JPH0515496A - Ophthalmology equipment - Google Patents

Abstract

PURPOSE:To provide an ophthalmology equipment which can take a clearer (or darker) picture while the quantity of light emission of a photographing light source is being indicated so as to be affirmed when a picture by the quantity of light emission automatically set is not required but the clearer (or darker) picture is required. CONSTITUTION:This ophthalmology equipment is equipped with a CPU circuit 6 which allows the quantity of light emission of a xenon lamp 8 to be automatically set in response to conditions set by a photographing condition setting means A, and also is characterized by the provision of a light emitting diode L10A through L10I indicating the quantity of light emission of the xenon lamp 8 set by the CPU circuit 6 and a photographing information display section 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus adapted to correct the amount of light emitted from a photographing light source.

[0002]

2. Description of the Related Art In a conventional fundus camera, the light emission amount of a photographing light source is automatically set by setting the sensitivity of a film used for photographing, and a one-step correction of about ± 1/2 EV is possible. Things are being considered.

With this fundus camera, it is possible to perform normal shooting without failure if shooting is performed with an automatically set light emission amount, and it is sufficient if the light amount correction can be performed in one step of about ± 1/2 EV. Did not need to know the amount of light emitted by the shooting light source.

Therefore, conventionally, the sensitivity of the film is simply set without displaying the light emission amount of the photographing light source.

[0005]

By the way, some users desire to always have a brighter (or darker) photograph than the automatically set light emission amount.
In some cases, a one-step correction of about V may be small.

However, in the past, such a hope could not be achieved because only one-step correction was possible.

Further, since the amount of light emitted from the photographing light source is not displayed, the user cannot confirm the amount of emitted light, and there is a possibility that photographing fails due to forgetting to switch the light amount correction switch.
In some cases, it was not always possible to shoot as desired.

Therefore, according to the present invention, even when a lighter (or darker) photograph is always desired instead of the automatically set light emission amount, the lighter (or darker) photograph can be obtained, and the photographing in that case is performed. It is an object of the present invention to provide an ophthalmologic apparatus capable of displaying and confirming the light emission amount of a light source.

[0009]

In order to achieve this object, the invention of claim 1 projects illumination light from a photographing light source onto the fundus of the eye to be examined through an illumination optical system so that the fundus from the eye to be examined is projected. The ophthalmologic apparatus includes an arithmetic control unit that guides the fundus image of the eye to be inspected by the reflected light of the subject to the image capturing apparatus by the image capturing optical system and automatically sets the light emission amount of the image capturing light source according to the condition set by the image capturing condition setting unit. The apparatus is an ophthalmologic apparatus provided with display means for displaying the light emission amount of the photographing light source set by the arithmetic control means.

Further, in the invention of claim 2, the display means is provided so as to be observable through a viewfinder of an observation optical system, and the arithmetic control of the light emission amount of the photographing light source and other photographing information is performed. It is set to be switched and displayed by means.

Further, in the invention of claim 3, the light emission amount displayed on the display means is controlled by the arithmetic control means so that the same content is displayed until the photographing condition is changed by the photographing condition setting means. .

According to a fourth aspect of the present invention, the illumination light from the photographing light source is projected onto the fundus of the eye to be examined through the illumination optical system, and the fundus image of the eye to be examined by the reflected light from the fundus of the subject eye is taken to the optical system. The ophthalmologic apparatus is provided with an arithmetic control unit for automatically setting the light emission amount of the photographing light source according to the condition set by the photographing condition setting unit by the photographing condition setting unit. A storage unit is provided for storing the shooting condition setting state.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

[First Embodiment] FIGS. 1 to 4 show a first embodiment in which the present invention is applied to a fundus camera which is an ophthalmologic apparatus.

In FIG. 3, reference numeral 1 is a movable table mounted on a fixed table (base) (not shown) so as to be movable back and forth, left and right, and 2 is a joystick mounted on the movable table 1 so as to be tiltable in any direction. Lever 3 is a shutter switch attached to the upper end of joystick lever 2.

Reference numeral 4 is a fundus camera body mounted on the movable table 1, and 5 is a 35 mm camera detachably mounted on the fundus camera body 4.

In FIG. 1, the fundus camera includes a CPU circuit 6 (arithmetic control means) as arithmetic control means, a xenon charging / discharging circuit 7 controlled by the CPU circuit 6, and photographing controlled by the charging / discharging circuit 7. Xenon lamp 8 (photographing light source).

The CPU circuit 6 includes an image pickup device selecting section 9, a xenon light quantity switching section 10 and a fluorescent filter operating section 1 shown in FIG.
A signal from the photographing condition setting means such as 1 is input, and a signal from the shutter switch 3, the reference light amount setting changeover switch 12 and the like is input. The photographing device selection unit 9, the xenon light amount switching unit 10, the fluorescence filter operation unit 11
Are provided on the movable table 1.

The reference light amount setting changeover switch 12 is arranged in the movable table 1 so that it cannot be easily operated from the outside. The reference light amount setting changeover switch 12 can be turned ON / OFF by opening a lid or the like (not shown). You can do it.

As shown in FIG. 2, the photographing device selection section 9 has an upper switch 9A for the 35 mm camera 5, an upper switch 9B for polaroids, and a lower switch 9C as photographing device selection switches.

The xenon light amount switching unit 10 changes the xenon light amount to 18, 25, 36, 50, 75, 100, 150, 2.
Switches 10A to 1 for stepwise switching to 00,300
It has 0I as a xenon light quantity changeover switch.

The fluorescent filter operating section 11 has fluorescent filter switches 11A and 11B for putting the exciter filter and the barrier filter in the illumination light path and the photographing light path, respectively.

Switches 9A, 9B, 9C, 10A-10
I, 11A and 11B are arranged as shown in FIG. Moreover, each switch 9A, 9B, 9C, 10A-1
0I, 11A and 11B are light emitting diodes L9A, L9B, L9C and L10A to L10 shown in FIG. 1 when turned on.
10I, L11A and L11B (display means) are lit and displayed from the inside.

The light emitting diodes L9A, L9B, L9
Lighting of C, L10A to L10I, L11A, L11B
It is performed by the CPU circuit 6.

Further, a rewritable memory M such as an EEPROM is connected to the CPU circuit 6 as a storage unit, and the memory M stores the photographing conditions (photographing information) changed and set by the respective switches described above. It Then, the CPU circuit 6 is designed to perform shooting based on the shooting information stored in the memory M, and the power is turned off unless a change operation is performed.
However, the shooting information stored in the memory M is not erased. The memory M is a rewritable RO.
If it is M, it can be used without limitation to the EEPROM, and a non-volatile memory can also be used.

Next, the control of the CPU circuit 6 will be described with reference to the flowchart of FIG.

[Shooting Mode] Step S1 When the power source is turned on and started, it is judged whether or not the reference light amount setting switch 12 is turned on. If not, the process proceeds to step S2 and turned on. If step S1
Move to 0.

Step S2: It is judged whether or not the switches 9A to 9C of the photographing device selecting section 9 are switched, and if they are switched, step S3.
To step S4, and if not switched to step S4.

Step S3 In this step, the xenon light quantity is automatically set corresponding to the switched switches 9A to 9C in the photographing device selecting section 9, that is, the light quantity is, for example, 3 if the switch 9A.
6 and the switch 9B has a light intensity of, for example, 36
If the switch 9C is used, the light amount is switched to 25, for example. At this time, the light emitting diodes L9A to L9C corresponding to the switched switches 9A to 9C are turned on to illuminate the light switched portions of the switches 9A to 9C, which is selected, and the process proceeds to step S4. To do.

Step S4 In this step, the fluorescence filter switches 11A and 11B are
It is determined whether or not is operated (ON), and if turned on, the process proceeds to step S5, and if not turned on, step S6.
Move to.

Step S5 In this step, the fluorescence filter switch 11A is turned on, and when the exciter filter is put in the illumination optical path, the xenon light amount is set to, for example, 75, while the fluorescence filter switches 11A and 11B are turned on. Then, when the exciter filter is put in the illumination optical path and the barrier filter is put in the photographing optical path, the xenon light quantity is set to 100, for example.

At this time, the switched switches 11A, 11
The light emitting diodes L11A and L11B corresponding to B are turned on to illuminate the switched portions of the switches 11A and 11B, which is selected, and the process proceeds to step S6.

Step S6 In this step, it is judged whether or not the xenon light quantity changeover switch, that is, the switches 10A to 10I have been changed, and if so, the process proceeds to step S7, and if not changed. Control goes to step S8.

Step S7 In this step, the amount of xenon light automatically set in steps S3, 5 and the like is changed to the value of the pressed one of the switches 10A to 10I, and the process proceeds to step S8.

At this time, the switched switches 10A to 10A
The light emitting diodes L10A to L10I corresponding to I are turned on to illuminate the switched portions of the switches 10A to 10I, which is selected, and the process proceeds to step S8.

Steps S8, 9 In this step, the shutter switch 3 is pressed and turned on.
If it is pressed, the process proceeds to step S9, and the xenon charging / discharging circuit 7 causes the xenon lamp 8 to emit light based on the xenon light amount set in steps S3, 5, 7, and the like. As a result, the fundus of the eye to be inspected is imaged by the selected imaging device.

If not pressed, step S2
Return to step S2 and loop to prepare for the next shooting.
If the shooting condition is not changed in 5, the shooting can be performed under the same condition, and if the shooting condition is changed in steps S2 to S5, the shooting is performed under the changed condition.

Such a photographing condition setting state is stored in the memory M every time it is changed in steps S2 to S5 as described above, and is used for the photographing immediately after the change and the next photographing after this photographing, or the power is turned off. It will also be used for the next shooting after that.

[Reference Light Amount Change Mode] Step S10 When the process shifts from step S1 to this step, one of the light emitting diodes 9A to 9C corresponding to the photographing device selecting switch and the light emitting diode 10A of the xenon light amount changing switch are selected. The currently selected one of -10I is turned on, and the process proceeds to the next step S11.

Step S11 In this step, it is judged whether or not the photographing apparatus selection switch has been switched, and if it has been switched, Step S1
2, and if not switched, step S13
Move to.

Step S12 In this step, of the switches 10A to 10I (xenon light amount changeover switch), the one set corresponding to the changed photographing device selection switch is turned on, and the changed photographing device is selected. The level at which the amount of xenon light is emitted and the image is captured is specified, and the process proceeds to step S13.

Step S13 In this step, the fluorescence filter switches 11A and 11B are
It is determined whether or not has been switched. If so, the process proceeds to step S14, and if not, the process proceeds to step S15.

Step S14 In this step, of the switches 10A to 10I (xenon light amount changeover switches), the ones set corresponding to the changed fluorescent filter switches 11A and 11B are turned on, and the image pickup apparatus is set to xenon. The level at which the amount of light is emitted and the image is captured is specified, and the process proceeds to step S13.

Step S15 Here, immediately before the time point of the determination in step S15, either one of the image pickup device selected and displayed in step S10, the image pickup device selected in steps S12 and S14, or the fluorescence filter switch is supported. And switch 1
One of 0A to 10I (xenon light amount changeover switch) is selected.

In this step, it is judged whether or not the xenon light amount changeover switch, that is, the switches 10A to 10I corresponding to the selected photographing device or fluorescence filter switch has been changed, and if so, the process proceeds to step S16. , If not switched, step S
Loop back to 11.

Steps S16 and S17 In this step, the diodes L10A to L10I corresponding to the xenon light quantity changeover switch, that is, the switch 10A to 10I selected in step S15 are turned on.

As a result, the selected and switched portion of the switches 10A to 10I is illuminated, and which switch 10A to 10I has been selected corresponding to the image pickup device or the fluorescence filter currently selected immediately before step S15 is specified. To be done.

After this relationship is stored in the memory M in step S17, the process returns to step S11 to loop.

When the reference light amount setting changeover switch 12 is turned off and the power of the fundus camera is turned on again after the above-mentioned setting is completed, the photographing is performed under the conditions set in and after step S10.

[Second Embodiment] In the embodiment described above, the currently selected xenon light quantity is displayed by the switches 10A to 10I (xenon light quantity changeover switch) provided on the movable table 1. It is not necessarily limited to this.

For example, the display means for displaying the light emission amount of the photographing light source is provided so as to be observable through the viewfinder of the observation optical system, and the light emission amount of the photographing light source and other photographing conditions are switched by the arithmetic control means. You may set so that it can be displayed. 5 to 8 show this example.

In FIG. 5, a xenon light amount correction switch 20 is provided in place of the switches 10A to 10I (xenon light amount changeover switch) of the above embodiment, and a display for displaying the light emission amount of the photographing light source is provided in the middle of the observation optical system. Device 2
2 is provided so that the photographing information display section 22a of the display means can be confirmed in the lower part of the finder 21 of the observation optical system, that is, the finder 21 of the 35 mm camera 5 shown in FIG.

The xenon light amount correction switch 20 has a + switch 20A for increasing the light emission amount, a 0 switch 20B for not changing the light emission amount, and a − switch 20 for decreasing the light emission amount.
Has C.

The CPU circuit 6 displays the elapsed time after the start of shooting on the shooting information display section 22a, and when the xenon emission amount correction switch 20 is operated, the shooting information display section 2a.
The time display of 2a is switched to the display of the xenon emission amount.

In such a configuration, the CPU circuit 6 has the configuration shown in FIG.
Each part is controlled according to the flowchart as shown in FIG.

In FIG. 8, the difference from the first embodiment is only that the display of the xenon light quantity can be confirmed by the observation optical system. Therefore, only the different points will be described.

[Photographing Mode] When the process proceeds from step S4, 5 to step S6, it is determined whether the xenon light amount switch, that is, the xenon light amount correction switch 20 is operated.
If it is operated, the time display of the photographing information display unit 22a is switched to the display of the xenon emission amount, and the process proceeds to step S8.

At this time, each time the + switch 20A of the xenon light quantity correction switch 20 is pressed, the light quantity display of the photographing information display section 22 increases, and each time the-switch 20C is pressed, the light quantity display of the photographing information display section 22 decreases. To do.

The steps S1 to S5, S8 and S9 are the first
Same as the embodiment.

[Reference Light Amount Change Mode] When step S1 shifts to step S10, in step S10, the xenon light amount of the currently selected photographing device is displayed on the photographing information display section 22a, and the process shifts to step S11.

When the photographing device selection switch is switched in step S11, the process proceeds to step S12, the xenon light amount of the selected photographing device is displayed on the photographing information display section 22a, and the process proceeds to step S13.

In step S13, the fluorescence filter switch 1
When 1A and 11B are switched, the process proceeds to step S14, and the photographing device causes the photographing information display portion 22a to display at what level the xenon light amount is emitted and the image is photographed, and step S1
Go to 5.

When the xenon light amount correction switch 20 is operated in step S15, the process proceeds to step S16 to display the xenon light amount on the photographing information display section 22a, and then to step S17, the xenon light amount changed by the above operation is displayed. Memory M corresponding to the currently selected imaging device
Is stored as a shooting condition setting state.

[0064]

[Effect] Since the present invention is configured as described above, even if a user wants a bright (or dark) photo instead of the automatically set light emission amount, this bright (or dark) photo is required.
Can be obtained, and the amount of light emitted by the photographing light source in that case can also be displayed and confirmed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a control circuit used in an ophthalmologic apparatus of the present invention.

FIG. 2 is an explanatory view of the arrangement of switches provided on the movable table in FIG.

FIG. 3 is a side view of an ophthalmologic apparatus having the configurations of FIGS. 1 and 2.

FIG. 4 is a flowchart used to explain a CPU circuit shown in FIG.

FIG. 5 is a block diagram showing a second embodiment of the control circuit used in the ophthalmologic apparatus of the present invention.

FIG. 6 is a layout explanatory diagram of switches provided on the movable table in FIG. 5;

7 is an explanatory view of a viewfinder of the 35 mm camera shown in FIG.

8 is a flowchart used for explaining the CPU circuit shown in FIG.

[Explanation of symbols]

4 ... Fundus camera body 5 ... 35mm camera (shooting device) 6 ... CPU circuit (arithmetic control means) 8 ... Xenon lamp (light source for photography) 21 ... Finder 22a ... Shooting information display section (display means) A ... Shooting condition setting means L10A to L10I ... Light emitting diode (display means)

Claims (4)

[Claims] 1. An illumination light from a photographing light source is projected onto a fundus of a subject's eye through an illumination optical system, and an image of a fundus of the subject's eye by reflected light from the fundus of the subject's eye is guided to the photographing device by the photographing optical system. An ophthalmologic apparatus comprising an arithmetic control unit for automatically setting the light emission amount of the photographing light source according to the condition set by the photographing condition setting unit, wherein the light emission amount of the photographing light source set by the arithmetic control unit is An ophthalmologic apparatus comprising display means for displaying. 2. The display means is provided so as to be observable through a viewfinder of an observation optical system, and the light emission amount of the photographing light source and other photographing information can be switched and displayed by the arithmetic control means. The ophthalmologic apparatus according to claim 1, wherein the ophthalmologic apparatus is set to. 3. The calculation control means controls the light emission amount displayed on the display means so that the same content is displayed until the photographing condition is changed by the photographing condition setting means. The ophthalmologic apparatus according to 1 or 2. 4. The illumination light from the photographing light source is projected onto the fundus of the eye to be examined through an illumination optical system, and the fundus image of the eye to be examined by the reflected light from the fundus of the eye is guided to the photographing device by the photographing optical system. An ophthalmologic apparatus comprising an arithmetic control unit for automatically setting the light emission amount of the photographing light source according to the condition set by the photographing condition setting unit, wherein the photographing condition setting state set by the photographing condition setting unit is An ophthalmologic apparatus comprising a storage unit for storing.