JPH02251810A - Stereoscopic image forming optical device - Google Patents

Abstract

PURPOSE:To eliminate the need for readjustment such as focus adjustment, etc., even if photograph size is varied by reflecting the observation line of slight from a stereoscopic image by a 1st mirror and guiding the observation line of sight which is reflected by the 1st mirror 1 to an image forming lens part by a second mirror, and thus forming a stereoscopic image. CONSTITUTION:The 1st mirror 200 reflects the observation line of sight from the stereoscopic image, and the 2nd mirror 300 guides the observation line of sight which is reflected by the 1st mirror 200 to the image forming lens part 61, which forms the stereoscopic image. The 1st mirror 300 is supported rotatably on a 1st center of rotation and the 1st mirror 200 can be moved along a parabola having its focus at the 1st center of rotation associatively with the 2nd mirror 300. Further, marker parts 21 and 22 are arranged in the array direction of a couple of image forming lens parts 61 and those marker parts 21 and 22 can be constituted at equal- distance intervals closely or distantly. Consequently, even when the photograph size is varied, the image formation distance becomes invariably constant and the handling is made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stereo image forming optical system that calculates the position and height of a stereoscopic image taken in a stereo image by stereoscopically viewing a set of stereo images. In particular, 'J4
This invention relates to an optical character device for forming a single stereo image in which the imaging distance is kept constant even when stereo photographs of different sizes are used.

``Prior Art J'' A conventional stereo image forming optical device uses a reflective stereoscopic mirror 1000 as shown in FIG. It was constructed so that each was bent at right angles with a prism and a stereo image was formed with an eyepiece.

After fixing a set of stereo photographs, a stereoscope was moved to perform stereoscopic vision of the eyesight9.Furthermore, parallax was measured using a parallax measuring tube, and relative height was measured. 9
``Setup point to be solved by the invention'' However, with the conventional reflective stereoscope described above, when performing stereoscopic viewing of a different photographic size, it was necessary to make new settings. In addition to having to repeatedly adjust the focus according to the size of the photo, the viewing conditions also change, making it extremely difficult to handle.Especially stereoscopic viewing requires skill, so readjustment is repeated. There was a gap between the points that placed an unnecessary burden on the user, increased fatigue, and caused measurement errors. Therefore, there has been a strong desire for a stereo image forming optical device that is easy to handle and has a constant imaging distance even when the photo size is changed.

"Means for Solving the Problems" The present invention has been devised in view of the above problems, and includes: - a pair of first mirrors to be disposed facing a pair of stereo images; an imaging optical system consisting of a pair of second mirrors that guide the light flux from the pair of second mirrors to a pair of coupling lens parts, and a pair of imaging lens parts that receive the light flux from the pair of second mirrors and form a stereo image. In the stereo image forming optical device, the second mirror is rotatably supported around a first rotation center, and the first mirror works in conjunction with the second mirror to focus on the first rotation center. Further, in the present invention, a pair of marker parts are arranged in the direction in which the pair of imaging lens parts are arranged. The marker portions are characterized in that they are configured to be able to approach or separate from each other at equal distances.

"Operation" In the present invention configured in the above-mentioned shape, the first mirror reflects the observation line of sight from the stereo image, and the second mirror reflects the observation line of sight from the stereo image.
The observation line of sight reflected by the mirror is guided to the imaging lens section,
This imaging lens section forms a stereo image. The second mirror is rotatably supported around the first center of rotation, and the first mirror, in conjunction with the second mirror, is shaped approximately into a parabola with the first center of rotation as its focal point. It can be moved along.

Alternatively, the marker portions may be arranged in the direction in which the pair of imaging lens portions are arranged, and the marker portions may be configured to be close to each other or spaced apart from each other at equal distances.

"Principle of the present invention" The principle of the present invention will be explained based on FIG. 5. Figure 5 (a
) shows the configuration of the present invention and the optical path of the observation line of sight,
The present invention provides a stereo photograph 100 and a first mirror 200.
, a second mirror 300 , and an eyepiece 400 . Then, the eyepiece 400 and the second mirror 3
00 is Ql, the distance between the second mirror and the first mirror is Q2, and the distance between the first mirror and the stereo photograph is Ji. In order to keep the focus adjustment, observation conditions, etc. constant regardless of the photo size, it is necessary to keep the imaging distances la, +a, +t3 constant regardless of the photo size. Therefore, As shown in FIG. 5(b), it is necessary to move the first mirror 200 along a parabola. That is, it is necessary to move the first mirror 200 to a position that satisfies LL'+L2'=L1"+L2"=LL"+L2" =L1r1+L2n.As the first mirror 200 moves, the second It is necessary to adjust the second mirror 300 to be parallel to the first mirror by changing the inclination angle of the mirror 300.9 Here, the parabola along which the first mirror 200 should move, and the second The rotation angle θ of the mirror 300 will be discussed based on FIG.

First, as shown in Figure 6(a), the vertex of the parabola is 13iJ
When set at point J1, this parabola can be expressed as y2 = 4ax (1). Here, the height of the second mirror 300 is h, and when the height h is reached, the first mirror 20
0 and the second mirror 300 is assumed to be Ll. At this time, a and X are.

a=L1. , /'2, X= (-Ll, /'2)+
It is given by h. Therefore, the y coordinate, which is the intersection of the reference plane and the parabola, is as follows. The directional angle 2θ□ is given by: ・ ・ ・ (3) 2θ1 = 90° + cot” − ・ ・ ・ (2)

Furthermore, the rotation angle θ of the second mirror 300 will be considered based on FIG. 6(b). First, with the vertical line as a reference, the direction angle from the second mirror 300 to the first mirror 200 is set to 2θ1. Then, if the distance from the origin to the first mirror 200 is b, then =90° +t, an-1□ That is, the normal direction θ of the second mirror is y2=4・(Ll,/2)・b ・ ・ ・ (4)

"Five Practical Examples" Examples of the present invention will be described based on the drawings. As shown in FIG. 1, the stereo image forming optical character device 1 of this embodiment includes a right cursor section 21, a t-cursor section 22, a cursor drive section 23, a telescopic arm 33, 33, and a first Mirror 200.200.

First pantograph 210, 210 and second mirror 3
00,300, the second pantograph 310.310, the parabolic member 4.4, the rail member 5, and the eyepiece 6.6.
It is composed of. The good cursor section 21 and the left cursor section 22 correspond to marker sections, and are provided with a finger for measuring the parallax difference and finding the relative height. The right cursor section 21 and the left cursor section 22 are configured to be slidable on the rail member 5 by an appropriate moving mechanism. Cursor driven? J23 is for moving the right cursor section 21 and the left cursor section 22. This cursor driving section 23 includes a right cursor section 21 and a left cursor section 22.
The cursor drive unit 23 can move f! ! Qing is also provided. The telescoping arm 3.3 comprises a first telescoping arm 31.31, a second telescoping arm 32.32 and a third telescoping arm 33.
．． It consists of 33. This telescoping arm 3 is for moving the first mirror 200 along the parabolic member 4, and the first telescoping arm 31 is for moving the first mirror 200 in the horizontal direction. . The second telescopic arm 32 supports the first mirror 200 and can move the first mirror in the vertical direction. Furthermore, the third telescoping arm 33
This is for moving the mirror 200 in the vertical direction. The lower end portions of the second offshore transportable arms 32, 32 are rotatably fixed by a rotation shaft 71 formed approximately at the center of the rail member 5.

The rotation fulcrums of this pair of second telescopic arms 32, 32 are both rotational shafts 71, and the second telescopic arms 32, 32 cannot be rotated around the rotational shaft 71. can. The upper end of the second telescoping arm 32 is
The first telescopic arm 31 is rotatably fixed by a rotation shaft 72 formed on the first telescopic arm 31 so as to be rotatable once. A pair of second telescoping arms 32.32 are articulated by a third pantograph 330. The third pantograph 330 is rotatably attached to an opening 340a provided in the vertical direction of the support part 340 fixed in the vertical direction, and the third pantograph 330 is rotatably attached to the opening 340a provided in the vertical direction of the support part 340 fixed in the vertical direction. The telescoping arms 32, 32 are regulated to open and close at equal angles. Note that the first pantographs 210, 210 and the second pantographs 310 and 310 also have the same configuration as the third pantograph 330. One lower end of the third telescopic arm 33 33 is fixed to the right cursor section 21 , and the other lower end is fixed to the left cursor section 22 . The upper end of the third telescopic arm 33 is rotatably fixed by a rotation shaft 73 formed at a position corresponding to the intersection of the parabolic member 4 and the first mirror 200. connected to. One end of the first telescopic arm 31 is rotatably connected to a fixed part 8 fixed to the parabolic member 4 by a rotation shaft 74, and the other end of the first telescopic arm 31 rotates once. It is rotatably connected to the first mirror 200 by a shaft 73 .

Next, the first mirror 200 is arranged to face the pair of stereo photographs, and serves to bend the i-measured line of sight from the stereo photographs in the direction of the second mirror 300 . The first mirror 200 is configured to be slidable on the parabolic member 4 by an appropriate moving means. This first mirror 200 has a first pantograph 210 attached to a rotation shaft 73.
A first mirror support member 220 is formed on the diagonal of the first pentagraph 210, and the first mirror support member 220 and the first mirror 200 are always at right angles. It is designed to be maintained. Therefore, the first pantograph 210 and the first mirror support member 220 hold the first mirror 200 so that its inclination angle coincides with the tangential direction of the parabolic member 4. Even if the first mirror 200 moves on the parabolic member 4, the inclination angle of the first mirror 200 always matches the tangential direction. Note that the direction of the first mirror support member 220 is maintained in the normal direction at the intersection of the first mirror 200 and the parabolic member 4.

The second mirror 300 is for guiding the light beam from the first mirror 200 to the eyepiece section 6. A fixing part 8 fixed in the vertical direction is provided substantially at the top of the parabolic member 4,
The rotation shaft 74 formed at the lower end of this fixed part 8 allows
A second mirror 300 is rotatably attached 9
A second pantograph 310 is rotatably attached to this rotation shaft 74.
A second mirror support member 320 is formed at the diagonal portion of the mirror 10 . Therefore, the second mirror support member 32 is always
0 and the second mirror 300 are held at right angles. The second mirror 300 configured in this way is
When the second mirror 200 moves on the parabolic member 4, it rotates around a rotation axis 74 formed in the fixed part 8, and its inclination angle is maintained parallel to the first mirror 200. This rotation axis 74 corresponds to the first rotation center, and the first rotation axis 74 is formed at the focal point of the parabolic member 4.

Next, the parabolic members 4, 4 are configured to draw an appropriately determined parabola, and the first mirror 2
Furthermore, the position corresponding to the focal point of this parabola is the rotation axis 74 formed in the fixed part 8.
It has become. And the rail member 5 is the right cursor 21
and for moving the left cursor 22 in the horizontal direction.

Therefore, the right cursor 21 and the narrow cursor 22 are moved to the rotation axis 7.
When the first mirror 200 is moved away from the position where the first mirror 200 is formed, the first mirror 200 is lowered along the parabolic member 4 by the telescopic arm 3. When the left and right cursors 21 and 22 approach the position of the rotation axis 71, the first mirror 200 rises along the parabolic member 49 and the eyepiece 6.

This corresponds to an imaging optical system, and is composed of a coupling lens section 61, a prism 62, and the like. This eyepiece part 6 is
It is possible to receive the light flux from the second mirror 300 and form a stereo image.

Next, one embodiment of the cursor driving section 23 will be described in detail based on FIG. The cursor drive section 23 is.

A pair of feed screws 231, 231, a knob 232, and a first
pulley 233, and a pair of second pulleys 234, 234.
, the third pulley 235, the belt 236, and the tension springs 237, 237.

It consists of a pair of knobs 238, 238 and a pair of crank knobs 239, 239. Feed screw 231.2
31, both have right-hand threads with the same pitch,
It is designed to be screwed together with U-Tsuku 238. A second pulley 234 is formed at the end of the feed screw 231. A first pulley 233 is connected to the knob 232, and when the knob 232 is rotated, the first pulley 233
are constructed so that they rotate in synchronization. A rotation shaft 2351 is formed on the third pulley 235, and this rotation shaft 23
Tension springs 237, 237 are attached to 51. Then, the belt 236
34-First pulley 233-Second pulley The PA is installed in the order of the third pulley, and when the knob 232 is rotated, the first pulley 233 is rotated, and a pair of feed screws are rotated by belt transmission. Rotates 231,2316 times. For example, when the knob 232 is rotated clockwise, the feed screw 234 on the right cursor section 21 side rotates counterclockwise with respect to the advancing direction of the screw, and in contrast, the left cursor section 22y! The feed screw 234 rotates clockwise with respect to the advancing direction of the screw. As a result, the left and right cursor sections 21 and 22 move by the same amount in the direction in which they approach each other (in opposite directions, toward the beginning of the figure). Further, when the knob 232 is rotated counterclockwise, the rotation direction of the feed screw 234° 234 is also reversed, and the left and right cursor portions 21 and 22 are moved by the same amount in the direction away from each other (in opposite directions). A push button 238 is attached to the right cursor section 21 via a pinion 2391 connected to a crank knob 239. Therefore, when the feed screw 234 rotates, the right cursor section 21 moves simultaneously with the t cursor section 22, but by rotating the 23 crank knobs,
The right cursor portion 21 alone can be moved laterally inward.

In this embodiment, the measuring section 211 formed in the right cursor section 21 can also be configured to be movable back and forth, and this moving mechanism employs a pinion, a cam, etc. Therefore, by rotating the cursor clamp knob 212 linked to the moving mechanism,
The 1w1 parallax can be removed by moving the target measurement unit 211 back and forth.

Further, it is desirable to form a scale on the racks 238, 238 so as to be able to measure the amount of movement of the left and right cursor parts 21,22.
8, 238, and can also be formed on the rail member 5. The cursor driving section 23 is not limited to the above embodiment, and the distance between the left and right cursor sections 21, 22 can be set close to each other at an equal distance or For example, in the above embodiment, the left and right cursor sections 21 and 22 have a configuration that allows them to be separated.
．． 238 was formed, but the left and right cursor parts 21.22
Form six screws.

It is also possible to adopt a configuration in which a straight screw passes through the screw 6. Further, although belt drive is employed in the above embodiment, a chain or wire may also be used. As shown in FIG. 4, a worm gear 2321 is connected to the knob 232, and threaded portions 2312 are provided at both ends of the feed screw 2311 with threads in opposite directions.
2313, and a driven gear portion 2314 formed in the center of this feed screw 2311 and the worm gear 2321.
It is also possible to have a configuration in which the two are screwed together.

And near the left and right cursor parts 21 and 22.

It is also possible to accommodate lighting runs 19.

Next, a method of using the stereo image forming optical character device 1 according to this embodiment will be explained. First, eleven stereo photographs 100.100 are placed at positions facing the first mirror 200.200. Note that it is not limited to a photograph, but a stereo image of Areka is sufficient, and the knob 232 is rotated to match the size of this stereo photograph. When this knob 232 is rotated, the distance between the left and right cursor parts 21.22 changes, and the third telescoping arm 33.33 connected to the left and right cursor parts 21.22 also moves. 1 mirror 200.200 moves along the parabolic member 4.4. The amount of rotation of the knob 232 can be determined using a scale formed on the rack 238. After setting the left and right cursor sections 21 and 22 at appropriate positions, stereoscopic viewing is performed.

The observation line of sight is reflected by the first mirror 200, 200 arranged vertically from the stereo photographs 100, 100, and the luminous flux reflected by the second mirror 300, 300 is
The light enters the eyepiece 6 and can form a stereo image. Here, by adjusting the clamp knob 239 formed on the left cursor portion 21 so that the stereoscopic measurement target becomes a scalpel mark, parallax can be measured. It becomes possible to calculate the Higashi Kasa from this parallax difference. In addition,
Vertical parallax can be removed by rotating the cursor crank knob and adjusting by moving the measuring section 211 back and forth.Next, regarding the case of using stereo photographs 100, 100 of different sizes. 9. In this case, the knob 23
2 to adjust the distance between the left and right cursor parts 21 and 22 to suit the scale formed on the rack 238. Second
As shown in the figure, as the left and right cursor parts 21.22 move, the third telescoping arm 33.33 also moves horizontally, so the first mirrors 200, 200 move along the parabolic member 4.4. Moving. The first mirrors 200, 200 always align with the tangential direction of the parabola, and the second mirror 3
00,300 are also maintained parallel to the inclination of the first mirror 200.200.9 Furthermore, the second mirror 300.
Since the center of rotation of the mirror 300 is set at the focal point of the parabolic members 4, 4, no matter which position the first mirrors 200, 200 move to, the imaging distance L1+L2+L3 remains constant9. Therefore, 10 stereo photos of any size
Even when using 0°100, the i-detection situation does not change,
This has the effect that readjustment is not necessary. The stereoscopic viewing of stereo photographs is a task that requires skill.

This has the outstanding effect of increasing measurement efficiency since it eliminates the need for readjustment.

``Effect j'' In the present invention configured as described above, the first mirror reflects the observation line of sight from the stereo image, and the second mirror reflects the observation line of sight from the stereo image.
The observation line of sight reflected by the mirror is guided to the imaging lens section,
This imaging lens part forms a stereo image, and the second mirror is rotatably supported around the first rotation center, and the first mirror is interlocked with the second mirror. The mirror is configured to move approximately along a parabola with the first rotation center as the focal point, so even if the first mirror is moved to match the size of the stereo image, its imaging distance will always be This has the effect of keeping it constant. Therefore, even if you change the photo size.

There is no need for readjustment such as focus adjustment, and I! Stereoscopic vision can be continued without any change in the imaging state, which has the outstanding effect of being easy to handle and improving measurement efficiency. The marker parts can be arranged in the direction in which the markers are arranged, and the marker parts can be arranged so that they can be spaced equidistantly close to each other or separated from each other, so even if the size of the photograph to be measured changes, the interval between the marker parts can be It has the effect of changing in response to the movement of mirror 1. Therefore, there is an outstanding effect that readjustment such as focus adjustment is not necessary, and a stereo image forming optical device that can maintain the same observation state can be provided.

[Brief explanation of drawings]

The figures show an embodiment of the present invention. Fig. 1 is a diagram explaining the configuration of this embodiment, Fig. 2 is a diagram explaining a state in which the size of a stereo photograph is changed, and Fig. FIG. 4 is a diagram explaining a modification of the cursor driving section, FIG. 5 is a diagram explaining the present invention in detail, and FIG.
The figure is a diagram explaining the properties of a parabola, and FIG. 7 is a diagram explaining the prior art. 21 ・ ・ Fishing. 23 ・ ・ 3 ・ ・ 200 ・ 300 ・ 210 ・ 310 ・ 330 ・ 6 ・ ・ ・ Right cursor・Room cursor・Cursor drive unit・Extendable arm・・First mirror・・Second mirror・・No. 1st pantograph... 2nd pantograph... 3rd pantograph... Eyepiece section Fig. 3 Fig. 6 FI! J (G) Fig. 6 (b) Fig. 5 S Fig. (b) Fig.'''C

Claims (2)

[Claims] (1) A pair of first mirrors arranged to face the pair of stereo images, a pair of second mirrors that guide the light flux from the pair of first mirrors to a pair of imaging lens sections, and a pair of second mirrors arranged to face the pair of stereo images; In a stereo image forming optical device having an imaging optical system including a pair of imaging lens sections for receiving a light beam from a second mirror and forming a stereo image, the second mirror rotates around the first rotation center. The first mirror is rotatably supported by the second mirror, and the first mirror is rotatably supported by the second mirror.
A stereo image forming optical device characterized in that it is configured to be movable approximately along a parabola having a rotation center as a focal point. (2) A pair of marker portions are arranged in the direction in which the pair of imaging lens portions are arranged, and the pair of marker portions are configured to be able to approach or separate from each other by an equal distance. 1. The stereo image forming optical device according to 1.