JP2615246B2 - Ophthalmic observation and imaging equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic observation photographing apparatus capable of simultaneously observing a fundus image and data in a fundus camera, for example.

2. Description of the Related Art Conventionally, when observing and photographing a fundus image with a fundus camera, character information such as a patient's name and date written on a serial number and a data card is printed on a film together with a fundus image, especially during color photographing. In general, at the same time, such data information can be observed by a finder at the time of observation. As for data information, there is a type in which both a serial number and character information written in a data card can be observed and photographed, or a type in which any of them can be selected.
In any case, in order to observe the character information of the data card, it is necessary to provide a special illuminating means, and the illuminating light is guided by an optical fiber from a dedicated lamp for illumination or a light source for fundus illumination. .

[Problems to be Solved by the Invention] As described above, in the conventional example, in order to observe the character information on the data card, a special illumination light is provided or a special member for guiding the data illumination light from the fundus illumination light source is provided. There is a problem that it is necessary or the mechanism becomes complicated. In addition, there is also a problem in terms of cost, such as the necessity of a plurality of illumination light sources to prevent uneven illumination of the data card.

An object of the present invention is to provide an ophthalmologic apparatus capable of confirming either the display of a numeric display or the contents of a data card when observing data, and enabling the illumination of the data card to be confirmed together with the image of the eye to be examined without providing special lighting means. It is to provide an observation photographing device.

[Means for Solving the Problems] An ophthalmic observation and imaging apparatus according to the present invention for achieving the above-mentioned object is a display for displaying data information in an ophthalmic observation and imaging apparatus for observing and photographing a subject's eye image. A translucent or colored translucent data card which is inserted and removed from the front of the display, is illuminated from the back by the display and writes character information, and Control means for switching the display of the display to a display for illumination of the data card by inserting it into the front,
Means for optically synthesizing data information from the display or information on the data card with an image of an eye to be inspected so as to enable observation with a finder.

[Operation] The ophthalmic observation and imaging apparatus having the above-described configuration can automatically display a display by inserting a translucent or colored translucent data card into the front of a display for displaying data information. The display is switched to the data card illumination display, and the backlight from the display allows the character information on the data card to be observed in the finder together with the subject's eye. When the data card is not inserted, the data is displayed on the display. Data information can be observed with a finder together with the eye to be examined.

[Example] The present invention will be described in detail based on an illustrated example.

FIG. 1 is a block diagram showing one embodiment of an optical system of an ophthalmic camera. Reference numeral 1 denotes an observation light source including a halogen lamp or the like, and a light beam emitted from the observation light source 1 is a condenser lens 2, a xenon discharge. The light enters a mirror 5 via a photographic light source 3 composed of a tube or the like and a condenser lens 4, is deflected there, and sequentially reaches a perforated mirror 8 via a ring slit plate 6 and a relay lens 7. I have.

The light incident on the perforated mirror 8 from the above-described illumination optical system is reflected by the perforated mirror 8 in the direction of the eye E,
It irradiates the fundus oculi Ef of the eye E, passes through the original optical path, further passes through the perforated mirror 8, and reaches the observation and imaging optical system.
An objective lens 9 is arranged between the perforated mirror 8 and the eye E to be examined, and a focusing lens 1 is provided behind the perforated mirror 8.
0, a photographing lens 11, a data mirror 12, a movable mirror 13, a data photographing lens 14, and a photographing film 15 are sequentially arranged. Note that the data mirror 12 is provided in a different optical path from the optical path of the photographing lens 11 and the like. On the reflection side of the movable mirror 13, a data observation lens 16, a mirror 17 for changing the optical path, and a finder lens 18 are arranged. Here, e is the examiner's eye.

Reference numeral 19 denotes a self-luminous type numeric display composed of, for example, an LED, and a data card 20 on which a subject's name or a photographing date and time can be inserted and removed is provided on the front surface thereof,
These data can be projected in the direction of the movable mirror 13 via the mirror 21 and the data mirror 12. Note that a xenon tube 22 for photographing the data card 20 is provided in front of the data card 20.

In this ophthalmic camera, the observation light source 1 and the photographing light source 3 are substantially conjugate with respect to the condenser lens 2, so that the observation light source 1 is turned on at the time of observation, and the photographing light source 3 is momentarily turned on at the time of photographing. The light source image is once formed in the vicinity of the ring slit plate 6 by another condenser lens 4, and then the image of the annular opening of the ring slit plate 6 is formed in the vicinity of the perforated mirror 8 by the relay lens 7, where it is illuminated. Light is reflected and goes to the left. Then, after the image of the annular aperture is formed near the crystalline lens of the eye E by the objective lens 9, the fundus Ef is illuminated.

The reflected light from the fundus Ef goes to the right, forms an image once with the crystalline lens and the objective lens 9, passes through the perforated mirror 8 and a photographic stop (not shown), and passes through the focusing lens 10 and the photographic lens 11.
Will be focused. At the time of observation, the fundus image is guided upward by the movable mirror 13 at the solid line position,
Observed by the examiner's eye e through the finder lens 18, the movable mirror 13 rises to the dotted line position during photographing,
The fundus image is formed on the photographic film 15 via an opened shutter (not shown).

In addition, data observation and recording are performed together with the fundus image by the data observation photographing optical system. FIGS. 2 and 3 show a fundus image M and data information D that can be seen through the finder lens 18. FIG. As shown in FIG. 4, the data card 20 is inserted and removed just before the numeric display 19, and the presence or absence of the data card 20 is detected by a detection switch 23 such as a reflection type photocoupler.

As shown in FIG. 5, when the data card 20 is not inserted in front of the numerical display 19, the numerical display 19 emits its own light and emits numerical information such as a serial number as shown in FIG. Can be confirmed by the examiner's eye e.

As shown in FIG. 6, a translucent and colored translucent data card 20 on which characters such as a date are written is mounted immediately before a numeric display 19, and the data card is operated by a detection switch 23. The presence of 20 is detected, and the numeric display 19 emits light only at the portion indicated by the dotted line as shown in FIG. 7 so as not to affect the character information. The data card 20 is, for example, translucent. When illuminated from the back side, character information drawn on the surface is illuminated as a backlight, and the information of the data card 20 can be confirmed by the examiner's eye e as shown in FIG. it can.

In order to record the character information of the data card 20 on the photographic film 15, the xenon tube 22 for data card photography emits light, and at this time, the numeric display 19 used as a backlight is stopped to emit light. Non-uniformity of illumination due to simultaneous use of illumination light sources can be prevented.

[Effects of the Invention] As described above, the ophthalmic observation and imaging apparatus according to the present invention provides a display for displaying data information by not only displaying the data information but also inserting the data card into the front of the data card. Since it can be used as a light, special illumination for the data card is not required at the time of observation, and character information on the data card can be quickly confirmed by a simple operation.

[Brief description of the drawings]

The drawings show an embodiment of the ophthalmic observation and imaging apparatus according to the present invention,
FIG. 1 is a block diagram of an embodiment applied to a fundus camera, FIG.
FIG. 3, FIG. 3 is an explanatory view of a fundus image and a data information image, FIG. 4 is a perspective view of a data card and a numeric display, FIG. 5 is a front view of the numeric display with the data card removed, FIG. FIG. 7 is a perspective view showing a state where a data card is mounted, and FIG. 7 is a front view. Reference numeral 1 denotes an observation light source, 8 denotes a perforated mirror, 9 denotes an objective lens, 15 denotes a photographing film, 19 denotes a numeric display, 20 denotes a data card, and 22 denotes a xenon tube.

Claims (2)

(57) [Claims] An ophthalmic observation and photographing apparatus for observing and photographing an image of a subject's eye, a display for displaying data information, and a display which is detachably mounted on the front of the display and illuminated from the back by the display. A translucent or colored translucent data card in which character information is written, and the display of the display is switched to a display for illumination of the data card by inserting the data card into the front of the display. And a means for optically synthesizing data information from the display or information on the data card with an image of an eye to be examined so as to enable observation with a finder. 2. The ophthalmologic observation / photographing apparatus according to claim 1, wherein when photographing and recording the data card on a film, the data card is illuminated from the front thereof to stop the light emission of the display.