaging Type | Carton Packaging |
| Packaging Material | Cardboard Box |
| Inner Packing Material | Plastic Bag |
| Ancillary Packaging Materials | Sponge |
| Gross Weight | 0.20kg (0.44lbs) |
| Minimum Packaging Quantity | 1 Pair |
| Transportation Carton | Carton Packaging |
| Transportation Carton Material | Corrugated Carton |
| Transportation Carton Dimensions(1) | 15.2x15.2x15.2cm (6x6x6″) |
| Total Gross Weight of Transportation(kilogram) | 0.34 |
| Total Gross Weight of Transportation(pound) | 0.75 |
