Handheld slit lamp microscope

A slit lamp microscope, handheld technology, applied in ophthalmoscope, medical science, eye testing equipment, etc., can solve the problems of short distance, observation optical system can not be continuously zoomed, can not zoom, etc.

Pending Publication Date: 2018-04-06
GUANGZHOU SHIJIA MEDICAL INSTR EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Moreover, due to the short distance between the objective lens and the objective lens, it is impossible to insert a movable intermediate objective lens into the observation optical system like a stereo microscope for continuous zooming
Therefore, the observation optical system of the previous hand-held slit lamp microscope cannot continuously zoom

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment one, such as figure 1 and figure 2 Shown is the external view of this embodiment, as the external view of the handheld slit lamp microscope of the present invention.

[0031] It can be seen that the hand-held slit lamp microscope of this embodiment includes an illumination device 1, an observation device 2, and a base 3. The illumination device 1 is a cylinder installed on the base 3, and an illumination optical system 10 is arranged in the cylinder as an illumination device. The cylinder and the base 3 are vertically arranged, the reflective prism 11 in the illumination optical system 10 is arranged on the top of the cylinder, the observation device 2 is installed on the base 3 through the handle 5, the light beam of the illumination device 1 and the observation device 2 The observation optical path is vertical, and two symmetrical observation optical systems 20 are arranged on the observation device 2 to facilitate observation by two eyes.

[0032] In ad...

Embodiment 2

[0061] In this embodiment, on the basis of the first embodiment, the linkage mechanism 27 and the drive unit 25a are omitted.

[0062] After controlling the objective lens drive unit 21a by using the zoom lever 5F to control and drive the objective lens 21 to move forward and backward in the direction of the optical axis of the observation optical path, manually move the eyepiece 25 to an appropriate position.

[0063] The proper position of the above-mentioned eyepiece 25 is that the distance between the eyepiece 25 and the cornea Ec of the subject's eye E is [S o +F 21 *S o / (S o -F 21 )+F 25 ] at.

[0064] In addition, the eyepiece diaphragm 23 is connected with the eyepiece 25 and moves together.

Embodiment 3

[0066] In this embodiment, on the basis of the first embodiment, the interlocking mechanism 27 and the eyepiece driving unit 25 a are canceled, and the eyepiece 25 is fixed to the observation device 2 . An unillustrated two-position sliding structure is added to the base 3, the lighting device 1 is fixed to the front section of the base 3, and the observation device 2 is fixed to the rear section of the base 3. The above-mentioned two-stage position sliding structure can make the illuminating device 1 and the observation device 2 move relative to each other in two stages.

[0067] After controlling the objective lens drive unit 21a by using the zoom lever 5F to drive the objective lens 21 to advance and retreat in the direction of the optical axis of the observation optical path, manually move the observation device 2 to a proper position.

[0068] The appropriate position of the observation device 2 is that the distance between the eyepiece 25 and the cornea Ec of the subject...

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PUM

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Abstract

The invention provides a handheld slit lamp microscope which comprises an illumination optical system for projecting illumination beams on the cornea, and an observation optical system for amplifyingreflected light from the cornea of an examined eye and guiding the reflected light to the eyepiece exit pupil; the illumination optical system is arranged inside an illumination device on a base, andthe illumination path of the illumination device is perpendicular to the plane where the base is located; the observation optical system is provided with a linkage mechanism for linkage of an objective lens and the eyepiece, and the linkage mechanism moves the objective lens to the portion, [So+F21*So / (So-F21)+F25] away from the cornea of the examined eye. Forward motion of the objective lens along the optical axis of the objective lens is automatically achieved so that the multiplying power of a generated intermediary image can become larger and the intermediary image can move backwards, andthe eyepiece moves backwards along the optical axis of the eyepiece so that the intermediary image can be imaged to the eyepiece exit pupil.

Description

technical field [0001] The invention relates to a slit lamp microscope, in particular to a hand-held slit lamp microscope in which a fixed-focus objective lens and an eyepiece are driven by a motor to realize continuous variable magnification of an observation optical system. Background technique [0002] Slit lamp microscope is an essential and important instrument for eye examination. The slit lamp microscope is composed of an illumination system and a binocular microscope. It can not only observe superficial lesions very clearly, but also can adjust the focus and the width of the light source to make an "optical section" so that lesions in deep tissues can also be clearly displayed. . [0003] At present, the general structure of a hand-held slit lamp microscope includes: an illumination optical system, which projects an illumination beam of a specific shape on the cornea; an observation optical system, which amplifies the reflected light from the above-mentioned cornea ...

Claims

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Application Information

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IPC IPC(8): A61B3/135
CPCA61B3/0008A61B3/0075A61B3/135
Inventor 林一民勾人格何武杨
Owner GUANGZHOU SHIJIA MEDICAL INSTR EQUIP
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