How to expand the field of view of the microscope or the viewing range of the specimen

The intended purpose you describe is to make it impossible to double the size of the original objective and eyepiece without changing the magnification.

Because the size of your field of view is determined by the nature of the objective, unless your objective lens is proportionally enlarged, it is impossible for you to expand the field of view without the same magnification.

Moreover, the purpose of the microscope is to magnify the specimen, and as for the specific ** you want to see, you can manually adjust the longitudinal and horizontal stages yourself.

If you want to expand the viewing range of the specimen at the same magnification, you can only adjust the focal length, or adjust the combination of the objective lens and eyepiece according to the formula that the objective lens is long and the eyepiece is short and the magnification is smaller.

...... when the magnification of the eyepiece objective lens remains the same

By the way, the term "adjusting the focal length" is incorrect for current lenses (made of glass, resin, etc.), because as soon as the lens is born, it is what focal length it is.

If you are a little more imaginative and move the specimen closer to the objective, you may be able to see exactly 100 at a certain distance.

The brightness of the objective lens is mainly determined by the object lens, the larger the magnification of the objective, the smaller the clear hole of the objective lens, the less light enters the microscope, and therefore the darker the field of view! It should be that the magnification is smaller and brighter, so the answer should be B

You want to magnify ten times, and you want to make half of it all the same, and your field of view is the same, so it's impossible to do it under one microscope.

Light microscopy.

It can't be done, only with the help of camera.

Ordinary microscopes can't reach it, and what you said doesn't conform to the principle of optics...

Summary. 1) Reflector: installed on the mirror base, can be rotated in any direction, it has flat and concave sides, its function is to reflect the light source light to the condenser, and then illuminate the specimen through the light hole, the concave mirror has a strong concentrating effect, suitable for use when the light is weak, and the plane mirror has a weak concentrating effect, and is suitable for use when the light is strong.

2) The condenser (condenser) is located on the condenser frame under the mirror table and consists of a condenser and an aperture, and its function is to concentrate the light on the specimen to be observed.

Condenser: It is composed of one or several lenses, which plays the role of concentrating light, strengthening the illumination of the specimen, and making the light shine into the objective lens, there is an adjustment spiral next to the lens column, and the condenser can be raised and lowered by rotating it to adjust the intensity of the light brightness in the field of view.

Aperture (iridescent aperture): Underneath the condenser, it consists of a dozen metal sheets with a handle protruding from the outside of it, pushing it to adjust the size of its opening, to adjust the amount of light. To the light:

Move the rotator with your thumb and middle finger (do not move with the objective in hand) so that the low magnification lens is aligned with the clear hole of the lens stage (when you hear a knock sound when you rotate, the optical axis of the objective is aligned with the center of the tube). Open the aperture, raise the light collector, and turn the mirror towards the light source to look at the eyepiece with your left eye (right eye open) while adjusting the mirror orientation until the light in the field of view is uniform and bright.

How should I adjust the microscope to obtain a clear view when observing specimens with strong light transmission?

1) Reflector: installed on the mirror base, can be rotated in any direction, it has flat and concave sides, its function is to reflect the light source light to the condenser, and then illuminate the specimen through the light hole, the concave mirror has a strong concentrating effect, which is suitable for use when the light is weak, and the concentrating effect of the plane mirror is weak, and it is suitable for the use of jujube files when the light is strong. 2) The condenser (condenser) is located on the condenser frame under the mirror table and consists of a condenser and an aperture, and its function is to concentrate the light on the specimen to be observed.

Condenser: It is composed of one or several lenses, plays the role of gathering light, strengthens the illumination of the specimen, and makes the light shine into the objective lens, there is a stool next to the mirror column to adjust the spiral, and it can be rotated to lift the condenser to adjust the intensity of light brightness in the field of vision. Aperture (iridescent aperture):

Underneath the condenser, it consists of a dozen metal sheets, the outside of which protrudes with a handle that pushes it to adjust the size of its opening, to adjust the amount of light. Alignment: Move the rotator with your thumb and middle finger (do not hold the objective in your hand) so that the low magnification lens is aligned with the clear hole of the lens stage (when you turn to hear a knocking sound, it means that the optical axis of the objective lens is aligned with the center of the lens barrel).

Open the aperture, raise the light collector, and turn the mirror towards the light source to look at the eyepiece with your left eye (right eye open) while adjusting the mirror orientation until the light in the field of view is uniform and bright.

Hello, your problem solved.

Apply a flat mirror with a small aperture to dim.

The object we see under the microscope is an image that is upside down, left and right, so when we move the slide specimen, the specimen moves in the opposite direction to the direction of the image For example, if we move the slide specimen to the right, and the image we see in the microscope moves to the left The object image is located in the lower right of the field of view, and if we want to move it to the field of view**, we should move the slide specimen to the lower right, and the image moves to the upper left to the field of view**

Therefore, d

Select B, the number of cells decreases, and the cell image becomes larger.

After switching from a low-magnification objective to a high-magnification objective, the field of view is reduced due to the increase in magnification, and the field of view is only a part of the field of view at low magnification, and the amount of light entering the field of view is reducedThe brightness of the field of view is noticeably darker。At the same time, also because the field of view is only a part of the field of view at low magnificationThe number of cells in the visual field decreases, but the cells are magnified again, soThe cell image becomes larger

When using a microscope to observe specimens, the magnification of the microscope increases when the low-magnification objective lens is changed to a high-magnification objective, so the number of cells in the field of view decreases from large to small, and the cell volume decreases from small to large. As the magnification increases, the field of view becomes smaller, so less light passes through, so the brightness of the field of view changes from light to dark

Therefore, b

aa] microscopy can enlarge the size of the object to be observed, but not the viewing range.

b] Through astronomical telescopes, celestial bodies and their movements can be seen more clearly.

c] In the process of criminal investigation, a magnifying glass was used to observe the finger Chang Li Wen.

d] For example, the length of two locust orange objects can be measured by eating, so as to accurately compare their lengths, rather than simply looking at them. Sometimes two groups of lead are close in length and are considered to be the same length.

It is thin and transparent, so that the light can reach the eyepiece smoothly and see the object.