JPS62208789A - Stereo photographing device - Google Patents

Abstract

PURPOSE:To observe the successive movement by using one set of a camera by disposing two stereoscopic optical paths in an optical system and providing a shutter for alternately transmitting and shielding the light flux of respective optical paths. CONSTITUTION:On the two stereoscopic observation optical paths at the rear part of an objective lens 1, Galileo variable power optical systems 2a, 2b, liquid crystal or mechanical shutters 3a, 3b are disposed, and further, an imaging lens 4 and an image pickup element 5 are commonly disposed on both the optical paths. The shutters 3a, 3b repeat an opening and a closing alternately synchronously with the frame of the image pickup element 5 by a driving circuit 5 not shown. Light passing through two optical axes 0a, 0b by a prism operation in the peripheral part of the objective lens 1 becomes to the light flux seen by both eyes of a human being. The imaging lens 4 deflects the two optical axes 0a, 0b on the image pickup element 5 according to the prism effect in the periphery and forms an image, reversely to the objective lens 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a TV photographing device for, for example, a stereoscopic microscope, and particularly to a stereo photographing device used as a stereoscopic TV device for observing stereoscopic images.

[Prior Art] A conventional stereoscopic microscope TV imaging device has an optical path for one eye.
Alternatively, a TV camera was placed on the separated optical path by dividing the optical path, and observation was performed on a monitor, or recording was performed using a VTR.

Stereo photography is extremely useful for observing irregularities on the surface of an object to be examined and the depth of the object, but with microscopes, observation is only possible with slide photographs taken with a still camera, and it is difficult to observe the movement of an object. was impossible.

On the other hand, as a stereoscopic TV observation device, two TV cameras are placed at positions corresponding to the left and right human eyes, and the observer is made to wear glasses with a light blocking function such as a liquid crystal shutter. A known method is to display a video signal alternately, for example, one frame at a time, on a monitor, and open and close the left and right shutters of the glasses in synchronization with the display for viewing. However, this known device has the disadvantage that it requires two TV cameras, which makes the device bulky.

[Object of the Invention] An object of the present invention is to provide a stereo imaging device that allows continuous movement to be observed using one camera.

[Summary of the Invention] The gist of the present invention to achieve the above-mentioned object is to provide an optical system having two optical paths for stereoscopic vision, and an optical system arranged within the two optical paths to alternately transmit and transmit the light beams of each optical path. The stereo imaging device is characterized in that it has a shutter that blocks and closes, and an optical path deflection device that guides the two optical paths to a single imaging device.

[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows a configuration diagram of the optical system of this photographing device, in which a Galileo variable magnification optical system za-2b and liquid crystal or mechanical shutters 3a and 3b are installed on two stereoscopic observation optical paths behind the objective lens 1.
are arranged, and furthermore, an imaging lens 4 and an image sensor 5 are arranged in common on both optical paths. The shutters 3a and 3b are alternately opened and closed in synchronization with the frame of the image sensor 5 by a drive circuit (not shown).

When the object to be examined is placed at the image-side focal position of the objective lens 1, light emitted from one point on the object is converted into parallel light by the objective lens 1. As shown in FIG.
The a fists 3b are passed alternately and an image is formed on the image sensor 5 by the imaging lens 4. Then, due to the prism effect of the peripheral portion of the objective lens 1, the light passing through the two optical axes Oa and Ob becomes a luminous flux similar to that seen by human eyes. Contrary to the objective lens 1, the imaging lens 4 deflects two optical paths Oa and Ob onto the imaging element 5 and forms an image thereon due to a peripheral prism effect.

FIG. 2 shows an example of application to a normal TV camera, in which variable-power optical systems 12a and 12b are installed in front of the taking lens 20 of the TV camera.
, and 13a1113b are arranged. In this case, in order to photograph a short-distance object, the variable magnification optical system 12a.
This will bring out the front group of 12b.

FIG. 3 shows an example in which a mirror and a half prism are used as optical path deflection means, and shutters 23a to 33b are provided on two optical paths behind the objective lens 21.
A mirror 26 is arranged behind the shutter 3a, and a half prism 27 is arranged behind the shutter 23b. The reflected light from the mirror 26 passes through the half prism 27.
The reflected light passes through the imaging lens 24 to the imaging device 25.
It is designed to reach.

FIG. 4 shows a device for observing the screen photographed in this way, and the image captured by the image sensor 5.15.25 is
It is displayed on the TV monitor 31. An observer puts on viewing glasses 32 and observes the screen of the TV monitor 31. glasses 3
2 is connected to a shutter drive device 33, which alternately opens and closes liquid crystal shutters 34a and 34b provided at the lens position of the glasses 32 at the same timing as when photographing.

By doing this, the observer's left and right eyes have optical axes Oa and Oa.
The images b will be incident alternately, and the object to be examined can be viewed stereoscopically. Therefore, when observing the object to be inspected in real time, the output of the image sensor may be directly output to the TV monitor 31, and when recording, it may be output from the VTR to the TV monitor 31.

[Effects of the Invention] As explained above, according to the stereo photographing device according to the present invention, unlike the conventional case of photographing with two cameras, complicated electric circuits such as video signal synthesis are not required. By simply opening and closing the shutters of the photographing device and the viewing device alternately in synchronization, stereoscopic TV photography is possible with a single image sensor.

[Brief explanation of drawings]

The drawings show an embodiment of a stereo imaging device according to the present invention,
FIG. 1 is a configuration diagram thereof, FIGS. 2 and 3 are configuration diagrams of other embodiments, and FIG. 4 is an explanatory diagram when observing a photographed image. In the figure, 1.21 is the objective lens, 2.12 is the variable magnification optical system,
3.13.23.34 is a liquid crystal shutter, 4.24 is an imaging lens, 5.15.25 is an image sensor, 20 is a photographic lens, 26 is a mirror, 27 is a half prism, 31 is a TV monitor, 32 is for observation 33 is a liquid crystal driving device. Patent applicant Canon Co., Ltd. Figure 1

Claims (1)

[Scope of Claims] 1. An optical system having two optical paths for stereoscopic viewing, a shutter disposed within the two optical paths and alternately transmitting and blocking the light flux of each optical path, and What is claimed is: 1. A stereo imaging device comprising: optical path deflection means for guiding the light to a single imaging means. 2. The stereo imaging device according to claim 1, wherein the optical path deflecting means is an imaging lens shared by the two optical paths. 3. The stereo imaging device according to claim 1, wherein the optical path deflecting means is a mirror or a half prism.