JP3016583B2 - Replacement unit for coaxial incident light in the objective for magnification observation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to various fields such as medical, academic, and industrial fields, for example, for observing objects such as human skin, microscopic organisms, and integrated circuits. The present invention relates to a magnifying observation object for magnifying and observing a position as it is without any processing, and more particularly to a coaxial incident light exchange unit in such an object.

[Conventional technology]

An example of the objective for the magnifying observation as described above is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 1-308527. This objective tool guides light from an external light emitting source into the objective tool body with an optical fiber cable, and forms a light source by arranging the tips of the optical fibers in the optical fiber cable in an annular shape in the objective tool body. Then, irradiation light from the light source is applied to the object to be observed via the light guide cap. This allows
Strong irradiation light can be concentrated on the observation target site of the object to be observed, and various irradiation lights such as horizontal light (side light), incident light, and transmitted light can be obtained in an appropriate combination.

By the way, depending on the type of the object to be observed, it may be more effective to perform observation using incident light parallel to the optical axis of the optical system, that is, coaxial incident light, but with the above-described technique, only non-coaxial incident light can be obtained.

[Problems to be solved by the invention]

Therefore, an object of the present invention is to provide a coaxial incident light exchange unit that can be exchangeably attached to and detached from the above-mentioned objective having a light source of an annular arrangement.

[Means for solving the problem]

Such an object is an exchange unit for coaxial incident light in an objective for magnifying observation including a light source arranged in a ring shape in the main body of the object, and a base end corresponding to the ring-shaped light source. While being arranged in an annular shape, the secondary light source formed by a plurality of optical fibers whose ends are focused, and the irradiation light from this secondary light source is orthogonal to the optical axis of the optical system for enlarging the object to be observed A reflecting mirror that guides in the direction of the optical system, and a half mirror that is on the optical axis of the optical system and guides the irradiation light from the reflecting mirror to the object to be observed along the optical axis of the optical system. This is achieved by a coaxial incident light exchange unit that is made free.

[Action]

This coaxial incident light exchange unit collects irradiation light from an annular light source on the object main body side into a single point using a plurality of optical fibers to form a secondary light source, and divides the irradiation light from the secondary light source into a reflector and a half light. A mirror is used to irradiate the object to be observed with coaxial incident light. If this is replaced with a light guide cap and attached to the main body of the objective, coaxial incident light can be easily obtained.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described.

The coaxial incident light exchange unit 1 is used for an objective 2 as shown in FIG. That is, the objective tool 2
Is composed of a cylindrical objective main body 3, an exchangeable optical system unit 4 detachable from the objective main body 3, and a replacement objective tip 5 also detachable from the objective main body 3. As the replacement objective tip 5, a light guide cap according to the above-described prior art is used in addition to the coaxial incident light replacement unit 1 according to the present invention.

In the object main body 3, a light source to be arranged in an annular shape is built in. In this example, light from an external light source is guided into the object main body 3 by an optical fiber cable 10, and the light in the optical fiber cable Connect the tip of each optical fiber 10f to the object 3
The light sources 11 are formed in an annular arrangement inside (FIG. 4). However, the present invention is not limited to this, and a plurality of light emitting sources may be directly arranged in an annular shape in the object main body 3.

The replacement optical system unit 4 incorporates a built-in optical system 4d for obtaining an enlarged image of the object to be observed, and a light-shielding eave 4c for a diaphragm is attached to a tip of the optical system unit 4d. The objective screw main body 3 can be screwed with the screw screw 4s provided.

As shown in FIGS. 1 and 2, the exchange unit 1 for coaxial incident light is provided with a secondary light source 13, a reflecting mirror 14, and a half mirror 15 in a cylindrical housing 12. Can be screwed to the object main body 3 with a screwing screw 12s formed at the base end of the object.

The secondary light source 13 is formed of a plurality of optical fibers 13f, 13f,. The light source lens 1 for collimating the irradiation light emitted from the optical fiber 13f is provided at the tip of the optical fibers 13f, 13f,.
6 are provided.

The reflecting mirror 14 is a plane mirror provided at an angle of 45 ° with respect to the optical axis of the light source lens 16 in front of the light source lens 16. The reflecting mirror 14 converts the irradiation light L from the secondary light source 13 into a direction of 90 ° to form an optical system 4d. This is for guiding in a direction orthogonal to the optical axis LA.

The half mirror 15 is a plane mirror having a structure in which light impinging on the half mirror is partially transmitted and partially reflected, and is provided on the optical axis LA of the optical system 4d at an angle of 45 ° with respect to the optical axis LA. This is for guiding the light L to the observation object M along the optical axis LA.

This coaxial incident light exchange unit 1 is used by being attached to the objective tool main body 3 instead of the above-described light guide cap as necessary, and is configured to emit irradiation light from the annular light source 11 on the objective tool main body 3 side. .. Has a function of irradiating the observation object M with the irradiation light from the secondary light source 13 formed by concentrating the plurality of optical fibers 13f, 13f,. Also, this coaxial incident light exchange unit 1
Also has a function of focusing the optical system 4d on the object M. If the tip of the housing 12 is brought into contact with the object M, the optical system 4d is focused on the surface of the object M. It has become.

In this example, the optical system 4d is replaced with the replacement optical system unit 4.
Aside from the coaxial incident light exchange unit 1, the half mirror 15 is arranged ahead of the objective lens, but the distance between the objective lens and the observation object M depends on the type of the objective lens of the optical system 4d. Optical system 4d
Also, the half mirror 15 is provided behind the objective lens integrally with the coaxial incident light exchange unit 1.

〔The invention's effect〕

The exchange unit for coaxial incident light according to the present invention is as described above, and by using it interchangeably, observation with coaxial incident light can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of the exchange unit for coaxial incident light partially cut off, FIG. 2 is a schematic cross-sectional view of the exchange unit for coaxial incident light mounted on the main body of the objective device, and FIG. And FIG. 4 is a schematic plan view of the main body of the objective as viewed from the direction of arrow IV in FIG. DESCRIPTION OF SYMBOLS 1 ... Exchange unit for coaxial incident light 2 ... Object tool 3 ... Object tool body 11 ... Light source 13 ... Secondary light source 14 ... Reflecting mirror 15 ... Half mirror 13f ... Optical fiber

Claims (1)

(57) [Claims] 1. A replacement unit for coaxial incident light in an objective for magnifying observation comprising a light source arranged in an annular shape in a main body of the objective, wherein a base end corresponds to the annular light source. A secondary light source formed of a plurality of optical fibers whose ends are converged while being arranged in an annular shape, and irradiating light from the secondary light source in a direction orthogonal to the optical axis of an optical system for enlarging an object to be observed. And a half mirror that is on the optical axis of the optical system and guides the irradiation light from the reflector to the object to be observed along the optical axis of the optical system. Replacement unit for coaxial incident light.