JP2007082732A - Ophthalmic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ophthalmic apparatus capable of surely cutting off the incidence of an external light on an optical system, being usable in a light room and having a high operability. <P>SOLUTION: The upper part of a support frame 6a attached with a chin rest 7 and a forehead rest is fixed with a fixed cover 10. The fixed cover 10 is attached with a movable cover 11 rotationally turning to a bottom-closed first position and an upper-opened second position. When the movable cover 11 is rotationally turned to the first position, the front part of a subject is covered with a front cover portion 11d to cut off the incidence of the external light from the front part on the optical system. The subject can rotationally turn the movable cover 11 to the second position to move the front cover portion 11d from the front part of the subject as necessary. In this state, an inspector can observe the eye part of the subject through a notch portion 10d of the fixed cover 10 and, even if using the ophthalmic apparatus in the light room, can secure the light shielded state and perform the ophthalmic measurement with reliability. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ophthalmologic apparatus, and more particularly, to an ophthalmologic apparatus provided with a light shielding cover that blocks external light from the surroundings from entering an optical system.

  Since many ophthalmologic apparatuses receive external light, ambient light becomes noise in measurement and photographing when used in a bright room. Therefore, in order to prevent this, it is conceivable to use a dark room partially, or to use a dark room partially as described in Patent Document 1 below. However, this method has a problem that it is difficult to operate because the examiner must operate the ophthalmic apparatus in the dark.

  In order to solve this problem, as described in Patent Document 2, a configuration of an ophthalmologic apparatus is proposed in which a dark curtain that covers only a subject is put on. However, in this configuration, since the examiner cannot directly see the subject, there is a problem that the state of the subject is not known, anxiety is felt, and operability deteriorates from that point. There is also a hygiene problem because the fabric of the black curtain directly touches the subject's head.

Patent Document 3 discloses a configuration of an ophthalmologic apparatus including a light shielding plate that can be switched to a state in which only the right eye of a subject is shielded, a state in which only the left eye is shielded, or a state in which both eyes are not shielded. Are listed. However, in this configuration, since the light is shielded only to the extent that improves the mydriatic state, an ophthalmic apparatus that performs measurement with weak light, for example, an ophthalmic apparatus that measures the anterior chamber protein concentration described in Patent Document 4 or the like. In some cases, light shielding is insufficient.
Japanese Utility Model Publication No. 57-60603 JP 2002-209856 A Japanese Patent Laid-Open No. 2005-6870 Japanese Patent Laid-Open No. 3-264044

  The present invention has been made in view of the circumstances as described above, and the problem is that it is possible to reliably block external light from entering the optical system from the surroundings with a simple configuration, and is used in a bright room. An object of the present invention is to provide an ophthalmologic apparatus capable of performing reliable ophthalmic measurement and having good operability.

  In order to solve the above problems, an ophthalmologic apparatus of the present invention is an ophthalmologic apparatus provided with a light shielding cover that blocks external light from the surroundings from entering the optical system. It is composed of a moving part capable of relative movement with respect to the position where the apparatus is installed in order to align the system and a fixed part other than that, and the light shielding cover is mounted on the fixed part. Features.

  According to the ophthalmologic apparatus of the present invention, it is possible to reliably block external light from entering the optical system with a configuration that can be implemented easily and inexpensively by attaching a light shielding cover to the fixed portion of the apparatus, It can be used in a bright room to perform reliable ophthalmic measurements, and has the excellent effect of improving operability.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The ophthalmologic apparatus of the present invention is, for example, an ophthalmic measurement that irradiates a subject's eye with laser light, collects and scans in the anterior chamber, analyzes scattered light from cells in the anterior chamber, and performs predetermined ophthalmic measurements. It is configured as a device (flare meter).

  1 to 4 illustrate the structure and operation related to a light shielding cover that blocks external light from the surroundings from entering the optical system. 1 and 3 are a perspective view and a side view showing a state where the movable cover constituting the light shielding cover is closed, and FIGS. 2 and 4 are a perspective view and a side view showing a state where the movable cover is opened.

  In these drawings, reference numeral 1 denotes a base of an ophthalmologic apparatus, and 2 denotes an optical system main body incorporating a configuration of an optical system and an electric circuit (not shown) of the ophthalmologic apparatus. The optical system main body 2 can be moved back and forth and right and left on the base 1 by operating an operation lever (joystick) 3 provided on the front side (examiner side) of the optical system main body 2, that is, an ophthalmic apparatus is installed. The moving part is capable of relative movement with respect to the determined position, and the movement allows the subject and the optical system to be aligned. On the front surface of the optical system main body 2, various operation buttons 4 for operating the ophthalmologic apparatus, a monitor 5 for performing various displays, and the like are provided.

  Further, a support member 6 that constitutes the fixing portion of the apparatus together with the base 1 is fixed to the back side (subject side) of the base 1 that constitutes the fixing portion of the ophthalmic apparatus. The support frame 6a in the shape of a rectangular frame is formed. And the chin stand 7 is attached to the lower end of the support frame 6a, and the forehead pad 8 is attached to the upper end. The subject places his chin on the chin table 7 and sits down with his forehead resting on the forehead rest 8, and ophthalmic measurement is performed.

  A fixed cover 10 is detachably mounted via a set screw 9 on the upper portion of the support frame 6a. The fixed cover 10 constitutes a light shielding cover 12 together with a movable cover 11 movably attached thereto. The left and right side portions 10a and 10b of the fixed cover 10 project to the left and right sides of the support frame 6a and extend downward to the center portion of the support frame 6a, and mainly shield external light from the left and right sides. . Further, the upper part 10c of the fixed cover 10 is curved in an arc shape corresponding to the shape of the forehead pad 8, and mainly shields external light from the upper part. Further, a notch 10d (FIG. 2) is formed in the rear portion of the fixed cover 10, and the front portion of the fixed cover is open, so that when the movable cover 11 is rotated upward, The examiner can visually recognize (observe) the eye part of the subject who sits with the chin resting on the chin stand 7 by applying the forehead to the forehead pad 8 through the notch 10d.

  Further, as shown in FIG. 2, the fixed cover 10 is provided with bearing portions 10 e and 10 f and receives a shaft 11 e provided on the movable cover 11. As a result, the movable cover 11 can be turned up and down about the shaft 11e as the center of rotation. The movable cover 11 is closed at the lower position shown in FIGS. 1 and 3 and at the upper side shown in FIGS. It can be turned to the opened second position.

  The movable cover 11 is locked at the first and second positions by a locking structure (not shown) or friction, and the locking is released by applying a force of a certain level or more. Alternatively, it is preferable to be able to rotate from the second position to the first position.

  Further, the movable cover 11 is slightly larger in width than the fixed cover 10, and the left and right side portions 11 a and 11 b of the movable cover 11 are located on the fixed cover 10 in the first position shown in FIGS. 1 and 3. It arrange | positions so that it may overlap with the right-and-left both sides 10a and 10b. External light from the side is shielded by the side portions 11a and 11b of the movable cover 11, and external light from the top is shielded by the upper portion 11c of the movable cover. Further, the front cover portion 11d of the movable cover 11 is slightly inclined with respect to the upper portion 11c, and is close to the upper portion of the optical system main body portion 2 when in the first position. Therefore, when the movable cover 11 is in the first position, the front portion of the subject is covered by the front cover portion 11d of the movable cover 11, and external light from the front portion of the subject is shielded.

  In addition, the light shielding cover 12 including the fixed cover 10 and the movable cover 11 can be arbitrarily mounted by attaching or detaching the fixed cover 10 with respect to the upper portion of the support frame 6 a via the set screw 9.

  When performing predetermined ophthalmic measurement (flare measurement) using the ophthalmologic apparatus having the above-described configuration, the subject places his chin on the chin base 7 and sits on the forehead 8 against the forehead. On the other hand, the examiner rotates the movable cover 11 to the first position closed downward shown in FIGS. The movable cover 11 covers the upper part of the optical system main body 2, and external light from the upper part is shielded by the upper part 10c of the fixed cover 10 and the upper part 11c of the movable cover 11, and the side parts 10a, 10b of the fixed cover 10 are blocked. External light from both the left and right sides is blocked by the side portions 11a and 11b of the movable cover 11, and external light from the front portion of the subject is blocked by the front cover portion 11d of the movable cover 11. On the other hand, since the external light from the upper part, the rear part, or the bottom part is shielded by the subject's own head, the space around the eye part of the subject is almost in a dark room state. Therefore, external light from the surroundings can be substantially blocked from entering the optical system, and reliable ophthalmic measurement can be performed. Accordingly, since the ophthalmic apparatus originally used in the dark room can be used in the bright room, the operability of the ophthalmic apparatus can be improved, and reliable ophthalmic measurement can be performed without mixing external light.

  Further, the examiner can rotate the movable cover 11 to an upper position as shown in FIGS. 2 and 4 as necessary. At this time, as shown in FIG. 2, the front cover portion 11 d of the movable cover 11 moves upward and lifts, so that the front portion of the subject is uncovered, and the examiner removes the notch of the fixed cover 10. The face of the subject, particularly the eye part, can be observed through the part 10d. Although the light shielding property of the front part is slightly worsened by the fact that the front part of the subject is not covered, it is necessary for adjustments required before measurement (for example, alignment of the optical system main body 2 and the eye to be examined). Therefore, adjustment is performed while confirming the state of the subject while ensuring the light shielding state. Then, by returning the movable cover 11 to the first position again immediately before the measurement, the measurement can be easily performed and the ophthalmic measurement can be performed with reliability.

  Note that the second position described in this specification does not have to be one place, and the movable cover 11 is rotated and locked to a plurality of positions or continuous positions so that the examiner can It is desirable that the movable cover can be locked at an arbitrary position so that the light shielding state can be adjusted by judgment.

  Further, the movable cover is not limited to the rotating type as shown in the present embodiment, and a system in which the movable cover is slid and moved is also conceivable.

  Further, the attaching / detaching mechanism between the fixed cover 10 and the support frame 6a may be a magnet or a roller catch as well as a set screw.

  FIG. 5 is an external perspective view for explaining another embodiment of the ophthalmologic apparatus. In FIG. 5, portions common to or corresponding to those in FIGS. 1 to 4 of the first embodiment are denoted by common reference numerals, and description of the common portions is omitted.

  In the ophthalmologic apparatus shown in FIG. 5, the upper surface of the fixed cover 10 and the movable cover 11 becomes a substantially uniform plane in a state where the movable cover 11 is rotated to the first position closed in the illustrated direction. Yes.

  A plurality of dark curtains 13 made of paper are placed on the upper surfaces of the fixed cover 10 and the movable cover 11 and attached to a ring-shaped attachment member 14 provided on the upper surface of the fixed cover 10.

  A plurality of dark curtains 13 attached in a stacked manner can be picked up one by one from the top as shown by a one-dot chain line, and can be used for light shielding by hanging from the upper side of the subject's head to the back of the head. The use of the dark curtain 13 further improves the light shielding performance as compared with the first embodiment.

  Moreover, since the dark curtain 13 is paper, it can be torn off after use and easily removed. That is, every time the subject changes, the used black curtain 13 can be broken and a new clean black curtain 13 can be used one by one, which is hygienic.

  If the area of the upper surface of the light shielding cover is small and the black curtain 13 is unfolded, if it cannot be stored, it is folded and attached to the light shielding cover so that it is spread and used during use.

  Of course, the black curtain 13 is not limited to paper but may be made of other materials such as cloth or plastic film.

It is a perspective view which shows the external appearance of the state which closed the movable cover which comprises the light shielding cover in the ophthalmologic apparatus of Example 1 of this invention. It is a perspective view which shows the external appearance of the state which opened the movable cover in the ophthalmologic apparatus. It is a side view which shows the state which closed the movable cover in the ophthalmologic apparatus. It is a side view which shows the state which opened the movable cover in the ophthalmologic apparatus. In the ophthalmologic apparatus of Example 2, it is a perspective view which shows the external appearance of the state which piled up and attached the several dark curtain on the light-shielding cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Optical system main-body part 3 Operation lever 4 Operation button 5 Monitor 6 Support member 6a Support frame 7 Jaw stand 8 Forehead support 9 Set screw 10 Fixed cover 11 Movable cover 12 Light-shielding cover 13 Dark curtain 14 Mounting member

Claims (6)

  An ophthalmic apparatus provided with a light shielding cover that blocks external light from the surroundings from entering the optical system, and the ophthalmic apparatus is located at a position where the apparatus is installed in order to align the optical system with a subject. An ophthalmologic apparatus comprising a moving part capable of relative movement and a fixing part other than the moving part, wherein the light shielding cover is attached to the fixing part.   The ophthalmic apparatus according to claim 1, wherein the light shielding cover is attached to an upper portion of a support frame to which a chin stand and a forehead pad are attached.   The ophthalmologic apparatus according to claim 2 or 3, further comprising a detaching mechanism that allows an examiner to arbitrarily attach the light shielding cover.   The ophthalmic apparatus according to any one of claims 1 to 3, wherein a usable dark curtain covering the head of the subject is attached to the light shielding cover.   The light shielding cover includes a fixed cover including a mounting portion to be attached to the ophthalmologic apparatus, and a movable cover movable to the first and second positions with respect to the fixed cover, and is shielded by moving the movable cover. The ophthalmologic apparatus according to claim 1, wherein the state can be changed.   When the movable cover moves from the first position to the second position, the cover portion that covers the front of the subject at the first position moves from the subject, and the examiner examines the subject. The ophthalmic apparatus according to claim 5, wherein a person can be visually observed.

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