JP3028684B2 - Intermediate lens barrel for microscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate lens barrel for a microscope, and more particularly, to an intermediate lens barrel for a microscope in which a fixed angle type eyepiece tube can be used as an angle variable type eyepiece tube. .

[0002]

2. Description of the Related Art FIG. 8 is a sectional view showing a state in which a fixed angle type eyepiece tube is connected to a microscope main body. Eyepiece tube 20
Is provided with a circle 20a at the incident-side connection end portion thereof.
On the other hand, a concave portion 22 is provided at the connection end on the emission side of the microscope main body 21, a round groove 23 is provided in a part of the concave portion 22, and a screw 24 which can be screwed toward the center of the concave portion 22 is attached. Have been. Round with eyepiece tube 20 2
When 0a is inserted into the concave portion 22 of the microscope main body 21 and the screw 24 is tightened, the rounded portion 20a is pressed against the rounded groove portion 23 of the concave portion 22, and the eyepiece tube 2a is connected to the microscope main body 21. The eyepiece part of this eyepiece tube 20 is 4
Since it is tilted at an angle of 5 ° and the tilt angle cannot be adjusted, depending on the physique of the observer and the state of the sample,
I was forced to observe in an unreasonable manner and was easily tired.

In order to solve this problem, an eyepiece tube capable of adjusting the inclination angle of an eyepiece has been proposed (Japanese Patent Laid-Open No. 53-70838).

In this eyepiece tube, as shown in FIG. 9, a tilt angle adjusting mechanism for changing the tilt angle of the eyepiece lens portion 120 is accommodated in a case 101, and a circle 102 is provided on the incident side of the case 101. The case 101 is connected to the microscope main body 21 by the circle 102. The eyepiece unit 120 rotates about the shaft 105 on the case 101 side, and the inclination angle continuously changes within a range from a reference inclination position indicated by a solid line in FIG. 9 to a vertical position indicated by a two-dot chain line in FIG.

[0005]

In the conventional angle-variable eyepiece tube, the eyepiece lens unit 120 and the tilt angle adjusting mechanism in the case 101 are integrally connected, and the eyepiece lens unit 1 is connected.
When 20 rotates, eyepoint E displaces on an arc of radius r about axis 105.

In FIG. 9, a mounting surface 10 of a case 101 is shown.
Height h from 1a to the eye point E, when the distance d from the incident optical axis L ₁ to the eye point E, when h is small, large d is, when h is large d it is smaller.

Therefore, the position of the eye point E is determined by the angle of inclination of the eyepiece section 120, and the position of the eye point E and the angle of inclination of the eyepiece section 120 cannot be set independently of each other. There was a problem that it was not enough to realize an observation posture suitable for the physique and the state of the sample.

In addition, the variable-angle eyepiece tube has only a function of changing the inclination angle of the eyepiece 120, and the fixed-angle eyepiece tube 20 can be effectively used. Did not.

The present invention has been made in view of such circumstances, and an object thereof is to make it possible to use a fixed-angle type eyepiece tube as a variable-angle type eyepiece tube, and to provide an eyepiece lens. It is an object of the present invention to provide an intermediate lens barrel for a microscope in which the inclination angle of the section and the position of the eye point can be set separately.

[0010]

According to a first aspect of the present invention, there is provided an intermediate lens barrel for a microscope, comprising:
Incident side fixed with a detachable microscope body connection to the body
An eyepiece tube connection that allows the connection between the fixed part and the eyepiece tube
The emission side movable part provided with the part and the incidence side fixed part
Tilt angle for making the tilt angle of the injection side movable part variable
An adjusting mechanism, and the microscope that is incident from the incident-side fixing unit.
While guiding light from the main body to the emission-side movable section,
The optical path is changed according to the change of the tilt angle by the tilt angle adjustment mechanism.
A light path diverting member for deflecting, and the microscope main body connection portion
Has the same structure as the connection end of the eyepiece tube.
Sign.

Further, a correction lens may be provided on an optical path between the incident side fixed portion and the emission side movable portion.

[0012]

The fixed angle type eyepiece tube can be connected to the microscope body via the microscope intermediate lens tube, and the fixed angle type eyepiece tube can be used as a variable angle type eyepiece tube. Various eyepiece tubes can be attached to the emission side movable portion of the tilt angle adjusting mechanism, and the tilt angle and the eye point position of the eyepiece can be set separately and independently.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an intermediate lens barrel for a microscope according to one embodiment of the present invention, and FIG. 3 is a sectional view taken along the line III-III of FIG.

A bellows-shaped case 1 houses a tilt angle adjusting mechanism, which will be described later. One end of the case 1 is connected to the base 2 as an incident-side fixed portion of the tilt angle adjusting mechanism, and the other end of the case 1 is connected to the emission-side movable portion 10.
As the injection-side movable part 10 moves, the case 1 expands and contracts from the state shown in FIG. 1 to the state shown in FIG.

At the lower part of the base 2, a circle 2a as a microscope main body connection portion is provided integrally, and a microscope main body 21 shown in FIG. 8 is connected thereto. A central hole 2b for guiding incident light is provided in the center of the circle 2. The structure of the microscope body connection portion is the same as the structure of the connection end portion 20a of the eyepiece tube 20.

[0017] The surface of the base portion 2 the reflector 3 and a pair of bearings 4 and 5 for reflecting the optical axis L ₁ incident from the central hole 2b at a right angle are fixed. The shaft 6 is rotatably supported by the bearings 4 and 5. A shaft 7 is provided at the end of the bearing 4.
Is fixed parallel to the shaft 6, and a belt wheel 8 having a radius R is rotatably attached to the shaft 7. A disk-shaped injection-side movable section 10 is fixed to both ends of the shaft 6 via connecting pieces 9a and 9b. Further, the shaft 6 has a belt wheel 11 having a radius R.
Are fixed, and a belt wheel 12 having a radius of 2R is rotatably mounted. The side of the belt pulley 12 turning mirror 13 is fixed to vary the angle of the exit optical axis L _2. The reflection point of the deflecting mirror 13 is set on the axis of the shaft 6. Also, between the belt wheel 11 and the belt wheel 8,
Belts 14 and 15 are stretched between the belt wheel 12 and the belt wheel 8, respectively.

A concave portion 10a as an eyepiece tube connecting portion is provided on the eyepiece tube side end surface of the emission side movable portion 10, and a groove 16 is provided in a part of the concave portion 10a. A central hole 10b communicating with the concave portion 10a is provided at the center of the emission-side movable portion 10, and sends out the light reflected by the deflecting mirror 13 to the eyepiece tube 20. In addition, the injection side movable section 1
A screw 17 for fixing the eyepiece tube, which can be screwed toward the center, is attached to 0.

In order to attach the eyepiece tube 20 to the microscope intermediate tube of this embodiment, the round end 20a of the connection end of the eyepiece tube 20 is inserted into the concave portion 10a of the emission-side movable section 10, and the round end 20a Is pressed into the groove 16 of the recess 10 and the screw 17 is screwed. Thus, the eyepiece tube 20
Is fixed in the concave portion 10a of the injection-side movable portion 10.

When the eyepiece of the connected eyepiece tube 20 is inclined at an angle of 2θ as shown in FIG.
Is inclined by an angle 2θ, and the belt wheel 11 also rotates by an angle 2θ. When the belt wheel 11 rotates by the angle 2θ, the belt wheel 8 also rotates by the angle 2θ via the belt 14, and the rotation of the belt wheel 8 is transmitted to the belt wheel 12 via the belt 15, but the radius is 2
Since it is R, the belt wheel 12 rotates by the angle θ. When the belt wheel 12 rotates by the angle θ, the turning mirror 13 also rotates by the angle θ. Angle of the exit optical axis L ₂ to that effect the incident optical axis L ₁ varies continuously.

FIG. 4 shows a combination example in which the eyepiece tube 20 of FIG. 8 is connected to the microscope intermediate lens tube according to one embodiment of the present invention, in a range from the position indicated by the solid line to the position indicated by the two-dot chain line. The inclination angle of the eyepiece of the eyepiece tube 20 can be adjusted. If the eyepiece tube 20 used here cannot take an optimal observation posture due to the physique or the like of the observer, it can be replaced with another eyepiece tube. For example, eyepiece tube 2
Small inclination angle of the ocular of 0, if also short distance d from the incident optical axis L ₁ to the eye point E is other eyepiece barrel distance d is short from the incident optical axis L ₁ to the eye point E Can be replaced with In the opposite case, the incident optical axis L1
The eyepiece E may be replaced with another eyepiece having a longer distance d from the eyepoint E to the eyepoint E.

When the inclination angle of the eyepiece lens portion of the eyepiece tube 20 is small and the height from the mounting surface 1a of the case 1 to the eye point E is increased, another contact point having a higher position of the eye point E is required. It can be replaced with a spectacle tube. In the opposite case, it may be replaced with another eyepiece tube having a lower eye point E position.

FIG. 5 shows an example in which the position of the eye point E is lower than that of the example shown in FIG. In this combination example, compared to the combination example shown in FIG. 4, the distance d from any incident optical axis L ₁ to the eye point E when the tilt angle of the ocular eyepiece barrel 30 is small short and the ocular Is small, the height h from the mounting surface 2c of the base 2 to the eye point E is small.

FIG. 6 shows an example in which the position of the eye point E is lower than that of the example shown in FIG. 5 and the eyepiece tube 40 is inclined at an angle of 30 °. According to this combination example, the inclination angle of the eyepiece lens unit 40 can be further reduced.

As described above, the structure of the connecting portion of the microscope main body of the intermediate barrel for the microscope shown in FIG. 1 is the same as the structure of the connecting end of the eyepiece tubes 20, 30, and 40, and
Has the same structure as the connection end of the microscope main body 21, so that the fixed-angle eyepiece barrels 20, 30, and 40 can be directly connected to the microscope main body 21 as in the related art, and the microscope intermediate mirror It can also be connected to the microscope body 21 via a tube, and the fixed-angle type eyepiece tubes 20, 30, 40
Can also be used as a variable-angle eyepiece tube,
The fixed angle type eyepiece tubes 20, 30, and 40 can be effectively used.

In this embodiment, the tilt angle adjusting mechanism is constituted as an intermediate lens barrel independent of the eyepiece tube, and can be combined with any of the eyepiece tubes 20, 30, and 40. The inclination angle of the eyepiece and the position of the eye point E can be arbitrarily selected according to the physique of the observer and the state of the sample, and the observation posture can be fully optimized.

Although the binocular stereo microscope has two right and left optical systems, is an erect image, and has a complicated optical system, the configuration of the tilt angle adjusting mechanism is often limited. According to the microscope lens barrel described above, the incident side optical axis L
Since the angle of the exit-side optical axis L ₂ to ₁ can be continuously varied, without being restricted as described above, may work to simplify the structure of the overall eyepiece barrel.

FIG. 7 is a sectional view of an intermediate lens barrel for a microscope according to another embodiment of the present invention. The same reference numerals are given to portions common to the microscope intermediate lens barrel of the embodiment of FIG. 1 and the description is omitted.

In this embodiment, the correction lens 1 is provided in the round hole 2a and the center holes 2b and 10b of the emission side movable portion 10, respectively.
8 and 19 were inserted, and the optical path length was increased by using the intermediate lens barrel for the microscope, so that the peripheral light amount was prevented from lowering. The correction lenses 18 and 19 are of an afocal type, and are used when the distance between the main body and the eyepiece tube is an infinite distance type. If the correction lenses 18 and 19 are both convex lenses to form an afocal system, an inverted image is formed once between the correction lenses 18 and 19, so that the eyepiece tube does not require an erecting optical system. Further, when the correcting lens 18 is a concave lens and the correcting lens 19 is a convex lens, the present invention can be used for a microscope in which the body and the eyepiece tube are not parallel.

[0030]

As described above, according to the intermediate barrel for a microscope of the present invention, the fixed-angle type eyepiece barrel can be connected to the microscope body via the intermediate barrel for the microscope. The eyepiece tube can be used as a variable-angle eyepiece tube, so that the fixed-angle eyepiece tube can be used effectively, and the inclination angle and the eye point position of the eyepiece part can be adjusted. Since they can be set separately and independently, an optimal observation posture can be realized according to the physique of the observer and the state of the sample, and fatigue of the observer can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an intermediate barrel for a microscope according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the microscope intermediate barrel in FIG. 1 has been moved by a predetermined angle.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a side view showing a state where a fixed-angle eyepiece tube is connected to the microscope intermediate lens tube of FIG. 1;

FIG. 5 is a side view showing a state where another fixed-angle eyepiece tube is connected to the microscope intermediate lens tube of FIG. 1;

FIG. 6 is a side view showing a state in which another fixed-angle eyepiece tube is connected to the microscope intermediate lens tube of FIG. 1;

FIG. 7 is a sectional view of an intermediate lens barrel for a microscope according to another embodiment of the present invention.

FIG. 8 is a sectional view showing a state in which a fixed-angle eyepiece tube is connected to a microscope main body.

FIG. 9 is a side view showing a conventional angle-variable eyepiece tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Base part 2a Rounded 3 Reflector 4,5 Bearing 6,7 axis 10 Injection side movable part 8,11,12 Belt wheel 10a Concave 13 Deflection mirror 14,15 Belt 16 Rounded groove 17 Screw

Claims (2)

(57) [Claims] 1. A microscope body connection detachable from a microscope body.
Provided with an incident side fixed part provided with a part, and an eyepiece tube connection part with a detachable connection end part of the eyepiece tube
And the inclined angle of the emission side movable part with respect to the incident side fixed part.
A tilt angle adjustment mechanism that makes the light variable, and light from the microscope main body that enters from the entrance-side fixing portion.
To the injection-side movable section and adjust the tilt angle.
An optical path that changes the optical path according to the change of the tilt angle by the mechanism
A turning member, wherein the microscope main body connection portion is the same as a connection end portion of the eyepiece tube.
An intermediate lens barrel for a microscope , which has the same structure . 2. The intermediate barrel for a microscope according to claim 1, wherein a correction lens is provided on an optical path between the incident side fixed portion and the emission side movable portion.