JP2010259606A5

JP2010259606A5 -

Info

Publication number: JP2010259606A5
Application number: JP2009112318A
Authority: JP
Filing date: 2009-05-01
Publication date: 2012-06-07
Anticipated expiration: 2029-05-01

Description

上記課題を解決するために、本発明は以下のような構成を備えることを特徴とする。
（１）波長の異なる照明光をそれぞれ出射する光源部と，前記照明光を眼底に対して２次元的に走査する走査部とを有する照射光学系と、前記照明光により照明された眼底からの反射光を受光するための受光素子を持つ受光光学系と、被検者眼の固視を誘導するための固視光を出射する固視光源と、を有し、前記受光素子の受光信号に基づいて眼底画像を得る眼科撮影装置において、前記光源部は、蛍光眼底画像を撮影するための励起光を出射する励起光源を備え、励起光によって眼底に生じた蛍光を透過させると共に励起光及び固視光を遮断する光学特性を有するバンドカットフィルタを持つフィルタユニットであって，前記照明光学系と共用されない前記受光光学系の光路に前記バンドカットフィルタを挿脱可能に配置するフィルタユニットと、を備えることを特徴とする。
（２）（１）の眼科撮影装置において、前記バンドカットフィルタは、励起光を遮断し，蛍光を透過させる光学特性を持つ第１フィルタ層と、固視光を遮断し，少なくとも蛍光を透過させる光学特性を持つ第２フィルタ層と、を有することを特徴とする。
（３）（１）又は（２）のいずれかの眼科撮影装置において、前記光源部はさらに赤外光を出射する赤外光光源を有し、前記光源部から赤外光を出射し赤外の眼底画像を得る赤外撮影モードと，前記光源部から励起光を出射し蛍光眼底画像を得る蛍光撮影モードとの切換え設定をするためのモード切換手段を備え、前記フィルタユニットは、前記モード切換手段による設定に基づいて、前記バンドカットフィルタを前記光軸に挿入することを特徴とする。
In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) An irradiation optical system having a light source unit that emits illumination light having different wavelengths, a scanning unit that scans the illumination light two-dimensionally with respect to the fundus, and a fundus illuminated by the illumination light. A light receiving optical system having a light receiving element for receiving reflected light, and a fixation light source for emitting fixation light for inducing fixation of the subject's eye, the light receiving signal of the light receiving element In the ophthalmologic photographing apparatus for obtaining a fundus image based on the light source unit, the light source unit includes an excitation light source that emits excitation light for photographing a fluorescence fundus image, and transmits fluorescence generated in the fundus by the excitation light, and transmits the excitation light and the fixed light. a filter unit having a band-cut filter having an optical characteristic for blocking visual light, filter uni be arranged removably to the band cut filter in the optical path of the light receiving optical system which is not shared with the illumination optical system It is characterized by providing with a lid.
(2) In the ophthalmologic photographing apparatus according to (1), the band cut filter includes a first filter layer having an optical characteristic that blocks excitation light and transmits fluorescence , and blocks fixation light and transmits at least fluorescence . And a second filter layer having optical characteristics.
(3) In the ophthalmologic photographing apparatus according to any one of ( 1) and (2) , the light source unit further includes an infrared light source that emits infrared light, and infrared light is emitted from the light source unit. Mode switching means for switching between an infrared imaging mode for obtaining a fundus image and a fluorescence imaging mode for obtaining a fluorescent fundus image by emitting excitation light from the light source unit, and the filter unit includes the mode switching The band cut filter is inserted into the optical axis based on setting by means.

Claims

An irradiation optical system having a light source unit that emits illumination light having different wavelengths, a scanning unit that scans the fundus in two dimensions, and reflected light from the fundus illuminated by the illumination light; A light receiving optical system having a light receiving element for receiving light, and a fixation light source for emitting fixation light for inducing fixation of the subject's eye, and based on a light reception signal of the light receiving element In an ophthalmologic photographing apparatus that obtains an image,
The light source unit includes an excitation light source that emits excitation light for capturing a fluorescent fundus image ,
A filter unit having a band cut filter having optical characteristics that transmits fluorescence generated in the fundus by excitation light and blocks excitation light and fixation light , and is in an optical path of the light receiving optical system that is not shared with the illumination optical system. A filter unit for detachably placing the band cut filter;
An ophthalmologic photographing apparatus comprising:

The ophthalmologic photographing apparatus according to claim 1.
The band cut filter is
A first filter layer having an optical property of blocking excitation light and transmitting fluorescence ;
A second filter layer having an optical property of blocking fixation light and transmitting at least fluorescence ;
An ophthalmologic photographing apparatus comprising:

In the ophthalmologic photographing apparatus according to claim 1 or 2 ,
The light source unit further includes an infrared light source that emits infrared light,
Mode switching for switching between an infrared imaging mode in which infrared light is emitted from the light source unit to obtain an infrared fundus image and a fluorescence imaging mode in which excitation light is emitted from the light source unit to obtain a fluorescence fundus image With means,
The ophthalmologic photographing apparatus according to claim 1, wherein the filter unit inserts the band cut filter into the optical axis based on a setting by the mode switching means.