CN108020914B

CN108020914B - Operating microscope

Info

Publication number: CN108020914B
Application number: CN201610957489.0A
Authority: CN
Inventors: 李剑月; 周晓峰; 杨晓光; 陈小甜
Original assignee: Suzhou Sumai Medical Technology Co ltd
Current assignee: Suzhou Sumai Medical Technology Co ltd
Priority date: 2016-11-03
Filing date: 2016-11-03
Publication date: 2021-06-15
Anticipated expiration: 2036-11-03
Also published as: CN108020914A

Abstract

The invention relates to an operating microscope, which comprises a main lens body and a binocular lens barrel seat, wherein the main lens body can swing to two sides of the main lens body along a binocular visual axis in a plane vertical to the binocular visual axis of the binocular lens barrel seat; the binocular tube holder is internally provided with a small objective lens group and an eyepiece lens group, the operating microscope further comprises a deflection imaging system, the deflection imaging system comprises a first imaging lens group, a steering prism and a second imaging lens group, the first imaging lens group and the second imaging lens group are fixedly arranged relatively, the steering lens group only performs primary steering on intermediate imaging of the first imaging lens group, and imaging light is observed along the large objective lens group, the zoom group, the first imaging lens group, the steering prism, the second imaging lens group, the small objective lens group and the eyepiece lens group. The invention reduces the divergence of light rays by carrying out primary intermediate imaging in the deflection image-rotating system; the lens groups on the two sides do not need to move relatively, so that the beam divergence is reduced, and the advantage of no shielding of a visual field is kept.

Description

Operating microscope

Technical Field

The invention relates to the field of medical optical instruments, in particular to an operating microscope.

Background

In recent years, an operation microscope with a deflection observation function has appeared, and see U.S. patent publication No. US6982827, which discloses an operation microscope with a deflection device that allows a main mirror body to swing in a plane perpendicular to a binocular visual axis to change an observation direction while keeping a head position still during observation by a doctor. However, the operating microscope has no lens group, the imaging light beam has large divergence, and the visual field is blocked.

See chinese patent publication No. CN104730698A, which discloses an operating microscope employing: the deflection image rotating system is composed of a first image rotating lens group for expanding imaging light, an image rotating prism for converting the angle of the imaging light and a second image rotating lens group for converging the imaging light, wherein: the first image rotating lens group and the turning prism are fixed in the main lens body, the second image rotating lens group is fixed in the binocular tube, the first image rotating lens group and the second image rotating lens group are respectively arranged in the main lens body and the binocular tube, the two lens groups need to rotate relatively when in use, the requirement on the precision of parts is high, and the assembly and the calibration are complex.

Disclosure of Invention

The invention aims to provide an operating microscope.

In order to achieve the purpose, the invention adopts the technical scheme that:

an operating microscope comprises a main lens body and a binocular tube connected with the main lens body, wherein the main lens body can swing to two sides of the binocular tube by taking a binocular visual axis as a swing axis in a plane vertical to the binocular visual axis of the binocular tube, and a large objective group and a zoom group are arranged in the main lens body; the binocular tube is internally provided with a small objective lens group and an eyepiece lens group, the operating microscope further comprises a deflection image rotating system, the deflection image rotating system comprises a first imaging lens group, a steering prism and a second imaging lens group, the first imaging lens group and the second imaging lens group are fixedly arranged relatively, the steering lens group only rotates once for imaging in the middle of the first imaging lens group, and imaging light is observed after the imaging light is along the large objective lens group, the zoom group, the first imaging lens group, the steering prism, the second imaging lens group, the small objective lens group and the eyepiece lens group.

Preferably, the focal length of the first and second imaging lens groups is a positive value and is between 12-88 mm.

Preferably, the first and second imaging lens groups are symmetrical with respect to the reflection surface of the turning prism.

Preferably, the first imaging lens group consists of at least one positive lens.

Preferably, the second imaging lens group consists of at least one positive lens.

Preferably, the turning prism is a roof prism capable of turning the inverted image of the intermediate image of the first turning lens into a positive image.

Preferably, the large objective lens group, the zoom group and the first imaging lens group are arranged along a first optical axis; the second imaging lens group and the small objective lens group are arranged along a second optical axis.

Further preferably, the turning prism is disposed at a crossing of the first optical axis and the second optical axis, and the first optical axis and the second optical axis are perpendicular to each other.

The working principle of the invention is as follows:

the imaging light of the object passes through a large objective lens group and a zoom group of the operating microscope to form parallel light, primary intermediate imaging is carried out through a first imaging lens group, the intermediate imaging is turned through primary reflection of an image turning prism, then inverted images of the intermediate imaging are turned into positive images and enter a second imaging lens group, and the parallel light from the second imaging lens group is observed after passing through a small objective lens group and an eyepiece group.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the invention reduces the divergence of light rays by carrying out primary intermediate imaging in the deflection image-rotating system; the lens groups on the two sides do not need to move relatively, so that the beam divergence is reduced, and the advantage of no shielding of a visual field is kept.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

fig. 2 is an optical schematic diagram of the present embodiment.

Wherein: 1. a main mirror body; 2. a binocular tube; 3. a large objective lens group; 4. zooming group; 5. a small objective lens group; 6. an eyepiece group; 7. 7', a positive lens; 8. roof prism.

Detailed Description

The invention is further described with reference to the following figures and examples:

as shown in fig. 1 and 2, the operating microscope includes a main lens body 1 and a binocular tube 2 connected to the main lens body 1, wherein the main lens body 1 can swing to both sides of the binocular tube 2 within a plane perpendicular to the binocular axis of the binocular tube 2 by using the binocular axis as a swing axis.

A large objective lens group 3 and a zoom group 4 are arranged in the main lens body 1; the binocular tube 2 is provided with a small objective lens group 5 and an eyepiece lens group 6. The operation microscope also comprises a deflection rotating image system, and the deflection rotating image system comprises a first imaging lens group, a steering prism and a second imaging lens group. In this embodiment: the first imaging lens group and the second imaging lens group are symmetrical relative to the reflecting surface of the steering prism, and concretely speaking: the first imaging lens group comprises three positive lenses 7, and the same second imaging lens also comprises three positive lenses 7'; the turning prism is a roof prism 8 capable of turning over the inverted image formed in the middle of the positive lens 7 into a positive image. The positive lenses 7 and 7' are fixed relatively, and the focal lengths of the two lenses are positive and between 12 mm and 88 mm. Big objective set 2, zoom group 4 and positive lens 7 set up AO along first optical axis, and positive lens 7', little objective set 5 set up along second optical axis OB, turn to prism 8 and set up in the intersection of first optical axis AO, second optical axis OB, and first optical axis AO, second optical axis OB are mutually perpendicular.

The imaging light of the object passes through the large objective lens group 3 and the zoom group 4 to form parallel light, primary intermediate imaging is carried out through the positive lens group 7, the intermediate imaging turns to the inverted image of the intermediate imaging through primary reflection of the roof prism 8 and then turns the inverted image into a positive image, the positive image enters the positive lens 7 ', and the parallel light formed by the positive lens 7' passes through the small objective lens group 5 and the ocular lens group 6 to be observed.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. An operating microscope comprises a main lens body and a binocular tube connected with the main lens body, wherein the main lens body can swing to two sides of the binocular tube by taking a binocular visual axis as a swing axis in a plane vertical to the binocular visual axis of the binocular tube, and a large objective group and a zoom group are arranged in the main lens body; the binocular tube in be provided with little objective lens group, eyepiece group, the operation microscope still include beat rotation image system, its characterized in that: the deflection rotation imaging system comprises a first imaging lens group, a steering prism and a second imaging lens group, wherein the first imaging lens group and the second imaging lens group are relatively and fixedly arranged, the steering prism only performs primary rotation on intermediate imaging of the first imaging lens group, imaging light rays emit parallel light rays along the large objective lens group and the zoom group and perform primary intermediate imaging through the first imaging lens group, the intermediate imaging turns inverted images of the intermediate imaging into positive images after being turned through primary reflection of the steering prism and enters the second imaging lens group, and the parallel light rays emitted from the second imaging lens group are observed after passing through the small objective lens group and the eye.

2. A surgical microscope according to claim 1, wherein: the focal lengths of the first imaging lens group and the second imaging lens group are positive values and are between 12 mm and 88 mm.

3. A surgical microscope according to claim 1, wherein: the first imaging mirror group and the second imaging mirror group are symmetrical relative to the reflecting surface of the steering prism.

4. A surgical microscope according to claim 1, wherein: the first imaging lens group consists of at least one positive lens.

5. A surgical microscope according to claim 1, wherein: the second imaging lens group consists of at least one positive lens.

6. A surgical microscope according to claim 1, wherein: the steering prism is a roof prism which can turn the inverted image of the middle image of the first imaging lens group into a positive image.

7. A surgical microscope according to claim 1, wherein: the large objective lens group, the zoom group and the first imaging lens group are arranged along a first optical axis; the second imaging lens group and the small objective lens group are arranged along a second optical axis.

8. An operating microscope according to claim 7 wherein: the steering prism is arranged at the intersection of the first optical axis and the second optical axis, and the first optical axis and the second optical axis are vertical to each other.