JP3017243B2 - Ophthalmic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an operation in which a photographed image is displayed as a still image in accordance with an operation related to the next photographing including an operation of a photographing switch. The present invention relates to an ophthalmologic apparatus capable of switching a display state of an image display means to a state in which is displayed.

2. Description of the Related Art Conventionally, an ophthalmologic apparatus such as a fundus camera displays an observation image at the time of fundus observation with a gantry positioned near a subject and performs fundus photographing based on a photographing switch operation. The display state is changed over, and the image display means for displaying the photographed image stored in the image memory as a still image by operating the photographing switch is provided. By confirming the still image displayed on the image display means, In some cases, it is possible to check whether or not the fundus image recorded above is sufficient for a desired image.

(Problems to be Solved by the Invention) However, in this conventional ophthalmologic apparatus, the photographed image as a still image displayed on the image display means is erased after a certain period of time regardless of the examiner's intention, and the image is displayed again. Since the means can be switched to a state in which the observation image can be displayed, there is no time to carefully examine the fundus image captured on the film, which is inconvenient.

Accordingly, it is an object of the present invention to allow time for carefully examining a photographed image recorded on a film and to easily perform a display state switching operation of the image display means at the time of the next photographing. To provide an ophthalmologic apparatus capable of performing the following.

(Means for Solving the Problems) In order to achieve the above object, the invention according to claim 1 of the present invention displays an observation image at the time of observation and displays the image at the time of shooting based on operation of a shooting switch. Image display means for displaying a photographed image stored in the image memory as a still image by switching the state and operating the photographing switch, and detecting means for detecting that the joystick has been operated, and a signal from the detecting means is provided. The display state of the image display means is switched from a state in which the photographed image stored in the image memory is displayed as a still image to a state in which an observation image can be displayed.

According to a second aspect of the present invention, the observation image is displayed at the time of observation, and the display state is switched at the time of photographing based on the operation of the photographing switch, and the display state is stored in the image memory by operating the photographing switch. Image display means for displaying a photographed image as a still image, and detection means for detecting that a photographing switch has been operated, wherein the photographed image stored in the image memory is displayed as a still image by a signal from the detection means. The display state of the image display means is switched from a state in which the observation image is displayed to a state in which the observation image can be displayed.

According to a third aspect of the present invention, the observation image is displayed at the time of observation, and the display state is switched at the time of photographing based on the operation of the photographing switch, and is stored in the image memory by operating the photographing switch. Image display means for displaying a photographed image as a still image; and detection means for detecting that a focusing handle or an alignment operation unit has been operated, and the photographed image stored in the image memory based on a signal from the detection means. The display state of the image display means is switched from a state where is displayed as a still image to a state where an observation image can be displayed.

(Operation) According to the ophthalmologic apparatus according to claim 1 of the present invention, when the joystick is operated, the display state of the image display means is switched by a signal from the detection means, so that the joystick is operated for the next photographing. Then, a signal is output from the detection means, and the image display means automatically switches from a state in which a still image is displayed to a state in which an observation image is displayed. This eliminates the need for a switching operation for switching from a still image to an observation image, and is extremely convenient.

According to the ophthalmologic apparatus according to the second aspect of the present invention, when the photographing switch is operated, the display state of the image display means is switched by a signal from the detecting means, so that the photographing switch must be operated for the next photographing. For example, a signal is output from the detecting means, and the image display means automatically switches from a state of displaying a still image to a state of displaying an observation image. This eliminates the need for a switching operation for switching from a still image to an observation image, and is extremely convenient.

According to the ophthalmologic apparatus according to the third aspect of the present invention, when the focusing handle or the alignment operation unit is operated, the display state of the image display unit is switched by a signal from the detection unit. When the focusing handle or the alignment operation unit is operated, a signal is output from the detection unit, and the image display unit automatically switches from a state in which a still image is displayed to a state in which an observation image is displayed. This eliminates the need for a switching operation for switching from a still image to an observation image, and is extremely convenient.

(Example) In FIG. 2, 100 is a subject, 101 is a base, 102 is a gantry, 103 is an apparatus main body, 104 is a joystick, 105
Is a photographing switch, 106 is a pressure sensor, and the gantry 102 is reciprocated back and forth with respect to the subject by operating the joystick 104 back and forth, and is operated by operating the joystick 104 left and right. The examiner is reciprocated between the left eye position and the right eye position.

As shown in FIG. 3, an optical system constituting a non-mydriatic retinal camera using infrared illumination is incorporated in the apparatus main body 103. In FIG. 3, 1 is a light bulb (halogen lamp) as an observation light source, and 2 is an infrared filter (800n).
The light of wavelength m is transmitted and the light of wavelength less than m is blocked.) 3 is a condenser lens, 4 is a strobe tube (xenon lamp) as a photographing light source, 5 is a ring slit, 6 is a relay lens, Light bulb 1, infrared filter 2, condenser lens 3, strobe tube 4, ring slit 5, relay lens 6
Are arranged in this order on the optical axis 7 and constitute an illumination optical system together with the perforated mirror 8 and the objective lens 9. The electric bulb 1 and the strobe tube 4 are conjugated with respect to the condenser lens 3.

On the optical axis 10 of the objective lens 9, the perforated mirror 8, the imaging lens 12, and the beam splitter
13, a shutter 14, and a film 15 are arranged to form a photographic optical system. The beam splitter 13 has a function of bending the optical path, and the bent optical path 16 has a window lens 17,
Half mirrors 18 are sequentially arranged, and a mirror 19, a monitor lens 20, and an imaging tube 21 (for example, a vidicon for infrared light) are provided on one optical path 16a divided by the half mirror 18.
A monitor lens 22 and an image pickup tube 23 (for example, a white vidicon) are sequentially arranged in the other optical path 16b.
Is input to the monitor television 24 (see FIG. 1) under the conditions described later. Here, the window lens 17, the half mirror 18, the monitor lenses 20 and 22, and the imaging tubes 21 and 23 constitute an observation optical system, and the monitor television 24 displays a monochrome observation image and a color still image.

Here, the beam splitter 13 has a characteristic of reflecting all the infrared light and partially reflecting and partially transmitting the visible light. This beam splitter 13 can be obtained by stacking a coating film of a half mirror and a dichroic mirror. The window lens 17 is an imaging lens
Provided to adjust the exit pupil position of 12, the film 15
Is almost conjugate to

The image pickup tube 21 is connected to a monitor television 24 via a changeover switch 107 as a changeover means as shown in FIG. The photographing switch 105 is input to a latch circuit 108 and a flash synchronizing circuit 109 as switching means. The changeover switch 107 is a switch piece 10
The latch circuit 108 is always reset, and the switch piece 107 'is connected to the fixed contact 107a.

When taking a fundus photograph, turning on the light 1
The light from the electric lamp 1 is subjected to removal of a visible component by an infrared filter 2 to become an infrared light beam. This infrared light flux is once converged by the condenser lens 3 to the position of the strobe tube 4. This light flux becomes an annular light flux by passing through the annular opening 25 of the ring slit 5, and an image of the ring slit 5 is formed near the perforated mirror 8 by the relay lens 6. That is, the ring slit 5 and the perforated mirror 8 are substantially conjugate with respect to the relay lens 6.

The image of the ring slit 5 is projected by the objective lens 9 near the iris 26 of the eye 11 to be inspected. This ring slit 5
The fundus 27 of the subject's eye 11 is illuminated by the light beam that has passed through.

The light reflected by the fundus 27 passes through the lens 28 of the subject's eye 11,
The light is emitted from the cornea 29 as a substantially parallel light beam, and the objective lens 9
To form an image of the fundus oculi 27 in the vicinity of the rear focal point F. This fundus image passes through the aperture 30 of the perforated mirror 8 and forms an imaging lens.
The light is relayed at 12 to form an image near the window lens 17.

This image is further divided by the half mirror 18, and one image is formed on the image receiving surface of the image pickup tube 21 by the monitor lens 20. The other image is formed on the image receiving surface of the image pickup tube 23 by the monitor lens 22. Before operating the shooting switch 105, the fundus image is displayed on the CRT of the monitor TV 24 based on the output signal from the imaging tube 21, and the operator of the camera adjusts the camera while watching the screen, adjusts the fundus image. Observations can be made.

Next, when the photographing switch 105 is operated, the flash tube 4 emits light, and at the same time, the shutter 14 is opened. Further, the switch piece 107 'of the changeover switch 107 is separated from the fixed contact 107a by the latch signal of the latch circuit 108, so that the fixed contact 107
Switch to b side. On the other hand, the luminous flux emitted from the strobe tube 4 illuminates the fundus 27 of the eye 11 to be examined similarly to the luminous flux emitted from the bulb 1, and an image thereof is formed near the rear focal point F of the objective lens 9. This image passes through the aperture 30 of the perforated mirror 8 and forms the imaging lens 12.
And a part of the visible component is beam splitter
An image is formed on the film 15 through the transmission of the fundus 13 and a fundus image is recorded.

The remaining visible and infrared components are split by beam splitter 13
After being reflected by the imaging lens near the window lens 17, the image is further imaged on the image receiving surface of the imaging tube 23 by the monitor lens 22, and the output signal of the imaging tube 23 is output via the flash synchronization circuit 109 as a frame as an image memory. It is input to the memory circuit 110.
Then, the memory for one frame of the fundus image input to the frame memory circuit 110 is output to the monitor TV 24 via the reproduction circuit 111, and the fundus image is displayed on the monitor TV.
It is projected as a still image on 24 CRTs.

Therefore, the quality of the fundus image recorded on the film 15 can be confirmed by confirming the fundus image projected on the monitor television 24.

Here, a joystick 104 for moving the gantry back and forth and right and left is an operation member related to photographing, and a pressure sensor 106 is provided on a side of the joystick 104 as shown in FIG. The pressure sensor 106 is turned on by grasping the joystick 104.

The output of the pressure sensor 106 is input to a latch circuit 108,
The latch circuit 108 is reset by the pressure sensor 106. When the latch circuit 108 is reset, the switch piece 107 'is switched from the fixed contact 107b to the connection side of the fixed contact 107a, so that when the joystick 104 is grasped, the monitor television 24 changes from the state in which the captured image is displayed as a still image. The observation image can be switched to a displayable state. Therefore, since the still image is displayed on the monitor television 24 unless the joystick 104 is grasped, the operator can have enough time for careful examination.

Further, a changeover switch 112 is provided between the changeover switch 107 and the reproduction circuit 111, and the changeover switch 112 is connected to the large-sized and high-precision external monitor television 31, so that a group examination or the like is performed outside the hospital, The photographed image can be examined in more detail later.

Next, FIG. 4 shows a second embodiment of the ophthalmologic apparatus according to the present invention,
This will be described with reference to FIG.

In FIG. 4, reference numeral 32 denotes a pupil alignment correction lens which is provided in a correction lens insertion portion (not shown) so that it can be inserted and removed on the optical axis between the objective lens 9 and the perforated mirror 8. A switch (see reference numeral 32 'in FIG. 2) that is turned on when the correction lens 32 is inserted and turned off when the correction lens 32 is inserted and removed is provided so that the monitor television 24 can display the photographed image as a still image. In this second embodiment, the insertion of the correction lens 32 is an operation related to photographing.

Although the first and second embodiments have been described above, the present invention is not limited to this. Examples of operations related to photographing include focusing with a focusing handle, alignment operation for observation, and observation of the anterior eye part. For example, the observation of the fundus may be considered, and the switching unit may be operated in conjunction with the operation related to the photographing.

Next, a third embodiment of the ophthalmologic apparatus according to the present invention will be described with reference to FIG.

The ophthalmologic apparatus according to the third embodiment includes a photographing switch 105
By operating itself, the display state of the image display means can be switched from a state in which the captured image stored in the image memory is displayed as a still image to a state in which an observation image can be displayed, In FIG. 6, the same circuit components as those shown in FIG. 1 are denoted by the same reference numerals.

In the third embodiment, a strobe light emission inhibition circuit 113 is provided in front of a strobe synchronization circuit 109 instead of the pressure sensor 106. A signal from the photographing switch 105 is input to the strobe light emission prohibition circuit 113 and the latch circuit 108, and the latch circuit 108 is always reset as in the first embodiment. The flash emission inhibiting circuit 113 is provided when the latch circuit 108 is in the reset state and the photographing switch 1
When 05 is operated, light emission of the strobe tube 4 is permitted.

Therefore, when the photographing switch 105 is operated for photographing the fundus, the latch circuit 108 is in a reset state.
The light emission prohibition circuit 113 permits strobe light emission, and the strobe tube 4 emits light. The latch circuit 108 outputs a latch signal to the light emission inhibition circuit 113 and the changeover switch 107.
As a result, the changeover switch 107 is switched to the fixed contact 107b side, and the fundus image is displayed on the CRT of the monitor television 24 as a still image. Also, the light emission inhibition circuit
When the latch signal is input, the flash unit 113 disables light emission of the flash tube 4.

Here, when the photographing switch 105 is operated again, the latch circuit 108 is reset. Then, the changeover switch 107 is switched to the side of the fixed contact 107a, and the monitor television 24 changes from a state in which the captured image is displayed as a still image to a state in which an observation image can be displayed. When the photographing switch 105 is operated again, the light emission prohibition circuit 113 is in the light emission prohibition state by the latch signal of the latch circuit 108, so that the flash tube 4 does not emit light. That is, when the photographing switch 105 is operated again while the photographing switch 105 is pressed to display a still image on the monitor television 24, only the observation image can be displayed, and the flash tube 4 does not emit light.

(Effect) According to the ophthalmologic apparatus according to the first aspect of the present invention, the joystick is operated and the image is kept as it is from the time when the photographing is performed until the time when it is necessary to shift to the next photographing. Since the image is displayed on the display means, it is convenient because it is possible to have a time margin for carefully examining the photographed image photographed on the film.

When the joystick is operated for the next photographing, a signal is output from the detecting means, and the image display means automatically switches from a state in which a still image is displayed to a state in which an observation image is displayed. This eliminates the need for a switching operation for switching from a still image to an observation image, and is extremely convenient.

According to the ophthalmologic apparatus according to the second aspect of the present invention, the image display means remains in a state in which the photographed image remains as it is from the time when the photographing switch is operated to the time when it is necessary to shift to the next photographing. Is displayed, so that it is convenient to have time to carefully consider the photographed image photographed on the film.

Further, when the photographing switch is operated for the next photographing, a signal is output from the detecting means, and the state is automatically switched from the state where the image display means displays a still image to the state where the observation image is displayed. This eliminates the need for a switching operation for switching from a still image to an observation image, and is extremely convenient.

According to the ophthalmologic apparatus according to the third aspect of the present invention, the photographed image is kept as it is from the time when it is necessary to operate the focusing handle or the alignment operation unit to the time when it is necessary to shift to the next photographing. Since the image is displayed on the image display means in a state, it is convenient because the photographed image photographed on the film can be carefully examined.

Also, if the focusing handle or the alignment operation unit is operated for the next shooting, a signal is output from the detection means and the image display means automatically changes from a state where a still image is displayed to a state where an observation image is displayed. Switch. For this reason,
A switching operation for switching from a still image to an observation image is not required, and the usability is extremely high.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a main part of an ophthalmologic apparatus according to the present invention, FIG. 2 is a schematic diagram showing an entire configuration of the ophthalmic apparatus according to the present invention, and FIG. 3 is a schematic configuration of an optical system of the ophthalmologic apparatus according to the present invention. FIG. 4, FIG. 4 and FIG. 5 are schematic configuration diagrams of an optical system of a pupil position correcting lens of the ophthalmologic apparatus according to the present invention. FIG. 6 is a circuit diagram of a main part of the ophthalmologic apparatus according to the third embodiment of the present invention. It is. 24, 31 monitor television (image display means) 105 photographing switch 106 pressure sensor (switching means) 107 switch (switching means) 108 latch circuit (switching means) 109 strobe synchronization circuit (Switching means) 110: Frame memory (image memory) 113: Light emission inhibition circuit

Claims (3)

(57) [Claims] 1. An observation image is displayed at the time of observation, and a display state is switched at the time of photographing based on operation of a photographing switch, and a photographed image stored in an image memory is operated as a still image by operating the photographing switch. Image display means for displaying, and detection means for detecting that a joystick has been operated, and an observation image from a state in which the photographed image stored in the image memory is displayed as a still image by a signal from the detection means. An ophthalmologic apparatus, wherein the display state of the image display means is switched to a state in which the image can be displayed. 2. An observation image is displayed at the time of observation, and a display state is switched at the time of photographing based on operation of a photographing switch, and a photographed image stored in an image memory is operated as a still image by operating the photographing switch. Image display means for displaying, and detecting means for detecting that a photographing switch has been operated, and observing the photographed image stored in the image memory as a still image by a signal from the detecting means. An ophthalmologic apparatus, wherein a display state of the image display means is switched to a state in which an image can be displayed. 3. The observation image is displayed at the time of observation, and the display state is switched at the time of photographing based on the operation of the photographing switch, and the photographed image stored in the image memory is operated as a still image by operating the photographing switch. Image display means for displaying, and detection means for detecting that the focusing handle or the alignment operation section has been operated, and the photographed image stored in the image memory is displayed as a still image by a signal from the detection means. An ophthalmologic apparatus, wherein the display state of the image display means is switched from a state in which the observation image is displayed to a state in which the observation image can be displayed.