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fundus camera

A camera and photographic optics technology, applied in ophthalmoscopes, eye testing equipment, medical science, etc., can solve problems such as inconvenient use, achieve convenient operation, compact structure, and overcome difficult alignment

Active Publication Date: 2015-11-18
SHENZHEN DIANBANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of alignment method aligns the eye to be inspected by adjusting the device, which needs to be adjusted while observing to align, and after alignment, once the gaze direction of the eye to be inspected changes, the device must be readjusted for alignment. Inconvenient to use

Method used

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Embodiment Construction

[0023] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.

[0024] Such as figure 1 The optical system of the fundus camera shown includes an illumination optical system, a lure optical system and a photographic optical system.

[0025] The illumination optical system includes an illumination light source 11, an insertable 490nm narrow bandpass filter 12, an illumination reflector 14, a partial reflector 19, a lure lens 20, a hollow reflector 3 and a connecting lens arranged in sequence along the transmission direction of the illumination optical path. The objective lens 2, wherein the illumination source 11 is a replaceable white LED spotlight or an infrared LED spotlight. In the illumination optical system, the light emitted by white LED spotlights or infrared LED spotlights illuminates the fundus of the eye 1 through the illumination system, so that the photographic optical system...

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PUM

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Abstract

The invention discloses an fundus photographic optical system, which comprises a photographic optical system, an illumination optical system and a perspective optical system, wherein the illumination optical system comprises a hollow reflecting mirror; the perspective optical system comprises a light-emitting element and a partition board which are arranged in sequence towards the optical path transmission direction of an examined eye; the perspective optical system, the illumination optical system and the photographic optical system share the hollow reflecting mirror and an eye objective lens; the optical axis of the prospective optical system reflected by the hollow reflecting mirror is common with the optical axis of the prospective optical system reflected by the hollow reflecting mirror; the partition board is optically conjugate with the pupil of the examined eye. The partition board is imaged on the examined fundus via the prospective optical system after being lightened by the light-emitting element, so that the looking direction of the examined eye is in accordance with the optical axis of the photographic optical system, active guidance of the examined eye is realized, and alignment is realized. The fundus photographic optical system disclosed by the invention has the advantages of compact structure, easiness and convenience in operating and capability of shooting clear and accurate fundus images.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a fundus photographic optical system in fundus inspection equipment. Background technique [0002] In order to realize the inspection of abnormalities or diseases of the fundus of the eye to be inspected, the fundus inspection equipment provided by the prior art, such as the fundus camera, etc., uses the original photosensitive film to take pictures, but the picture effect is poor, and the examiner needs to observe the fundus image through the eyepiece. Optical systems are very complex. Existing fundus inspection equipment, such as fundus cameras, use halogen lamps as the lighting source and need to be equipped with complex light filtering systems, making the lighting optical system very complicated, heavy equipment, large power consumption, and short lifespan. To this end, a Chinese patent application with application number 201210097315.3 proposes a fundus inspection device, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/12A61B3/14A61B3/15
Inventor 刘萍谭芸肖业卫
Owner SHENZHEN DIANBANG TECH