JP2002253505A - Ophthalmologic device provided with laser beam source - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmologic device capable of confirming that there is no nonconformity in a device by proper inspection before starting work prior to use. SOLUTION: This device is provided with a controller 54 and a timer 57 to time. The controller 54 reads a specified time, and a time counted by the timer 57 when it is possible to radiate a laser beam for the next time, and it compares it with the specified time. When it is determined that the result of comparison satisfies set conditions preliminarily set in the controller 54, inspection before starting work is conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus having a laser light source for inspecting, photographing, or operating an eye to be examined by, for example, irradiating a laser beam.

[0002]

2. Description of the Related Art Various ophthalmic devices using laser light are known. For example, when a fundus image is obtained by scanning a laser beam on the fundus, or when a fundus camera performs ICG imaging, an exciter filter is inserted into an illumination optical system to transmit only a desired wavelength range of halogen light. Instead of illuminating the fundus, ICGs use the fact that laser light has a single wavelength.
A device for observing and photographing using as a light source has been developed. In addition, a laser treatment device that coagulates new blood vessels using laser light for the treatment of retinal detachment, macular degeneration, and the like has also become common.

Further, a fundus blood flow meter for measuring a blood flow velocity in a fundus blood vessel or a capillary vessel using coherence of a laser for refractive surgery or laser light has been developed.

[0004]

However, in the above-mentioned conventional example, although the laser beam has various features, it has a high energy density, so that malfunction of the apparatus and unnecessary light are applied to the subject's eye for a long time. Attention must be paid to irradiation. Therefore, in the case of a laser device for photocoagulation, for example, the operation of the device is monitored, and an emergency stop switch is provided to immediately stop the entire device if any problem occurs.

[0005] Alternatively, as described in Japanese Patent Publication No. 11252/1990, the presence or absence of a protection filter inserted into an optical path for protecting an examiner's eye is determined only by mechanical detection such as a microswitch. Optically, specifically, to detect the presence or absence of a protection filter, both the detection light flux transmitted through the protection filter and the detection light flux not transmitted through the protection filter are detected, and the output signal thereof is preset. A self-diagnosis function is provided to ensure safety by comparing with a predetermined value, and the operation of the apparatus is automatically stopped when an abnormality occurs. Further, there is also known an apparatus configured to notify an inspector of a problem location when a problem occurs.

Further, as disclosed in Japanese Patent Application Laid-Open No. Hei 7-11678, a light-shielding member is provided so that reflected light does not enter the operator's eyes when adjusting the optical axis of the laser light in the inspection before starting work. There is also known an example in which a protection circuit is provided to prevent the laser from oscillating when it is not mounted.

However, it is not always necessary to check the operation every time before using the apparatus, and it is sufficient to perform the check periodically. However, in these apparatuses, the operation is not checked in advance before using the apparatus. This is a measure to be taken in the event that monitoring is only performed or a problem occurs during operation. Therefore, if there is a problem in the operation range of the apparatus even if there is no problem in the light amount, the operation failure cannot be found until the patient is actually inspected and the treatment is started. It may happen that testing and treatment for the patient must be interrupted. In addition, since the irradiation amount of the laser beam is not controlled for each eye of the subject, there is a problem that the laser beam is accidentally irradiated on the retina.

At the time of the inspection before the start of operation, this is a protection function for the operator to perform work, and does not necessarily confirm the operation of the apparatus. In addition, the apparatus itself is not naturally configured to perform the pre-operation inspection.

A main object of the present invention is to improve the above-mentioned prior art, and one of the specific objects is to perform a pre-operation check when the time measured by the timer has changed significantly from the last use. The present invention is to provide an ophthalmologic apparatus provided with a laser light source capable of grasping the problem in advance when a problem occurs in the apparatus.

Another object of the present invention is to perform a pre-operation check when it is determined that the time measured by the timer satisfies the setting conditions set in the controller in advance. It is an object of the present invention to provide an ophthalmologic apparatus provided with a laser light source capable of grasping a problem in advance in the case where a problem has occurred.

Another object of the present invention is to allow the start of the lapse of the predetermined time to be the time of the previous use by using the memory for storing the predetermined time, and to set the condition for executing the pre-use check to be the lapse of time from the previous time. To provide an ophthalmologic apparatus provided with a laser light source capable of performing such operations.

Another object of the present invention is to provide a laser light source which, when the measurement mode is selected, makes it possible to more accurately time the time required to determine whether or not to enter the pre-operation inspection. Ophthalmic apparatus provided with the same.

Another object of the present invention is to provide an ophthalmologic apparatus equipped with a laser light source, which eliminates the trouble of starting a pre-operation check every time a measurement is performed by comparing the times measured by a timer. It is in.

Another object of the present invention is to compare the time measured by a timer, so that an opthalmologic apparatus provided with a laser light source that does not require frequent pre-operation inspections when the operation of the apparatus is stable. Is to provide.

Another object of the present invention is to provide an ophthalmologic apparatus having a laser light source which can be set to perform a pre-operation check when a use interval is widened by comparing times measured by a timer. It is in.

Another object of the present invention is to determine whether or not the shape of the laser beam applied to the reflection plate is smaller than an allowable value, so that the measurement beam cannot be properly applied to the portion to be measured and the measurement cannot be performed correctly. It is an object of the present invention to provide an ophthalmologic apparatus provided with a laser light source capable of avoiding the problem that the tracking accuracy is reduced and the problem that the tracking accuracy is reduced.

Another object of the present invention is to reduce the tracking accuracy and the measurement accuracy by determining whether or not the illumination unevenness of the laser light applied to the reflector is below an allowable value. An object of the present invention is to provide an ophthalmologic apparatus having a laser light source that can be avoided.

Another object of the present invention is to check the movable range by deflecting the laser beam on the reflector, so that the laser beam cannot be moved to a desired portion of the fundus and the examination cannot be performed. An object of the present invention is to provide an ophthalmologic apparatus provided with a laser light source capable of eliminating a defect.

Another object of the present invention is to provide an ophthalmologic apparatus provided with a laser light source capable of detecting a defect in advance by judging the presence or absence of a laser beam applied to a reflector.

Another object of the present invention is to provide an ophthalmologic apparatus equipped with a laser light source that can concentrate on examination and treatment by calculating the ratio between the irradiation energy value and the maximum allowable laser energy and displaying the result. To provide.

Another object of the present invention is to display the information on the inspection items to be executed at the time of the inspection before the start of operation on the first display device, so that the inspection items and their contents can be understood and the convenience and reliability can be improved. An object of the present invention is to provide an ophthalmologic apparatus provided with a laser light source.

Another object of the present invention is to provide an ophthalmologic apparatus having a laser light source capable of confirming the shape of a laser beam based on whether the shape of the laser beam is within an allowable value stored in a controller. To provide.

Another object of the present invention is to provide an ophthalmologic apparatus having a laser light source for confirming illumination unevenness based on whether or not illumination unevenness of a laser beam is within an allowable value stored in a controller. is there.

Another object of the present invention is to provide a laser light source for deflecting a laser beam to the maximum and confirming a movable range of the laser beam by comparing with a predetermined value stored in an emission angle at that time. An ophthalmic apparatus is provided.

Another object of the present invention is to confirm the operation of the laser shutter by judging whether or not the output signal of the optical image pickup device has changed due to the laser light when the laser shutter is retracted from the optical path. An object of the present invention is to provide an ophthalmologic apparatus provided with a laser light source.

Another object of the present invention is to irradiate a laser beam unnecessarily to a subject by irradiating a laser beam and confirming that a result calculated by an arithmetic unit is correctly displayed on a display. An object of the present invention is to provide an ophthalmologic apparatus having a laser light source that does not have to worry.

Another object of the present invention is to provide an ophthalmologic apparatus having a laser light source capable of stopping the pre-operation inspection even when it is determined that the pre-operation inspection is to be performed.

Another object of the present invention is to provide an ophthalmologic apparatus having a laser light source for performing a pre-operation check every time the laser beam irradiation becomes possible when the service life has passed and the possibility of occurrence of a problem has increased. Is to do.

Still other objects of the present invention will become clear in the embodiments described later.

[0030]

According to a first aspect of the present invention, there is provided an ophthalmologic apparatus which has a laser light source and irradiates a laser beam to an eye to be inspected. The controller has a timer for measuring the time, the controller reads the time of the timer when the power is turned on, and before starting when the date or month has changed from the last use or when a predetermined period has elapsed. An ophthalmologic apparatus that performs an inspection.

According to a second aspect of the present invention, there is provided an ophthalmologic apparatus having a laser light source and irradiating a laser beam to an eye to be inspected, comprising a controller and a timer which keeps measuring time even when the power is turned off. When the laser beam can be irradiated, read the time of the timer,
An ophthalmologic apparatus which performs comparison with a predetermined time, and enables pre-operation inspection when it is determined that the comparison result satisfies a setting condition set in advance in the controller.

According to a third aspect of the present invention, the predetermined time is a time at which the laser beam is released from being radiated.
The ophthalmologic apparatus according to claim 2, further comprising a memory for storing the predetermined time.

According to a fourth aspect of the present invention, there is provided a mode selector for selecting a measurement mode for irradiating the eye to be examined with a laser beam to acquire a signal beam and an analysis mode for analyzing the signal beam. The ophthalmologic apparatus according to claim 2, wherein the state in which laser light irradiation is possible is a state in which a measurement mode is selected by the mode selector.

According to a fifth aspect of the present invention, the setting condition set in the controller is such that the predetermined time is compared with the time measured by the timer when the laser beam can be irradiated next time. The ophthalmologic apparatus according to claim 2, wherein the dates are different.

According to a sixth aspect of the present invention, the set condition set in the controller is such that the predetermined time is compared with the time measured by the timer when the laser beam irradiation becomes possible next time. The ophthalmologic apparatus according to claim 2, wherein the months are different.

According to a seventh aspect of the present invention, the setting condition set in the controller is such that the predetermined time is compared with a time measured by the timer when the next laser beam irradiation becomes possible. The ophthalmologic apparatus according to claim 1, wherein the time exceeds a predetermined time.

According to an eighth aspect of the present invention, in the pre-operation inspection, a reflector is disposed at a laser beam imaging position on the front surface of the objective optical system, and a laser beam is irradiated. The ophthalmologic apparatus according to claim 1, wherein it is determined whether the shape is equal to or smaller than an allowable value.

According to a ninth aspect of the present invention, in the inspection before starting, a laser beam is irradiated by arranging a reflector at a laser beam imaging position in front of the objective optical system, and the laser beam radiated on the reflector is provided. The ophthalmologic apparatus according to claim 1, wherein it is determined whether the illumination unevenness is equal to or less than an allowable value.

According to a tenth aspect of the present invention, in the pre-operation inspection, a reflector is disposed at a laser beam imaging position on the front surface of the objective optical system, a laser beam is irradiated, and the laser beam is deflected to deflect the laser beam. The ophthalmologic apparatus according to claim 1, wherein the movable range is confirmed.

According to an eleventh aspect of the present invention, in the pre-operation inspection, a reflector is disposed at a laser beam imaging position on the front surface of the objective optical system, and the opening and closing operation of a laser shutter provided in the irradiation optical system is performed. 2. The method according to claim 1, wherein the determination is made based on the presence or absence of a laser beam applied to the reflector.
Or the ophthalmologic apparatus according to 2.

According to a twelfth aspect of the present invention, in the pre-operation inspection, the irradiation energy is calculated from the irradiation time and output of the laser beam, and the ratio of the irradiation energy value to the maximum allowable laser energy is calculated. The ophthalmologic apparatus according to claim 1, wherein a result is displayed.

According to a thirteenth aspect of the present invention, a first indicator is provided, and when the controller determines that the pre-operation inspection is to be performed, the controller displays information on the inspection items to be executed at the time of the pre-operation inspection. The ophthalmologic apparatus according to any one of claims 1 to 12, wherein the ophthalmologic apparatus is displayed on a display device.

According to a fourteenth aspect of the present invention, there is provided a reflector driver for disposing a reflector at a laser beam imaging position on the front surface of an objective optical system, and substantially conjugate with the reflector arrangement position provided in a reflected light receiving optical system. An imager arranged at a position, a shutter driver for driving a laser shutter, and when the controller determines that the pre-operation inspection is to be performed, the controller drives the reflector driver to dispose the reflector and the shutter By irradiating the laser light by driving the driver, depending on whether the shape of the laser light is within the allowable value stored in the controller by the output signal of the imager that captured the laser light,
The ophthalmologic apparatus according to any one of claims 1, 2 and 8, wherein the control is performed so as to confirm the shape of the laser light.

According to a fifteenth aspect of the present invention, there is provided a reflector driver for disposing a reflector at a laser beam imaging position on the front surface of an objective optical system, provided in a reflected light receiving optical system and substantially conjugate with the reflector arrangement position. An imager, a shutter driver for driving a laser shutter, and when the controller determines that the pre-operation inspection is to be performed, the controller drives the reflector driver to dispose the reflector, and drives the shutter. Irradiation of laser light by driving the device, the confirmation of illumination unevenness by whether or not the illumination unevenness of the laser light is within an allowable value stored in the controller by the output signal of the imager imaging the laser light. The ophthalmologic apparatus according to any one of claims 1, 2, and 9, wherein the apparatus is controlled to perform the operation.

According to a sixteenth aspect of the present invention, there is provided a reflector driver for arranging a reflector at a laser beam image forming position on the front surface of an objective optical system, a shutter driver for driving a laser shutter, and a deflection device for deflecting a laser beam to be irradiated. Device, an emission angle detector for detecting an emission angle of the deflector to the eye to be inspected, and when the controller determines that the pre-operation inspection is to be performed, the controller drives the reflector driver to dispose the reflector. Then, the shutter driver is driven to irradiate the laser beam, the deflector is driven to deflect the laser beam to the maximum, and the value of the output signal of the emission angle detector at that time is stored in the controller. The ophthalmologic apparatus according to any one of claims 1, 2 and 10, wherein control is performed so as to confirm the movable range of the laser light by comparing the predetermined range with a predetermined value.

According to a seventeenth aspect of the present invention, there is provided a reflector driver for disposing a reflector at a laser beam imaging position on the front surface of an objective optical system, provided in a reflected light receiving optical system and substantially conjugate with the reflector arrangement position. An imager, a shutter driver for driving a laser shutter, and when the controller determines that the pre-operation inspection is to be performed, the controller drives the reflector driver to dispose the reflector, and drives the shutter. When the device is driven to retract the laser shutter from the optical path,
The control according to claim 1, wherein the operation of the laser shutter is controlled by determining whether or not there is a change in the output signal of the imager due to the laser light.
An ophthalmologic apparatus according to any one of claims 2 and 11.

According to a still further aspect of the present invention, there is provided a reflector driver for disposing a reflector at a laser beam imaging position on the front surface of an objective optical system, provided in a reflected light receiving optical system and substantially conjugate with the reflector arrangement position. An imager, a shutter driver that drives a laser shutter, a calculator that calculates irradiation energy by integrating the output of laser light and the irradiation time, and calculates a ratio between the value of the irradiation energy and a predetermined value; A second display for displaying the ratio calculated by the arithmetic unit; if the controller determines that the pre-operation check is to be performed, the controller drives the reflector driver to dispose the reflector, and drives the shutter; 13. The apparatus according to claim 1, wherein the calculator is driven to irradiate laser light continuously for a predetermined time, and a result calculated by the calculator is displayed on the second display. Ophthalmology as claimed It is the location.

According to a nineteenth aspect of the present invention, there is provided an input device for instructing the stop of the pre-start inspection, and when the stop instruction is input, the input device is provided even if the controller determines that the pre-start inspection is to be performed. The ophthalmologic apparatus according to any one of claims 1 to 18, wherein the pre-operation check is stopped.

According to a twentieth aspect of the present invention, an input device for changing a condition setting is provided, and the setting condition recorded in the controller can be changed according to an input to the input device. An ophthalmologic apparatus according to any one of claims 1 to 19.

[0050]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiment. FIG. 1 is a configuration diagram of an embodiment in which the present invention is applied to a fundus blood flow meter for measuring a blood flow velocity of a fundus blood vessel of a subject's eye. The field of application of the present invention is not limited to a fundus blood flow meter, an ophthalmologic apparatus that irradiates a subject with laser light,
For example, the present invention can be widely applied to an ophthalmologic apparatus for inspecting, photographing, or operating an eye to be inspected by laser light irradiation.

A fundus blood flow meter 2 is mounted on a base 1, a frame 3 is set up in front of the eye E to be examined, and a reflector 5 is provided at the upper end thereof via a reflector driver 4. It is rotatable downward and horizontally. A joystick 6 and a display 7 composed of a plurality of LEDs are provided on the examiner side of the base 1, and a switch 8 is mounted on the joystick 6.

The fundus blood flow meter 2 is configured to present a fixation target via a fundus illumination optical system. Specifically, on an illumination optical system from an observation light source 11 such as a tungsten lamp that emits white light to an objective lens 12 facing the eye E, a fixation target display element movable along an optical path is provided. A transmissive liquid crystal panel 13, a relay lens 14, a perforated mirror 15, and a bandpass mirror 16 are sequentially arranged.

Behind the perforated mirror 15, a focus lens 17, an imaging lens 18, a half mirror 19, and an eyepiece 20 are arranged to reach an examiner's eye e. In the reflection direction of the half mirror 19, a two-dimensional CCD camera 22 is arranged via a lens 21 to form a fundus observation optical system.

An image rotator 23 and a double-side polished galvanometric mirror 24 having a rotation axis perpendicular to the paper are arranged on the optical path in the reflection direction of the band-pass mirror 16. The second focus lens 25 is disposed in the reflection direction of the lens, and the lens 26 is positioned in the reflection direction of the upper reflection surface 24b.
A laser shutter 27 for opening and closing laser light irradiation and a focus unit 28 movable along the optical path are arranged. The front focal plane of the lens 12 has a conjugate relationship with the pupil of the eye E to be examined, and a galvanometric mirror 24 is disposed on this focal plane.

The laser shutter 27 is a shutter driver 2
The shutter 9 is driven by the shutter 9 to detect whether the shutter is opened or closed by a shutter open / close detector such as a microswitch. Behind the galvanometric mirror 24, a relay lens 30 and a concave mirror 31 are arranged, and a lower reflective surface 24a of the galvanometric mirror 24 is provided.
A relay optical system that guides a light beam that passes through without being reflected at the upper reflecting surface 24b of the galvanometric mirror 24 is configured.

In the focus unit 28, a dichroic mirror 32 and a condenser lens 33 are sequentially arranged on the same optical path as the lens 26, and a split prism mask 34 and a mirror 35 are provided on the optical path in the direction of reflection of the dichroic mirror 32. The focus unit 28 can be integrally moved in the direction indicated by the arrow. In addition, in the incident direction of the mirror 35,
A tracking light source 36 such as a He-Ne laser that emits light of high luminance, for example, green light is provided. The collimator lens 3 is located on the optical path in the incident direction of the condenser lens 33.
7. A measuring laser diode 38 that emits coherent, for example, red light is arranged.

An optical path from the tracking light source 36 and the laser diode 38 to the eye E through the objective lens 12 through the galvanometer mirror 24 and the relay optical system constitutes an irradiation optical system. The pan-pass mirror 16 has a characteristic of reflecting the light reflected by the measuring laser diode 38 and transmitting the light reflected by the tracking light source 36.

On the optical path in the reflecting direction of the lower reflecting surface 24a of the galvanometric mirror 24, a focusing lens 25 movable along the optical path, a dichroic mirror 39, a field lens 41, a magnifying lens 42, and an image intensifier are provided. The one-dimensional CCDs 43 are sequentially arranged to form a blood vessel detection system.

On the optical path in the direction of reflection of the dichroic mirror 39, an imaging lens 44, a confocal stop 45, and a mirror pair 46a provided substantially conjugate with the pupil of the eye E,
Reference numeral 46b is disposed, and photomultipliers 47 and 48 are disposed in the reflection directions of the mirror pairs 46a and 46b, respectively, to form a light receiving optical system for measurement.

A light receiving optical system is constituted by the above-described blood vessel detecting system, the light receiving optical system for measurement, and the fundus observation optical system. For convenience of illustration, all the optical paths are shown on the same plane, but the reflected optical paths of the mirror pairs 46a and 46b, and the optical paths from the measurement optical path in the emission direction of the tracking light source 36 to the mask 34 are respectively orthogonal to the paper surface. ing.

Further, a system control unit 51 for controlling the entire apparatus is provided.
One-dimensional CCD 43, photomultipliers 47, 48,
An angle detector 52 for detecting the angle of the galvanometric mirror 24 and an output of the switch 8 are connected to each other. An output of the system control unit 51 is a reflector driver 4 for driving the reflector 5, a galvanometric mirror 24. Drive, a shutter drive 29 for driving the shutter 27, for example, a controller 54 composed of a personal computer, the irradiation energy is calculated from the measured irradiation time of the laser light and the output of the laser light, and the maximum allowable laser energy is calculated. Calculator 5 for calculating the ratio of (MPE)
5 and a display 7 for displaying the ratio calculated by the calculator 56 using LEDs.

The controller 54 includes a mode selector 56 for selecting whether to set a measurement mode for performing measurement by the fundus blood flow meter 2 or an analysis mode for analyzing acquired measurement data, and a timer for measuring time. 57, a memory 58 for measuring and storing the time when entering the measurement mode and the time when leaving the measurement mode by the mode selector 56, the setting condition changing device 59, and the cancel switch 6
0, the monitor 61 is connected. The timer 57 keeps measuring time even when the power of the apparatus is turned off.

When the examiner uses the fundus blood flow meter 2 to measure the blood flow velocity of the retinal blood vessels in the fundus of the eye E to be examined, the examiner turns on the controller 54 and the fundus blood flow meter 2 to turn on the controller. Reference numeral 54 denotes a program for operating the fundus blood flow meter 2. This program consists of two modes: a measurement mode for obtaining data for obtaining a blood flow velocity of the fundus by the fundus blood flow meter 2, and an analysis mode for analyzing the obtained data to obtain a result. Usually, the program is started in the analysis mode.

In the analysis mode, an analysis screen is displayed on the monitor 61, and the system controller 51 is displayed from the viewpoint of safety.
In order to prevent any light beam from being emitted from the objective lens 12, any operation related thereto is not accepted.

When the examiner selects a measurement mode with the mode selector 56, the controller 54 displays a measurement screen on the monitor 61. Then, a signal for canceling the operation prohibited in the analysis mode is sent to the system control unit 51.
In order to determine whether or not to perform a pre-operation check, the controller 54 reads out the time at which the measurement mode was entered by the timer 57, and at the same time, reads out the time at which the previous measurement mode was stored in the memory 58. To compare the two times.

Now, it is assumed that the setting condition set in the controller 54 is that the dates of the two times are different, that is, the inspection is performed once a day before starting work.
If the dates of the two times are the same, the setting condition is not satisfied, so that it is determined that "there is no need for pre-operation inspection", and the blood flow velocity of the subject can be measured as it is. However, if the dates are different, it is determined that "pre-operation inspection is necessary" and the pre-operation inspection is started.

The setting conditions set in the controller 54 are determined by the setting condition changing device 60, for example, as follows: "The months at the two times are different, that is, once / monthly inspection before starting work", "2. Time is a predetermined time (for example, 1
2 hours) or more, that is, once every 12 hours,
Perform pre-operation inspections ".

Next, the pre-start inspection will be described. As shown in FIG. 2, the controller 54 first displays information on the inspection items on the monitor 61. FIG. 2 shows the inspection items and the progress of informing the inspector which items are currently being inspected. The currently performed items are indicated by “で”, and the time to the end of all inspections is indicated in the upper right.

Next, the controller 54 sets the system control unit 5
1. Make preparations for the pre-operation inspection. The system control unit 51 drives the reflector driver 4 to dispose the reflector 5 whose surface is made of, for example, Kent paper at the laser beam imaging position.

The system controller 51 irradiates the tracking light source 36 and the measuring laser diode 38 in order to check the first inspection item “shape of laser light”. As shown in FIG. 3, the light beam TL for tracking is shaped by the mask 34 with the split prism, and the light beam separated into two light beams at the center and both ends is applied to the reflector 5. The measurement light beam ML is superimposed on the center of the center. The two-dimensional CCD camera 22 and the one-dimensional CCD 43
To capture an image.

FIG. 4B shows an output signal from the one-dimensional CCD 43 of the imaged tracking light flux. Since the light beam is wavelength-separated by the dichroic mirror 39, the light incident on the one-dimensional CCD 43 is only the tracking light beam.

FIG. 4A shows a signal in a state where the tracking light source 36 has not been irradiated yet, so that there is no output signal. When irradiated, as shown in FIG. 4B, an output signal is generated at a portion corresponding to a bright portion by the laser beam.
Two V-shaped portions correspond to split breaks.

Upon receiving the output signal from the one-dimensional CCD 43, the system control unit 51 detects the output voltage of each pixel of the CCD 43, calculates the number of pixels corresponding to A, and sends the result to the controller 54. . The controller 54 compares the number of pixels with the number of pixels preset in the controller 54, and determines that there is no problem if the difference is within the allowable range.

On the other hand, as shown in FIG. 3, the two-dimensional CCD camera 22 captures two laser beams together, and FIG.
Among the scanning lines of the CD camera 22, only the scanning lines L1 to L5 which scan characteristic portions are shown. When the measurement light beam ML enters the video signal of the scanning line, the light beam
As shown in the figure, it appears at a location corresponding to the center of the tracking light beam TL.

Here, the system control unit 51 calculates the time width d of the scanning line when the time width of the signal of the portion corresponding to the measuring light beam ML in each scanning line becomes maximum.

The scanning line L at which the measurement light beam ML starts to be emitted is
The time from 2 to the end of the scanning line L4 is calculated. The two data are sent to the controller 54, and the controller 54 compares each time with each time preset in the controller 54, and determines that there is no problem if the difference is within the allowable range.

When there is no problem in the shape of the laser beam, the next inspection item, that is, the unevenness of the illumination of the laser beam, is inspected. Regarding the tracking laser beam, the system control unit 51 calculates the average of the output signals of the darkest part corresponding to C except for the brightest part corresponding to B and the dark part due to the gap of the split in FIG. Send to The controller 54 compares the average value with an allowable value preset in the controller 54, and determines that there is no problem if the difference is within the allowable range.

As for the measurement laser light, the system control unit 51 extracts a portion corresponding to the measurement laser light from the video signal shown in FIG. 5, calculates the position of the center of gravity, and sends it to the controller 54. The controller 54 compares the amount of movement of the position of the center of gravity with an allowable value preset in the controller 54, and if the difference is within the allowable range, there is no problem.
Is determined.

If there is no problem in the unevenness of the illumination of the laser beam, the next inspection item, the laser shutter operation, is inspected. The controller 54 sends a signal to the system control unit 51 to confirm the operation of the laser shutter 27. Upon receiving the signal, the system control unit 51 drives the shutter driver 54 to retract the laser shutter 27 from the optical path. Then, when the laser shutter 27 is in the optical path as described above, the one-dimensional CCD 43
Although the output signal of the CD 43 does not change at all as shown in FIG. 4A, when the laser shutter 27 is retracted from the optical path, the output voltage is reduced by irradiating the laser beam as shown in FIG. Changes occur. System control unit 51
Reads the values of "B" and "C" of the output voltage and sends the result to the controller 54. The controller 54 compares the absolute output value with the absolute output value in the controller 54 in advance, and determines that the laser shutter 27 is operating normally if the transmitted output value is within the allowable range.

Subsequently, the movable range of the laser beam is confirmed. The controller 54 causes the system control unit 51 to perform a work of confirming the movable range of the laser beam. In the system control unit 51, the laser shutter 27 is moved through the shutter driver 54 to emit laser light.

FIG. 6 shows a state in which the examiner's eye e looks at the reflector 5 through the eyepiece 20. V is a visual field range in the finder, and M is a circle indicating the measurable range of the fundus blood flow velocity. When the laser shutter 27 is retracted out of the optical path, the laser light is located at the position shown by the dotted line at the center of FIG.

Next, the system control section 51 drives the mirror driver 53 from this state to flow the maximum current to the galvanometric mirror 24. At that time, as shown by the solid line in FIG. 6, the laser light is shifted to one side, and the measurement laser light is outside the measurement range area M. Angle detector 52
Detects the deflection angle of the galvanometric mirror 24,
The result is sent to the controller 5 via the system controller 51.
4 The controller 54 compares the transmitted angle information with the angle information preset in the controller 54, and determines that the movable range of the laser beam is normal in one direction if it is within the allowable range.

Similarly, the galvanometric mirror 24 is also shaken on the opposite side for evaluation, and if normal, the final conclusion is that there is no problem in the movable range of the laser.

Finally, the MPE calculation is confirmed. The controller 54 causes the system control unit 51 to start checking the MPE calculation. The system control unit 51 continuously irradiates both the tracking light source 36 and the laser diode 36. The continuous irradiation time is indicated by the LE 7
This is the time for irradiating the irradiation energy corresponding to the lighting of one of D. On the other hand, when the laser beam irradiation is started, the computing unit 56 calculates the irradiation energy from the output of each laser beam stored in the computing unit 56 and the irradiation time sent from the timer 57, and calculates the maximum allowable laser energy. The calculation of the ratio with is started. Then, when the ratio is such that one of the plurality of LEDs of the display 7 is turned on, the system control unit 51 performs control to cause the display 7 to turn on one LED.

The examiner confirms this and confirms that the calculation of the MPE is performed correctly. In this embodiment, the value stored in the arithmetic unit 56 is used for the output of the laser light. However, an actual laser light output may be measured by providing a measuring unit.

With this configuration, the inspection before starting work can be performed before the measurement, so that the measurement can be started without any problem. When the pre-operation inspection is completed, the monitor 61
Is set to the measurement mode and normal measurement can be performed.

In the present embodiment, the time when the measurement mode is entered and the time stored in the memory 58 are compared, and if the conditions for performing the pre-operation inspection are not satisfied, the measurement mode is maintained. Measurement can be performed as usual.

In the present embodiment, the setting condition for determining whether or not to perform the pre-operation inspection is described as "the two times have different dates, that is, once / day pre-operation inspection is performed". However, by providing the setting condition changing means 59, for example, it is set that "the months at the two times are different, that is, once / perform the inspection before the start of the month",
It can be freely changed, for example, by setting "when the difference between the two times, that is, when the time becomes 10 hours or more, perform a pre-operation check".

For example, in this embodiment, the date is changed while the pre-operation inspection is completed in order to perform the measurement at midnight, the measurement is performed, and then the measurement data acquired in the analysis mode is analyzed. If you try to measure again, you will start the pre-operation inspection again. In such a case, it is unlikely that a problem will occur in the apparatus, and in such a case, it is convenient to use the stop switch 60 to stop the pre-operation inspection so that measurement can be performed. .

Further, in the present embodiment, the apparatus itself performs all the inspections, but the inspector may perform the inspections. In this case, when the switch 8 is pressed to irradiate the laser beam, the laser shutter 27 is moved to the system controller 51 through the shutter driver 29. By rotating the switch 8 for the movable range of the laser beam, the system controller 51 similarly controls the mirror driver 5.
3 is driven to move the galvanometric mirror 24.

Although the shape of the laser beam, the illumination unevenness, and the movable range of the laser beam are visually determined,
If there is a problem in use, it is often sufficient because it can be visually recognized. At this time, by adding an operation procedure to the content displayed in FIG. 2, the examiner can surely perform the inspection, which is convenient.

[0092]

The ophthalmologic apparatus according to the first aspect of the present invention performs a pre-operation check when the time has elapsed by counting the timer, thereby confirming that the operation is normal in advance, and performing the test. Can reduce the possibility of failure.

In the ophthalmologic apparatus according to the second aspect, a time problem is confirmed by performing a pre-operation inspection by measuring the time of the timer, and the possibility that a problem occurs can be reduced.

In the ophthalmologic apparatus according to the third aspect, the starting point of the lapse of the predetermined time is used as the starting point of the previous time, and the condition for executing the pre-use inspection can be the lapse of time from the previous time.

In the ophthalmologic apparatus according to the fourth aspect, the time required to determine whether or not to start the pre-operation inspection is when the measurement data acquisition is completed and when the measurement data acquisition is started. The time measurement becomes more accurate as compared with the case where the time is measured at the time when the power is turned on and when the power is turned on.

In the ophthalmologic apparatus according to the fifth aspect, the pre-operation inspection is performed only once on the day when the examination or treatment is to be performed before starting the measurement. Eliminate the hassle of starting.

In the ophthalmologic apparatus according to the sixth aspect, when it is determined that frequent pre-operation inspection is unnecessary, for example, when the operation of the apparatus is stable, it may be sufficient to check about once a month. it can.

In the ophthalmologic apparatus according to the seventh aspect, since the judgment is made not based on the interval such as month or day, but based on the interval after the previous measurement, it is possible to perform the pre-operation inspection when the use interval is opened. it can.

The ophthalmologic apparatus according to the eighth aspect has the problem that the maximum blood flow velocity cannot be measured correctly, for example, when the blood flow velocity is obtained from the reflected light of the irradiated laser light which is Doppler shifted by the blood flow. A decrease in accuracy can be avoided.

The ophthalmologic apparatus according to the ninth aspect cannot correctly capture a blood vessel image when, for example, the tracking light source has uneven illumination, thereby avoiding the problem of reduced tracking accuracy and the reduced measurement accuracy.

The ophthalmologic apparatus according to the tenth aspect can eliminate the problem that the laser beam cannot be moved to, for example, a desired portion of the fundus and the examination cannot be performed.

The ophthalmological apparatus according to the eleventh aspect can detect in advance that the laser is continuously irradiated against the examiner's intention or cannot be irradiated even when the laser is desired to be irradiated in reverse. This avoids the problem of having to give up after preparing.

In the ophthalmologic apparatus according to the twelfth aspect, there is no fear of excessively irradiating the laser beam, so that the user can concentrate on the examination and treatment without worry.

In the ophthalmologic apparatus according to the thirteenth aspect, the examiner can understand the inspection items and their contents, and if the progress, inspection procedure, etc. are known, how much time is required for the inspection and what to do are clear. Therefore, convenience and certainty in performing the pre-operation inspection can be improved.

The ophthalmologic apparatus according to the fourteenth aspect can confirm the shape of the laser beam based on whether or not the shape is within an allowable value stored in the controller.

The ophthalmologic apparatus according to the fifteenth aspect can check for uneven illumination.

The ophthalmologic apparatus according to the sixteenth aspect can confirm the movable range of the laser beam.

The ophthalmologic apparatus according to claim 17 can check the operation of the laser shutter.

The ophthalmologic apparatus according to the eighteenth aspect can confirm whether the result calculated by the calculator by irradiating the laser beam is correctly displayed on the display.

In the ophthalmologic apparatus according to the nineteenth aspect, the pre-operation check can be stopped and measured by the pre-operation check canceling means.

The ophthalmologic apparatus according to the twentieth aspect can perform a pre-operation check every time the laser beam irradiation becomes possible.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment.

FIG. 2 is an explanatory diagram of information related to a pre-operation check displayed on a monitor.

FIG. 3 is an explanatory diagram of a laser beam irradiated on a reflecting plate.

FIG. 4 is a waveform diagram of an output signal of a one-dimensional CCD.

FIG. 5 is a waveform diagram of an output signal of a two-dimensional CCD camera.

FIG. 6 is an explanatory diagram of a state in which a reflector is observed through an eyepiece.

[Explanation of symbols]

 Reference Signs List 1 base 2 fundus blood flow meter 5 reflector 7 display 8 switch 11 observation light source 12 objective lens 13 liquid crystal panel 15 perforated mirror 20 eyepiece 22 two-dimensional CCD camera 23 image rotator 24 galvanometric mirror 27 laser shutter 28 focus unit Reference Signs List 32 dichroic mirror 34 mask with split prism 36 tracking light source 38 laser diode 43 one-dimensional CCD 47, 48 photomultiplier 51 system control unit 52 angle detector 54 controller 55 arithmetic unit 56 mode selector 57 timer 58 memory 59 setting condition changing device 60 Stop switch 61 Monitor E Eye to be examined

Claims (20)

[Claims] An ophthalmologic apparatus having a laser light source and irradiating a laser beam to an eye to be examined has a controller and a timer for measuring time even when a power supply is turned off, wherein the controller operates the timer when the power supply is turned on. Read the timekeeping,
An ophthalmologic apparatus that performs a pre-operation check when the date or month has changed from the last use or when a predetermined period has elapsed. 2. An ophthalmologic apparatus having a laser light source and irradiating a laser beam to an eye to be examined has a controller and a timer that keeps measuring time even when a power supply is turned off, and the controller is set to a state where the next laser beam can be irradiated. When the time has come, the time of the timer is read out, compared with a predetermined time, and if it is determined that the comparison result satisfies the setting conditions set in the controller in advance, it is possible to perform a pre-operation inspection. Ophthalmic equipment characterized. 3. The ophthalmologic apparatus according to claim 2, wherein the predetermined time is a time at which the laser beam is released from the state in which the laser beam can be irradiated, and a memory for storing the predetermined time is provided. 4. A mode selector for selecting a measurement mode for irradiating the subject's eye with laser light to obtain signal light and an analysis mode for analyzing the signal light, wherein the laser light can be irradiated. The ophthalmologic apparatus according to claim 2, wherein the measurement mode is selected by the mode selector. 5. The setting condition set in the controller is that the predetermined time is different from the time measured by the timer when the laser beam irradiation becomes possible next time, and the date is different. The ophthalmologic apparatus according to claim 2, wherein: 6. The setting condition set in the controller is different from a month when the predetermined time is compared with a time measured by the timer when the laser beam can be irradiated next time. The ophthalmic apparatus according to claim 2, wherein: 7. The setting condition set in the controller is that the predetermined time is compared with a time measured by the timer when the next laser beam irradiation is enabled, and the time is set to a predetermined time. The ophthalmologic apparatus according to claim 1, wherein the number is greater than the number. 8. The pre-operation inspection includes irradiating a laser beam with a reflector disposed at a laser beam imaging position on the front surface of the objective optical system, and the shape of the laser beam radiated on the reflector is equal to or less than an allowable value. The ophthalmologic apparatus according to claim 1, wherein the determination is made. 9. The pre-operation inspection includes irradiating a laser beam by arranging a reflector at a laser beam imaging position on the front surface of the objective optical system, and the unevenness of illumination of the laser beam applied to the reflector is below an allowable value. The ophthalmologic apparatus according to claim 1, wherein the determination is made as to whether or not the condition is satisfied. 10. The pre-operation inspection includes arranging a reflector at a laser light image forming position in front of the objective optical system, irradiating the laser light, deflecting the laser light, and confirming a movable range of the laser light. The ophthalmologic apparatus according to claim 1, wherein: 11. The pre-operation inspection is performed by arranging a reflector at a laser beam imaging position on the front surface of the objective optical system and confirming whether an opening / closing operation of a laser shutter provided in the irradiation optical system is performed. The ophthalmologic apparatus according to claim 1, wherein the determination is made based on the presence or absence of a laser beam applied to the reflection plate. 12. The pre-operation inspection is characterized in that an irradiation energy is calculated from an irradiation time and an output of a laser beam, a ratio between the value of the irradiation energy and a maximum allowable laser energy is calculated, and the result is displayed. The ophthalmologic apparatus according to claim 1 or 2, wherein 13. A first indicator is provided, and when the controller determines that the pre-operation inspection is to be performed, the controller displays information on an inspection item to be executed at the time of the pre-operation inspection.
The ophthalmologic apparatus according to claim 1, wherein the information is displayed on a display device. 14. A reflector driver for disposing a reflector at a laser beam imaging position on the front surface of an objective optical system, an imager disposed at a position substantially conjugate with the reflector disposed in a reflected light receiving optical system, When the controller determines that the pre-operation inspection is performed, the controller drives the reflector driver to dispose the reflector, and drives the shutter driver to drive the laser. Irradiated with light and controlled to confirm the shape of the laser light by checking whether the shape of the laser light is within an allowable value stored in the controller or not according to the output signal of the imager that captured the laser light. The method according to claim 1,
The ophthalmic apparatus according to any one of claims 2 and 8. 15. A reflector driver for disposing a reflector at a laser beam imaging position on the front surface of an objective optical system, an imager provided in a reflected light receiving optical system and disposed at a position substantially conjugate with the reflector arrangement position, and a laser. A shutter driver for driving a shutter; if the controller determines that the pre-operation inspection is to be performed, the controller drives the reflector driver to dispose the reflector, and drives the shutter driver to emit a laser beam; It is controlled to perform the illumination unevenness confirmation by checking whether or not the illumination unevenness of the laser light is within an allowable value stored in the controller by an output signal of the imager that images the laser light. Claims 1, 2, 9
The ophthalmologic apparatus according to claim 1. 16. A reflector driver for disposing a reflector at a laser beam imaging position on the front surface of an objective optical system, a shutter driver for driving a laser shutter, a deflector for deflecting a laser beam to be irradiated, and a deflector for the deflector. An emission angle detector that detects an emission angle to the optometry, and when the controller determines that the pre-operation inspection is to be performed, drives the reflection plate driver to dispose the reflection plate, and controls the shutter driver. Driving and irradiating the laser beam, driving the deflector so as to deflect the laser beam to the maximum, and comparing the value of the output signal of the emission angle detector at that time with a predetermined value stored in the controller 2. The method according to claim 1, wherein the control is performed so as to confirm a movable range of the laser beam.
The ophthalmologic apparatus according to claim 1. 17. A reflector driver for disposing a reflector at a laser beam imaging position on the front surface of an objective optical system, an imager provided in a reflected light receiving optical system and arranged at a position substantially conjugate to the reflector arrangement position, and a laser. When the controller determines that the pre-operation inspection is to be performed, the controller drives the reflector driver to dispose the reflector, and drives the shutter driver to drive the laser. When the shutter is retracted from the optical path, control is performed so as to confirm the operation of the laser shutter by determining whether there is a change in the output signal of the imager due to the laser light. Any one of items 1, 2, and 11
An ophthalmic device according to one of the claims. 18. A reflector driver for disposing a reflector at a laser beam image forming position in front of an objective optical system, an imager provided in a reflected light receiving optical system and arranged at a position substantially conjugate with the reflector arrangement position, and a laser. A shutter driver for driving a shutter, a calculator for calculating irradiation energy by integrating the output of the laser beam and the irradiation time, and calculating a ratio of the value of the irradiation energy to a predetermined value; and a ratio calculated by the calculator. When the controller determines that the pre-operation check is performed, the controller drives the reflector driver to dispose the reflector, and drives the shutter driver to emit laser light. The ophthalmologic apparatus according to any one of claims 1, 2, and 12, wherein the light is continuously irradiated for a predetermined time, and a result calculated by the calculator is displayed on the second display. . 19. An input device for instructing to stop the pre-start inspection is provided, and when the stop instruction is input, the pre-start inspection is stopped even if the controller determines that the pre-start inspection is to be performed. 2. The method according to claim 1, wherein
The ophthalmologic apparatus according to claim 8. 20. An apparatus according to claim 1, further comprising an input device for changing a condition setting, wherein a setting condition recorded in said controller can be changed in accordance with an input to said input device. An ophthalmic device according to claim.