JP2021110915A - Focal length correction tool for use of eyeglasses in microscopic observation - Google Patents

Abstract

To provide a correction tool that does not require attachment/detachment of eyeglasses during observation since a conventional microscope does not have a function to adjust the focal distance between an eyepiece and an objective lens, so those who use eyeglasses due to nearsightedness, farsightedness, presbyopia and so on have to repeatedly remove and install the eyeglasses during observation and other times, such as when recording, which is very complicated, and they have to make observation in an area of a narrow visual field diameter to avoid such a situation, which leads to oversight and is one of the causes of trouble.SOLUTION: A tubular correction tool that can add a focal length adjustment function is provided between an eyepiece 5 and a lens barrel portion 6. The correction tool has a portion 3 fixed to the lens barrel portion, a portion 2 in which the focal length is changed by rotation at a thread portion, and a portion 1 in which the eyepiece 5 is inserted upward in a screw-in type rotating portion.SELECTED DRAWING: Figure 2

Description

Originally, spectacles are those that correct the focal length so as to match the eyes of people with myopia, hyperopia, and presbyopia, and to match the eyes with normal vision.

The present invention relates to an apparatus and a method for ensuring a visual field diameter equivalent to that of a person having healthy eyesight, such as eyeglasses.

The purpose of using a microscope or the like is to magnify and observe a minute sample that cannot be observed with the naked eye.

When observing with a microscope etc. for those with healthy eyesight, securing the field of view can secure the field of view as indicated by the manufacturer and there is no big problem, but when observing with glasses etc., the focal length is out of order. Since the visual field diameter becomes extremely narrow, glasses and the like are often removed.

As the field of view becomes narrower, you may overlook what you are observing, which may cause trouble. Further, although the visual field diameter can be secured to some extent by removing the spectacles or the like, recording becomes difficult this time with the naked eye without the spectacles or the like.

Not applicable

In the case of a general upright microscope, the main structure consists of a reflector, a stage, an objective lens, a lens barrel, and an eyepiece from the bottom, and the observation sample on the stage is magnified through the objective lens and has a hint. You can see the magnified image by looking through the eyepiece. The objective lens is only mounted on the lens barrel, and there is no mechanism for adjusting the focal length between the objective lens and the eyepiece.

Therefore, the present inventor has provided a function of adjusting the focal length of the objective lens and the eyepiece by attaching a telescopic auxiliary tool between the conventional eyepiece and the lens barrel.

Means to solve problems

By adding the function of adjusting the focal lengths of the objective lens and eyepiece of the microscope, the observation field diameter of a person using a visual acuity correction device such as eyeglasses can be secured to the same range as that of a healthy person, so that the person can originally observe. It is possible to avoid oversight of the sample to be taken, and it is possible to observe the sample regardless of the difference between the observer's myopia, hyperopia, presbyopia, etc.

Since most microscopes are often shared, the auxiliary tool of the present invention is an auxiliary tool that removes the eyepiece and sandwiches it between the lens barrel and the lens barrel. Therefore, it is easy to use a microscope that is shared by those who do not use eyeglasses. It can be removed and is easy to handle.

Effect of the invention

The auxiliary tool of the present invention has a tubular form in which the focal lengths of the eyepiece and the objective lens can be expanded and contracted. A field diameter equivalent to that of a healthy person can be secured. When used by people with myopia who need eyeglasses, it may be necessary to slightly scrape the bottom of the eyepiece (the part in contact with the lens barrel). When used by people with good eyesight, the auxiliary tool can be easily removed from the lens barrel once the eyepiece is removed.

(Photo 1) It is a photograph and an illustration of an overall view in which a mold that expands and contracts by a screwing method with a telescopic auxiliary tool according to the present invention is attached between an eyepiece and a lens barrel. (Photo 2) It is a photograph and an illustration of an enlarged view in which a mold that expands and contracts by a screwing method with a telescopic auxiliary tool according to the present invention is attached between an eyepiece and a lens barrel. (Photo 3) It is a photograph and an illustration of a place where a mold that expands and contracts by a screwing method with a telescopic auxiliary tool according to the present invention is attached between an eyepiece and a lens barrel and one side is extended. (Photo 4) The auxiliary tool according to the present invention is made of rubber or the like attached to the lens barrel, and the eyepiece is pressed and held by using the elasticity and frictional force of the rubber or the like to extend the distance between the eyepiece and the lens barrel. There is a photograph and an inset of the whole view of the mold fixed to the focal length of the person. Is a cross-sectional view of (FIG. 4). (Photo 6) is a photograph and an illustration of an overall view of (Fig. 4) and (Photo 4) attached to a microscope.

Hereinafter, the present invention will be described in detail based on the embodiments of the invention shown in the figure.

FIG. 1 The focal length is changed by rotating 1 with a telescopic auxiliary tool according to the present invention, which is a type that expands and contracts by a screwing method.

FIG. 2 is an enlarged view in which the auxiliary tool is attached between the eyepiece and the lens barrel.

In Fig. 3, an auxiliary tool is attached between the eyepiece and the lens barrel, and 1 is rotated to extend one side.

FIG. 4 is an overall view of a mold made of rubber or the like attached to a lens barrel with the auxiliary tool according to the present invention, and using the elasticity of rubber or the like to press-contact and hold the eyepiece to fix it at the focal length of the user.

FIG. 5 is a cross-sectional view of FIG.

The auxiliary tool according to the present invention is made of rubber or the like attached to the lens barrel, and an auxiliary tool of a type that presses and holds the eyepiece lens and fixes it to the focal length of the user by using the elasticity of the rubber or the like is the eyepiece lens and the lens barrel. It is an enlarged view attached between.

1 The theory is that the eyepiece is inserted upward at the screw-in type rotating part.
2 Change the focal length by rotating 1 with the screw part 3 Part to be fixed to the lens barrel part 4 Microscope body 5 Eyepiece 6 Lens barrel part 7 The focal length of the objective lens and eyepiece made of rubber etc. Body of auxiliary tool for adjusting and holding 8 Eyepiece holding part 9 Lens barrel holding part

Claims (2)

When a person who has impaired visual acuity such as myopia or presbyopia and wears eyeglasses (including contact lenses) observes a sample, he / she has a healthy visual acuity by adjusting the focal length between the objective lens and the eyepiece. Correction tool to secure the same viewing diameter A removable, telescopic tubular corrector that can be manually adjusted between the lens barrel and the eyepiece.

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