JPH04200438A - fundus camera - Google Patents

Abstract

PURPOSE:To facilitate a switch between stereoscopic photography or normal photography of eyegrounds by integrating a stop means of a mobile stage of eyeground camera and a moving view regulating means to achieve lower costs and a space saving. CONSTITUTION:With a friction section 12c at the tip of a substrate stopper 12 being separated from a fixed stage 1, a mobile stage 3 can move freely with respect to the fixed stage 1. When the friction member 12c at the tip is pressed on the fixed stage 1 by turning a multi-thread screw 12b with a lever 12a, a substrate 11 is fixed on the fixed stage 1. As a tapered-part 14a of a switch shaft 14 is fitted firmly into a angular hole 13, the mobile stage gets unmovable with the substrate 11, hence at rest on the fixed stage 1. Then, the multi-thread screw 14c of the switch shaft 14 is turned to raise the switch shaft 14 so that a parallel part 14b is positioned within the angular hole 13. Thus, an eyeground camera body 5 is allowed to move parallel sideways by a distance (d) with respect to the fixed stage 1 and an eye E to be inspected thereby enabling stereoscopic photographing of the eyegrounds.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a fundus camera capable of taking stereoscopic photographs of the fundus.

[Prior Art] One method of three-dimensionally photographing the fundus of an eye to be examined using a fundus camera is to capture images through a first area of the pupil of the eye to be examined and a second area translated by an appropriate distance. Being photographed 2
It is known to take a set of photographs. Also, 1
A fundus camera that takes stereoscopic photographs using a method such as
This method is disclosed in Japanese Patent Application Laid-open No. 9838, Japanese Patent Application Laid-open No. 118729/1983, and the like.

[Problem to be solved by the invention] However, in these conventional fundus cameras,
Although it is possible to regulate the amount of stage movement within the stage,
Furthermore, the stage cannot be stopped. Therefore, in order to stop the stage, a separate stopping device must be provided, which not only increases the cost but also requires extra space, and the operation system is separate. It also has problems such as being troublesome.

An object of the present invention is to solve the above-mentioned problems, and by integrating a stop means for a movable stage of a fundus camera with a movement amount regulating means, it is possible to reduce costs and save space, and to adjust the position of the fundus as necessary. To provide a fundus camera with good operability that can easily switch between stereoscopic photography and normal photography.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the fundus camera according to the present invention, a movable stage that can be slid forward, backward, left and right is provided on a fixed stage, and the fundus camera is mounted on the movable stage. In a fundus camera equipped with a main body, a substrate is attached to the movable stage so as to be slidable laterally within a certain range;
a substrate stopper that keeps the substrate stationary relative to the fixed stage; and a substrate stopper that is connected to the movable stage through a hole drilled in the substrate, so that the movable stage and the substrate are in a locked state or in a state in which they are movable by a regulated distance. The invention is characterized in that it includes a switching means for switching.

"Function" In the fundus camera having the above configuration, if the movable stage is fixed to the fixed stage by the substrate stopper and the movable stage and the board of the function switching device are locked, the function switching device functions as a stage stopper, and the function switching device functions as a stage stopper. The stage becomes movable in the lateral direction by a predetermined distance relative to the fixed stage, making it possible to take a stereoscopic photograph of the fundus.

[Example] The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a partially sectional side view, and FIG. 2 is a plan view thereof. A movable stage 3 is arranged on the fixed stage 1 and is slidable in the X and Y force directions guided by two linear motion rails 2a and 2b, and a face holder 4 is provided in front of the movable stage 3.

Further, a retinal camera body 1 is mounted on the movable stage 3 so as to be movable up and down, and by operating an operation stick 6, the fundus camera body 5 can be moved arbitrarily in forward, backward, leftward, rightward, and upward and downward directions. This is the same as in the conventional device. It should be noted that the movable stage 3 is capable of both coarse and fine movements by means of a well-known mechanism (not shown) of the operating rod 6. When taking a stereoscopic photograph of the fundus, as shown in FIG. 2, the fundus camera body 5 is moved parallel to the fundus of the subject's eye E by an appropriate distance degrees Celsius to take a set of two photographs. A function switching device 10 is provided on the movable stage 3, which has a function of regulating the parallel movement distance i and a function of temporarily stopping the movable stage 3.

3 and 4 show the operating state of this function switching device 10, and FIG. 5 is a plan view of the third section as seen from the direction AA. This function switching device 10 includes a substrate 11 placed on a movable stage 3, a substrate stopper 12 screwed onto the substrate 11.
A square hole 13 made in the substrate 11, a switching shaft 14 screwed to the movable stage 3 through the square hole 13, and a switching shaft 14 screwed into the movable stage 3 through the square hole 13, and the substrate 11 is moved horizontally in the B direction in FIG. 5 within a certain range with respect to the movable stage 3. Stepped screw 15 installed so that it can be moved in the direction
, is provided with a long diameter 16 for guiding the stepped screw 15. The substrate stopper 12 is for fixing the substrate 11 and the movable stage 3 to the fixed stage 1, and includes a lever 1.2a, a multi-thread screw 12b, and a friction member 12c. Further, the switching shaft 14 is connected to the substrate 11 and the movable stage 3.
It is a means for switching between a locked state and a movable state, and has a tapered portion 14a and a multi-thread screw 14c.

In the state shown in FIG. 3, the friction portion 1 at the tip of the substrate stopper 12
．． 2c is apart from the fixed stage 1, the movable stage 3 can freely move relative to the fixed stage 1. Now, from the state shown in FIG. 3, when the multi-thread screw 12b is turned by the lever 12a of the substrate stopper 12 and the friction member 12c at the tip is pressed against the fixed stage 1, the substrate 1
1 is fixed to a fixed stage 1. At this time, since the tapered portion 14a of the switching shaft 14 is firmly fitted into the square hole 13, the movable stage 3 is moved relative to the substrate 11.
It is not possible to move, and is in a stationary state with respect to the fixed stage 1. In this state, the function switching device 10 is connected to the movable stage 3.
Temporary stop device for 1-7
It works.

Next, as shown in FIG. 4, the multi-X screw 14e of the switching shaft 14 is
When the switching shaft 14 is raised by turning 1) so that the eastward portion 14b is completely placed in the square hole 13), the movable stage 3 is moved up as shown in the 5th section. moves in the B direction by a distance d with respect to the substrate 11 in a convex manner, and the parallel movement distance d is regulated as shown below. t:, shi, l,
is the length of one side of the square hole 13, and ■) is the parallel part 1 of the switching shaft 14.
4F) direct line! I'm 7.

ci = T-, ~D That is, the fundus camera main body 5 is in a state where it can be moved in parallel by a distance d in the lateral direction with respect to the fixed stage 1 and the eye to be examined 1, making it possible to take a 1'i-body photograph of the fundus. Eight. In history,
By changing the straight part 14b of the switching shaft 14 in multiple stages, or by changing the straightness of the Te part 14b, the adjustment can be made depending on the pupil diameter of the eye to be examined, imaging conditions, etc. -) to change the parallel movement distance d, the function becomes (i).In this way, by selecting the functions of switching axes 1 and 4, the function as a stay support collar and the function of -j body photography can be changed. Both functions can be satisfied by the same operation of substrate stopper 1:).

6th [21 is a small version of the second embodiment, in this case: this switching request 21 is made by the = l-il spring 22) when it is rich], when it is in the air, when it is in the hands, and when it is normally turned off. be in a state of -).

The bin 23 is attached to the switching shaft 2 and the first bar is
::2 ”4 Disc cam rotated by V 3?b
2: Raise and place the 3 on the +, and lift the switching shaft 21 with the coil spring 2 and the spring 11 of the coil spring 2.
This means that the device is ii'J gravitational starvation.

711aL shows the third embodiment - 1 In this case: ; ↓ The switching shaft 26 is always pressed against the tension spring 27 (,'' To direction: J'' is biased 1-7 and the opening is in the pivoting state at the first moment. Ok, must be 8!i-1
, - Switching shaft 2 ← ζ
The disc cam 30 rotates and rotates with one push to switch between IJ and IJ.

[Effect of the invention 1 As explained above, the garden turtle according to the present invention integrates the mechanism for regulating the movement distance of the movable stage and the temporary stop mechanism of the movable stage. There is an advantage in that the cost can be lowered and the space taken up is smaller than that of conventional devices. It also has the effect of allowing an easy transition from alignment during f-5 fundus photography to stereoscopic photography. Furthermore, it can be adjusted according to the operator's collar level and preferences! 2. Changed the method of 3D photography. It is possible to take a variety of single-body fundus photographs by selecting individual differences between subjects and photographing conditions.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the fundus camera according to the present invention, and FIG. 1 is a side view of the fundus camera to which the present invention is applied, and FIG. Section 4 is an explanatory diagram of the operation of the function switching device,
Fig. 5 is a plan view of No. 3 as seen from the direction of A-, 6th ward,
FIG. 7 is a sectional view of each other embodiment. 1 is a fixed stage, 3 is a movable stage, 4 is a face holder, 5 is a bottom camera body, 10 is a function switching device, 11 is a board, 12 is a board stopper, 13 is a square hole, 14.21.
26 is the switching shaft, 15 is the stepped screw, ]← Long hole, 22
(''ko1'l [spring, 2:3, Niji8 is a bottle, 24.2
9 is the bar, 2F), 30 is the tl] board cam,? 7 is a tension spring). Patent applicant ・〜Y5NO5 Co., Ltd. agent Patent attorney t] Ftani ([l
: Hiko -]□□ 1 Fig. 1 2a Fig. 2 14''1' 3 4b

Claims (1)

[Claims] 1. In a fundus camera in which a movable stage that can slide back and forth and left and right is provided on a fixed stage, and a fundus camera body is mounted on the movable stage, the movable stage can be moved laterally within a certain range with respect to the movable stage. a slidably mounted substrate, a substrate stopper that stops the substrate relative to the fixed stage, and a substrate stopper connected to the movable stage through a hole drilled in the substrate;
A fundus camera characterized by comprising: switching means for placing the movable stage and the substrate in a locked state or in a state in which they are movable by a regulated distance. 2. The fundus camera according to claim 1, further comprising means for changing the movable range of the substrate relative to the movable stage.