JPH11290276A - Observation device - Google Patents

Abstract

(57) [Problem] To simplify the configuration around an eyepiece, secure a space between the eyepiece and the observation eye, and shorten the observation optical path. SOLUTION: A target light source 16 is presented to an observer eye eL,
The pupil image at this time and the infrared LED light source 9 make the observer's eye
The gaze direction is calculated from the relative positional relationship with the corneal reflection image 9 'generated in eL, and the video camera 11 corresponding to the gaze direction is calculated.
The focus of the observation optical system and the eye E is detected by using the signals of (1) and (2).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an observation apparatus which can be applied to an autofocus type surgical microscope and the like.

[0002]

2. Description of the Related Art Conventionally, a microscope for automatically focusing on a subject located in a line of sight in a visual field is disclosed in Japanese Patent Laid-Open No. Hei 5-199996, and a device for detecting the line of sight using corneal reflected light. Is also known.

[0003]

However, in the apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 5-199996, the observer has his or her hands blocked because of the operation, and the focus adjustment of the microscope is performed in this state. This is difficult to perform, and there is a problem that diopter correction cannot be performed with a device that detects the direction of the line of sight by corneal reflected light.

An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide an observation device that can automatically focus on the direction of a line of sight.

It is another object of the present invention to provide an observation apparatus which includes an eyepiece capable of adjusting diopter and detects a line of sight.

[0006]

According to the present invention, there is provided an observation apparatus for observing an object through an observation optical system for observing a subject and a light splitting member provided in an optical path of the observation optical system. A first imaging unit that images the subject; and a second imaging unit that captures an image of the observation eye via the light splitting member. The direction of the line of sight of the observation eye is determined by a signal from the second imaging unit. A focus signal of the observation optical system is obtained from a video signal of the first imaging unit which is detected and indicated by a line of sight of the observation eye.

An observation apparatus according to the present invention comprises: an observation optical system for observing a subject; imaging means for imaging the subject via a light splitting member provided in an optical path of the observation optical system;
And a projecting means for projecting a target light beam to an observation eye via the light dividing member.

[0008] An observation device according to the present invention is an observation device provided with an objective lens, wherein an eyepiece whose diopter is adjustable is provided;
A light source provided at the outer periphery of the eyepiece so as to be variably positioned in the optical axis direction, wherein a gaze direction is detected from a corneal reflection position of the light source.

An observation apparatus according to the present invention is an observation apparatus provided with an eyepiece capable of correcting diopter and detecting a direction of a line of sight at a corneal reflection position. And a telescopic or electrically conductive member provided on the lens barrel of the eyepiece.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows a plan view of an optical system of an operating microscope, and an optical path O1 from an objective lens 1 to observer eyes eL and eR.
On L and O1R, the variable power lenses 2L and 2R and the imaging lens 3
L, 3R, normal image prisms 4L, 4R, eyepiece 5L,
5R are sequentially arranged, and an illumination light source 6 for emitting visible light and a lens 7 are obliquely provided near the objective lens 1. A light splitting prism 8 in which two prisms 8a and 8b are bonded to each other is disposed in the light flux parallel portion of the variable power lens 2L and the imaging lens 3L on the optical path O1L for the left eye, and the line of sight is detected near the outer periphery of the eyepiece 5L. Infrared LED light source 9 is disposed.

An optical thin film that partially reflects and transmits visible light and reflects near-infrared light is provided on the bonding surface of the light splitting prism 8. An image lens 10 and a video camera 11 that is an imaging unit of the eye E are arranged. In addition, on the upper optical path O2, a light splitting member 12 for separating visible light and infrared light, a lens 13, and an imaging unit 14 for picking up an image of the anterior eye of the observer's eye eL are arranged. A lens 15 and a target light source 16 composed of three LEDs arranged in a predetermined direction for calibrating the line of sight are arranged on the optical path O3 in the direction.

FIG. 2 is a block diagram of the control system. The output of the video camera 11 is connected to an arithmetic control unit 17 and a video recorder 18 as recording means, and the output of the imaging unit 14 is connected to the arithmetic control unit 17. The output of the arithmetic control unit 17 is connected to the infrared LED light source 9, the optotype light source 16, the video recorder 18, and the focusing drive unit 19.

The illumination light source 6 is connected to the eye E through a lens 7.
And the observer's eyes eL and eR are the objective lens 1, the variable power lenses 2L and 2R, the imaging lenses 3L and 3R, and the normal image prism 4.
The eye E is observed through the eyepieces L, 4R and the eyepieces 5L, 5R. The luminous flux reflected from the subject's eye E through the left-eye optical path O1L and reflected by the light splitting prism 8 is passed through the lens 10 to the video camera 1
An image of the eye to be inspected is formed on the subject 1. The output signal of the video camera 11 is sent to the arithmetic and control unit 17 and used for focus detection and recorded on the video recorder 18 for use in recording surgery.

The target light source 16 is turned on sequentially, and the light flux from the target light source 16 is transmitted through the lens 15 and the light splitting member 1.
2. The target beam is projected through the light splitting prism 8 from the direction of the optical path O1L to the observer's eye eL as shown in FIG. Furthermore,
A light beam is emitted from the infrared LED light source 9 to the observer's eye eL, and a corneal reflection image 9 'of the infrared LED light source 9 is generated on the cornea C. The reflected light from the anterior segment of the observer's eye eL returns to the optical path O1L, is reflected by the light splitting prism 8, passes through the light splitting member 12, passes through the lens 13, and forms a pupil and a corneal reflection image 9 '. An image is formed on the imaging means 14.

The signal from the image pickup means 14 is analyzed by the arithmetic and control unit 17. When the observer's eye eL sequentially looks at each of the optotype light sources 16, the relative positional relationship between the pupil and the corneal reflection image 9 'is obtained, and a calibration value in the line of sight is obtained. Using this value, it is possible to know which position of the eye E to be observed by the observer's eye eL. Therefore, focus detection is performed using the signal of the video camera 11 corresponding to the line of sight, and the obtained focus signal is obtained. The arithmetic and control unit 17 drives the focusing drive unit 19 based on the equation (2) to change the distance between the observation optical system and the eye E to perform focusing.

As described above, the positional relationship between the direction of the line of sight and the corneal reflection image 9 'can be calibrated from the information on the corneal reflection image 9' of the pupil and the observer's eye eL. The gaze direction can be detected. Also, a light source 1 for a target
At the position of the target 6, the fact that the video camera 11 is recording is displayed as shown in FIG. 4 to notify the observer. By projecting this type of display using the light splitting prism 8, a message can be presented directly to the surgeon who is the observer without lengthening the optical path.
In this case, since the video camera 11 for recording can be used for both line-of-sight detection and automatic focusing of the line-of-sight direction, and line-of-sight detection can be performed via the light splitting prism 8 inserted in the parallel light beam part, an existing surgical microscope must be used. Can be.

FIG. 5 is a cross-sectional view of an eyepiece for the left eye, in which a conductive member 2 is placed in a lens barrel 20 that holds the eyepiece 5L.
The infrared LED light source 9 is fixed to an end of the lens barrel 20 on the observation eye eL side. A spring 22 made of the same member as the conductive member 21 is provided at an end of the conductive member 21 on the main body side.
The spring 22 is in contact with another conductive member 24 disposed on the member 23. A cylindrical member 26 is screwed to the outside of the lens barrel 20 via a screw portion 25.
By rotating the cylindrical member 26, the lens barrel 20 is moved in and out together with the eyepiece 5L to perform diopter correction.

During the diopter correction, the conductive member 21 and the conductive member 24 are kept in contact with each other via the spring 22.
Is provided with a rotation stopper (not shown) so that the lens barrel 20 does not rotate when rotated. The member 23 and the cylindrical member 26 are adapted to slide with respect to each other.
Is provided with a spring 27 and a pin 28. The eyepiece is fixed to the mount 30 by a screw member 29 so that the tip of the pin 28 contacts the contact 31 on the mount side.

When the eyepiece is mounted on the mount 30, the tip of the pin 28 and the contact 31 come into contact and are electrically connected. An electric current is supplied from a power source provided on the main body side via a contact 31, and the pin 28, the spring 27, and the conductive member 2
4. The infrared LED light source 9 is turned on through the spring 22, the conductive member 21. The viewer observes the lens barrel 20 together with the eyepiece 5L.
To adjust the diopter.

FIG. 6 is a cross-sectional view of a modification of the eyepiece section. The eyepiece section is provided with an extendable light guide member. The light guide member includes light guides 32 and 33 made of cylindrical glass or the like and a tubular member 34 having a mirror-finished inner surface. When the eyepiece is fixed to the mount 30, the end surface of the light guide 32 is mounted on the mount 30. The end face of the light guide 35 on the side 30 is arranged close to the end face. The tubular member 34 is attached to the member 23 of the eyepiece section, the light guide 33 is attached to the lens barrel 20, and the end 36 of the light guide 33 is a secondary light source.

FIG. 6A shows a state where the light guide 33 is extended, and FIG. 6B shows a state where the light guide 33 is contracted. A light source (not shown) provided in the main body guides a light beam to the light guide 35, and , 33, and is radiated from the end 36 of the light guide 33 to the observer's eye eL. As the barrel member 26 is turned and the lens barrel 20 is retracted, the light guide 33 enters the tubular member 34, and the light guide from the light source of the main body to the secondary light source is held.

It should be noted that the electric contact 31 shown in FIG.
In this case, if the optical contact is made removable, the eyepiece unit can be made removable from the main body. Further, the infrared LED light source 9 may be attached to the outside of the eyepiece tube so that the position in the optical axis direction can be adjusted.

[0023]

As described above, the observation apparatus according to the present invention can automatically focus in the direction of the line of sight with simple calibration by using the video signal for recording of the first imaging means for line of sight detection. Become.

In the observation apparatus according to the present invention, a light splitting member is provided in the parallel light beam portion of the observation optical system to split the imaging optical path of the subject and the target projection optical path to the observation eye.
The gaze can be detected with an existing surgical microscope.

The observation apparatus according to the present invention detects the line of sight by corneal reflection of a light source provided at the outer periphery of the eyepiece so as to be variably positioned in the optical axis direction. Detection becomes possible.

The observation device according to the present invention is provided by providing an extendable conductive or light-guiding member in the lens barrel of the eyepiece.
The eyepiece can be easily removed and the functionality is improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an optical system according to an embodiment.

FIG. 2 is a configuration diagram of a control system.

FIG. 3 is an explanatory diagram of a target visual field.

FIG. 4 is an explanatory diagram for notifying that recording is in progress;

FIG. 5 is a cross-sectional view of an eyepiece.

FIG. 6 is a cross-sectional view of a modification of the eyepiece.

[Explanation of symbols]

 4L, 4R Normal image prism 6 Illumination light source 8 Light splitting prism 9 Infrared LED light source 11 Video camera 14 Imaging means 16 Light source for visual target 18 Video recorder 19 Focus driving means 20 Lens barrel 21, 24 Conductive member 26 Tube member 30 Mount 32, 33, 35 Light guide 34 Tubular member

Claims (4)

[Claims] 1. An observation optical system for observing a subject, a first imaging unit for imaging the subject via a light dividing member provided in an optical path of the observation optical system, and And a second imaging unit for imaging the observation eye by detecting an eye direction of the observation eye based on a signal of the second imaging unit, and a video signal of the first imaging unit indicated by the eye direction of the observation eye. An observation apparatus that obtains a focus signal of the observation optical system from the apparatus. 2. An observation optical system for observing a subject, imaging means for imaging the subject via a light splitting member provided in an optical path of the observation optical system, and an observation eye via the light splitting member. And a projecting means for projecting a target light beam onto the object. 3. An observation device having an objective lens,
An observation apparatus comprising: an eyepiece whose diopter is adjustable; and a light source provided at an outer periphery of the eyepiece so as to be variable in an optical axis direction, and detects a gaze direction from a corneal reflection position of the light source. 4. An observation apparatus comprising an eyepiece capable of correcting diopter and detecting a direction of a line of sight at a corneal reflection position, wherein a light source for illumination of an observation eye provided on an observation eye side of the eyepiece, and a lens barrel of the eyepiece An observation device, comprising: a telescopic conductive or light-guiding member provided in the device.