What kind of lens is used to observe onion cells under a microscope?
If you want to see the largest cells in the field of view, you can choose a lens combination of 15× eyepieces and 25× objective lenses; if you want to increase the number of cells observed in the field of view, you should choose a lens combination of 5× and 10× lenses. Different lens combinations would produce different magnifying factors, which would affect the observation effect. Read more exciting novels for free
What is used to clean the lens membrane in the microscope?
Do not use alcohol to wipe the microscope lens membrane, because alcohol will corrode the lens membrane. It is recommended to use professional paper and professional cleaning agents to clean the lens film. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Microscope lens modification photography
There were many ways to modify a microscope lens for photography. For example, a microscope lens could be modified into a camera lens for shooting, but this modification needed further improvement. There were also people who used the Hikvision camera and microscope lens to modify the electron microscope, but they might encounter some problems during the modification process. For example, the image was unclear, which might be a problem with the camera. When modifying, they had to consider the compatibility of the lens and the equipment. For example, when combining the microscope lens with the Hikvision network camera, they had to solve problems such as sensors, equipment errors, video storage, and so on. It may require the assistance of software such as the computer video recording software, the IVS- 4200. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Microscope objective lens parameters
The parameters of the microscope objective lens mainly included the following aspects: 1. ** Magnification **: It can be divided into low-power objectives (such as 2x, 4x/5x, and 10x), medium-power objectives (such as 20x, 40x), and high-power objectives (such as 60x/63x, 100x). Different magnifying lenses used different media. High power lenses (60x and 100x) often used oil to obtain high resolution, while lenses with lower magnifying powers used air as the medium. 2. ** Observation method **: There are many types of microscope objectives. The common observation methods marked on the lens shell are: FF (bright-field), TF (dark-field), PL (phase contrast), Po (polar light), DIC (differential interference), FF (fluorescence observation, such as blue, green, purple, etc.), UVFO (ultraviolet-fluorescence observation), etc. 3. ** Chromatic Deviation correction ability **: - Achromatic objective lens: It can only correct the color difference of red and blue light. - Semiapochromatic objective (TL): Able to correct the color difference of red, green, and blue light. - Apoachromatic objective lens (Apo): It can correct the color difference of red, green and blue light twice, and can correct the spherical aberrations of red and blue light at the same time. 4. ** Flat-field correction function **: Choose an objective lens with flat-field correction function (marked with Plan) for better imaging effect. For example, a flat-field achromatic objective (Ach) could be used to view transparent sections; a semi-apochromatic objective (TL) could be used to view fluorescence, which had a long working distance and could be used to observe glass slips and petri dishes; a full-apochromatic objective (Apo) could be used for better imaging effects. However, Apo objectives did not have a long working distance and were only suitable for viewing glass slips, not for viewing thick samples such as petri dishes or culture bottles. 5. ** Numeric Aperture (NAC value)**: This is the main parameters of the objective lens and the condensing device. It is directly proportional to the resolution of the microscope, directly proportional to the magnifying power, and inverse proportional to the depth of field. UA = n * sin alpha. Under the same amplification, the higher the UA, the better. In the case where the working distance is satisfied, the objective lens with a high UA value should be selected. The numerical aperture of the dry objective lens was 0.05 - 0.95, and the numerical aperture of the oil-immersed objective lens was 1.25. 6. ** Working Distance (WD)**: - Ordinary working distance objective lens: The working distance is small, and the slices can be observed, but the petri dish cannot be observed. - [Long working distance objective lens: Used for inverted microscope. It can be used for microscopic examination of tissues, suspension, and other materials.] 7. ** Glass slide thickness **: After the optical type of the objective lens (infinity/0)(210/0), the number behind the slash represents the applicable glass slide thickness. For example,(infinity/0.17)(210/0.17), the applicable glass slide thickness is 0.17 mm. The objective lens with a higher NAC value was more sensitive to the thickness of the cover glass. Some objective lenses with high NAC values and those with long working distances had an adjustment ring for the thickness of the cover glass, which could be used for observation in petri dishes. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
First-ever microscope lens
The Oppo Find X3 series launched a cell phone with a microscope lens. The microscope lens had a 60x magnifying power, and the rear was equipped with a 1 billion color dual main camera (composed of a 50-million-pel imx766 free-form lens, a 50-million-pel imx766 OIS optical image stabilization lens, a 13-million-pel telephoto lens with a maximum 20x digital zoom, and a microscope with a 60x magnifying power). In addition, the Realme GT2 Pro also launched the microscope 2.0 lens, which increased the object distance by nearly two times. It also supported the skin texture and skin color detection function, and upgraded the depth of field by four times. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Microscope single-lens reflex interface
The reference mentioned that some microscopes were equipped with a single-lens reflex mount. For example, the Phoenix XSP - 36 biological microscope had a single-lens reflex mount, the Phoenix RH50 - 3A43L-PL biological microscope had a single-lens reflex mount, and the Saga Binocular Professional Microscope 1600X could be connected to a single-lens reflex mount (similar to the function of a single-lens reflex mount). However, there was no detailed explanation of the single-lens reflex mount. I'm sorry, but I don't know how to answer further based on the information I found. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to adjust the position of the microscope lens
For a common microscope, the steps to adjust the lens position (focusing) were as follows: First, place the sample on the stage and fix it, then turn the coarse focusing wheel to move the distance between the objective lens and the sample. At first, the objective lens was quickly moved down to the lowest position, and then slowly raised by turning the coarse focus wheel until a blurry but visible image appeared in the field of view, indicating that the correct focus point was approaching. After that, the fine focus wheel was rotated slightly to further improve the image clarity, and the fine adjustment was made until the desired clarity was achieved. If you need a higher magnification, choose the appropriate objective lens and repeat the above steps to obtain a better focusing effect. During use, you should also ensure that the lighting is appropriate according to the actual situation, such as adjusting the brightness controller. Some models may need to turn on or turn off additional light sources. In addition, before the operation, you need to turn the changer so that the low-power lens is aimed at the light hole, and the larger aperture is aimed at the light hole. One eye is focused on the eyepieces, and the other eye is open. Turn the mirror so that the light is reflected into the lens barrel through the light hole. After seeing the bright circular field of view, you can adjust the position of the lens. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to adjust the microscope lens and focal length
The following is the general method to adjust the microscope lens and focal length: 1. ** Preparing Work ** - He placed the microscope in a suitable position. - He turned the shifter so that the low power scope was aimed at the light hole. - He aimed the larger aperture at the light hole. With one eye looking into the eyepieces and the other open, turn the mirror so that the light is reflected into the lens barrel through the light hole until a bright circular field of view can be seen through the eyepieces. 2. ** Placing slide specimen ** - Place the slide specimen on the stage and press it with a pressing plate. The specimen should be facing the center of the light hole. 3. ** Coarsely adjust focal length ** - Turn the coarse focal screw and slowly lower the objective until the objective is close to the slide specimen (do not use too much force at this time). 4. ** Fine focus adjustment ** - You can use the fine focus spiral to adjust the focal length. When you rotate the fine focus spiral, the lens barrel will rise and fall slightly to obtain a clearer image. In addition, some microscopes had an auto-adjustment function. The auto-focus system inside could automatically detect the distance of the object and then automatically adjust the focal length of the microscope so that the object's magnification and field of view were in the best state. Some microscopes could also adjust the power or focal length through the buttons on the top or by rotating the focusing cylinder. Some microscopes also supported adjusting the focal length by adjusting the coarse/fine focus spiral button. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to adjust the brightness of the visual microscope lens
The adjustment of the brightness of the field of view under the visual microscope lens was mainly related to the mirror and the shutter. The aperture and the mirror were used together to ensure the best light required. The adjustment steps were as follows: Move the revolver with your thumb and middle finger (do not move the objective lens with your hand), so that the low-power lens was aimed at the light hole of the mirror table (when you hear the knocking sound, it means that the optical axis of the objective lens has been aligned with the center of the tube). Open the aperture, raise the light collector, and turn the mirror to the light source. Observe with the left eye on the eyepieces (open the right eye). At the same time, adjust the direction of the mirror until the light in the field of vision is evenly bright. The size of the aperture could also be changed by adjusting the shutter. When the field of vision was bright, a large aperture was used, and when the field of vision was dark, a small aperture was used. As for the mirror, a concave mirror was used when it was bright, and a flat mirror was used when it was dark. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to increase the depth of field of the microscope lens
To increase the depth of field of the microscope lens, you can consider the following methods: 1. ** In terms of numerical aperture ** - The numerical aperture of the objective lens (N.A.) It affected the depth of field. In general, a smaller numerical aperture might increase the depth of field. When choosing an objective lens, the relationship between numerical aperture and depth of field could be weighed according to specific needs. However, this also needed to take into account the impact that the reduction in numerical aperture might have on other performance such as resolution. 2. ** Magnification ** - The total magnification (M) is related to the depth of field. A lower magnification often resulted in a greater depth of field. When observing, if you don't need high magnification to see the microscopic details, you can reduce the magnification to increase the depth of field. 3. ** Medium Refractive Index ** - The refraction index (n) of the medium between the objective lens and the specimen is also one of the influencing factors of the depth of field. For example, in some cases, when the medium is air, n = 1.0. If other suitable media are used to change the index of refraction, it may affect the depth of field, but this change has to take into account various factors such as the adaptability of the sample and the microscope. 4. ** Using special technology or equipment ** - For example, the Hikvision 3D ultra-depth of field digital microscope achieved a higher 3D synthetic depth of field through the innovative research and development of the light path system, combined with the precise motion control system and advanced digital image processing system. This technique could break through the limitations of traditional microscopes in terms of depth of field. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Making an electronic magnifying glass with a microscope lens
The following is a method of making an electronic magnifying glass with a microscope lens: 1. [Material preparation: Find a small-caliber concave lens (suitable for microscope lenses) and a gel pen cap (plastic).] 2. "Production process: Cut off a small section of the gel pen cap and embed the concave lens into the plastic tube. Since the thickness of the plastic tube is just the same as the lens, it can be fixed on the phone lens to make a simple electronic magnifying glass. However, this kind of self-made magnifying glass had lower requirements in terms of magnifying power. The main requirement was to be able to see the target clearly. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>