JPH09131318A - Ophthalmologic camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To know the preparation state of photographing in charge condition of a capacitor even when observing an eye to be examined. SOLUTION: This ophthalmologic camera is equipped with an illumination optical system 10 which illuminates an eye E to be examined, an observation.photographing optical system 30 which observes and photographs the illuminated eye to be examined, and a nameplate 41 which indicates the information concerning the eye to be examined. In a device which observes and photographs the information indicated on the nameplate 41 by the observation.photographing system 30 together with the eye E to be examined, the illumination state where the nameplate 41 is illuminated on a light emitting diode 42 is changed, according to the photographing preparation state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination optical system for illuminating an eye to be inspected, and an observation / imaging for observing / photographing the illuminated eye to be inspected.
The present invention relates to an ophthalmologic photographing apparatus including a photographing optical system and the like.

[0002]

2. Description of the Related Art Conventionally, a fundus camera shown in FIG. 9 is known as one of ophthalmic photographing apparatuses. In FIG. 9, 1 is an illumination optical system that illuminates the fundus Er of the eye E to be inspected, 2
Is an observation / photographing optical system for observing / photographing the fundus Er illuminated by the illumination optical system 1.

The illumination optical system 1 has a xenon lamp 1a that emits light when photographing the fundus Er, a halogen lamp 1b that illuminates the fundus Er during observation, and the like.

The observation / photographing optical system 2 is provided with a data optical system 3 so that the name of the subject and other data can be observed together with the fundus Er through the eyepiece 2a. The data optical system 3 includes a light emitting diode 3a for illuminating a name plate 4 on which a name and other data are written, a mirror 3b,
3c and an imaging lens 3d.

With this data optical system 3, the name plate 4 is photographed at a position adjacent to the fundus image together with the fundus image.

[0006]

By the way, when photographing the fundus Er, a capacitor is charged and a large current is passed through the xenon lamp 1a by this charging current to cause the xenon lamp 1a to emit light. Since the fundus Er is observed through the eyepiece lens 2a, there is a problem that it is very inconvenient because it is not known when the charging of the condenser is completed.

The present invention has been made in view of the above problems, and an object thereof is to make it possible to observe an eye to be examined,
An object of the present invention is to provide an ophthalmologic photographing apparatus that can confirm the preparation state for photographing such as the charged state of the capacitor.

[0008]

In order to achieve the above object, in the invention of claim 1, an illumination optical system for illuminating an eye to be inspected, an observation / photographing optical system for observing / photographing the illuminated eye to be inspected, A display unit that displays information about the eye to be inspected,
In an ophthalmologic photographing apparatus that observes and photographs the information displayed on the display unit by the observation and photographing optical system together with the eye to be examined, changing the display state of the information displayed on the display unit according to the photographing preparation state. Is characterized by.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fundus camera, which is one of the ophthalmologic photographing apparatuses according to the present invention, will be described below with reference to the drawings.

In FIG. 1, 10 is a fundus Er of an eye E to be examined.
Is an illuminating optical system for illuminating, and an observing / photographing optical system 30 for observing / photographing the illuminated fundus Er.

The illumination optical system 10 includes a concave reflecting mirror 13, a halogen lamp 14, a condenser lens 15, a xenon lamp 16, a condenser lens 17, a ring diaphragm 18, a total reflection mirror 19, a relay lens 20, a black dot plate 21, and a relay lens 22. Etc.

The observation / photographing optical system 30 includes an objective lens 3
1, perforated mirror 32, focusing lens 34, imaging lens 3
5, quick return mirror 36, field lens 3
7, a reflecting mirror 38, an eyepiece lens 39 and the like.

The observation / photographing optical system 30 includes a data optical system 4
0 is provided, and the data optical system 40 forms a plurality of light emitting diodes 42 for illuminating a name plate (display unit) 41, mirrors 43 and 44, and an image of the name plate 41 on the film F. It is composed of an image lens 45 and the like. The name plate 41 is replaceable, and is replaced every time the subject is changed. On the name plate 41, the name of the subject,
The shooting date and other data are described. 46
Is painted white on the backboard 46 that abuts the name plate 41.

FIG. 2 is a block diagram showing the configuration of the control system of the fundus camera. In FIG. 2, reference numeral 51 denotes a charging capacitor for causing the xenon lamp 16 to emit light, and 52
Is a light emitting circuit for making the xenon lamp 16 emit light, 53 is a voltage detecting circuit for detecting the voltage of the capacitor 51, and 54 is a light emitting diode control circuit for controlling the lighting state of the light emitting diode based on the voltage detected by the voltage detecting circuit 53. . Reference numeral 55 is a photographing switch.

Next, the operation of the above embodiment will be described.

When observing the fundus Er, the halogen lamp 14 and the light emitting diode 42 are first turned on. By turning on the halogen lamp 14, the condenser lens 15,
17, ring diaphragm 18, total reflection mirror 19, relay lens 2
0, black spot plate 21, relay lens 22, perforated mirror 32
The fundus Er is illuminated via the objective lens 31.
The reflected light flux reflected by the fundus Er is passed through the objective lens 31, the perforated mirror 32, the focusing lens 34, the imaging lens 35, the quick return mirror 36, the field lens 37, and the reflection mirror 38 to the eyepiece 39. And the fundus Er is observed.

On the other hand, the name plate 41 is illuminated by the light emitted from the light emitting diode 42, and the reflected light flux reflected by the name plate 41 is mirrors 43, 44, an imaging lens 45, a quick return mirror 36, a field lens 37 and a reflection mirror 3.
It reaches the eyepiece lens 39 through 8, and the name plate 41 is observed together with the fundus Er as shown in FIG.

In the case of photographing, an operation switch (not shown) is operated to set the photographing mode. When this photographing mode is set, the capacitor 51 in FIG. 2 is charged, and the voltage between both terminals of the capacitor 51 rises with this charging, and the voltage detection circuit 53 detects the voltage.

When the detection voltage detected by the voltage detection circuit 53 is equal to or lower than a predetermined voltage, that is, when the charging (imaging preparation state) is not completed, the light emitting diode control circuit 54 keeps constant as shown in A of FIG. The light emitting diode 42 is turned on and the light emitting diode 42 is blinked every cycle. Due to this blinking, the name plate 41 seen through the eyepiece lens 39 is visible or invisible, and the name plate 41 is observed in a blinking state. It can be seen from the blinking state of the name plate 41 that charging has not been completed.

The name plate 41 is observed at a position adjacent to the fundus Er, and the name plate 41 is large.
The blinking state of 1 is never overlooked, and the uncompleted state of charging can be surely known. When the name board 41 is not attached, the backboard 46 is illuminated by the light emitting diode 42.
By being painted white, the lighting state of the light emitting diode 42 can be recognized.

Further, since the light emitting diode 42 for illuminating the name plate 41 is used to inform the charging state of the capacitor 51, it is not necessary to provide a new display section for notifying the charging state, and therefore the display thereof is performed. It is not necessary to secure a space for parts and it is possible to prevent the apparatus from becoming large.

When the charging of the capacitor 51 is completed, the voltage between both terminals of the capacitor 51 becomes a predetermined voltage or higher, and the voltage detection circuit 53 detects that the voltage becomes a predetermined voltage or higher. Then, the light emitting diode control circuit 54
Since the detection voltage of the voltage detection circuit 53 is equal to or higher than the predetermined voltage, the light emitting diode 42 is continuously turned on. With this continuous lighting, the name plate 41 changes from a blinking state to a continuous display state,
The examiner can know that the charging (imaging preparation state) is completed.

Then, the examiner presses the photographing switch 55.
As a result, the light emitting circuit 52 operates, the charging current of the capacitor 51 is supplied to the xenon lamp 16, and the xenon lamp 16 emits light. By this light emission, the condenser lens 17, the ring diaphragm 18, the total reflection mirror 19, the relay lens 2
0, black spot plate 21, relay lens 22, perforated mirror 32
The fundus Er is illuminated via the objective lens 31.

On the other hand, as the quick return mirror 36 jumps up, the reflected light flux reflected by the fundus Er reaches the film F through the objective lens 31, the perforated mirror 32, the focusing lens 34 and the imaging lens 35, and this A fundus image is formed on the film F, and the fundus Er is photographed together with the name plate 41 as shown in FIG.

In the above embodiment, when the capacitor 41 is in the uncharged state, the light emitting diode 42 blinks at a constant cycle. However, as shown in FIG. 4B, the blinking cycle is shortened as the charging voltage increases. Then, it may be notified that the charging completion state is near.

In the above embodiment, the capacitor 4
Although the charging state of No. 1 is notified by the lighting state of the light emitting diode 42, for example, the state of alignment (imaging preparation) may be notified.

In this case, for example, as shown in FIGS. 4C and 4D, when the alignment is completed and the capacitor 41 is uncharged, the light emitting diode 42 is turned on at the time t1 every cycle T1.
When the capacitor 41 is completely charged and the alignment is not completed, the lighting time t2 is set for each cycle T1 and the blinking cycle is shortened within the lighting time t2 to blink the light emitting diode 42. To go. Then, when the alignment is not completed and the charging is not completed, as shown in FIG.
As indicated by E, the lighting and blinking are alternately performed. Turn on continuously when alignment and charging are completed.

Further, in the above embodiment, the charging state and the alignment state are notified by the blinking state of the light emitting diode 42 or the like. However, a plurality of light emitting diodes having different light emitting colors are provided to correspond to the charging state and the alignment state. By lighting or blinking the light emitting diode, the color illuminated on the name plate 41 may be changed to notify the state of charging or alignment.

FIG. 5 shows the second embodiment. In the second embodiment, the television camera 60 captures a fundus image and the monitor 61 observes the fundus. is there. In FIG. 5, reference numeral 62 is an image forming lens, 63 is a light receiving element such as a CCD, and 64 is a television camera 6.
It is a recording device for recording a fundus image imaged by 0.

In this embodiment, when the recording device 64 is not in the recording preparation completed state (imaging preparation completed state) instead of informing the alignment incompletion, for example, as shown in D of FIG. 42 may be blinked in a short cycle to notify. In addition, lighting / blinking and color may be combined to notify the alignment and the recording ready state. Furthermore, the combination of lighting / blinking and color allows the captured image to be recorded on an optical disc,
Whether it is stored on a floppy or video tape,
That is, it may be notified which recording medium is in a ready state (shooting ready state) for shooting.

FIG. 6 shows a third embodiment. In the third embodiment, a display section 70 made of a light emitting diode or a liquid crystal is provided instead of the name plate 41, and the name and the shooting date are displayed on the display section 70. In the third embodiment, the display unit 70 itself is blinked as shown in FIG. 4 to notify the charging state and the alignment state.

FIG. 7 is a block diagram showing the configuration of the control system of the third embodiment. In FIG. 7, reference numeral 71 controls the lighting state of the display section 70 according to the voltage detected by the voltage detection circuit 53. Is a display control circuit.

FIG. 8 shows a fourth embodiment, and this fourth embodiment shows a fundus camera capable of performing visible and infrared fluorescence imaging.

In FIG. 8, reference numeral 82 is an insertion / removal mechanism for adjusting the amount of illumination light, and 83 is an insertion / removal mechanism for an exciter filter. The insertion / removal mechanism 82 is roughly composed of an ND filter 84, a dummy filter 85, and a solenoid 86, and the insertion / removal mechanism 83 is an exciter filter 87 and a dummy filter 88.
And a solenoid 89.

Reference numeral 90 is an insertion / removal mechanism for the barrier filter, and the insertion / removal mechanism 90 is roughly composed of a barrier filter 91, a dummy filter 92, and a solenoid 93.

In the case of observation, the dummy filters 35, 3
When 8,92 is inserted in the optical path and film shooting is used,
An ND filter 84 is inserted in the optical path instead of the dummy filter 35.

At the time of infrared fluorescence photography, the exciter filter 37 and the barrier filter 91 are inserted in the optical path, and the TV
The ND filter 34 is inserted in the optical path when the camera 100 shoots, and the dummy filter 3 is used when film shooting.
5 is inserted in the optical path.

In this embodiment, since the TV camera 100 for black and white is used, the charging state and the alignment state are indicated by the blinking state of the light emitting diode 42. In addition, 101 is a CCD.

[0039]

According to the present invention, even when the eye to be inspected is being observed, the preparation state for photographing such as the charged state of the capacitor can be known.

[Brief description of the drawings]

FIG. 1 is an optical layout diagram showing the layout of an optical system of a fundus camera according to the present invention.

FIG. 2 is a block diagram showing a configuration of a control system of the fundus camera.

FIG. 3 is an explanatory diagram showing an observed fundus and name plate.

FIG. 4 is a time chart illustrating the lighting and blinking states of a light emitting diode.

FIG. 5 is an explanatory diagram showing a second embodiment.

FIG. 6 is an explanatory diagram showing a third embodiment.

FIG. 7 is a block diagram showing a configuration of a control system according to a third embodiment.

FIG. 8 is an explanatory diagram showing a fourth embodiment.

FIG. 9 is an explanatory diagram showing an optical system of a conventional fundus camera.

[Explanation of symbols]

 10 ... Illumination optical system 30 ... Observation / shooting optical system 41 ... Name plate 42 ... Light emitting diode E ... Eye to be examined

Claims (1)

[Claims] 1. An observing / photographing optical system comprising: an illumination optical system for illuminating an eye to be examined; an observing / photographing optical system for observing / photographing the illuminated subject's eye; and a display section for displaying information on the subject's eye. In an ophthalmologic imaging apparatus for observing / photographing the information displayed on the display unit together with the eye by a system, the ophthalmology characterized in that the display state of the information displayed on the display unit is changed according to the imaging preparation state. Imaging device.