JP3179450B2 - Stereo slide mount, stereo slide viewer and collimation pattern mask - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereo slide mount capable of adjusting a film mounting pitch, a stereo slide viewer having a function of adjusting a film mounting pitch of the stereo slide mount, and a collimation pattern mask used for the stereo slide viewer. It is about.

[0002]

2. Description of the Related Art In most stereo cameras, the distance between the optical axes of the left and right photographing lenses is fixed, and the field of view of the right and left photographing lenses coincides at infinity. Is formed. In these stereo cameras with fixed distance between optical axes, the pitch of the same subject on the left and right shooting screens changes according to the distance between the subjects, the pitch of the subject at infinity is equal to the pitch of the left and right screens, As the distance approaches, the pitch of the subject is expanded more than the pitch of the screen.

Since the image on the photographing screen is turned upside down and left and right, the left and right films are rotated by 180 ° and mounted on a stereo slide mount in an upright image state. At this time, the screen pitch of the left and right films is changed. If mounting is performed in accordance with the pitch of the left and right windows of the stereo slide mount, the pitch of the short-distance subject will be smaller than the pitch of the left and right windows.

In a stereo slide mount on which a film is mounted in this state, when viewed with a stereo slide viewer, a stereoscopic image of a short-distance object can be seen in a stereo window (the left and right windows of the stereo slide mount match and appear as one window). Image), there is a defect that perspective is unnatural and eye fatigue is great.

Therefore, the pitch of the left and right films is adjusted so that the pitch of the shortest object can be stereo-slide-mounted so that the image of the object at the shortest distance can be seen at the same distance from the stereo window or at a distance from the stereo window. Must be at least the pitch of the left and right windows.

Also, a stereo camera in which the distance between the optical axes of the left and right photographing lenses is automatically adjusted so that the field ranges of the left and right photographing lenses coincide with each other at the focal distance, or the light of the left and right photographing lenses is manually adjusted. Stereo cameras that can adjust the distance between axes are also known, but even with this type of stereo camera, if the pitch of the left and right films is not adjusted when mounting the film, the distance between the in-focus distance is shorter than the focusing distance. Objects are often visible in front of the stereo window.

However, there is a problem that the amount of adjustment of the film pitch is minute, and it is not easy to determine an appropriate film mounting position with the naked eye.

Therefore, there arises a technical problem to be solved in order to easily and accurately adjust the film pitch in a stereo slide mount, and the present invention aims to solve the above problem. And

[0009]

SUMMARY OF THE INVENTION The present invention proposes to achieve the above object, and comprises a base frame and a cover frame provided with a left window and a right window, respectively. A plurality of pins are provided on one side, and a pin hole corresponding to the pin is provided on the other side,
In a stereo slide mount that allows the base frame and cover frame to be joined by overlaying the cover frame on the surface of the base frame and fitting the pins and pin holes, a left-right guide groove is formed on the surface of the base frame. The two film holders, each having a window of the same size as the screen size of the film and capable of mounting one frame of film, can be engaged with the guide groove of the base frame to adjust the horizontal distance between the two film holders. A stereo slide mount is provided.

Further, the left and right eyepieces, a stereo slide viewer comprising a slide holder portion for loading a stereo slide mount, intermediate the right and left eyepieces, and outside the field of view of the right and left eyepieces, putter
Center of stereo slide mounted by mask
Two inner end film pitch adjusting mechanism by pressing the vertical angle portion Ru can be slid to the outside of the film holder on the base frame which is exposed to the window 43 provided in, and adjustably configured spacing two film holder It provides a stereo slide viewer.

A collimation pattern mask having the same shape as the cover frame 1 is provided with the same collimation pattern on the left and right transparent windows made of resin or glass, and a central window is opened at an intermediate portion between the left and right transparent windows. Provide a collimation pattern mask formed so that the inside corners of the two film holders are exposed in the central window when the collimation pattern mask is overlaid on a base frame with two film holders Is what you do.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a cover frame 1, two film holders 2, and a base frame 3 that constitute a stereo slide mount, all of which are resin injection molded parts. FIG. 1A shows a base frame 3 of the cover frame 1. Is shown on the back side.

Like the conventional stereo slide mount, left and right windows 4L, 4R, 5L, 5R are formed in the base frame 3 and the cover frame 1, and two windows sandwiched between the base frame 3 and the cover frame 1 are formed. A window 6 is also formed in the film holder 2.

All of these windows 4L, 4R, 5L, 5
The vertical dimension of R, 6 is equal to the vertical dimension of the screen of the stereo slide film, the width W0 of the windows 4L, 4R of the cover frame 1 is slightly smaller than the screen width of the film, and the width W1 of the window 6 of the film holder 2 is The dimensions are equal to the screen width of the film, and the width W2 of the windows 5L and 5R of the base frame 3
Is an arbitrary value equal to or greater than the horizontal width W0 of the windows 4L and 4R of the cover frame 1. The center pitch of the left and right windows 4L and 4R of the cover frame 1 is desirably about 63 mm, which is substantially equal to the distance between the human eyes.

The base frame 3 shown in FIGS.
The upper and lower middle portions are concave portions 3b lower than the upper and lower edges 3a.
The concave portion 3b is formed as a dovetail groove in which the vertical width is wider than the interval between the upper and lower edges 3a, and a plurality of pins 7 are formed in the upper and lower edges 3a. The upper and lower edges of the cover frame 1 are formed with pin holes 8 to be fitted with the pins 7 of the base frame 3.
Is mounted, and the pin 7 and the pin hole 8 are fitted, so that the base frame 3 and the cover frame 1 are integrally connected.

Base frame 3 with dovetail groove
As shown in FIG. 1 (e), the film holder 2 having a trapezoidal cross section forms a fitting pair, and the film holder 2 mounted on the base frame 3 can be slid in the left-right direction.

Inside the left and right windows of the base frame 3,
When the stopper pins 9 are provided, and the two film holders 2 are slid in the approaching direction and brought into contact with the stopper pins 9, the pitch of the windows of the two film holders 2 becomes negative in the film pitch adjustment range. In this case, the pitch of the windows of the film holder 2 is slightly narrower than the pitch of the windows of the cover frame 1.

As shown in FIG. 2, instead of the stopper pin, a film holder 2 and a base frame 3 are provided.
An index I for positioning may be provided.

As shown in FIGS. 1 (c) and 1 (d), the film holder 2 is a pentagon with one vertical side projecting in a V shape, and the V-shaped vertical sides of two identical film holders 2 are opposed to each other. Then, it is mounted on the base frame 3. Film holder 2
The left and right two film positioning pins 10 are located above and below the window 6.
When the perforation of the film is set by engaging with the film positioning pins 10, the screen of the film and the window 6 of the film holder 2 are formed so as to coincide with each other.

Regarding the positioning of the film in the vertical direction, the thickness of the film holder 2 is formed to be slightly smaller than the depth of the concave portion 3b of the base frame, and
The upper and lower edges 3a position the film vertically.

Alternatively, the vertical width of the film holder is made wider than that in the illustrated example, and a shallow horizontal groove having a width equal to the vertical width of the film is formed in the upper and lower center of the film holder. There are various means, such as positioning of the film and forming positioning bosses in contact with the film holder on both the upper and lower sides, without any particular limitation.

The vertex of the V-shaped vertical side of the film holder 2 comes into contact with a helical cam of a stereo slide viewer, which will be described later. Therefore, it is desirable to provide a slight radius to reduce frictional resistance.

On the back surface of the cover frame 1, there is provided a horizontally elongated recess 11 for avoiding interference with the film positioning pins 10 of the film holder 2. When the cover frame 1 is mounted on the base frame 3, The film holder 2 on the frame 3 can be freely slid in a predetermined range in the left-right direction. As shown in the figure, the concave portion 3 of the base frame 3
Alternatively, a convex surface portion 1a in contact with b may be provided.

Further, in order to prevent the film holder 2 mounted on the base frame 3 from sliding due to vibration or the like, a minute projection is formed on the back surface of the film holder 2 or a matting process is performed on the concave portion 3b of the base frame 3. It is desirable to take non-slip means.

FIG. 3 shows a stereo slide viewer 21. Similar to a conventional stereo slide viewer, a pair of left and right eyepieces 23L and 23R are arranged in front of a grooved slide mount holder 22, and a slide mount holder 22 is provided. , An illumination light bulb 24 and an arc-shaped reflector 25 are arranged behind the reflector 25. The bulb 24 is turned on by a battery (not shown) stored behind the reflector 25, and the reflector 25 is turned on.
Thus, light is emitted to the back surface of the slide mount holder 22. The left and right eyepiece holders 26L, 26R
Has a structure capable of adjusting the distance between the optical axes and the focus in the optical axis direction. A leaf spring 22a is provided on a rear wall surface in the slide mount holder 22, and the leaf spring 22a
As a result, the stereo slide mount in the slide mount holder 22 is pressed against the wall surface on the eyepiece lens side and positioned.

A film pitch adjusting device 27 is arranged between the left and right eyepiece optical systems. The film pitch adjusting device 27 adjusts the interval between the film holders 2 of the stereo slide mount by rotating the helical cams 28L and 28R.

As shown in FIG. 4, the pair of left and right helical cams 28L and 28R have a D-shaped cross section in which the outer peripheral surface of the disk is partially cut out linearly, and as shown in FIG. Helicoid cam surfaces 29L and 29R are formed on the outer edge of the left cam surface 29L, and the left cam surface 29L and the right cam surface 29R are symmetrical.

The two helical cams 28L, 28R are fitted on a cam shaft 31 with a spur gear 30 interposed therebetween.
The left and right ends of 1 are supported by bracket bearings 32 provided on the viewer frame. A pinion shaft 33 is disposed below the cam shaft 31 in parallel with the cam shaft 31, and a pinion 34 fitted on the pinion shaft 33 meshes with the spur gear 30 and is attached to an end of the pinion shaft 33. Knob 35
By turning, the helical cams 28L and 28R rotate.

As shown in FIG. 5, the inner diameters of the center holes of the left and right bracket bearings 32, the two helical cams 28L and 28R, and the central spur gear 30 are, from left to right, the left bracket bearing 32, the left helical cam 28L, The gear 30, the right helical cam 28R, and the right bracket bearing 32 become larger in this order, and the camshaft 31 also has a stepped shape corresponding to each hole diameter.

When assembling the film pitch adjusting device 27, two helical cams 28L, 28R and a central spur gear 30 are set between the left and right bracket bearings 32, and the phases of the two helical cams 28L, 28R are accurately adjusted. When the cam shaft 31 is press-fitted leftward from the outside of the right bracket bearing 32 in a state where the two helical cams 2
8L, 28R, the central spur gear 30 and the camshaft 31 are tightly fitted, and the camshaft 31 and the left and right bracket bearings 32 are clearance fits.
L, 28R and the central spur gear 30 are integrated. The gear for driving the helical cam may be a worm gear or a bevel gear instead of the illustrated spur gear 30, and is not particularly limited.

FIG. 6 shows a collimation pattern mask 41 which can easily recognize the optimum pitch when adjusting the film pitch of the stereo slide mount with the stereo slide viewer 21. The collimating pattern mask 41 has a similar shape to the cover frame 1, and has left and right transparent windows 42L,
Portions other than 42R are coated with a light-shielding paint or formed of colored resin so that light does not pass through, and a square window 43 is provided at the center.

The dimensions and positions of the transparent windows 42L, 42R, the pin holes 44, the recesses 45 and the like are the same as those of the cover frame 1, and a plurality of vertical lines are formed on the rear surfaces (surfaces in contact with the films) of the transparent windows 42L, 42R. Main collimation pattern CP
Is printed, and this surface is subjected to an anti-Newton ring treatment.

As shown in FIG. 6B, the transparent window 42
The surfaces of the transparent windows 42L, 42R are slightly lower than their surroundings so as not to contact the wall surface of the slide mount holder 22 of the stereo slide viewer.
42R is prevented from being scratched. In addition, in order to prevent the surface of the film from being scratched when adjusting the film pitch, the back surface of the collimation pattern mask 41 may be coated with a material having a low coefficient of friction such as Teflon or polyethylene to finish it smoothly. desirable.

The left and right ends of the stereo slide mount and the collimation pattern mask 41 are arc-shaped, so that they can be easily inserted into the slide mount holder 22.
Since the slide mount holder 22 can be inserted even when the width thereof is the same as the width of the base frame 3, the displacement of the stereo slide mount in the slide mount holder 22 in the left-right direction can be prevented.

Next, the procedure for mounting the film and adjusting the film pitch will be described. 1. As shown in FIG. 7, two film holders 2 on the left and right sides are mounted on the base frame 3, and the film F is mounted on the film holder 2 with the left and right film holders 2 approaching each other closest to each other. At this time, the pitch of the windows of the two film holders 2 is slightly smaller than the pitch of the windows of the cover frame 1. 2. The collimation pattern mask 41 is mounted on the base frame 3. As shown in FIG. 8, the inner end of the film holder 2 appears to be exposed inside the central window 43 of the collimation pattern mask 41. 3. The base frame 3 with the collimation pattern mask 41 is inserted into the slide mount holder 22 of the stereo slide viewer 21. 4. Eyepiece 23 of stereo slide viewer 21
The perspective of the image with respect to the image of the collimation pattern CP of the collimation pattern mask 41 is observed through L and 23R. If the image is visible on the same plane as the collimation pattern CP or behind the collimation pattern CP, the film pitch of the stereo slide mount is appropriate, and it is not necessary to adjust the film pitch. Therefore, the stereo slide mount is detached from the stereo slide viewer 21, the collimation pattern mask 41 is detached from the base frame 3, and the cover frame 1 is mounted instead to complete the mounting operation.

However, in most cases, the subject in the foreground is seen in front of the collimation pattern CP. In this case, it is necessary to adjust the film pitch. 5. The knob 35 of the stereo slide viewer 21 is rotated to adjust the film pitch. In FIG. 4, pinion 3
4 rotates counterclockwise, the helical cams 28L, 2
8R rotates clockwise from the initial position in FIG.
9L and 29R are inserted between the two film holders 2, and the cam surfaces 29L and 29R are in contact with the vertices of the inner vertical sides of the film holder 2 and are pushed outward.
The interval of is expanding.

At this time, the area where the outer edge of the film screen is masked by the edge of the window of the collimation pattern mask 41 increases, and the distance of the stereoscopic image with respect to the image of the collimation pattern CP recedes far. To go. The optimum film pitch is when the stereoscopic image is visible on the same plane as the collimation pattern CP or behind the collimation pattern CP. At this time, the knob 35 is rotated in the reverse direction to rotate the helical cams 28L and 28R.
To the initial position. Then, the stereo slide mount is detached from the stereo slide viewer 21, the collimation pattern mask 41 is removed from the base frame 3, and the cover frame 1 is mounted instead, and a stereo slide mount with an optimum film pitch is completed.

The completed stereo slide mount can be viewed with the stereo slide viewer 21, and even if the knob 35 is rotated at the time of viewing, the film holder 2 can be viewed.
Is shielded by the cover frame 1, the helical cams 28L and 28R do not contact the film holder 2 and the film pitch does not change. still,
If a click stop mechanism is provided on the pinion shaft 33 or the cam shaft 31 in order to fix the helical cams 28L, 28R at the initial position, the helical cams 28L, 28R are inadvertently provided.
28R does not rotate, and handleability is good.

When adjusting the film pitch, when the film pitch exceeds the optimum pitch and becomes excessive, and the stereoscopic image is seen farther than the collimation pattern CP, the film pitch must be readjusted. Become. At this time, the knob 35 is rotated in the reverse direction to rotate the helical cams 28L, 28L.
R is returned to the initial position, the left and right film holders 2 are slid to the position closest to each other, and the knob 35 is rotated again to adjust the film pitch again. Although not shown, a protrusion or a recess is formed on the surface near the vertex of the V-shaped vertical side of the film holder 2 so that the two film holders 2 can be easily slid to the closest position with a fingernail. Can be.

In the conventional stereo slide mount, when the offset amount of the film exceeds the set limit, the side edge of the film appears in the window of the mount, and the gap between the side edge of the film and the edge of the window. Since the light leaks from the space, the offset adjustment exceeding the set limit cannot be performed.

On the other hand, in the stereo slide mount of the present invention, since the film is mounted on the window frame type film holder 2, if the offset amount of the film holder 2 exceeds the set limit, the vertical side of the film holder 2 will not move. Appearing in the windows 4L and 4R of the cover frame 1, the side edges of the film and the window 4
Since there is no space between the edges of L and 4R, offset adjustment exceeding the set limit is also possible. However, in this case, the black edge of the film and a part of the film holder 2 can be seen in the windows 4L and 4R of the cover frame 1, so that when the film holder 2 is white or light-colored, it becomes annoying. If the surface of the holder 2 is made black, it does not become annoying.

FIG. 9 shows another embodiment of the film pitch adjusting mechanism of the stereo slide viewer. Similar to the film pitch adjusting mechanism of FIG. 3, the left and right brackets are provided in the space between the left and right eyepieces (not shown). Place the bearing 51,
Pivot shaft 52 supported by left and right bracket bearings 51
A block 53 is attached to the center of the block 53, and two levers 54 are pivotally mounted on a lever shaft on the back of the block 53.

The upper ends of the two levers 54 are bent rearward to form claws 54a, and the two levers 54 arranged in an X shape are urged in the direction in which the upper ends are closed by a tension spring 55. Have been.

Between the lower ends of the two levers 54, a wedge-shaped slider 56 slidable back and forth is disposed, and a female thread (not shown) formed on the back surface of the wedge-shaped slider 56.
Is engaged with the male screw shaft 57. Also, two levers 5
A stopper 58 is provided in front of the lower end of 4.
The block 53 can rotate in a range between a position where the lower ends of the two levers 54 abut against the stopper 58 and a position where the lower ends of the levers 54 retreat to some extent,
The lower end of the lever 54 is urged by a tension spring 59 in a direction to retract.

Here, when the male screw shaft 57 is rotated clockwise in FIG. 9, the wedge-shaped slider 56 advances in the direction of the stopper 58 by the feed screw action of the female screw and the male screw, and the lower ends of the two levers 54 are moved. Press to stop 58
Contact. At this time, the upper portions of the two levers 54 rotate rearward, and although not shown, the claw portions of the levers 54 are interposed between the left and right film holders 2 sandwiched between the base frame 3 and the collimation pattern mask 41. 54a enters.

Further, when the male screw shaft 57 is rotated clockwise, the lower ends of the two levers 54 in contact with the stopper 58 are expanded by the wedge-shaped slider 56 which advances, and the upper ends of the upper ends which expand in conjunction with each other are opened. The claw portion 54a pushes the left and right film holders 2 to expand the pitch, and the film pitch can be adjusted in the same manner as the stereo slide viewer 21 described above.

The present invention is not limited to the above embodiment, and various modifications are possible within the technical scope of the present invention, and it goes without saying that the present invention extends to those modifications. is there.

[0048]

As described above, the stereo slide mount of the present invention can arbitrarily adjust the pitch of the left and right films, so that the perspective of a stereoscopic image can be adjusted to an optimum state. In addition, by using the stereo slide viewer and the collimation pattern mask of the present invention, the pitch of the film on the stereo slide mount can be adjusted while observing the stereoscopic images of the left and right films, and the adjustment can be performed easily and accurately.

[Brief description of the drawings]

FIG. 1 shows a stereo slide mount of the present invention;
(A) is a rear view of the cover frame, (b) is a side view of the cover frame, (c) and (d) are front views of the film holder, (e) is a side view of the film holder, and (f) is a base frame. (G) is a side view of the base frame.

FIG. 2 is a front view showing another embodiment of a base frame and a film holder.

FIG. 3 is a plan sectional view of the stereo slide viewer of the present invention.

FIG. 4 is a side view of a film pitch adjusting device of the stereo slide viewer.

FIG. 5 is a plan sectional view showing an assembling process of the film pitch adjusting device.

FIG. 6 shows a collimation pattern mask, (a) is a front view,
(B) is a side sectional view.

FIG. 7 is a front view showing a procedure of a film pitch adjusting operation, in which a film holder and a film are mounted on a base frame.

8 is a front view of the base frame in the state of FIG. 7 with a collimation pattern mask mounted thereon.

FIG. 9 is a perspective view showing another embodiment of the film pitch adjusting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover frame 2 Film holder 3 Base frame 21 Stereo slide viewer 27 Film pitch adjustment device 28 Helical cam 30 Spur gear 34 Pinion 41 Collimation pattern mask 42 Transparent window 43 Central window

Claims (14)

(57) [Claims] 1. A base frame provided with a left window and a right window, and a cover frame. A plurality of pins are provided on one of the base frame and the cover frame, and a pin hole corresponding to the pin is provided on the other. In a stereo slide mount that allows the base frame and the cover frame to be joined by overlaying the cover frame on the surface of the base frame and fitting the pins and pin holes,
Form left and right guide grooves on the surface of the base frame,
Two film holders, each having a window of the same size as the screen size of the film and capable of mounting one frame of film, are engaged with the guide grooves of the base frame, making it possible to adjust the distance between the two film holders in the left-right direction. Stereo slide mount. 2. The stereo slide mount according to claim 1, wherein the width of the window of the cover frame is smaller than the width of the screen of the film. 3. A positioning pin which can be engaged with the perforation of the film above and below the window of the film holder, and the screen of the film engaged with the positioning pin and the window of the film holder are formed to coincide with each other. The stereo slide mount according to 1. 4. A positioning pin capable of engaging with the perforation of the film is provided above and below the window of the film holder, and the screen of the film engaged with the positioning pin is formed so as to coincide with the window of the film holder. 2. The stereo slide mount according to claim 1, wherein a recess is formed on a back surface of the cover frame mounted on the base frame and the film holder to avoid interference with positioning pins of the film holder. 5. A stopper for positioning the film holder between the left and right windows of the base frame, and when the two film holders are brought into contact with the stoppers, the pitch of the windows of the two left and right film holders is adjusted to the pitch of the cover frame. The stereo slide mount according to claim 1, wherein the stereo slide mount is formed to be narrower than the pitch between the left and right windows. 6. An index for positioning the base frame and the film holder is provided, and when the index of the base frame and the index of the film holder are matched, the pitch of the windows of the two right and left film holders is changed to the cover frame. 2. The structure according to claim 1, wherein the pitch is smaller than the pitch between the left and right windows.
Stereo slide mount as described. 7. The stereo slide mount according to claim 1, wherein opposing inner vertical sides of the two film holders are arc-shaped or V-shaped, and a middle part of the vertical sides is projected inward. 8. The stereo slide mount according to claim 1, wherein the left and right ends of the base frame and the cover frame are arc-shaped or arc-shaped. 9. The stereo slide mount according to claim 1, wherein the surfaces of the two film holders are black. 10. A stereo slide viewer comprising left and right eyepieces and a slide holder for mounting a stereo slide mount, wherein a pattern is provided between the left and right eyepieces and outside the field of view of the left and right eyepieces. Ma
Center window of stereo slide mounted by disc
43 Two films pitch adjustment mechanism inner end by pushing the apex angle of Ru can be slid to the outside of the film holder on the base frame exposed provided, adjustably configured stereo slide apart the two film holder Viewer. 11. The film pitch adjusting device of the stereo slide viewer is a symmetrical helical cam pivotally supported on a horizontal axis parallel to a slide mount holder portion, wherein the helical cam is provided between the two film holders on the base frame. The stereo slide viewer according to claim 10 , wherein the stereo slide viewer is formed such that the distance between the two film holders is extended by inserting and rotating the film holder. 12. A film pitch adjusting device for a stereo slide viewer comprising two levers which open and close symmetrically in a left and right direction, wherein a tip of each of the two levers is inserted between two film holders on the base frame. The stereo slide viewer according to claim 10, wherein the distance between the two film holders is increased by expanding the film holder. 13. A collimation pattern mask having the same shape as the cover frame 1, wherein the same collimation pattern is provided on left and right transparent windows made of resin or glass, and a central window is opened at an intermediate portion between the left and right transparent windows. A collimation pattern mask formed such that the inside corners of the two film holders are exposed in the center window when the collimation pattern mask is superimposed on a base frame on which the two film holders are mounted. 14. The collimation pattern mask according to claim 13, wherein the left and right ends of the collimation pattern mask have an arc shape or an approximate arc shape.