When using a microscope, the following problems occur, please find out the cause and propose a solut

When using a microscope, we should pay attention to the following problems.

One, the left eye looks at the drawing with the right eye.

When using a microscope for the first time, you are used to opening one eye and closing the other, which is wrong, and you have to open it at the same time.

Second, when lowering the lens barrel, the eyes must be fixed on the objective lens to prevent damage to the lens.

Remember not to observe the eyepiece lowering tube.

Third, different students gather around a microscope.

Can't be lighted. Fourth, hands should not touch the lens.

This is the most common mistake beginners make.

1. When taking and placing the microscope, first take out the microscope from the lens box, you must hold the lens arm with one hand, hold the lens holder with the other hand, keep the mirror body upright, and never use one hand to tilt and carry it to prevent the eyepiece from falling. Handle with care, with the temples facing you, 5-10 cm from the edge of the table. The table is required to be balanced, the top is clean, and it is protected from direct sunlight.

2. Turn on the light source and turn on the power switch.

3. Place the slide specimens. Place the slide specimen to be examined on the stage so that the material is facing the aperture**. The slide is then clamped at both ends with a spring pressure to prevent the slide specimen from moving.

If a slide mover is used, snap the slide specimen into the slide mover, then adjust the slide mover to move the material to the position directly opposite the clear hole**.

4. When observing objects with a microscope with a low magnification objective, you should first use a low magnification objective lens to find the magnified virtual image. Because of the large observation range of the low-magnification objective, it is easier to find the object image and find the parts that need to be carefully observed.

The method is as follows: 1) Rotate the coarse collimation spiral and look from the side with your eyes to lower the lens barrel until the low-magnification objective lens is about a centimeter away from the specimen.

2) Look through the eyepiece with your left eye, open your right eye naturally, and slowly rotate the coarse collimation spiral with your hand to gradually raise the lens barrel until the magnified virtual image in the field of vision is clear. After that, the fine collimation spiral was used, and the focal length was slightly adjusted to make the object image clearest.

I hope I can help you with your doubts.

(1) Special caution must be taken when operating, and there can be no drastic movements. It is not allowed to disassemble the optical system by yourself.

2) It is strictly forbidden to directly touch the glass part of the microscope lens and the grinding surface of the specimen with your fingers. If dust falls on the lens, it will affect the clarity and resolution of the microscope. At this time, you should blow off the dust and sand with an ear wash ball first, and then gently wipe it with lens paper or a brush to avoid directly scratching the lens glass and affecting the use effect.

3) Never plug the bulb (6 8V) of the microscope directly into the 220V power socket, it should be plugged into the transformer, otherwise the bulb will be burned out immediately. The power should be turned off in time after the observation is over.

4) When rotating the coarse adjustment (or fine-tuning) handwheel, the action should be slow, and the operation should be stopped immediately when encountering some kind of obstacle, and the instructor should be reported to find the reason, and the force should not be forcefully rotated, otherwise the machine will be damaged.

Steps for using an optical microscope:

1. Take the lens and place it.

Hold the temple arm with your right hand and hold the lens base with your left hand

Place the microscope on the bench and mount the eyepiece and objective lens slightly to the left

2. To the light. Turn the converter so that the low-magnification objective is aligned with the clear aperture Note that the front end of the objective should be kept 2 cm away from the stage

Aim a large aperture at the aperture with your left eye inside the eyepiece and your right eye open for later viewing and drawing Turn the mirror to see a bright field of vision

3. Observation. Mounting: Put the slide to be observed on the stage, press it with a clamp, and the specimen should be facing the light hole

Focusing: Rotate the coarse collimation spiral to make the lens barrel slowly descend, and look at the objective lens to avoid the objective lens touching the slide specimen until the objective lens is close to the glass slide At this time, the left eye looks into the eyepiece, and at the same time rotates the coarse collimation focus in the opposite direction, so that the lens barrel slowly rises until the object image is found, and the object image is not clear, and then adjust the fine collimation spiral to make the object image clearer

At the end of the experiment, tidy up the microscope, rotate the converter so that the objective lens is biased to both sides, lower the lens barrel to the lowest point, and erect the reflector

Therefore, b

Shockproof, dustproof.

Don't be brutal.

Wash the microscope with 95% alcohol at intervals.

Precautions for use of the microscope and its use.

When using a microscope, it is easy to make the mistake that the focal length of the two eyepieces is not adjusted properly! As follows:

1 Adjust the mirror so that the plane is facing the microscope or turn off the fluorescent lamp on the laboratory table2 Adjust the aperture 3 Do not let the mirror of the microscope face out of the window, move the position of the microscope4Adjust the coarse and fine collimation spirals5 Move the loading or there is a problem with the mounting.

Adjust the brightness of the microscope field of view: when the light is strong, use a small aperture and a plane mirror to adjust; When the light is weak, adjust it with a wide aperture and a concave mirror Therefore, if the light is too weak, use a large aperture and a concave mirror to adjust it, which will brighten the field of vision

So the answer is: large aperture; Concave mirrors