JPH02147045A - Ophthalmologic device - Google Patents

Abstract

PURPOSE:To automatically switch a fixed target light to a color, which can be easily visually confirmed by a patient, in correspondence to a photographic mode by receiving an output signal from an illuminating light detecting means, selecting and changing the color of the fixed target light automatically to the color which is different from the color of an illuminating light. CONSTITUTION:At the time of infrared fluorescent photographing, according to the selection of the infrared fluorescent photographic mode, the operation of an exciter filter device driving part 15 is automatically controlled by a CPU 46 and a filter 14 for infrared fluorescent exciting of an exciter filter device 12 is inserted to an optical path 0. When the filter 14 for infrared fluorescent exciting is inserted to the optical path 0, the microswitch 47 of a sensor 16 as the illuminating light detecting means is turned on and a turning-on signal is inputted to the CPU 46. The CPU 46 controls the operation of a color filter device driving part 36 and the green filter 35 of a color filter device 33 is inserted to the optical path of an external fixed target system. Then, a light emitting part 32 is emitted in green. When the photographic mode is set to a visible fluorescent observation photographic mode, a filter 13 for visible fluorescent exciting is inserted to the optical path 0 and simultaneously, the operation of the color filter driving device 36 is controlled. Then, the red filter 34 of the color filter device 33 is inserted to the optical path of the external fixed target system and the light emitting part 32 is emitted in red.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an ophthalmological apparatus having a fixation target light for visual line guidance.

[Prior Art] As this type of ophthalmological apparatus, for example, a fundus camera and a slit lamp are known. With this fundus camera, when observing and photographing a patient's eye, the examiner can change the color of the fixation target light, such as red or green, to guide the patient's line of sight in the direction desired by the examiner. is selected and made visible to the patient's eye.

For observation and photography of the eye to be examined using a fundus camera, there are various photography modes depending on the purpose: general observation photography, fluorescence observation photography, and infrared fluorescence observation photography, and these days, each of these photography modes can be selected on the spot. It is known that the camera is integrated into a single fundus camera. In this case, since the color of the illumination light to the subject's eye differs depending on each imaging mode, solid index light of a color suitable for each imaging mode is obtained by using filters of multiple colors.

By the way, during infrared fluorescence observation photography, the illumination light is wavelength-selected by an infrared fluorescence exciter filter and irradiated to the fundus, but the illumination light is not completely infrared light but also includes some red visible light. The subject feels a red light. Further, during visible fluorescence imaging, illumination is performed with blue visible light through an exciter filter for visible fluorescence, and during general imaging, illumination is performed with white visible light.

Therefore, if the color of the solid index light is a color other than red during infrared fluorescence observation photography and a color other than blue during visible fluorescence observation photography, there is no risk of confusion. Since the illumination light is white, there will be no confusion if the fixation target light is any color other than white, but red is generally the most visible color to the human eye, so it is desirable to use red.

Furthermore, it is desirable that the color of the fixation target light be in a complementary color relationship with that of the illumination light for observation and photographing.

For this reason, red and green light emitting diodes are provided so that fixation target light of a desired color can be obtained, and the examiner switches the color to a color that is easier for the patient to be examined depending on the imaging mode.

[Problems to be Solved by the Invention] However, in conventional ophthalmological devices, the examiner manually switches the fixation target light each time the color of the illumination light changes due to a change in the observation/photography mode. There must be. Therefore, for example, if you forget to switch the fixation target light to red and perform infrared fluorescence photography, the patient may confuse the color of the illumination light with the color of the fixation target light, causing the patient's line of sight to be distracted. There were times when I was unable to induce it.

This invention was made in view of the above problems,
The purpose is to provide an ophthalmological apparatus that automatically switches the fixation target light to a color that is easily visible to the patient depending on the imaging mode.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an ophthalmological apparatus equipped with fixation target lights of a plurality of colors for fixating the eye to be examined. illumination light detection means for detecting a selection change of the illumination light detection means; and a fixation target for automatically selecting and changing the color of the fixation target light to a color different from the color of the illumination light in response to an output signal from the illumination light detection means. It is characterized by having a light changing means. Further, in an ophthalmological apparatus equipped with fixation target lights of a plurality of colors for fixating an eye to be examined, an illumination light detection means for detecting a change in selection of the illumination light irradiating the eye to be examined; fixation target light changing means for receiving an output signal from the illumination light detection means and automatically selecting and changing the color of the fixation target light so that the color is complementary to the illumination light when the color is other than white; This is a characteristic feature.

[Operations] The ophthalmological equipment configured as above allows fixation target light of the optimal color to correspond to the selection of the imaging mode in each imaging mode such as general observation imaging, fluorescence imaging, and infrared fluorescence imaging. Automatically selected in conjunction with the shooting mode selection.

[Example] The present invention will be explained below based on the drawings.

In FIG. 1, an illumination system and an observation and photographing system are provided inside the main body (not shown) of the fundus camera, and an external fixation target system is provided outside the main body. The illumination system has an observation illumination optical system and a photographic illumination optical system, and the observation photographic system has a photographic optical system and an observation optical system.

The observation illumination optical system includes optical members such as an observation illumination light source 1, condenser lenses 2 and 3, a ring slit 4, a relay lens 5, a reflection mirror 6, a relay lens 7, a perforated mirror 8, and an objective lens 9. The illumination light from the observation illumination light source 1 passes through the condenser lens 23, ring slit 4, relay lens 5, reflection mirror 6, relay lens 7, perforated mirror 8, and objective lens 9 to the fundus of the eye E to be examined.
It is projected onto f.

The photographic illumination optical system includes a photographic illumination light source 1° such as a xenon lamp disposed between condenser lenses 2 and 3, and optical members from the condenser lens 3 to the objective lens 9 used in the observation illumination optical system. .

The photographic illumination light from the photographic illumination light source 10 is projected onto the fundus Ef via optical members from the condenser lens 3 to the objective lens 9. Note that 11 is a through hole in the center of the perforated mirror 8.

An exciter filter device 12 is removably provided between the relay lens 5 and the reflection mirror 6 of such an illumination system. This exciter filter device 12 includes a visible fluorescence excitation filter 13 and an infrared fluorescence excitation filter 14.
The exciter filter drive unit 15 drives the exciter filter drive unit 15 so that one of them can be used selectively. Further, the exciter filter 12 is provided with a sensor 16.

The photographing optical system includes optical members such as an objective lens 9, a perforated mirror 8, a focusing lens 17, and an imaging lens 18. Then, the reflected light or fluorescence from the fundus g+ is transmitted through an objective lens 9,
It is guided to a film surface 19 via a perforated mirror 8, a focusing lens 17, an imaging lens 18, and the like.

The observation optical system includes optical members from the objective lens 9 to the imaging lens 18, a quick return mirror removably installed between the imaging lens 18 and the film surface 19, a field lens 21, and a relay lens 22. It is equipped with optical members such as. By disposing the quick return mirror 20 between the imaging lens 18 and the film surface 19, the reflected light or fluorescence from the fundus Ef is removed from the optical members from the objective lens 9 to the imaging lens 18, and the quick return mirror 20, field lens 21 and relay lens 22
The user is guided to a TV camera 23 and a monitor TV 24 via the TV camera 23 and monitor TV 24.

Furthermore, a barrier filter device 25 is removably installed between the perforated mirror 8 and the focusing lens 17 of the observation photographing system. A visible fluorescence excitation filter 26 and an infrared fluorescence excitation filter 27 are attached to this barrier filter device 25, and are driven by a barrier filter device drive unit 28 such as a solenoid or a motor, so that either can be selectively used. That's how it is.

The external fixation target system has optical members such as a fixation target white light source hole, a condenser lens, and an optical fiber 31. By arranging the light emitting part 32 at the tip of the optical fiber 31 between the objective lens 9 and the eye E, the illumination light from the fixation target white light source 29 is transmitted through the condenser lens (equipment), the optical fiber 31, It is guided to the eye E through the light emitting section 32. Further, a color filter device f133 is detachably provided between the condenser lens 30 of the external fixation target system and the optical fiber 31. This color filter v device 33 has, for example, a red filter 34 and a green filter 35, and a color filter device drive unit 36 such as a solenoid or a motor.
This allows one to be used selectively.

These exciter filter device drive section 15, barrier filter device drive section 28, and color filter device drive section 36 are as follows:
Each is connected to the output side of a CPU (central processing unit) 46, and the sensor 16 provided in the exciter filter device 12 and a mode selection means A for selecting a shooting mode are connected to the input side of the CPO 46. The signals from the selection means A and the sensor 16 cause each drive section 15 on the output side. 28. 36 are simultaneously controlled in conjunction with each other under the conditions described below. The mode selection means A is capable of selecting any one of the photographing modes such as general fundus observation photography, visible fluorescence observation photography, and infrared fluorescence observation photography.

Further, the CPt 146 controls the operation of the exciter filter device drive section 15 and the barrier filter device drive section 28 in the following relationship. That is, when the visible fluorescence imaging mode is selected by the mode selection means A and the visible fluorescence excitation filter 13 of the exciter filter device 12 is inserted into the optical path by the exciter filter device drive unit 15, the CPt 146 selects the barrier filter device. The visible fluorescence excitation filter 26 of the barrier filter device 25 is driven by the drive unit 28.
is inserted into the observation/photographing optical path and controlled by IIJ. On the other hand, when the infrared fluorescence imaging mode is selected by the mode selection means A and the infrared fluorescence excitation filter 14 of the exciter filter device W12 is inserted into the optical path by the exciter filter device drive unit 15, the CPO 46 The barrier filter device 2 is driven by the filter device drive unit 28.
The infrared fluorescence excitation filter 27 of No. 5 is inserted and controlled into the observation and photographing optical path.

The above-mentioned sensor 16 detects whether or not the exciter filter device 12 is inserted into the optical path 0, and further detects whether it is the visible fluorescence excitation filter 13 or the infrared fluorescence excitation filter 14 that is inserted. It is something. In this embodiment, as a detection method using the sensor 16, a microswitch method is used in which detection is performed from the contact position of a contact point.

Figure 2 shows an example of the micro switch system. For example, on the fan-shaped substrate 12a of the exciter filter device 12,
A red visible fluorescence excitation filter 13 and a green infrared fluorescence excitation filter 14 are provided along the outer edge of the substrate surface, and a convex portion 12b is formed on the outer periphery of the substrate 12a.

On the other hand, a microswitch 47. 48 are provided. The exciter filter device 12 can be rotated left and right by a rotation shaft 12c attached near the apex angle corresponding to the outer periphery, and has a visible fluorescence excitation filter 13 or an infrared fluorescence excitation filter 14 on the optical path 0. can be placed. Therefore, when this exciter filter device 12 rotates and the infrared fluorescence excitation filter 14 is placed in the optical path 0, the convex portion 12
b turns on the micro switch 47
The ON signal from 7 is input to CPIJ46. Then, the exciter filter device 12 further rotates and the convex portion 12
b moves to turn off the microswitch 47 and place the infrared fluorescence excitation filter 13 in the optical path O. When the convex portion 12b turns on the microswitch 48, the ON signal from the microswitch 48 reaches the peak 1146. is input. In this embodiment, the CPO 46 and the color filter device driving section 36 constitute a fixation culm changing means.

Further, the CPU 46 controls the selection of the color of the fixation target light in accordance with the observation photographing mode selected by the mode selection means A as follows.

That is, the fundus Ef of the eye E to be examined is determined using the optical system described above.
When photographing, first, the mode selection means A changes the color of the external fixation target light according to each photographing mode such as general fundus observation photography, fluorescence observation photography, and infrared fluorescence photography.

For example, during infrared fluorescence photography, the CPU 46 automatically controls the operation of the exciter filter device drive unit 15 by selecting the infrared fluorescence photography mode, so that the infrared fluorescence excitation filter 14 of the exciter filter device 12 is placed in the optical path 0. inserted. When the infrared fluorescence excitation filter 14 is inserted into the optical path O, the microswitch 47 of the sensor 16, which is the illumination light detection means, is turned on as described above.
A signal is input to CPU 46. Upon receiving this output signal, the CPU 46 controls the operation of the color filter insertion drive section 36 to insert the green filter 35 of the color filter device 33 into the optical path of the external fixation target system, causing the light emitting section 32 to emit green light. let In this way, during infrared fluorescence photography where the illumination light is red, the illumination light is the complementary color green, making it easier to see.

Similarly, the mode selection means A selects the photographing mode for general observation 4.
When the +1 shadow mode is set, the CPIJ 46 controls the operation of the filter device drive section 15 to remove the exciter filter device 12 from the optical path 0. As a result, the CPU 46 controls the color filter device driving section 36 to operate the color filter device 33.
A red filter 34 is inserted into the optical path of the external fixation target system, and the light emitting section 32 emits red light. In this way, the color of the fixation target light is automatically selected and changed to a color different from the color of the illumination light.

Further, when the mode selection means A sets the photographing mode to the visible fluorescence observation photographing mode, the CPO 46 controls the operation of the filter pouch drive unit 15 to insert the visible fluorescence excitation filter 13 of the exciter filter device 12 into the optical path 0. At the same time, the CPO 46 controls the operation of the color filter device driving section 36 so that the red filter 34 of the color filter device 33
is inserted into the optical path of the external fixation target system, and the light emitting section 32 is caused to emit red light. In this way, the color of the fixation target light is selectively changed to a color different from the color of the illumination light.

Although the microswitch method has been described as a sensor, it is not necessarily limited to this; a photoelectric conversion method using light as a medium, a proximity switch method using magnetism, a potentiometer method using rotation angle, etc. can be used as a sensor. can also be considered.

Further, as shown in FIG. 3, the fixation target may be provided externally or may be an internal fixation target provided inside the fundus camera. The internal fixation target system includes a fixation target white light source 37, a fixation target,
It has optical members such as a relay lens area and reflection mirrors 4o and 41. By disposing the reflecting mirror 41 between the perforated mirror 8 and the focusing lens 17, the illumination light from the fixation target white light fi 37 can be applied to the fixation target, the relay lens zone, and the reflecting mirror 40. ．． 41, the image is projected onto the eye E through the perforated mirror 8 and the objective lens 9. Moreover, between the relay lens 39 of the internal fixation target system and the reflection mirror 40,
A color filter device 42 is removably provided. This color filter device 42 has, for example, a red filter 43 and a green filter 44, and a color filter device drive section 45.
This allows one to be used selectively.

If an internal fixation target is provided instead of an external fixation target,
The CPU 46 controls the operation of the color filter device driving section 45, and the selection of the fixation target light by the green filter and the red filter of the color filter device 42 is performed in the same manner as the fixation selection in the above embodiment. In addition, these external fixation targets,
The combined use of internal fixation targets is also possible. Although a white light source is used as the fixation target light, light emitting diodes of a plurality of colors may be used and selectively turned on.

The colors of the plurality of filters provided in each color filter device 42 of the external fixation target system and the internal fixation target system are colors that are complementary to the illumination light of each photographing mode.

In the above embodiment, the visible fluorescence excitation filter 13 and the infrared fluorescence excitation filter 14 of the exciter filter device 12 are automatically inserted into and removed from the optical path 0 by selecting the photographing mode. r11
It is also possible to adopt a configuration in which the twelve visible fluorescence excitation filters 13 and the infrared fluorescence excitation filters 14 can be manually inserted into the optical path 0. In this case, by keeping the other configurations the same as in the above embodiment, the exciter filter device
Even if 2 is selected, the color of the same right culm is automatically set.

In this way, the fixation target light is automatically switched to a color that is easy for the patient to see (for example, a color that is complementary to the illumination light) according to the imaging mode, which helps guide the eye. easily possible.

[Effects] As described above, the 11th medical device of the present invention is an ophthalmological device equipped with fixation lights of multiple colors for fixating the eye to be examined, and in which the illumination light irradiating the eye to be examined is illumination light detection means for detecting a selection change; and a fixation culm for automatically selecting and changing the color of the fixation target light to a color different from the color of the illumination light in response to an output signal from the illumination light detection means. It is characterized by having a changing means. Further, in an ophthalmological apparatus equipped with fixation target lights of a plurality of colors for fixating an eye to be examined, an illumination light detection means for detecting a change in selection of the illumination light irradiating the eye to be examined; fixation target light changing means for receiving an output signal from the illumination light detection means and automatically selecting and changing the color of the fixation target light so that the color is complementary to the illumination light when the color is other than white; This is a characteristic feature. As a result, it becomes possible to easily guide the subject's line of sight using the fixation target light.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the relationship between the optical system and the control circuit of the fundus camera according to the present invention, Fig. 2 is an explanatory diagram showing an example of a microswitch system, and Fig. 3 is an explanatory diagram showing an internal fixation target system. It is a diagram. 12... Exciter filter device 13... Visible fluorescence excitation filter 14... Infrared fluorescence excitation filter 15... Exciter filter device drive section 16... Sensor (illumination light detection means) 32... Light emitting unit 33...Color filter device 34...Red filter 35...Green filter 36...Color filter device drive unit 46...CPU E...Eye to be examined

Claims (2)

[Claims] (1) In an ophthalmological apparatus equipped with fixation target lights of multiple colors for fixating the eye to be examined, the illumination light detection means detects a change in selection of the illumination light that illuminates the eye to be examined, and the illumination light detection means An ophthalmological apparatus comprising: a fixation target light changing means for automatically selecting and changing the color of the fixation target light to a color different from the color of the illumination light in response to an output signal from the ophthalmologic apparatus. (2) An ophthalmological apparatus equipped with fixation target lights of multiple colors for fixating the eye to be examined, comprising an illumination light detection means for detecting a change in selection of the illumination light that illuminates the eye to be examined, and a color of the illumination light. fixation target light changing means for receiving an output signal from the illumination light detection means and automatically selecting and changing the color of the fixation target light so that the color is complementary to the illumination light when the color is other than white; An ophthalmological device featuring: