JP3490480B2 - Ophthalmic equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separation type ophthalmologic apparatus represented by a handheld system, and more particularly to an ophthalmologic apparatus in which information communication is performed between a plurality of apparatuses.

[0002]

2. Description of the Related Art A conventional ophthalmic examination apparatus such as an objective eye refractive power measuring apparatus or a corneal shape measuring apparatus has an observing section, a measuring section,
Since it is composed of many parts such as the display part and recording part,
It has a large capacity and a considerable weight, and it is difficult to move it easily. However, recent rapid advances in electronics technology have made it possible to miniaturize various devices, and in the field of ophthalmology, a handheld type inspection device was born. These handheld devices are required to be omitted as much as possible without losing the advantages of small size and light weight. Therefore, it is conceivable to separate functions such as printing as separate units.As a method of exchanging measurement data between devices of such a separation type device, a communication method in which both are connected by a cable is the simplest. There is (RS-232C for serial communication, Centronics, etc. for parallel communication).

[0003]

However, when the measuring unit main body and the separate unit are connected by a cable, there is a problem that the cable interferes with the measurement. Further, the cable is easily broken, so that there is a drawback that maintenance is troublesome. The present invention has been devised in view of the above-mentioned drawbacks, and is an ophthalmologic apparatus in which a unit such as a measurement unit main body and a unit such as a print are separated, and which can communicate with each other without providing a cable. It is a technical issue to provide

[0004]

In order to solve the above problems, the ophthalmologic apparatus of the present invention is characterized by having the following configuration. (1) A measurement unit unit having an alignment optical system for aligning with the eye to be inspected and a measurement optical system for measuring the eye to be inspected, and a measurement result by the measurement unit unit which is arranged separately from the measurement unit unit and printed, etc. An optical communication unit having a separating unit for performing measurement, an optical transmitting unit arranged in the measuring unit unit for transmitting the measurement result, and an optical receiving unit arranged in the separating unit for receiving the transmission by the transmitting unit; The light source of the light transmitting means is shared with the light source of the alignment optical system or the measurement optical system, and the mode switching is provided. Means for selectively controlling the light transmission of the light source by means.
It is characterized in that optical communication becomes possible when the communication mode is selected by the mode switching means.

(2) A measurement unit unit having an alignment optical system for alignment with the eye to be examined and a measurement optical system for measuring the eye to be examined, and a measurement result by the measurement unit unit arranged separately from the measurement unit unit. Optical communication means having a separation unit for printing etc., optical transmission means arranged in the measuring unit unit for transmitting the measurement result, and optical reception means arranged in the separation unit for receiving the transmission by the transmission means. And a mode switching means for selectively switching the communication mode and the measurement mode,
The separation unit has holding means for holding the measuring section unit, and the optical communication means is arranged so that optical communication is performed in a state where the measuring section unit is held by the holding means. To do.

(3) The holding means of (2) has a contact for charging the battery of the measuring unit.

[0007]

[0008]

[0009]

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The apparatus of the embodiment is a handheld type corneal shape measuring apparatus, and FIG. 1 is a view of the measuring unit main body as seen from the inspector side. Reference numeral 1 denotes a measuring unit main body, which houses an optical system for measurement and observation, and an electric system for control and calculation. The operation switch group 2 is provided on the examiner side of the main body 1.
The print switch 2a is a communication start switch for transmitting measurement data to the printer unit main body described later. 3 is an observation window for observing the eye to be inspected for alignment, and 4 is a liquid crystal display for displaying measurement results. The lower part of the measuring unit main body 1 has a grip shape so that the device can be held by one hand. The battery 5 is detachably accommodated in the lower part of the grip.

FIG. 2 is a schematic layout of the optical system of the apparatus.
Reference numeral 10 is an eye to be inspected, which is a measurement target, and 11 is an eye to be inspected. The examiner's eye 11 magnifies and observes the subject's eye 10 via the observation lens 12. Reference numeral 13 is a light source for a fixation target, and 14 is a fixation target plate having a spot opening. The fixation target plate 14 is projected onto the fundus of the eye to be inspected by the concave lens 15 and the imaging lens 16 via the dichroic mirror 17 and the beam splitter 18, so that the eye to be inspected fixes the fixation target plate 14. Reference numeral 19 denotes an optotype projection optical system for measuring corneal shape, and four sets are arranged at 90-degree intervals on the same circumference centered on the observation optical axis. Each target projection optical system 19a to 19d (19c and 19d are not shown) is formed of an LED 20 that emits light in the near infrared region, a spot diaphragm 21, and a collimator lens 22. The LED 20 is used not only as a measurement light source but also as a light source for information communication described later. Reference numeral 23 is a telecentric diaphragm, and the telecentric diaphragm 23 is arranged at the focal position of the imaging lens 16. Reference numeral 24 denotes a two-dimensional CCD image pickup device, and the CCD image pickup device 24 and the vicinity of the iris on which a corneal reflection image is formed are conjugate to the imaging lens 16, and CC
The D image pickup device 24 detects the position of the corneal reflection image by the target projection optical system 19. The CCD image pickup device 24 also receives an optical signal from the printer unit 30. Reference numeral 25 denotes LEDs arranged on the same circumference centered on the observation optical axis at intervals of 30 degrees. Each LED 25 is provided with a spot diaphragm 26 and a collimator lens 27, and the entire corneal reflection image thereof functions as a earring.

FIG. 3 shows a printer unit 30, which prints out the measurement result transmitted from the measuring section main body 1 or transmits it to another computer. Printer unit 3
On the upper surface of 0, there is provided a measuring unit main body holding unit 31 into which the measuring unit main body 1 can be fitted with the side facing the subject facing downward. The measuring unit main body holding unit 31 is provided with a light emitting unit 32 that emits infrared light along the optical axis of the measuring optical system of the measuring unit main body 1. Further, when the measuring unit main body 1 is fitted into the printer unit 30, the visual target projection optical system 19
A light receiving unit 33 is attached to the printer unit side at a position facing the LED 20d (not shown). A cylindrical blocking wall 34 is provided so as to prevent transmission from the measurement unit body 1 to the printer unit 30 and transmission from the printer unit 30 to the measurement unit body 1. 35
Is a contact for charging the battery, and charging is started at the same time when the measuring unit body 1 is fitted. A printer 36 prints out the measurement result. The power supply of the printer unit 30 may be supplied by a cable via an AC adapter, but a battery type is more convenient for movement and a cable for communication (not shown). Can connect to the host computer.

FIG. 4 shows the measuring unit body 1 and the printer unit 3.
FIG. 3 is a block diagram showing a schematic configuration of transmission and reception of an optical signal with 0. Reference numeral 40 denotes a microcomputer incorporated in the measuring unit main body 1, and the microcomputer 40 controls the control circuit of the LED 20 from the measurement control circuit 41 to the transmission control circuit 42 based on the mode signal (measurement or communication) or vice versa. Switch to. Further, the microcomputer 40 selectively connects the CCD image pickup device 24 to a signal processing circuit of either the measurement detection circuit 43 or the reception detection circuit 44. Reference numeral 45 is a microcomputer provided in the printer unit 30. The light receiving unit 33 receives the optical communication signal from the LED 20 and sends the signal to the microcomputer 45 via the reception detection circuit 46. Further, the microcomputer 45 modulates a communication signal into an optical communication signal via the transmission control circuit 47 and the light emitting section 32, and sends the optical communication signal to the measuring section main body 1.
Reference numeral 48 is a printer control circuit, and 36 is a printer.

The operation of the apparatus having the above-mentioned configuration will be described with a focus on communication operation. The measurement unit main body 1 measures the corneal shape of the eye to be inspected, and the measurement result is stored in the microcomputer 40. If the print switch 2a is not pressed, the LED 20 causes the measurement control circuit 41 to
The CCD image pickup devices 24 are connected to the measurement and detection circuits 43, respectively. Measuring unit main body holding unit 3 of the printer unit 30
By fitting the measuring unit main body 1 into the battery 1, the battery 5 and the contact 35 for charging the battery come into contact with each other, and the charging of the battery 5 is started. Print switch 2a of measuring unit body 1
When is pressed, the LED 20 causes the transmission control circuit 42 to CC
The D image pickup device 24 is switched and connected to the reception detection circuit 44. The LED 20 emits a signal to the printer unit 30 as to whether or not it is ready for reception, and when the light receiving unit 33 receives this signal, the light emitting unit 32 emits a signal indicating completion of preparation to the measuring unit main body 1. When the CCD image pickup device 24 receives the preparation completion signal, the transmission of the measurement data is started. The microcomputer 45 commands to issue an end signal when it is confirmed that the measurement data has been received, and to issue a retransmission signal when it cannot receive the measurement data. When the end signal is received from the printer unit 30, the measuring unit body 1 is powered off. The microcomputer 45 is the printer control circuit 4
The printer 36 is driven via 8 to print out the measurement data. Further, the control information of the measuring unit body 1 can also be transmitted from the printer unit 30 to the measuring unit body 1 by the same method.

The above embodiment can be variously modified,
The presence / absence of the placement of the measurement unit body 1 on the measurement unit body holding unit 31 may be detected, and when the measurement unit body 1 is placed at a predetermined position, the mode may be automatically switched to the mode for starting communication. In addition, although an example has been described in which communication is performed while the measurement unit main body and the print unit are in contact with each other, the present invention is not limited to this, and communication may be performed in a state where the two are separated. However, in this case, it is desirable to remove the collimator lens 22 and change the communication light flux to be divergent.

[0016]

According to the present invention, it is possible to provide a printing function for measuring data and the like without impairing the advantages of the handheld type ophthalmologic apparatus that is small and lightweight.

[Brief description of drawings]

FIG. 1 is a diagram of a measuring unit of a corneal shape measuring apparatus viewed from an examiner side.

FIG. 2 is a schematic diagram of an arrangement of an optical system of a measuring unit.

FIG. 3 is a schematic plan view showing a printer unit.

FIG. 4 is a block diagram showing a control system of an apparatus mainly for optical communication.

[Explanation of symbols]

1 Measuring unit body 2 Operation switch group 20 LED 24 CCD image sensor 30 printer unit 31 Measuring unit main body holding unit 32 Light emitting part 33 Light receiving part 36 Printer 40,45 microcomputer

Continuation of the front page (56) Reference JP-A-2-5920 (JP, A) JP-A-1-256928 (JP, A) JP-A-3-136634 (JP, A) JP-A-63-65842 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61B 3/00-3/16

Claims (3)

(57) [Claims] 1. A measurement section unit having an alignment optical system for aligning with the eye to be examined and a measurement optical system for measuring the eye to be examined, and a measurement result by the measurement section unit arranged separately from the measurement section unit. An optical communication unit having a separation unit for printing or the like, an optical transmission unit arranged in the measurement unit unit for transmitting the measurement result, and an optical reception unit arranged in the separation unit for receiving the transmission by the transmission unit, , A communication mode and a mode switching means for selectively switching the measurement mode, and the light source of the light transmitting means is shared with the light source of the alignment optical system or the measurement optical system, A control means for selectively controlling the light transmission of the light source by the mode switching means is provided, and optical communication becomes possible when the communication mode is selected by the mode switching means. An ophthalmologic device characterized in that 2. A measuring section unit having an alignment optical system for aligning with the eye to be inspected and a measuring optical system for measuring the eye to be inspected, and a measurement result by the measuring section unit arranged separately from the measuring section unit. An optical communication unit having a separation unit for printing or the like, an optical transmission unit arranged in the measurement unit unit for transmitting the measurement result, and an optical reception unit arranged in the separation unit for receiving the transmission by the transmission unit, , A communication mode and a mode switching means for selectively switching the measurement mode, and the separation unit has a holding means for holding the measuring section unit, and the measuring section unit holds the holding section. An ophthalmologic apparatus, wherein the optical communication means is arranged so that the optical communication is performed while being held by the means. 3. The ophthalmologic apparatus according to claim 2, wherein the holding means has a contact for charging a battery of the measuring unit.